NAS Certification for
Plumbers & Plumbing Businesses.
UK plumbers and heating engineers working for housing associations, FM companies, main contractors, and NHS trusts need more than a Gas Safe card. NAS business certification gives you the independently assessed compliance credentials to win and retain contracts in regulated sectors.
Why Plumbing Businesses Need NAS Certification
A Gas Safe registration or CIPHE membership confirms your technical competence. NAS certification confirms your business is compliant with the laws and regulations that housing associations, FM contractors, and main contractors check before awarding contracts.
NAS Basic — £349/yr
Health and safety policy and arrangements, risk assessments and method statements, COSHH, CDM duties, training, insurance and subcontractor checks — the SSIP core criteria.
NAS Bronze — £749/yr
Everything in Basic plus legal identity and licences, employers’ liability insurance, data protection, equality, complaints handling, employment terms and right-to-work checks.
NAS Silver — £950/yr
Everything in Bronze plus environmental and waste management, quality and corrective action, governance and conflicts of interest, competition law, pensions, working time and subcontractor approval.
NAS Gold — £1,150/yr
Everything in Silver plus 13 procurement modules: financial standing, anti-bribery and integrity disclosures, tax status, cyber security, ethical supply chain, sustainability and Building Safety Act readiness.
What You Get With NAS Certification
Certification goes beyond a certificate — it opens doors and gives you tools to grow.
Public Register Listing
Housing associations and FM buyers verify your NAS certificate on the free NAS register.
Clear Tier Requirements
Each tier lists exactly what evidence you need, so you know what to prepare before you apply.
Assessor-Reviewed Evidence
An assessor checks your actual documents, so your certificate carries weight with buyers.
Expiry Reminders
Reminders before your NAS certificate, and dated documents you have submitted such as insurance, expire.
Annual Re-Assessment
Renewal includes a fresh evidence review, so buyers know your certificate reflects current documents.