Extensions / renovation contractors in the United Kingdom

Extensions / Renovation Contractors

0 extensions / renovation contractors found

Save search

No extensions / renovation contractors listed yet

We haven't added extensions / renovation contractors yet. We're expanding coverage across the United Kingdom. Browse all trades, or check back soon.

Browse all trades

Find extensions / renovation contractors across the United Kingdom, each compared on their portfolio, verified credentials, 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.

Find an extension / renovation contractor by where they’ve actually worked

See which extensions / renovation contractors have real planning history near you — application volumes, approval rates, and the kinds of work they handle (loft conversions, extensions, basements), straight from public planning applications. Browse by council, or by your postcode.

Approval rates →By postcode →By council →

Find extensions / renovation contractors in the United Kingdom

Browse by area:

Related trades

Not quite the trade you need? Compare these on the same public evidence:

What to check when hiring extensions / renovation contractors 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.

  • 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.
  • Get a written, itemised quote with scope, assumptions and a staged payment schedule.
  • Compare at least three extensions / renovation contractors on the depth of their evidence, not just price.

Which credentials should an extension / renovation contractor have? See the guide →

How to judge an extension / renovation contractor

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 contractor is a Federation of Master Builders (FMB) member — they require an independent site inspection, credit check, and insurance verification before joining.
  • Confirm they will obtain building regulations approval and hand you the completion certificate when finished — without one, your home can become unmortgageable and unsellable.
  • Look up the company on Companies House to check it has traded for several years and that the directors are not linked to dissolved construction firms.
  • Ask for a structural warranty (NHBC, LABC Warranty, or Premier Guarantee) on any structural work — mortgage lenders require it and it covers major defects for ten years.

Warning signs of a cowboy

  • Asks for a large upfront deposit with nothing signed — extension contractors typically need 10–25% for materials, but only once a clear written contract with a payment schedule is in place.
  • Cannot show completed project photos or provide references from comparable-scale jobs — portfolio is the primary proof of capability for this kind of work.
  • The company was incorporated in the last year or two, or the director is linked to previously dissolved construction companies — a classic sign of phoenix-company risk.
  • Dismisses building regulations as optional or says you can 'sort the certificate later' — this is never true for structural or extension work.

Questions to ask before you hire

  • Can you give me the building regulations approval reference, and will you hand over the completion certificate at the end?
  • Are you an FMB member, and can you show me your current public liability insurance certificate?
  • Which structural warranty provider are you registered with, and will this project be covered by a ten-year warranty?
  • Can I have a fixed-price contract with a detailed payment schedule tied to stages of work, rather than paying in advance?

Frequently asked questions

How do I choose a trustworthy extension / renovation contractor?
Compare the public evidence on each profile — how many independent reviews they have and across how many named platforms, the rating and how recent it is, any verified credentials, and the company record. An extension / renovation contractor backed by several named sources is harder to fake than one with a single listing.
Does MyTrustedTraders rank or recommend extensions / renovation contractors for payment?
No. There are no ads and no paid placement. Extensions / renovation contractors 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 platforms 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 an extension / renovation contractor?
Confirm credentials and insurance directly with the extension / renovation contractor, 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.

Or browse tradespeople by trade