What is NAS Certification?
NAS is an independent UK certification scheme for contractors, trades and SMEs. Applicants submit real business evidence for assessment against defined criteria before a certification decision is made.
Independent UK Contractor Certification
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.
4
Cert Tiers
ISO
17021 Principles
100%
Independent
£349
Starting Price
Developed using ISO/IEC 17021 principlesIndependent AssessorsEvidence-Based AssessmentPublic Certificate RegisterAnnual Renewal Cycle
NAS is operated by BuiltRight Technologies Ltd, certified to:ISO 9001ISO 27001ISO 45001
Public Verification
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 [email protected]
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.
Housing associations & registered providers
Local authorities & councils
NHS trusts & public sector bodies
Main contractors & principal contractors
Facilities management companies
Commercial property managers
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.
Electrical Contractors
EICR & competency verified
Plumbing & Heating
Gas Safe & insurance checked
Roofing Contractors
H&S policy & RAMS reviewed
Main Contractors
Full procurement compliance
Facilities Management
FM compliance assessed
Groundworkers
Waste & environmental checked
Decorators
EDI & COSHH assessed
Drainage Contractors
Environmental & H&S review
35+ Trade & Sector Categories covered by NAS
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.
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.
NASSelf-Declaration Schemes
Independent assessor✕
Real documents reviewed✕
Publicly verifiable✕
Separation of decisions✕
Developed using ISO 17021 principles✕
Annual renewal check✕
Simple Process
From Application
to Certificate.
01
Apply Online
Fill in your application form at no charge. Select your certification tier.
02
Submit Evidence
Upload your documents to your secure portal — policies, insurance, RAMS and more.
03
Assessed
A qualified, independent assessor reviews your evidence against defined criteria.
04
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.
Loyalty PricingWe Reward Loyalty —
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
Yr 1
0%
Full price
Yr 2
5%
Off renewal
Yr 3
10%
Off renewal
Yr 4
15%
Off renewal
Yr 5+
20%
Max saving
Why it counts
A certificate buyers can actually check.
Every NAS certified business is on the public register with a certificate number anyone can verify in seconds. The register only ever shows businesses that have been independently assessed — and a certificate that lapses or is withdrawn shows that straight away.
Assessed, not self-declared
Your evidence is checked by a NAS assessor, and certification is decided by a separate decision maker.
Listed when you pass
Your company, tier and certificate number go on the public register the day your certificate is issued.
Checkable by anyone
Buyers verify your certificate number online, and see straight away if it has expired or been withdrawn.
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.
Clear answers
NAS Certification questions, answered.
How much does NAS Certification cost?
Annual prices start at £349 for Basic, with Bronze at £749, Silver at £950 and Gold at £1,150, plus VAT. No payment is taken when you submit the initial application.
How long does NAS Certification take?
Most evidence reviews are completed within 3–5 working days after submission. The total time depends on whether any missing evidence or corrective action is identified.
Is NAS the same as accreditation?
No. NAS certifies businesses against its defined scheme requirements. Accreditation is formal recognition of a certification body by an accreditation body such as UKAS.
How can a buyer verify a NAS certificate?
Buyers can search the free NAS Certified Business Register by business name or certificate number and view the current certification status, tier and validity dates.
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:
LondonBirminghamManchesterLeedsGlasgowLiverpoolSheffieldBristolNewcastleNottinghamCardiffBelfastEdinburghLeicesterCoventryBradfordStoke-on-TrentWolverhamptonPlymouthSouthamptonReadingDerbyPortsmouthBrightonHullPrestonMilton KeynesNorwichSwanseaAberdeenLutonNorthamptonBournemouthMiddlesbroughSunderlandExeter
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.