Builder left the job half-done or done badly?

Reasonable care and skill is the legal floor. Speak to Kestrel.

The short answer

Building work must be carried out with reasonable care and skill, in reasonable time, and at a reasonable price where none was fixed. Defective work must be put right or paid for; an abandoned job entitles you to the cost of completion by others. The winning moves are an independent report, one written chance to fix, and a claim built on the difference between what was promised and what stands in your house.

The law, in plain English

The Consumer Rights Act implies into every consumer building contract that the service is performed with reasonable care and skill. Work falling short must be redone at no extra cost or, where that is impossible or the trust has gone, compensated by the cost of another contractor putting it right. Materials must also be of satisfactory quality.

Where no time was agreed, work must finish in a reasonable time; abandonment is a breach entitling you to complete elsewhere and claim the difference. A quote generally binds as the price; an estimate is a genuine forecast that cannot quietly double without agreement. Substantial deposits are recoverable where nothing or little was delivered.

Two force multipliers: deposits or stage payments made on a credit card can engage section 75 against the card issuer for the whole loss on qualifying sums, and membership of trade schemes can offer ADR. Structural danger changes the register entirely: building control and an engineer come before letters.

Guide edition: August 2026. General information for England and Wales. Current law and your particular facts require assessment before action.

How it usually goes

1
Freeze the evidence

Photograph and video everything before anyone touches it. Keep the quote, invoices, messages and payment records together.

2
Independent report

A surveyor or independent tradesperson lists defects and prices remediation. This document runs the whole case.

3
One written chance, or straight to money

Where trust survives: a letter requiring specified fixes by a date. Where it does not: a letter before claim for the remediation cost.

4
Recover through the strongest channel

Card issuer under section 75, trade scheme ADR, or the county court. Most builder disputes settle when the report and the letter arrive together.

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What you'll need

Time limits

Deadlines matter here.

Six years from the breach for contract claims. Card chargeback windows are far shorter. Danger to the structure is a today problem: safety first, then the paper war.

Scope and fees

The proposed Business plan covers routine commercial contracts and business letters. This reference guide may concern work outside that pilot. Any future legal engagement will confirm the service, responsible lawyer, fees and third-party costs in writing.

About this guide

This guide concerns Consumer disputes. It forms part of our reference library. Kestrel is preparing for SRA authorisation. See practice details for the proposed service and current availability.

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Common questions

The builder has stopped answering and the job is half-done.

Abandonment is breach. Document the state of the works, get completion priced independently, and claim the extra cost of finishing over the original price, plus losses the delay caused.

He demands more than the quote before continuing.

A quote is generally the price. Extras only bind where genuinely instructed, and mid-job price pressure on a part-paid project is a recognised tactic, not a right. Put the position in writing before paying another pound.

The work looks fine to me but feels wrong. Am I overreacting?

That instinct is what the independent report answers. Hidden defects, missing membranes, undersized joists, unsafe electrics, are the expensive kind. A few hundred pounds of survey routinely finds the case or ends the worry.

I paid the deposit by credit card.

On qualifying amounts, section 75 makes the card issuer jointly liable for the builder's breach, reachable even if he has vanished or folded. Claim to the issuer in writing with the report attached.

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