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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	£86
Average hourly rate of 9110 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 £33. Extension Builder rates vary with location. For example, D & S Builders in Redruth charges from £28 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

"Two storey extension" - GATESHEAD, job posted 01/01/25

"Single storey extension" - HARTLEPOOL, job posted 31/12/24

"Modifications to existing buildings and create new extension We have full drawings available for download" - GL7, job posted 30/12/24

"Loft conversion" - CHESHIRE, job posted 30/12/24

"Side return extension" - SOUTH OXFORDSHIRE, job posted 30/12/24

"Loft conversion" - THANET, job posted 30/12/24

"Loft conversion with en suite" - CARDIFF, job posted 29/12/24

"Loft conversion - (2 Rooms and a shower) Total Area - 40 square metres)" - WD19, job posted 29/12/24

"Chimney stack removal" - S5, job posted 27/12/24

"Loft conversion" - WD17, job posted 27/12/24

from 250 to 260 of 9110

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.