What is NAS Certification?

NAS (National Assurance Standard) is an independent, evidence-based UK accreditation and certification for contractors, tradespeople, and SMEs. It is aligned with ISO/IEC 17021 and assessed by qualified, independent assessors.

How much does NAS Certification cost?

NAS Basic costs £349/year, NAS Bronze costs £749/year, NAS Silver costs £950/year, and NAS Gold costs £1,150/year. Loyalty renewal discounts apply from year 2.

Is NAS Certification the same as CHAS?

No. NAS Certification is independent of CHAS. Unlike CHAS, NAS uses real assessor review of actual evidence documents — not self-declaration — and is aligned with ISO/IEC 17021.

How long does NAS Certification take?

Most NAS assessments are completed within 3-5 working days of submitting your evidence. The full process from application to certificate typically takes 1-3 weeks.

Assessor Dashboard | NAS National Assurance Standard

Assessor Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.

Pages

Expiry Monitoring — Expiry Monitoring on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Constructionline Silver Vs Gold — Constructionline Silver Vs Gold on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Chas Smas Constructionline Safecontractor — Chas Smas Constructionline Safecontractor on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
ESG Score Page — ESGScore Page on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Plastering Dry Lining NAS — Plastering Dry Lining NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Member Profile View — Member Profile View on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Safe Contractor Cost Comparison — Safe Contractor Cost Comparison on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Publisher Portal — Publisher Portal on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMSISO Mapping — QMSISOMapping on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
How Our Compliance Scan Works — How Our Compliance Scan Works on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Waste Management NAS — Waste Management NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Appeals Procedure — Appeals Procedure on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Carpenters NAS — Carpenters NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
SMAS Requirements Checker — SMASRequirements Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CAPA Details — CAPADetails on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
View RAMS — View RAMS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
RAMS — RAMS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assessor Manager — Assessor Manager on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Business Record Detail — Business Record Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Publish Tender — Publish Tender on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Retail Leisure NAS — Retail Leisure NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Legacy Tool Redirect — Legacy Tool Redirect on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
MOD Defence — MODDefence on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Groundworks Civils NAS — Groundworks Civils NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Nas Certification — Nas Certification on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assessor Guide — Assessor Guide on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS Edit Document — QMSEdit Document on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Compliance Hub Guide — Compliance Hub Guide on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Business News — Business News on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
RAMS Checker — RAMSChecker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Rail NAS — Rail NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Local Authorities NAS — Local Authorities NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Policy Builder — Policy Builder on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Workforce Profile View — Workforce Profile View on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Basic Application — Basic Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Safe Contractor Requirements Checker — Safe Contractor Requirements Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Buyer View — Buyer View on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Terms And Conditions — Terms And Conditions on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Gold Application — Gold Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Complaint Review — Complaint Review on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Gas NAS — Gas NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Procurement Page — Procurement Page on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Blog Slug — Blog Slug on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Publisher Registration — Tender Publisher Registration on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Management — Supplier Management on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Edit Course — Edit Course on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CRM Tasks — CRMTasks on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Contact — Contact on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Growth Audit — Growth Audit on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Workforce Profiles — Workforce Profiles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS Backoffice — QMSBackoffice on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Jobs — Jobs on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Podcast Manager — Podcast Manager on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Account Settings — Account Settings on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Supply Chain Map — NASSupply Chain Map on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Accredited Business Directory — Accredited Business Directory on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Member Directory — Member Directory on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Company Detail — Company Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Constructionline Vs Certification — Constructionline Vs Certification on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Plant Operators NAS — Plant Operators NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Drain Clearance NAS — Drain Clearance NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Raise NCR — Raise NCR on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
My Saved Tenders — My Saved Tenders on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS New Review — QMSNew Review on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Privacy Policy — Privacy Policy on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS New Audit — QMSNew Audit on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
RAMS Impartiality Admin — RAMSImpartiality Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Scaffolding NAS — Scaffolding NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Applications Hub — Applications Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Impartiality Safeguards — Impartiality Safeguards on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Start Application — Start Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
AI Governance Dashboard — AIGovernance Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Profile — Supplier Profile on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CCS Admin Scans — CCSAdmin Scans on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Insurance Repair NAS — Insurance Repair NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Start Accreditation — Start Accreditation on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CRM Organisation Detail — CRMOrganisation Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Renewal Admin — NASRenewal Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Sales Pipeline — Sales Pipeline on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Health Safety Policy Checker — Health Safety Policy Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Complaints Dashboard — Complaints Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Forum Thread — Forum Thread on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Cleaners NAS — Cleaners NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Complaints Register — Complaints Register on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
RAMS Version History — RAMSVersion History on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
