Most building disputes are predictable in hindsight. Almost every homeowner who’s had a bad experience can point to a moment early on — a gut feeling ignored, a question brushed off — that turned out to matter. These are the warning signs worth taking seriously before you sign anything, not after.
No Written Quote, or a Quote That Won’t Sit Still
A genuine fixed-price quote is written, itemised, and doesn’t change unless you change the scope. If a builder is reluctant to put a price in writing, or the number keeps moving before work has even started, that’s not a good sign of things to come once the job is underway and changes become much harder to challenge.
Pressure to Pay a Large Deposit Upfront
Some deposit is normal — it secures your slot and covers initial material orders. A demand for 50% or more before any work has started is not normal, and it flips the risk entirely onto you. If the relationship sours after that payment, you have far less leverage to get it resolved.
Reluctance to Provide Insurance Documents
This should be a five-minute request with a same-day answer. Hesitation, vague reassurances, or “I’ll email it to you” that never arrives is one of the clearest signals available before you’ve committed to anything. Public liability insurance protects you, not just the builder — don’t proceed without seeing it.
No Fixed Address or Company Registration
A builder with a genuine, established business will have a proper trading address and — ideally — a registered limited company you can look up on Companies House. A mobile number and a Facebook page with no other footprint is a much harder business to hold accountable if something goes wrong.
Cash-Only, No Paper Trail
A cash preference on its own isn’t automatically a red flag — plenty of legitimate small tradespeople prefer it. But cash-only combined with reluctance to provide any written quote, invoice, or contract is a different situation entirely. No paper trail means no evidence if a dispute ever needs resolving.
Vague Answers About Who’s Actually Doing the Work
“We’ll have someone on it” without a clear answer about who’s managing your project, and whether that’s the same person throughout, often predicts a fragmented experience — different faces on site each week, no continuity, and nobody who can give you a straight answer about progress.
No Local Track Record You Can Verify
Ask for examples of similar work in Bath or the surrounding area, ideally something you could look up. A builder who’s genuinely established locally will have a body of work behind them. One who can’t point to any verifiable local projects is a much bigger unknown.
Quotes That Ignore Planning or Building Regs Entirely
If a quote for extension or structural work doesn’t mention planning permission or Building Control at all, ask directly who’s managing that process. Silence on this point often means it hasn’t been thought through — and an unplanned planning delay is one of the most common ways projects stall for months.
Reluctance to Give a Written Warranty
A verbal “don’t worry, we’ll come back and sort it” is not a warranty. Ask for the guarantee period and what it actually covers, in writing, before you sign. If a builder won’t commit to anything in writing, that tells you what they expect the quality of the finished work to be.
Trust Your Own Hesitation
None of these signs alone is proof of a problem — but two or three together, especially combined with a feeling of being rushed, is a pattern worth walking away from.
If something about a quote, a conversation, or a builder’s manner doesn’t sit right, that instinct is usually worth listening to.
As a Bath builder that’s Companies House verified, MCIOB chartered, and £10M+ insured, we’d rather you checked all of this before booking than took our word for it. Arrange a free site visit and ask us every question on this list — we’re used to it.
