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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 £37. Extension Builder rates vary with location. For example, Col-In the Builder in Irvine charges from £35 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

"Exterior render cleaned and painted. Side wall and rear of 2 storey house. Render needs cleaned. See photos. Please email for further details as I do not have UK mobile number." - G46, job posted 26/05/25

"Loft conversion" - B28, job posted 26/05/25

"Garden Fence and garden wall removing and 2 car garage building at the end of terraced garden" - WF10, job posted 26/05/25

"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO

"Single storey extension" - WATFORD, job posted 26/05/25

"Loft conversion" - ABERDEENSHIRE, job posted 26/05/25

"Need an extension builder" - STOURPORT-ON-SEVERN, job posted 25/05/25

"Need an extension builder" - SLOUGH, job posted 25/05/25

"Kitchen extension" - SPILSBY, job posted 25/05/25

"Two storey extension" - EAST RIDING, job posted 25/05/25

from 180 to 190 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.