Builders in the United Kingdom

18,481 builders across the United Kingdom, each compared on their portfolio, credential evidence, past work and reviews: the evidence that matters before a project you'll live with. Add your area below to compare their work near you.

No ads · No paid placement · Ranked on evidence only

Builders

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What to check when hiring builders in the United Kingdom

MyTrustedTraders ranks on independent public evidence. No ads, no paid placement. Use these checks alongside the evidence on each profile before you decide who to contact.

  • Never pay a large deposit up front. Agree a staged payment schedule tied to completed milestones, and hold a small retention until snagging is done.
  • Get it in writing: an itemised quote with scope, materials, start and finish dates, and how any changes (variations) will be priced.
  • Be wary of a cash-only price or pressure to start tomorrow. Both are red flags for an unaccountable job.
  • Ask to see a portfolio of completed work like yours, plus recent references you can contact.
  • Check the credentials and registrations that matter for this work, and that they are current.

Which credentials should a builder have? See the guide →

How to judge a builder

Independent, no-ads guidance. The trade-specific checks that matter most, the warning signs, and what to ask before you hire. Use it alongside each trader’s public evidence above.

Verify before you hire

  • Check the builder holds current FMB (Federation of Master Builders) membership: they're independently site-inspected and vetted each year.
  • Confirm the builder will arrange building-control inspections and hand you a completion certificate at the end.
  • Ask for the company name, then check it on Companies House: look at how long they've been trading and whether directors have a history of failed companies.
  • Verify they hold public liability insurance of at least £1 million before anyone sets foot on site.

Warning signs of a cowboy

  • They ask for a large upfront deposit (more than 10–15%) or demand cash with no paperwork trail.
  • They can't name their building-control inspector or say you don't need one for the work.
  • The company was registered recently or the director has been linked to multiple dissolved companies.
  • They pressure you to decide immediately or won't give you a detailed written quote.

Questions to ask before you hire

  • Can I see photos from a similar completed project, such as an extension or loft conversion, and speak to that client?
  • Who will be your building-control inspector, and will I receive a completion certificate when the work is done?
  • Are you a current FMB member or registered with TrustMark, and can I verify that online?
  • What happens if you go bust mid-project: do you carry deposit-protection insurance or offer a structural warranty?

Frequently asked questions

How do I choose a trustworthy builder?
Compare the public evidence on each profile: how many independent reviews they have and across how many named sources, the rating and how recent it is, any credential evidence, and the company status. A builder backed by several named sources is harder to fake than one found in only one place.
Does MyTrustedTraders rank or recommend builders for payment?
No. There are no ads and no paid placement. Builders are ranked only by the strength of independent public evidence. No one can pay to rank higher, add a badge, or change their reviews.
Where do the reviews come from?
They're imported from named public review sources and always shown with the source named. They aren't reviews written on MyTrustedTraders. We cross-check the same business across sources rather than creating new reviews.
What should I check before hiring a builder?
Confirm credentials and insurance directly with the builder, get a written quote, and run the Cowboy Checker on the business first. MyTrustedTraders helps you shortlist on the evidence. It doesn't replace your own checks before you hire.

More ways to check who to trust

Free, independent checks. No ads, no paid placement.

  • Cowboy Checker

    Spot the warning signs of a dishonest business before you hire.

  • Company Health Check

    Check whether the company behind a business is active, dissolved, or in liquidation.

  • Licence Check

    A licence number from a van or quote, checked against every public register included here in one search.

Or browse traders by tradeAll checks and tools

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