Require NAS-Certified Subcontractors
On Your New-Build Developments.
House builders and volume residential developers are responsible for the compliance of every subcontractor on site. NAS gives you independently assessed evidence that your supply chain meets the UK legal standards required for new-build residential construction — before a single nail goes in.
Why Require NAS From Your Subcontractors?
As a principal contractor, you carry responsibility for your supply chain's compliance under CDM Regulations and wider UK law. Self-declaration isn't enough — you need independently verified evidence.
The Risk Without It
Why Requiring NAS Protects You
How NAS Works For You
Independent, evidence-based contractor certification you can rely on.
Instant Register Search
Verify any subcontractor on the free NAS public register — search by company name or certificate number, no login required.
Evidence-Based Assessment
Every NAS certificate is backed by documented evidence reviewed by an independent assessor — not a checkbox questionnaire.
CDM & H&S Coverage
NAS Basic and above independently assess Health & Safety at Work Act compliance — directly relevant to CDM principal contractor obligations.
Building Regs at Gold
NAS Gold includes assessment against Building Regulations Act — essential for new-build residential subcontractors.
Always Current
Annual renewal keeps all NAS certificates live. The register flags expired credentials — protecting your supply chain integrity year-round.
Procurement Due Diligence
Using NAS-certified subcontractors gives your commercial and QS teams documented, auditable supply chain compliance evidence.
Frequently Asked Questions
Are You a Contractor? See Your Trade
Find Verified House Builder Contractors Instantly
NAS TradeLink gives procurement teams and main contractors direct access to a network of independently verified NAS-certified contractors. Post your requirement and receive ranked matches based on trade, location, certification tier, and real-time availability.