The Government-endorsed quality scheme for tradespeople. Required for work funded through government energy efficiency schemes (ECO4, Great British Insulation Scheme). Consumers can search TrustMark to find vetted tradespeople.
| Issued by | TrustMark |
|---|---|
| Typical cost | £180 a year |
| Renewal | Every year |
| Who needs it | Electricians, gas engineers, heating engineers, plumbers, insulation installers, solar installers, heat pump engineers, builders, groundworkers |
What you need to get it
4 requirements, and what counts as evidence for each.
Join via Approved Scheme Operator
Register through a TrustMark-approved scheme operator relevant to your trade (e.g. NICEIC, Gas Safe, CHAS, NAPIT, BESCA). If you are already a member of one of these, TrustMark registration is often included or heavily discounted.
Evidence: Existing membership with a TrustMark-approved scheme operator.
Technical Competency Check
Your scheme operator will verify your technical competency and insurance as part of the registration process.
Evidence: Technical qualifications and insurance documents submitted to scheme operator.
Trading Standards Background Check
TrustMark conducts a Trading Standards check. Businesses with serious consumer complaints or trading standards actions may be refused.
Evidence: No action required — TrustMark conducts this check automatically.
Customer Satisfaction Commitment
Agree to TrustMark’s consumer code, including collecting and publishing customer satisfaction feedback.
Evidence: Signed acceptance of TrustMark Consumer Code of Conduct.
What you have to keep doing
Getting it is the easy part. Keeping it means:
Collect Customer Feedback
Proactively collect and publish customer satisfaction ratings via TrustMark’s feedback system.
Maintain Scheme Membership
Maintain your underlying scheme membership (NICEIC, Gas Safe, etc.) — if that lapses, TrustMark registration also lapses.
Is it worth it?
At £180, the question isn’t the fee — it’s whether it wins you work. For electricians it usually does, because it’s the first thing a cautious customer or a commercial buyer checks. Most trades hold accreditations and then hide the logos in the footer. If you’ve paid for it, it belongs where customers actually look.
Tracking it
Accreditations lapse quietly. The renewal date lands in a busy month, nobody spots it, and you find out when a customer asks for the certificate. Gaffer keeps your accreditations, evidence and renewal dates in one place and reminds you before they expire.