Risk

New build red flags: the warning signs

Builds rarely go wrong suddenly. The signs are usually visible before a contract is signed — in how a builder quotes, and in what they will put in writing.

5 min read · Updated August 2026 · Select My Builder

Builds rarely go wrong suddenly. They go wrong slowly, and the early signs are usually visible well before a contract is signed — in how a builder quotes, how they answer questions, and what they are willing to put in writing.

None of the signs below is proof of anything on its own. Several together, in the same builder, is a pattern worth acting on.

The quote is materially cheaper than the others

A quote twelve per cent below three comparable quotes is not a discount. It is one of three things: a different scope, lower allowances, or a builder buying work to keep volume up.

The third is the dangerous one. A builder pricing below cost to win jobs is financing today's build with tomorrow's deposit, and that model only works while new deposits keep arriving. When they stop, the builds in progress are the ones that stall.

Before treating a low quote as good news, find out which of the three explanations it is. There is always an explanation.

Allowances that look too comfortable

Site cost allowances, provisional sums and prime cost items are the easiest places to make a quote look competitive without changing the building.

A tile allowance nobody can actually buy tiles within, a site cost allowance assuming the best possible soil classification, a provisional sum for work that has not been scoped — each of these lowers the headline figure and moves the cost to a point after you have signed. If the allowances in one quote are consistently lower than in the others, the quote is not cheaper. It is later.

Pressure to sign, and deposits that arrive early

Urgency is the most reliable warning sign in the whole process. Price rises expiring this week, a lot that will be gone by Friday, a promotion that ends when you leave the office.

Related, and more serious: pressure to pay a substantial deposit before the contract is finalised, or before finance is formally approved. There are legitimate reasons for a modest initial payment. There is no legitimate reason for you to be rushed.

A reluctance to put things in writing

Verbal reassurance is not a contract term. If a builder is comfortable telling you something — that a particular inclusion is covered, that the site cost is capped, that a delay will not attract a charge — they should be comfortable writing it into the contract.

Hesitation at exactly this point is informative. So is "we always do that, it's just not in the contract."

Contract terms that quietly move the price

Read for these specifically:

  • Rise-and-fall or price escalation clauses. These allow the price to increase after signing, usually tied to material costs. They are not automatically unfair, but you should know whether one exists, what triggers it, and whether it is capped.
  • Broad extension-of-time provisions. Every contract allows time extensions for weather and genuine delay. Very broad, loosely defined grounds are a different thing.
  • Margin on variations. A variation is not just the cost of the change — there is usually a builder's margin on top. Find out the percentage before you need it, not after.
  • Progress claim schedules weighted to the front. Payments that run well ahead of work completed shift the risk onto you.

The entity you are contracting with is new

A builder can have twenty years of experience and a company that is eighteen months old. Those are separate facts, and only one of them is on the contract.

What matters is whether the entity carrying the obligation has the trading history and the financial position to stand behind it. A recently created company, a name that has changed, or the same people behind a series of previous entities are all worth understanding properly before you commit.

Licensing that doesn't match the work

Licence class, currency and any conditions should match the scope of what you are asking them to do. Related: insurance and statutory home warranty cover need to be current and correctly in place, and the timing of when that cover attaches is worth confirming rather than assuming.

These are quick things to establish and they are, occasionally, decisive.

Signs during the build

If you are already under contract, the patterns change:

  • The site goes quiet. Not the ordinary gaps between trades — extended periods with no activity and no explanation.
  • Trades and suppliers ask you about payment. A subcontractor raising money with the homeowner is a serious signal about the builder's cash position.
  • Progress claims arrive ahead of progress. A claim for a stage that has not been reached should never be paid because the paperwork says so.
  • Communication becomes harder. A supervisor who was responsive going quiet is often the earliest observable sign of a builder under strain.
  • Variations increase in frequency. Especially variations for things a reasonable scope should have anticipated.

What to do when you see a pattern

Before contract: slow down. Nothing you are being rushed toward gets worse for waiting a week. Get the quotes onto the same scope so you can see whether the cheap one is actually cheap, and have the contract read by someone whose job is reading contracts.

During the build: put concerns in writing, keep a dated record, do not pay ahead of completed work, and get advice early. The cost of advice at the first sign of trouble is trivial against the cost of a stalled build.

The uncomfortable truth is that most of these signs are visible before signing. They are missed not because they are subtle but because by the time people look, they have already chosen the house.

Or have the checks run before you sign

Assessment against the Select My Builder Standard, competitive tender on the same scope, and a contract cross-check against what was tendered — so the things above are found before they cost you.

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