The 5 Most Common Building Disputes — and How to Avoid Every One

Building disputes are more common than most homeowners realise. A 2025 survey found that 1 in 3 UK homeowners reported a significant disagreement with a tradesperson on their last major project. The encouraging news: nearly all of them are entirely preventable.

Here are the five disputes we see most often on TradeMatch — and exactly how to make sure they don't happen to you.

1. Scope creep — "That wasn't included in the quote"

The most common dispute of all. Works expand during a project, the homeowner assumes it's covered, the builder assumes it's an extra. Neither is necessarily wrong — they just had different expectations.

How to avoid it: Before work starts, sign a written scope of works document. Any change — no matter how minor — should be agreed in writing (email is fine) with a revised price before work proceeds. On TradeMatch, our milestone-based project tracking lets both parties log changes in real time.

2. Poor workmanship that's disputed at the end

The homeowner is unhappy with the finish. The builder believes the work is up to standard. With no agreed benchmark, both positions are equally valid — and equally unprovable.

How to avoid it: Specify finish standards upfront. For tiling, reference BS 5385. For plastering, specify whether you expect "skim-ready" or "paint-ready." For flooring, note acceptable lippage tolerances. It sounds excessive, but one sentence in the specification prevents weeks of arguments.

3. Payment disputes mid-project

The builder pauses work pending payment. The homeowner refuses to pay for incomplete or unsatisfactory stages. The project stalls.

How to avoid it: Agree payment milestones tied to clearly defined, inspectable stages of work before the project starts. A typical structure: 15% deposit, 25% at first fix, 25% at second fix, 25% at practical completion, 10% held for 30 days for snagging. Stick to it regardless of how friendly the relationship becomes.

4. The disappearing tradesperson

Work starts well, then the builder begins to prioritise other jobs. Weeks pass between site visits. The project drags on indefinitely.

How to avoid it: Get a written programme of works — even a simple timeline showing when each phase will be completed. Include a clause that daily rates may be deducted for delays beyond agreed timelines (subject to genuine weather or supply chain issues). And check that your builder has capacity before you start — a good tradesperson who's fully booked for six months is worth waiting for.

5. Damage to neighbouring property

Extension works disturb a party wall. Scaffolding damages a neighbour's roof. Groundworks affect a shared drain. These disputes can involve solicitors, surveyors, and insurance claims.

How to avoid it: For any structural work near a boundary, a Party Wall Agreement is legally required under the Party Wall etc. Act 1996. Ensure your builder carries public liability insurance of at least £2 million — all TradeMatch verified builders are required to carry this as a condition of listing. Photograph the neighbouring property before work begins.

The single most important thing

Everything on this list comes down to one principle: put it in writing. A good tradesperson won't be offended by a written agreement. If they are, that's the most important information you'll receive. Find verified tradespeople on TradeMatch.