Extensions / renovation contractors in the United Kingdom
Extensions / Renovation Contractors
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We haven't added extensions / renovation contractors yet. We're expanding coverage across the United Kingdom. Browse all trades, or check back soon.
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.
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.
Find extensions / renovation contractors in the United Kingdom
Browse by area:
- Extensions / renovation contractors in London
- Extensions / renovation contractors in Manchester
- Extensions / renovation contractors in Birmingham
- Extensions / renovation contractors in Leeds
- Extensions / renovation contractors in Glasgow
- Extensions / renovation contractors in Bristol
- Extensions / renovation contractors in Edinburgh
- Extensions / renovation contractors in Sheffield
- Extensions / renovation contractors in Liverpool
- Extensions / renovation contractors in Cardiff
- Extensions / renovation contractors in Leicester
- Extensions / renovation contractors in Nottingham
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.
- Trade Credential Guide
Which official register to check for each trade — and how to verify it.
- Cowboy Checker
Spot the warning signs of a rogue trader before you hire.
- Council Experience
Which architects and agents know your local council.
- Planning Approval Rate
How often a firm's planning applications get approved.
- Planning Finder
Planning applications and the architects behind them, by postcode.