NOTE Nº 0607 · REV B

Can I Withhold Payment From My Builder? UK Rules

When you can lawfully withhold payment from a builder for defective or incomplete work, how much to hold, the notice to give, and the mistakes that backfire.

By The Renovation Notes Team · 4 min read · Published 22 August 2026 · updated within the last month · Sources checked 30 September 2026

Carpenter working on the wooden structure of a house at a construction site under the sun.

In short

You can lawfully withhold payment that reflects the genuine cost of defective or incomplete work: but not the entire balance over a snagging list, and always with a written explanation showing the calculation. Withholding proportionately, in writing, is the homeowner's strongest everyday lever; withholding everything, silently, converts your builder's breach into yours.

The final invoice has landed and the work isn’t right. Withholding money is your most immediate, most powerful lever, and the one homeowners most often fumble, either by paying in full “to keep the peace” or by refusing to pay anything and handing the builder a claim. The law supports a middle path, and it’s precise.

The principle

Payment and performance are linked: you owe the price for the work as contracted. Where work is defective or incomplete, you’re entitled to hold back the reasonable cost of putting it right, a set-off against the price. The Consumer Rights Act 2015 recognises this: a consumer can rely on the builder’s breach against the builder’s claim for payment.¹ What you’re not entitled to do is withhold sums out of proportion to the problem: a £900 snagging list does not justify sitting on a £9,000 final payment. Disproportionate withholding risks being treated as your own breach, with interest claimed on the unpaid balance. Remember too that the Act’s first remedy is usually to let the builder put the work right at their own cost, so offer that in the same letter.²

How much to withhold

Price the defects like a claim, because it may become one:

List each item specifically.
Put a repair figure against each, a written quote from another trade is the gold standard; benchmarked figures from the Cost Index and day rates serve for smaller items.
Add a modest margin for investigation where the extent is unclear (opening up a suspect area).
Withhold that total; pay the rest on time.

Paying the undisputed balance promptly is tactically vital: it demonstrates good faith, keeps you the reasonable party in the file, and removes the builder’s counter-narrative (“they just don’t want to pay”).

Put it in writing: always

Withholding without explanation is indistinguishable from not paying. Send, before or with the due date:

“Of your final invoice of £11,400, I am paying £8,650 today. I am withholding £2,750 in respect of the attached list of defective/incomplete items, calculated as shown. This will be released on satisfactory completion of those items.”

Where your contract has a pay less notice mechanism, this letter is it, served within the contract’s stated timescales, which matter: miss the notice window on a contract that has one and you may owe the full sum notified regardless of the defects (you’d claim them separately instead). The statutory payment rules in the Construction Act, including its pay less notices, do not apply to a building contract with a homeowner who lives in the property, so for most homeowners a notice deadline exists only if the contract itself creates one.³ JCT, for example, says its Home Owner contract is excluded from the provisions of the Construction Act.⁴ Check your contract’s payment clause before the due date, not after.

Where withholding goes wrong

The silent freeze, no notice, no breakdown. Reads as breach, invites a claim, loses the moral high ground.
The total freeze, withholding everything over partial problems. Same result.
Manufactured snags, inflating a list to engineer a discount. Adjudicators and judges see a great many of these and price them accordingly.
Withholding against the wrong entity, on jobs with separate trades, hold money only from the contract the defect belongs to.
Forgetting the retention, if your contract already holds a retention, that’s your first recourse for snagging; withholding stacks on top only for matters beyond it.

What happens next

A withholding notice usually triggers one of three things: the builder fixes the items (the common case, money is the only language some disputes speak); negotiation toward a settled figure (fine, in writing, “full and final”); or escalation. If they threaten court, your notice, your list and your quotes are your defence file; if they threaten to “send the boys” or place a lien on nothing in particular, that tells you what you’re dealing with, stay written, stay calm, and follow the escalation ladder.

And if the boot is on the other foot, the work is fine and you simply can’t pay yet, none of this applies. Talk to the builder; silence converts a cash-flow problem into a dispute.

This guide is general information for homeowners in England and Wales, not legal advice.

References (4)

Figures in this note were checked against the sources below on 30 September 2026. Superscript numbers in the text point to them. Every source the site cites, by topic.

1technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-ZQCZ3ZSection 54(3) gives the consumer two statutory remedies where the service does not conform to the contract: the right to require repeat performance under section 55 and the right to a price reduction under section 56. Section 54(4) gives a price reduction where the trader breaches a section 50 term that does not relate to the service itself, and section 54(5) gives a price reduction for breach of the section 52 reasonable time requirement. Crucially section 54(6) preserves other remedies instead of or in addition to these, provided the consumer does not recover twice for the same loss, and section 54(7) lists them: claiming damages, recovering money paid where the consideration has failed, specific performance, specific implement, relying on the breach against the trader's own claim under the contract, and treating the contract as at an end. Section 54(1) confirms these rights do not displace consistent contractual rights.
2technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-CPGOMASection 56(1) gives the consumer the right to require the trader to reduce the price by an appropriate amount, including a refund of anything already paid above the reduced amount, and section 56(2) allows the reduction to be the full price where appropriate. Section 56(3) restricts the choice: a consumer who also has the right to repeat performance may only take a price reduction where repeat performance is impossible under section 55(3), or where the consumer required repeat performance and the trader failed to do it within a reasonable time and without significant inconvenience. Section 56(4) requires any refund without undue delay and in any event within 14 days beginning with the day the trader agrees the consumer is entitled to it, section 56(5) requires the same means of payment unless the consumer expressly agrees otherwise, and section 56(6) forbids any fee for making the refund.
3technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-5Q1UW1Section 106(1)(a) disapplies Part II of the Act, which contains the statutory adjudication and payment provisions, to a construction contract with a residential occupier. Section 106(2) defines that as a construction contract principally relating to operations on a dwelling which one of the parties occupies or intends to occupy as his residence, with 'dwelling' meaning a dwelling-house or a flat; a dwelling-house does not include a building containing a flat, and a flat means separate self-contained residential premises divided horizontally from another part of the building. Section 106(3) and 106(4) let the Secretary of State amend the definition only by order approved by a resolution of each House. This is the provision that explains why a homeowner has no automatic statutory right to adjudicate against a builder, and why adjudication is only available if the contract itself provides for it.
4technicalstrongThe Joint Contracts Tribunal, guidance.RN-267X3CJCT's product page for its homeowner building contract. It says the contract is for a homeowner dealing directly with the contractor and suits small domestic work such as extensions.