When you hire a builder, you enter into a legally binding contract — whether or not a single word was written down. If your builder has failed to complete the work, charged more than agreed, done the job badly, or simply disappeared with your deposit, they have breached that contract. This guide explains what your rights are, what you can claim, and how to take them to court.
The short answer: Yes, you can sue. Builder contracts are governed by the Consumer Rights Act 2015 and the Supply of Goods and Services Act 1982. The work must be done with reasonable care and skill, within a reasonable time, and at the agreed price. Failure on any of these counts is a breach.
What Is a Building Contract?
A contract exists whenever there is an offer, acceptance, and consideration (payment or promise of payment) between two parties. For builder disputes, the contract is typically formed when:
- You accept a written quote from the builder
- You agree on price and scope verbally and work begins
- You exchange emails or messages agreeing on the job
- You sign a formal contract document
You do not need a formal written contract to have legal rights. A builder who agreed to tile your bathroom for £800 and abandoned the job halfway through has breached a contract — even if nothing was signed.
Implied Terms the Law Adds Automatically
Under the Consumer Rights Act 2015 and Supply of Goods and Services Act 1982, every contract for building or trade services automatically includes these implied terms, regardless of what was written:
- Reasonable care and skill — the work must meet the standard of a competent tradesperson in that field
- Reasonable time — work must be completed within a reasonable period if no deadline was agreed
- Reasonable price — if no price was fixed in advance, you only have to pay a reasonable amount
- Materials of satisfactory quality — any materials supplied as part of the job must be fit for purpose
Builder Breached the Contract?
JustClaim generates your letter before action and N1 court form automatically. Most builders settle when they receive a formal legal letter.
Types of Breach of Contract
Total Breach (Abandonment)
The builder stops work entirely — either disappearing, refusing to return, or explicitly saying they won't finish. This is the clearest type of breach. You are entitled to treat the contract as terminated, get your deposit back, and claim for the cost of engaging another builder to complete the work.
Partial Breach (Defective or Incomplete Work)
The builder completes the job but leaves it unfinished, does parts of it badly, or fails to meet the agreed specification. The contract isn't entirely broken — some work was done — but you suffered a loss. You can claim the cost of remedial works, or the difference in value between what was promised and what was delivered.
Anticipatory Breach
The builder tells you before the agreed completion date that they won't be finishing the job. You don't have to wait — you can treat this as an immediate breach, terminate the contract, and start your claim straight away.
Overcharging Beyond the Agreed Price
A builder who charges significantly more than the agreed quote — particularly when the scope of work hasn't changed — is in breach of the price term. You only have to pay the agreed amount, plus any genuinely agreed variations. Invoices presented after the fact for extras that were never discussed are not legally enforceable.
What You Can Claim
The principle in contract law is to put you in the position you would have been in had the contract been performed properly. In building disputes, your losses typically include:
- Cost of remedial works — quotes from another builder to fix or complete what was agreed
- Deposit or payments made — money paid to the builder that wasn't earned
- Diminution in value — the reduction in your property's value caused by the defective work
- Alternative accommodation — if the botched work made your home uninhabitable
- Professional inspection fees — surveyor or engineer's report to evidence the defects
- Consequential losses — for example, if a leaking roof caused water damage to furniture or electrics
- Interest at 8% per year — statutory interest from the date of breach to judgment
Small claims limit: The small claims track covers claims up to £10,000. For disputes above £10,000 you move to the fast track which has more complex procedures — but for most domestic builder disputes, small claims is the right route.
Written Contract vs Verbal Agreement
If You Have a Written Contract or Quote
A signed contract or accepted written quote is the strongest foundation for your claim. The document sets out exactly what was agreed — scope, price, timeline. Any deviation from it is evidence of breach. Keep the original quote, any variation orders, and all correspondence.
If You Only Have a Verbal Agreement
Verbal contracts are fully enforceable in English law. Your evidence will be circumstantial: text messages, WhatsApp messages, emails, bank transfer records, witness statements from anyone present when the agreement was made. The more documentation you have, the stronger your case — but courts do accept oral contract claims regularly.
No Contract At All: Quantum Meruit
If there was no clear agreement on price or scope, you may have a quantum meruit claim — a right to pay only a fair and reasonable amount for what was actually delivered. This also means the builder is only entitled to payment proportionate to the value of work properly completed. If they did £2,000 of a £5,000 job before walking off, they may be entitled to nothing if the work was defective.