My Supplier Profile — My Supplier Profile on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Industrial Manufacturing NAS — Industrial Manufacturing NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CORE Info — COREInfo on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Forum — Forum on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Dashboard — Tender Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Social Housing NAS — Social Housing NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS New Impartiality — QMSNew Impartiality on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Education Schools NAS — Education Schools NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Certification Standard — NASCertification Standard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Public CORE Courses — Public CORECourses on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Other Trades NAS — Other Trades NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Certification Analytics — Certification Analytics on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
About NRTAUK — About NRTAUK on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Facilities Maintenance — Facilities Maintenance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Detail — Tender Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Job Details — Job Details on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Alert Preferences — Tender Alert Preferences on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Demolition NAS — Demolition NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Maintenance — Maintenance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Blog — Blog on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Buyer Visibility — Buyer Visibility on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Complaints Procedure — Complaints Procedure on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Application Detail — Application Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Certification Flow — NASCertification Flow on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Finder — Tender Finder on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
SEO Dashboard — SEODashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Demo Supplier Hub — Demo Supplier Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Accreditation Backoffice — Accreditation Backoffice on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Change Request Admin — NASChange Request Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
My Training Hub — My Training Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Application Form — Application Form on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Complaint Communication — Complaint Communication on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Security Access NAS — Security Access NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Member Profile — Member Profile on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Scheme Readiness — Scheme Readiness on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Directory — Supplier Directory on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bricklayers NAS — Bricklayers NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
COSHH Checker — COSHHChecker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Constructionline Requirements Checker — Constructionline Requirements Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Commercial Property NAS — Commercial Property NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Main Contractor Demo — Main Contractor Demo on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CCS Admin Review — CCSAdmin Review on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Renewal Review — NASRenewal Review on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NRTAU Kvs CHAS Comparison — NRTAUKvs CHASComparison on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Compliance Hub Dashboard — Compliance Hub Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Complaint Outcome — Complaint Outcome on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Post Job — Post Job on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Consultants Professional Services NAS — Consultants Professional Services NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assessor Training Admin — Assessor Training Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS Document — QMSDocument on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Buyer Portal Request — Buyer Portal Request on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Electricians NAS — Electricians NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Sectors Hub — Sectors Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Create RAMS — Create RAMS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Admin Notifications — Admin Notifications on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Admin — Tender Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Client Hunter — Client Hunter on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Local Deals Admin — Local Deals Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Member User Guide — Member User Guide on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Choose Payment Plan — Choose Payment Plan on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Find Local Deals — Find Local Deals on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
ESG Report — ESGReport on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NCR Management — NCRManagement on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bronze Application — Bronze Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Platform Guide — Platform Guide on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
My Accreditation — My Accreditation on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Accreditation Audit Log — Accreditation Audit Log on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Scheme Control — Scheme Control on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Member Dashboard — Member Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CHAS Alternative UK — CHASAlternative UK on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Hospitals NHS — Hospitals NHS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Staff Training Hub — Staff Training Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
ISO Requirement Admin — ISORequirement Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Trade Link Public — NASTrade Link Public on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
How Accreditation Works — How Accreditation Works on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CRM Calendar — CRMCalendar on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
System Audit Log — System Audit Log on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Create Sales Cycle — Create Sales Cycle on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
About — About on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Sales Guide — Sales Guide on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Sale Cycle Detail — Sale Cycle Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Housing Associations — Housing Associations on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Windows Doors Glazing NAS — Windows Doors Glazing NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Plumbers NAS — Plumbers NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
SMA Svs CHAS Difference — SMASvs CHASDifference on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Accredited Register — Accredited Register on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Public Supply Chain Demo — Public Supply Chain Demo on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Training Programme — Training Programme on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Review Initial Application — Review Initial Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Compliance Hub Admin — Compliance Hub Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Demo Centre — Demo Centre on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
View Member Profile — View Member Profile on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Signup — Supplier Signup on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assess Application — Assess Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Public Sector NAS — Public Sector NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
My Saved Tenders Enhanced — My Saved Tenders Enhanced on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Surface Repair NAS — Surface Repair NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Employee Training — Employee Training on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Compliance Hub Pricing — Compliance Hub Pricing on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS For Contractors — NASFor Contractors on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Support — Support on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Flooring Tiling NAS — Flooring Tiling NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS For Procurement — NASFor Procurement on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Forum Category — Forum Category on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
