Can I Withhold Payment From My Builder for Poor Workmanship?

You've paid for a professional job. The work's finished, but it's not right. Tiles are uneven, paintwork's patchy, or something just doesn't look like it was done by someone who knew what they were doing.

Can you withhold payment? In short: yes, but only proportionately, and only after you've given your builder a chance to put it right.

Here's what the law actually says, and what you should do before you hold back any money.

What Does UK Law Say About Poor Workmanship?

Under the Consumer Rights Act 2015, when you hire a tradesperson, the law says the service must be provided:

• With reasonable care and skill
• Within a reasonable time (if no time was agreed)
• For a reasonable price (if no price was agreed)

If the work hasn't been done with reasonable care and skill — meaning it's not up to the standard you'd expect from a competent tradesperson — you have the right to a remedy.

That remedy is usually: ask the trader to redo the work or fix the defects, at no extra cost to you. If they refuse or can't fix it, you can hire someone else to put it right and claim the cost.

So Can I Just Refuse to Pay?

Not the whole amount. This is the bit people get wrong.

Let's say the builder did £10,000 worth of work. £9,000 of it is fine. £1,000 of it is shoddy and needs redoing.

You can't refuse to pay the full £10,000. You can withhold a proportionate amount — in this case, roughly £1,000, or the amount it would cost to fix the defects.

If you withhold more than is reasonable, you could be in breach of contract. That puts you in a worse position if it ends up in court.

The Right Way to Handle Poor Workmanship

If you think the work isn't up to scratch, here's what you should do:

1. Document the issues. Take photos, make a list, be specific. "The grouting is uneven in the bathroom" is more useful than "it looks rubbish."
2. Tell your builder in writing. Email or text. List the specific defects and ask them to fix them within a reasonable time (7-14 days is typical).
3. Give them a chance to remedy it. Most builders will come back and sort out genuine issues. They don't want a bad review or a dispute any more than you do.
4. If they refuse or fail to fix it, get quotes to have it remedied. This establishes what a proportionate withholding would be.
5. Withhold only the proportionate amount. Pay the rest. Keep all records.

This keeps you on solid ground. If it escalates, you can show you acted reasonably.

What If There's a Defects Clause in the Contract?

If you've got a written contract with a defects clause (sometimes called a snagging or remediation clause), the process is even clearer.

A good defects clause will say:

• How defects should be reported (usually in writing)
• How long the builder has to fix them (typically 7-14 days)
• What happens if they don't fix them (you can hire someone else and deduct the cost)

This removes ambiguity. Both sides know the process. The builder knows they'll get a chance to fix issues. You know you're protected if they don't.

A clear defects clause is one of the best tools for avoiding this type of dispute. It sets expectations before the job even starts.

For a deeper look at snagging — what counts as finished, how retention works, and how to resolve end-of-job disagreements — see our guide on snagging disputes and what counts as finished.

What Counts as "Poor Workmanship"?

This isn't about personal taste. It's about whether the work meets the standard of a reasonably competent tradesperson.

Examples of poor workmanship:

• Tiling that's visibly uneven or has lippage
• Plasterwork with lumps, ripples, or visible joins
• Paintwork with runs, missed spots, or paint on fixtures
• Pipework that leaks or isn't secure
• Electrics that don't comply with regulations

If a qualified tradesperson would look at it and say "that's not right," it's poor workmanship.

If it's just not to your taste — you wanted a slightly different shade, or you've changed your mind about the layout — that's not poor workmanship. That's a variation, and you'd need to pay for changes.

What If the Builder Threatens Legal Action?

If you've withheld a proportionate amount, documented everything, and given them a chance to remedy the defects, you're on solid ground.

Keep all your records: photos of the defects, copies of your emails, quotes from other traders to fix the work. If it goes to small claims court, the judge will want to see that you acted reasonably.

The Bottom Line

You're not stuck. If the work genuinely isn't up to standard, you have rights under consumer law. But you can't just refuse to pay everything — you need to be proportionate, give the builder a chance to fix it, and document the process. This is one of the reasons why having a written contract matters — it sets out the process for handling defects before the situation arises.

And if you're starting a new project? A contract with a clear defects clause prevents this standoff — and it protects your builder too. See how TradeContract makes this simple.