Find affordable extension builders
- Trusted, recommended Extension Builders
- Prices for extension builders in the UK
- Find a local builder who can convert your loft or build a side return extension at a great price
- Find out how much extension builder jobs cost
| Low | Average | High |
|---|---|---|
| £13 | £34 | £68 |
| Average hourly rate of 9079 extension builders in the UK excluding VAT or callout charge | ||
Extension Builders in the UK. The average hourly rate of the 10 Extension Builders listed is £30. Extension Builder rates vary with location. For example, R L MITCHELL BUILDING SERVICES in Badgeworth charges from £32 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.

Trusted, recommended Extension Builders
R L MITCHELL BUILDING SERVICES
R L MITCHELL BUILDING SERVICES is an established and experienced local extension builder in Badgeworth. Please contact us for a free, no obligation...
"RSJ installation" - SHEFFIELD, job posted 08/07/25
Martin Fry Roofing & Building Contractors
Experienced extension builder ready to quote for your work. Martin Fry Roofing & Building Contractors is the best extension builder in Prestbury. N...
"Job Title: House Extension & Internal Renovation – Warwick (CV34) Description: We are looking for an experienced and reliable builder or construction team for renovation and extension work on a semi-detached house in Warwick (CV34). The property has a completed ground floor extension, and we..." - CV34, job posted 07/07/25
WEYMOUTH ROOFING CO.
WEYMOUTH ROOFING CO. is an established and experienced local extension builder in Weymouth. Please contact us for a free, no obligation quote and c...
"Hip to gable loft conversion" - COLCHESTER, job posted 07/07/25
CB Home Improvements, Roofing & Building Solutions
Need to find an Extension Builder near you for all your extension buildering work?
CB Home Improvements, Roofing & Building Solutions provi...
"RSJ installation" - DD11, job posted 07/07/25
DIRECT BUILD T/A
Need to find an Extension Builder near you for all your extension buildering work?
DIRECT BUILD T/A provides a local, trusted extension bui...
"Single storey extension" - EPPING FOREST, job posted 07/07/25
LA Landscapes
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Single storey extension" - , job posted 07/07/25
Lennon Biulders
Lennon Biulders is an established extension buildering business in Prestbury. We come highly recommended and provide competitive quotes for your wo...
"We are looking for a builder to renew support beams in our cellar" - WALSALL, job posted 06/07/25
Deacon Builders Ltd
Deacon Builders Ltd is an established and experienced local extension builder in Caudle Green. Please contact us for a free, no obligation quote an...
"A loft conversion or second story on our current ground floor extension." - HU7 4, job posted 06/07/25
FOUR SEASONS PROPERTY SERVICES
Charles O’Neill
Relax... you have found a reliable extension builder in Cheltenham. FOUR SEASONS PROPERTY SERVICES is a friendly and reliable company based in Chel...
"Single storey extension" - LE3, job posted 06/07/25
WILD CONSTRUCTION LTD
Experienced extension builder ready to quote for your work. WILD CONSTRUCTION LTD is the best extension builder in Allington. No obligation free qu...
"Single storey extension" - LEICESTER, job posted 06/07/25
from 160 to 170 of 9079
Find out how much extension builder jobs cost
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.




