My Tender Applications — My Tender Applications on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assessor Management Gov — Assessor Management Gov on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Log New Complaint — Log New Complaint on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Assessment Case — NASAssessment Case on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Contractor Insurance Checker — Contractor Insurance Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Roofers NAS — Roofers NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Governance Overview — Governance Overview on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Course Module — Course Module on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Certificate Builder — Certificate Builder on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo Redirect — Seo Redirect on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Application Detail — NASApplication Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Tender Flow — NASTender Flow on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Trade Link Buyer — Trade Link Buyer on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Core Learning Admin — Core Learning Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Contact NRTAUK — Contact NRTAUK on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Document Management — Document Management on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Applications Management — Applications Management on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Main Contractors — Main Contractors on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Certified Business Records — Certified Business Records on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CRM Organisations — CRMOrganisations on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Utilities Infrastructure NAS — Utilities Infrastructure NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Trade Accreditation — Trade Accreditation on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Downloads — Downloads on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Blog Post — Blog Post on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Decorators NAS — Decorators NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Admin User Management — Admin User Management on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Readiness — Tender Readiness on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Course Certificate Designer — Course Certificate Designer on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Data Hub — Supplier Data Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Workforce Governance — Workforce Governance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
AI Assessor Queue — AIAssessor Queue on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Messages — Messages on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence Hub — Intelligence Hub on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Landscaping Grounds NAS — Landscaping Grounds NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CAPA Register — CAPARegister on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CHAS Requirements Checker — CHASRequirements Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Contractors Page — Contractors Page on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Document Verification — NASDocument Verification on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Public Home
Buyer Organisation Admin — Buyer Organisation Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Certificate Verify — Certificate Verify on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CRM Dashboard — CRMDashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Training Evidence Checker — Training Evidence Checker on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fitters NAS — Fitters NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Business Settings — Business Settings on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Course Detail — Course Detail on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Silver Application — Silver Application on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CCS Admin Rules — CCSAdmin Rules on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Check My Role — Check My Role on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Podcast — Podcast on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Create CAPA — Create CAPA on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Chat Insights — Chat Insights on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Invite User — Invite User on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Subscription Required — Subscription Required on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
House Builders — House Builders on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Payment Success — Payment Success on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CCS Admin — CCSAdmin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Governance Impartiality — Governance Impartiality on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fire Safety NAS — Fire Safety NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assessor Training Programme — Assessor Training Programme on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
HVAC Refrigeration NAS — HVACRefrigeration NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Edit RAMS — Edit RAMS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
ISO Library — ISOLibrary on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Public Register — Public Register on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Trade Link — NASTrade Link on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
FAQ Page — FAQPage on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Compliance Vault — Compliance Vault on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Info — NASInfo on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Generate Sales Pack — Generate Sales Pack on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CORE Training — CORETraining on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Home — Home on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Trainee Course Player — Trainee Course Player on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Tender Publisher Dashboard — Tender Publisher Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Worker Trade Perk Invite — Worker Trade Perk Invite on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supply Chain Portal Demo — Supply Chain Portal Demo on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Audit Log — Audit Log on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Assessment Decisions — Assessment Decisions on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Blog Manager — Blog Manager on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Contractor Compliance Score — Contractor Compliance Score on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Solar EV Renewables NAS — Solar EVRenewables NAS on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
CRM Opportunities — CRMOpportunities on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Register — Register on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Payment Cancelled — Payment Cancelled on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Toolbox Talk Sign — Toolbox Talk Sign on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
NAS Live Profile — NASLive Profile on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
QMS New Document — QMSNew Document on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Workforce Buyer View — Workforce Buyer View on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
RAMS Engine — RAMSEngine on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supply Chain Portal — Supply Chain Portal on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Suppliers Page — Suppliers Page on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
