How to Check a Builder's References (2026) — The Questions to Ask
References are the single best predictor of how a builder will treat your job. Before you sign anything in 2026, ask every builder for two or three recent customers, then actually contact them, ask the right questions about timekeeping, budget and snagging, and back it up with online reviews and a Companies House check. A good builder is proud of their references — reluctance is your first red flag.
Checking a builder's references — the short answer
- Ask for 2–3 recent customers — ideally jobs similar to yours, finished in the last year.
- Actually contact them — a quick call or visit tells you far more than a written testimonial.
- Ask specific questions — timekeeping, budget, communication, snagging and would they hire them again.
- Verify independently — Google reviews, trade-body directories and Companies House.
- Watch for red flags — vague answers, no recent work, or references that can't be reached.
A genuine reference takes a builder seconds to provide and you minutes to check — and it is the closest you can get to seeing how your own project will run before you commit a penny.
The Questions to Ask a Builder's Past Customers
Work through these with each referee. Compare the answers like-for-like across the builders you are considering.
Where you can, ask to visit a finished job in person — seeing the quality of the brickwork, plastering or tiling in the flesh beats any photo or testimonial.
Warning Signs in a Builder's References
“I'll find someone”
An established builder has recent customers to hand. Struggling to name any is a sign of little recent work — or unhappy clients.
Only old jobs
References from five years ago tell you little about the team working today. Ask for jobs completed in the last 12 months.
Reviews that don't add up
A burst of five-star reviews on the same day, generic wording or no detail can indicate fake reviews. Look for specific, dated, project-level feedback.
Dissolved or renamed company
Check Companies House. A firm that keeps dissolving and re-forming under new names may be shedding a trail of unhappy customers.
Common Questions
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