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The all-in-one platform for NRTAUK members, managing accreditation, training, networking, and business resources.

CHASAlternative UK | NRTAUK NAS certification scheme

CHASAlternative UK on NRTAUK NAS certification scheme. NRTAUK NAS certification scheme is a live compliance and supply chain platform s.

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NRTAUK NAS Certification — Evidence-Based Contractor Compliance for UK Businesses

NAS Certification for Contractors. Live Compliance Control for Buyers.

NRTAUK NAS is an evidence-based UK business certification scheme for contractors, trades and SMEs. 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. Working towards UKAS accreditation.

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 make procurement conversations easier.

For Buyers & Procurement

Stop chasing supplier paperwork. NRTAUK 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 certification 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 and working towards UKAS accreditation

Who Is NAS Certification For?

NAS certification is for UK contractors, subcontractors, tradespeople, and SMEs who want to demonstrate live compliance, win more contracts, and get onto approved supplier lists.

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 NRTAUK portal
An independent assessor reviews your evidence against the NAS 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 →