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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 9082 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 £45. Extension Builder rates vary with location. For example, Dub Solutions in Windsor charges from £38 per hour.

When hiring Extension Builders in the UK get multiple quote to compare prices and services.

Basement Garage House extension Loft Side return

Trusted, recommended Extension Builders

"Dormer loft conversion" - LUTON, job posted 08/04/25

"Two storey extension" - LEEDS, job posted 08/04/25

"Kitchen extension" - MILTON KEYNES, job posted 08/04/25

"Loft conversion" - SHEFFIELD, job posted 06/04/25

"Loft conversion" - COVENTRY, job posted 06/04/25

"Underpinning" - ACCRINGTON, job posted 06/04/25

"Loft conversion" - WEST WICKAM, job posted 06/04/25

"Single storey extension" - SOUTHPORT, job posted 05/04/25

"Single storey extension" - , job posted 05/04/25

"Loft conversion" - HOVE, job posted 05/04/25

from 210 to 220 of 9082

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.