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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 £35. Extension Builder rates vary with location. For example, Axminster Design and Build Limited in Axminster charges from £29 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

"Loft conversion with 2 bedroom with wadrobes and toilet" - GLOUCESTER, job posted 17/02/25

"Extension to side of property" - S60, job posted 17/02/25

"Single storey extension" - HARLOW, job posted 17/02/25

"Garage" - CHESTERFIELD, job posted 17/02/25

"Extend kitchen into the garden size 6x6metre" - LU4, job posted 16/02/25

"Two storey extension" - KT2, job posted 16/02/25

"We are small builders looking quote for foundations ,groundworks and drainage - soakways Thanks Harsha.R" - AL8, job posted 16/02/25

"Loft conversion" - SWINDON, job posted 16/02/25

"Single storey extension" - PRESTWICH, job posted 16/02/25

"Loft conversion" - CROYDON, job posted 16/02/25

from 240 to 250 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.