Require NAS-Certified Subcontractors
On Every Project You Deliver.
As principal contractor, you own the compliance of your entire supply chain under CDM Regulations. NAS gives you independently assessed, publicly verifiable subcontractor compliance — covering H&S, RIDDOR, Modern Slavery, Environmental Protection, and Public Contracts Regulations — so you can build with confidence.
Why Require NAS From Your Subcontractors?
Under CDM 2015, you are responsible for the health, safety, and legal compliance of every subcontractor on your site. A non-compliant subcontractor incident isn't just their problem — it is yours. Independent verification matters.
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 free on the NAS public register — by name or certificate number, no login required. Confirm current NAS tier and certificate status before they step on site.
CDM-Ready Evidence
NAS certification provides independently reviewed, documented evidence of subcontractor compliance — exactly what CDM Regulation 4 requires you to hold on file for every subcontractor.
Live Compliance Profile — Not a Static Certificate
Certified subcontractors share a secure link to their live profile. You see current insurance status, assessor-verified documents, confidence score, and named operative cards — updated in real time, not at point of issue.
Named Workforce Verification
See named operatives the subcontractor has registered — CSCS, IPAF, CPCS, Gas Safe, and trade cards — with live Green / Amber / Red status per individual. Verify before they arrive, not after an incident.
Traffic Light Expiry Alerts
Documents, insurance, and certifications display Green (current), Amber (expiring within 30 days), or Red (expired) on the shared profile. No chasing — the risk is visible instantly.
Supply Chain Portal for Main Contractors
Access the NAS Supply Chain Portal — a dedicated dashboard showing all your certified subcontractors, their live compliance status, confidence scores, and workforce data in one searchable view. No document requests needed.
Frequently Asked Questions
Are You a Contractor? See Your Trade
Find Verified Main Contractor 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.