ISO Clause Admin — ISOClause Admin on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Course Content Manager — Course Content Manager on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Knowledge / NAS Basic Bronze Silver Gold — knowledge/NASBasic Bronze Silver Gold on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Knowledge / Approved Contractor Register UK — knowledge/Approved Contractor Register UK on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Knowledge / How To Become Producrement Ready — knowledge/How To Become Producrement Ready on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Knowledge / Certification Vs Accreditation — knowledge/Certification Vs Accreditation on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / Future Workforce Home — fw/Future Workforce Home on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW For Schools — fw/FWFor Schools on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW For Sponsors — fw/FWFor Sponsors on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Events — fw/FWEvents on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Pricing — fw/FWPricing on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Trainee Dashboard — fw/FWTrainee Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW For Young People — fw/FWFor Young People on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Register Interest — fw/FWRegister Interest on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Payment Success — fw/FWPayment Success on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Employer Dashboard — fw/FWEmployer Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW For Employers — fw/FWFor Employers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Admin Dashboard — fw/FWAdmin Dashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW For Parents — fw/FWFor Parents on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW For Training Providers — fw/FWFor Training Providers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Fw / FW Contact — fw/FWContact on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Contractor Certification UK — seo/Contractor Certification UK on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Live Contractor Compliance — seo/Live Contractor Compliance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Contractor Compliance Certification — seo/Contractor Compliance Certification on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Contractor Certification Pricing — seo/Contractor Certification Pricing on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Knowledge Centre — seo/Knowledge Centre on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Evidence Based Certification — seo/Evidence Based Certification on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Approved Contractor Register — seo/Approved Contractor Register on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Get Certified — seo/Get Certified on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Procurement Ready Contractors — seo/Procurement Ready Contractors on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Supplier Compliance Verification — seo/Supplier Compliance Verification on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / For Buyers — seo/For Buyers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For Councils — seo/sector/Certification For Councils on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For Commercial Property — seo/sector/Certification For Commercial Property on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For Main Contractors — seo/sector/Certification For Main Contractors on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For House Builders — seo/sector/Certification For House Builders on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For Schools — seo/sector/Certification For Schools on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For Healthcare — seo/sector/Certification For Healthcare on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Sector / Certification For Housing Associations — seo/sector/Certification For Housing Associations on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Landscaping — seo/trade/Contractor Certification Landscaping on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Roofers — seo/trade/Contractor Certification Roofers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Plumbers — seo/trade/Contractor Certification Plumbers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Security — seo/trade/Contractor Certification Security on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Cleaning — seo/trade/Contractor Certification Cleaning on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Electricians — seo/trade/Contractor Certification Electricians on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Groundworkers — seo/trade/Contractor Certification Groundworkers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification FM — seo/trade/Contractor Certification FM on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Drainage — seo/trade/Contractor Certification Drainage on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Fire Safety — seo/trade/Contractor Certification Fire Safety on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Building Maintenance — seo/trade/Contractor Certification Building Maintenance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Seo / Trade / Contractor Certification Property Maintenance — seo/trade/Contractor Certification Property Maintenance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Public Job Board — bsr/BSRPublic Job Board on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Settings — bsr/BSRSettings on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Guide — bsr/BSRGuide on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Dashboard — bsr/BSRDashboard on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Enterprise Enquiry — bsr/BSREnterprise Enquiry on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / Building Safety Register Home — bsr/Building Safety Register Home on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Portal — bsr/BSRPortal on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / Building Safety Demo — bsr/Building Safety Demo on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Trade Link — bsr/BSRTrade Link on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Property Import — bsr/BSRProperty Import on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / Building Safety Checkout — bsr/Building Safety Checkout on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / Building Safety Pricing — bsr/Building Safety Pricing on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Properties — bsr/BSRProperties on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Golden Thread — bsr/BSRGolden Thread on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Competent Register — bsr/BSRCompetent Register on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Actions — bsr/BSRActions on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Demo Portal — bsr/BSRDemo Portal on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Contractors — bsr/BSRContractors on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Bsr / BSR Compliance — bsr/BSRCompliance on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Intelligence Category Page — intelligence/Intelligence Category Page on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Intelligence Article — intelligence/Intelligence Article on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Intelligence Home — intelligence/Intelligence Home on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Building Safety Articles — intelligence/articles/building Safety Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Insurance Articles — intelligence/articles/insurance Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Workforce Articles — intelligence/articles/workforce Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Guides Articles — intelligence/articles/guides Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Certification Articles — intelligence/articles/certification Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Health Safety Articles — intelligence/articles/health Safety Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Intelligence / Articles / Data Protection Articles — intelligence/articles/data Protection Articles on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Network / Supplier Network Home — supplier network/Supplier Network Home on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Network / Supplier Network Join — supplier network/Supplier Network Join on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Network / Supplier Directory — supplier network/Supplier Directory on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Network / Supplier Network How It Works — supplier network/Supplier Network How It Works on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Network / Supplier Network Member Offers — supplier network/Supplier Network Member Offers on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.
Supplier Network / Supplier Network Benefits — supplier network/Supplier Network Benefits on NAS National Assurance Standard. NAS National Assurance Standard certification scheme.

