Contractor walked off mid-job? Your rights and remedies under UK law.

You signed an agreement with a contractor for a project in your house. The project started and was progressing well. You paid the first invoice on time, but then you noticed things slowing down and delays creeping in. Materials or tools failed to arrive as scheduled. Then the builder ceased communication with you.

You are left with a half-completed project, often having run out of money, sometimes with a property that is uninhabitable.

This could be classed as abandonment or repudiatory breach, entitling you to terminate the contract, replace the contractor, and recover damages.

This article is for homeowners in England and Wales who engaged the contractor as a consumer. If you would rather have a vetted UK construction-disputes solicitor review the contract, the payment trail, and the state of the works and tell you exactly where you stand, skip to the bottom. It costs you nothing.

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What you may be entitled to recover for breach of contract

When a contractor abandons a job, you're entitled to recover the additional cost for getting the work finished to the standard you originally asked for. However, it can't be any more than that.

You are not entitled to double recovery. The calculation matters. You should discuss the calculation with your solicitor

The primary measure of damages for abandonment is the cost of completion: what it takes, in money, to put you in the position you would have been in had the contract been performed.

In practice, that is calculated as:

(Reasonable cost of completing the works to the contractual standard) minus (Unpaid contract balance you would otherwise have paid the original contractor) plus (Any other reasonably foreseeable losses) minus (Any value the original contractor has properly provided that is chargeable).

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The duty to mitigate

There is a general duty to mitigate your losses. You cannot recover losses you could reasonably have avoided. In abandonment cases the duty is concrete: get reasonable replacement quotes, make the site safe, and move things forward.

You also need to act promptly. Leaving a half-finished site for six months because you cannot decide what to do next accumulates losses that are difficult to recover later.

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Contractors vs subcontractors

If the main contractor has disappeared and a subcontractor turns up demanding cash, politely decline, take their details, and refer them to the main contractor. You are not in privity of contract with the subcontractor and you should not pay twice for the same work.

These approaches are, however, useful evidence. A chorus of unpaid subcontractors is strong evidence of the main contractor's insolvency or poor business practices, and can support both your claim and any complaint to the Insolvency Service.

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What to do next

• Contact a solicitor as soon as possible to protect your position. Early advice usually saves significant time and money.
• Document the site and situation. Photographs, dated, of every room and every defect. Keep your contract, variations, invoices, and all correspondence in one place.
• Inventory materials on site. Note what is there, whose it is, and what state it is in. Cross-reference against invoices for materials you have already paid for.

A solicitor can then advise on termination, recovery of losses, and can liaise with the contractor on your behalf, including on disputes over liquidated damages, retention, and payment notices.

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Frequently asked

The contractor is now saying they want to come back. Take advice before responding. The wrong reply can waive your right to treat the contract as terminated.

The contractor's company has been dissolved. See the companion article on dissolved contractor companies.

Do I have to use a solicitor? For construction disputes, which can be procedurally complex, it is recommended you seek legal advice as early as possible to protect your position. Construction litigation is procedurally specific and missteps are costly.

How long do I have to bring a claim? Generally six years from the date of breach in England and Wales, though shorter limits can apply depending on the type of loss and any contractual provisions.

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Important

This article is general guidance on UK construction and consumer law and is not legal advice for your specific case. Statutory references are correct as of the date at the top. If you would like a vetted UK construction-disputes solicitor to look at your specific facts, at no cost to you, contact us today to arrange a confidential review with a qualified legal professional.