# Federation of Master Builders

The UK's largest trade association for small and medium building firms. FMB members are independently inspected before joining and agree to a code of practice.

- Type: Trade association
- Traders with an FMB entry in the public data we track: 5,259
- Data collected up to: 14 Jul 2026
- Official register: https://www.fmb.org.uk/find-a-builder/
- Page: https://mytrustedtraders.com/certifications/federation-of-master-builders

Counts reflect collected public entries, not official membership totals. Absence from this data does not mean a trader is unregistered.

## Where holders are

- London: 94
- Cardiff: 10
- RG1: 9
- BR1: 9
- PO1: 8
- UB1: 8
- Wembley: 7
- Gerrards Cross: 7
- Manchester: 7

## Trades that hold it

- Builder: 3,066
- Bricklayer / mason: 1,148
- Roofer: 153
- Damp proofing / waterproofing: 10
- Plasterer / drywaller: 9
- Carpenter / joiner: 9
- Landscaper: 9
- Plumber: 9

## FMB holders with review evidence

A slice of holders that also have customer reviews on MyTrustedTraders. This is not the register itself.

- **Castle Windows (Newbury) Limited**: window company · Reading · 1,069 reviews. https://mytrustedtraders.com/traders/castle-windows-newbury-limited-2
- **Kinson & Birch Ltd**: roofer · Hammersmith and Fulham · 714 reviews. https://mytrustedtraders.com/traders/kinson-birch-ltd-2
- **Imperial Residential Building & Roofing Limited**: roofer · West Midlands · 626 reviews. https://mytrustedtraders.com/traders/imperial-residential-building-roofing-limited-2
- **Merstham Glass Limited**: builder · Redhill · 525 reviews. https://mytrustedtraders.com/traders/merstham-glass-limited-2
- **LM Quin Construction Ltd**: builder · Thame, Oxford · 425 reviews. https://mytrustedtraders.com/traders/lm-quin-construction-ltd-2
- **Michael Kavanagh Building & Roofing Services**: roofer · Coventry West Midlands · 408 reviews. https://mytrustedtraders.com/traders/michael-kavanagh-building-roofing-services-lead-ro
- **PBH Garage Doors Limited**: garage door · Bexley · 367 reviews. https://mytrustedtraders.com/traders/pbh-garage-doors-limited-2
- **Celtic Property Maintenance Services Limited**: gardener landscaper · Cardiff · 279 reviews. https://mytrustedtraders.com/traders/celtic-property-maintenance-services-limited
- **ABT Roofing And Home Improvements Ltd**: roofer · Morden, Merton · 267 reviews. https://mytrustedtraders.com/traders/abt-roofing-and-home-improvements-ltd-2
- **Kenway Ltd**: builder · Romford, Havering · 259 reviews. https://mytrustedtraders.com/traders/kenway-ltd-2
- **W E Cox & Sons Limited**: roofer · Bournemouth · 253 reviews. https://mytrustedtraders.com/traders/w-e-cox-sons-limited
- **Clarkes of Brighton**: builder · Brighton · 230 reviews. https://mytrustedtraders.com/traders/clarkes-of-brighton

## Common questions

### What is Federation of Master Builders?

The UK's largest trade association for small and medium building firms. FMB members are independently inspected before joining and agree to a code of practice. (Trade association.)

### How many traders hold Federation of Master Builders?

We track 5,259 traders with a Federation of Master Builders entry, based on register and listing data collected up to 14 Jul 2026. This reflects the public entries we have collected, not necessarily the scheme's complete membership.

### How do I check whether a specific trader holds Federation of Master Builders?

Check the official register at https://www.fmb.org.uk/find-a-builder/, or look the trader up on MyTrustedTraders. Profiles show the credentials we have found for them, alongside reviews and other public evidence.