body { font-family: Arial, sans-serif; max-width: 900px; margin: 0 auto; padding: 20px; color: #1f2937; } h1 { color: #111827; } h2 { color: #374151; border-bottom: 2px solid #fbbf24; padding-bottom: 8px; } .tiers { display: flex; gap: 20px; flex-wrap: wrap; } .tier { border: 1px solid #e5e7eb; border-radius: 8px; padding: 16px; flex: 1; min-width: 200px; } a { color: #b45309; } nav a { margin-right: 16px; }

NAS — National Assurance Standard | UK Accreditation & Contractor Certification

UK Accreditation & Certification for Contractors. Business Support & Growth Nationwide.

NAS (National Assurance Standard) is an independent, evidence-based UK accreditation and certification scheme for contractors, trades and SMEs in every town and city across the UK. Contractors prove their compliance, manage key documents and share live supplier data with buyers. Procurement teams get a clearer view of certification status, insurance, workforce records, RAMS, CIS information and contractor risk — without chasing endless emails.

Independent assessment. Evidence-based certification. ISO/IEC 17021 aligned.

Apply for NAS Certification → | Request Buyer Access →

Stop Paying for a Badge. Start Building Proof.

For Contractors

Get NAS certified, build credibility, manage compliance documents, create RAMS, track workforce records and win more work. Show buyers live compliance evidence, reduce repeated document requests, and grow your business with procurement-ready accreditation.

For Buyers & Procurement

Stop chasing supplier paperwork. NAS gives procurement, HSEQ and supply chain teams a live view of contractor compliance, certification status, insurance, workforce training, policies, RAMS, CIS records and financial health indicators.

Request free buyer access →

NAS Certification Tiers

NAS Basic — £349/year

Entry-level H&S accreditation for sole traders and small businesses. Covers Health & Safety Policy, RAMS assessment, digital NAS certificate and public register listing.

Apply for Basic

NAS Bronze — £749/year

Full compliance certification for SMEs & contractors covering core legislation and operational compliance. Includes Data Protection, GDPR, Equality & Diversity, and insurance verification.

Apply for Bronze

NAS Silver — £950/year

Enhanced compliance for growing SMEs with governance, environmental policy, risk management evidence and operational maturity. Priority processing included.

Apply for Silver

NAS Gold — £1,150/year

Procurement-ready certification covering 22 compliance areas including Building Safety Act, corporate governance, PQQ response generator and shareable buyer profile.

Apply for Gold

Built Around Impartial Assessment

Evidence-based assessment — no self-declaration
Independent assessor review
Certification decision separation
Full audit trail
Complaints and appeals process
Public certificate verification
Public register of certified businesses
Aligned with ISO/IEC 17021 principles

Who Is NAS Certification For?

NAS accreditation is for UK contractors, subcontractors, tradespeople, and SMEs who want to demonstrate live compliance, win more contracts, and get onto approved supplier lists — supporting business growth in every region of the UK.

Recognised by housing associations, main contractors, local councils, NHS trusts, MOD suppliers, and procurement teams across the UK.

How NAS Certification Works

Submit your online NAS application at nrta.uk
Upload your compliance evidence to the secure NAS portal
An independent assessor reviews your evidence against the National Assurance Standard
Receive a decision — approval, corrections required, or NCR raised
Certificate issued and your business listed on the NAS Certified Business Register

Full guide to how NAS certification works →

Compare NAS to Other UK Compliance Schemes

NAS vs CHAS
CHAS Alternative UK
SafeContractor cost comparison
Constructionline vs NAS Certification
SMAS vs CHAS