Not Sure What You Can Claim?
JustClaim's AI walks you through your specific situation, calculates your losses, and generates the legal documents. Takes 5 minutes.
Step-by-Step: How to Sue a Builder for Breach of Contract
Gather evidence
Photograph all defects. Keep every message, quote, invoice, and payment record. Get remedial quotes from other builders.
Letter before action
Write formally to the builder stating the breach, what you want (refund/remedial works), and give 14 days to respond.
File N1 claim
If no resolution, file in the county court. Claims under £10,000 go to the small claims track — no lawyers needed.
Hearing or default
94% of claims result in default judgment — the defendant doesn't respond. If defended, a short informal hearing decides it.
The Letter Before Action
Before filing a claim, you must send the builder a formal letter before action — the court expects this. The letter should state:
- The specific breach (what they did or failed to do)
- The financial loss you have suffered
- What you require — refund, completion of works, or payment for remedial works
- A deadline of 14 days to respond
- That you will issue court proceedings if they do not respond
Send it by recorded delivery and keep the receipt. If the builder ignores it or refuses, you can file your N1 claim immediately.
What If the Builder Is a Limited Company?
Many builders operate through limited companies — a separate legal entity that limits their personal liability. If the company has enough assets to satisfy a judgment, you sue the company. If it's been dissolved or has no assets, you have harder options:
- Public liability insurance — claim directly against their insurer if the work caused damage
- Personal liability of directors — if directors acted fraudulently or wrongfully took money knowing the company couldn't deliver, they can be personally liable
- Trading Standards — report the company for criminal fraud if they took deposits with no intention of completing
If the builder traded as a sole trader (not a company), they are personally liable for the full debt — it follows them regardless of whether they're still trading.
Defences Builders Commonly Raise
Know what to expect. Common builder defences include:
- “You changed the specification” — counter with original quote and any documented variations
- “You didn't pay on time so I stopped work” — if you withheld payment due to defects, this is usually a legitimate set-off
- “The defects were caused by existing problems” — independent surveyor report counters this
- “I completed the contract — you're just being difficult” — photos dated at time of defect discovery are your key evidence
- “We had a verbal agreement to vary the price” — courts require evidence of any agreed variations
94% of small claims result in default judgment. Most builders either ignore the claim or settle when they realise the claimant is serious. A formal letter before action settles many disputes before they reach court.
Time Limits
You have 6 years from the date of breach to bring a claim in the county court (5 years in Scotland). For latent defects — problems that weren't apparent at first, like subsidence caused by poor foundations — time runs from when you discovered or ought reasonably to have discovered the defect.
Despite the 6-year limit, act quickly. Evidence degrades. Builders move address or dissolve companies. Witnesses become harder to locate. The sooner you act, the stronger your position.
Frequently Asked Questions
Can I sue a builder for breach of contract?
Yes. If your builder failed to complete work, did it to a substandard level, overcharged, or abandoned the project, they have breached your contract. You can sue in the small claims court for up to £10,000 without a solicitor.
Do I need a written contract to sue a builder?
No. Verbal agreements are legally binding contracts in England and Wales. Text messages, emails, and payment records all serve as evidence. Written contracts simply make it easier to prove what was agreed.
What can I claim if a builder breaches the contract?
You can claim the cost of remedial works, money paid that wasn't earned, the difference in value between what was promised and what was delivered, alternative accommodation if your home was uninhabitable, inspection fees, and statutory interest at 8% per year.
How long do I have to sue a builder?
6 years from the date of breach in England and Wales (5 years in Scotland). For latent defects discovered later, time runs from when you found or should have found the problem. Act as quickly as possible while evidence is fresh.
What if my builder has gone limited or insolvent?
If the company has assets, sue the company. If it's dissolved, consider a claim against their public liability insurer, or against directors personally if they acted fraudulently. Sole traders are personally liable regardless of whether they're still trading.
Do I need a solicitor to sue a builder?
No. The small claims track is designed for people to represent themselves. JustClaim generates your letter before action and N1 claim form — you don't need a lawyer, and solicitor fees are not recoverable from the other side anyway in small claims.