How to Hire a Trusted Plumber in 2026 (UK)
Plumbing jobs are often urgent — and urgency is exactly when homeowners skip the checks and get burned. A burst pipe at 9pm is not the moment to start vetting, so the work is best done in advance. There is no single statutory licence for general plumbing, but gas work demands Gas Safe registration and water-supply work falls under WaterSafe approval. This 7-step process is what BestBuilders uses to screen every plumber on our register, plus the 3 red flags that almost always signal a rogue trader.
The 7-step plumber vetting checklist
1. Match the registration to the job
For boilers, gas hobs and any gas appliance, the plumber must be Gas Safe registered — check the register and the ID card. For mains cold-water work, look for WaterSafe approval. General plumbing (taps, waste, radiators) has no statutory licence, so reviews and references carry the weight.
2. Insurance check (£2m+ public liability)
Water damage claims are expensive. Ask for a current Public Liability certificate (£2m minimum) and confirm with the insurer it is in date before any work involving pipework under pressure.
3. Clear pricing in writing
Agree whether the job is a fixed price or charged at an hourly/callout rate, and get it in writing. For larger jobs insist on a fixed quote; for small repairs confirm the callout charge and hourly rate up front so there are no surprises.
4. Ask about parts and guarantees
Confirm whether parts are charged at trade or retail, and what guarantee covers both parts and labour. A reputable plumber stands behind the work for a defined period.
5. Reviews and references
Read recent verified reviews and, for bigger jobs like a bathroom or boiler swap, ask for a reference you can call. Patterns in reviews — punctuality, tidiness, no surprise charges — tell you more than a single rating.
6. Get it in writing before work starts
Scope, price basis, parts and guarantee — all confirmed by email or written quote before the plumber begins. This single step prevents the most common disputes.
7. Sensible payment terms
For small jobs, pay on completion. For larger jobs, a modest deposit for materials with the balance on completion is standard. Avoid paying large sums up front.
3 red flags that almost always signal a rogue trader
- No Gas Safe ID for gas work — unregistered gas work is illegal and dangerous. Never proceed.
- Cash-only or no VAT receipt — no paper trail means no recourse if the work leaks or fails.
- Price quoted only after the job is done — refusing to agree a price or rate before starting is the classic set-up for an inflated bill.
FAQs
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