Prove Your
Standards.
Win Better Work.
NAS is an independent UK business certification scheme. Independent assessors review your real compliance documents and issue a publicly verifiable certificate that helps you win more work, build trust with buyers, and keep your compliance organised — from £349/year.
Verify a Certificate
Instantly verify NAS certification status. Search by company name, certificate number, or registration number.
All searches are logged for security purposes. For disputes contact support@nas-certification.co.uk
For Buyers & Procurement
Reduce Procurement Risk.
Verify Instantly.
NAS allows buyers, principal contractors, housing providers, facilities management companies, local authorities and procurement teams to verify contractor certification status and review assurance information before appointing suppliers.
Unlike many self-declaration schemes, NAS certifications are backed by independently reviewed documentary evidence. Every certificate on the public register has passed a defined assessment process — giving procurement teams genuine confidence in the contractors they appoint.
Public Certificate Register
Freely searchable register of all NAS certified businesses with live status.
Live Verification
Instantly verify any contractor's NAS certification status before appointment.
Expiry Monitoring
Certifications display issue and expiry dates. No reliance on contractors to self-report.
Independent Assessment
Every certificate is backed by a documented evidence review — not self-declaration.
Annual Renewal Cycle
Certified businesses must resubmit evidence annually to maintain certification status.
Certification Status Checks
Know whether a contractor is Active, Expired, or Suspended before you engage.
Built for UK Trades
Stop Losing Jobs
to Competitors
With a Certificate.
Housing associations, councils, NHS trusts, and main contractors are demanding verified compliance before awarding work. NAS gives you the independently-assessed certification that procurement teams trust — not a rubber stamp you buy online.
Evidence Reviewed by a Real Assessor
Your documents are checked by a qualified, independent assessor — not an algorithm or self-declaration tick-box.
Separate Assessors & Decision Makers
No one certifies their own work. Assessors and decision makers are kept structurally separate at every stage.
Listed on the Public Register
Any buyer, council, or housing association can instantly verify your certificate number. Credibility you can show on quotes.
Why Choose NAS?
Built for businesses that want
more than a badge.
Many assessment schemes focus on whether a business can meet a specific buyer or pre-qualification requirement. NAS goes further by helping businesses understand, evidence and maintain their compliance in a clear, structured and practical way.
Policies
Insurance
Health & Safety
Legal Duties
Workforce Evidence
Data Protection
Operational Controls
Document Freshness
The purpose of NAS is not simply to issue a certificate. It is to give businesses a stronger compliance framework, clearer evidence, better document control and greater confidence when presenting themselves to clients, contractors and procurement teams.
It is not just a badge. It is structure, evidence, guidance and business assurance in one place.
Certification Tiers
Four Levels of NAS Certification.
From sole trader health & safety through to full procurement-ready compliance. Start where you are, upgrade as you grow.
BASIC
Health & Safety
/year + VAT
- Health & Safety Policy review
- RAMS assessment
- Digital NAS certificate
- Public register listing
BRONZE
Core Compliance
/year + VAT
- All Basic H&S checks
- Data Protection & GDPR
- Equality & Diversity
- Insurance verification
No payment taken at application stage. · View the Certified Business Register →
"The certificate number on our quotes changed how clients respond."
— Grays Building Solutions, NAS Basic
Why NAS Stands Apart
Not Another
Rubber Stamp.
Many schemes let you self-declare compliance. NAS doesn't. Every application is assessed by a real, independent assessor checking real documents — so when you show a buyer your certificate, it actually means something.
Simple Process
From Application
to Certificate.
Apply Online
Fill in your application form at no charge. Select your certification tier.
Submit Evidence
Upload your documents to your secure portal — policies, insurance, RAMS and more.
Assessed
A qualified, independent assessor reviews your evidence against defined criteria.
Certified
Certificate issued and you're listed on the public register. Show buyers instantly.
Built for UK Trades
Housing Associations. Councils. NHS.
They all demand certified contractors.
We Reward Loyalty —
Not Penalise It.
Flat, transparent pricing. We never raise your price based on staff numbers or turnover. Stay with us and your renewal gets cheaper every year — up to 20% off by year five.
Price never rises with headcount
Unlike many schemes that scale fees by headcount or turnover
Registered Businesses
UK Businesses Registered With NAS
These businesses are registered with NAS. Registration does not indicate certification status.
Member Reviews
Trusted by UK
Tradespeople.
"NAS Gold changed how procurement teams see us. The independent assessment gave buyers real confidence. Saved us hours on every tender."
BuiltRight Technologies
Main Contractor · NAS Gold
"As a smaller contractor, Basic tier was straightforward. Our certificate number on quotes has changed how clients respond. Highly recommended."
Grays Building Solutions
Building Contractor · NAS Basic
"The independent assessment gave us real insight into compliance gaps. We fixed them, got certified, and now we're winning better contracts."
Drain Pro Solutions
Drainage Specialist · NAS Bronze
"The transparency of NAS gives buyers confidence to engage with us. It's a credibility bridge. The assessor was thorough and rigorous."
Surface Repair Group Ltd
Surface Specialist · NAS Silver
"NAS gave us the credibility we needed to tender for larger contracts. The process was thorough and the certificate is genuinely respected by buyers."
Your Champions
Specialist Contractor · NAS Bronze
"Getting NAS certified was one of the best decisions we made. Clients now ask for our certificate number — it's opened doors we didn't have before."
Drain Doctor Horsham
Drainage Specialist · NAS Gold
Governance & Independence
Why Procurement Teams
Trust NAS.
NAS is designed to meet the expectations of professional procurement teams. Transparent. Independent. Verifiable.
Independent Assessors
Assessors are qualified and independent. No one certifies their own work or that of a connected party.
Evidence Review Process
Every application is assessed against defined criteria using submitted documentary evidence — not self-declaration.
Public Verification Register
Any buyer can independently verify a certificate number on the public NAS register at any time.
Annual Surveillance
Certified businesses must resubmit evidence annually. Certification does not roll over automatically.
Appeals Process
Formal appeals procedure is available to all applicants. Decisions can be reviewed independently.
Complaints Process
A documented complaints procedure is in place for both applicants and third parties.
Certification Governance
NAS operates under a defined governance framework developed using recognised certification scheme principles.
Certificate Monitoring
Certificates that expire, are suspended or withdrawn are updated on the public register in real time.
Professional. Independent. Verifiable. Procurement-Ready.
NAS is a certification scheme — not a membership badge.
NAS certification is issued through a structured assessment process based on documented business evidence. Assessments are reviewed by competent personnel, with certification decisions controlled through separation of roles, impartiality safeguards and documented procedures developed in line with ISO/IEC 17021 certification principles.
Nationwide UK Coverage
NAS Certification & Business Accreditation Across the UK
NAS — the National Assurance Standard — provides independent, evidence-based contractor certification for trades, contractors and SMEs in every town, city and region across the United Kingdom. From sole traders to main contractors, NAS certification helps businesses prove compliance, appear on approved supplier lists, and win work with verified credentials.
Accreditation & certification support in:
Serving businesses across England, Scotland, Wales, Northern Ireland, Greater London, the Midlands, the North West, the North East, Yorkshire, the South West, the South East, East Anglia — and every town in between.