Extensions and conversions

Use our Find a builder search to find good local builders. FMB members are checked and inspected at the point of joining, and can offer you a contract on your work assuring you of a better building experience.
  • Independently vetted
  • Customer reviews
  • Case studies
  • Insurance

Or search for a member by name

  1. You're here:
  2. Homepage
  3. Find a Builder
  4. Extensions and conversions

Trusted builders

Here is a selection of reliable builders experienced in converting properties and building extensions located across the United Kingdom. If you're looking for local builders near to you, please enter your location into the form field above to refine your search. Find out what to look for when choosing a builder and how to ensure your building project is a success in our Ultimate guides. 

Load more builders

Get inspired

Why use a Master Builder?

At the FMB, we connect clients with quality, local builders they can trust.

Master Builders are committed to high standards and their membership of the FMB must be earned. Members have to pass a professional vetting and independent inspection process before joining to ensure they meet the high standards expected of a Master Builder company. 

Why choose a Master Builder?