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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 £28. Extension Builder rates vary with location. For example, D Mccormack in Penn charges from £32 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

"Side return extension" - BRISTOL, job posted 20/03/25

"Two storey extension" - AB99, job posted 20/03/25

"RSJ installation" - PLYMOUTH, job posted 19/03/25

"Loft conversion" - PRESTON, job posted 18/03/25

"Flat roof extension" - , job posted 18/03/25

"Flat roof extension" - E5, job posted 18/03/25

"Dormer loft conversion" - SHEFFIELD, job posted 18/03/25

"Side return extension cost for a ground floor." - IG11, job posted 17/03/25

"Side return extension" - , job posted 17/03/25

"Remove old p shape conservatory with dwarf wall and build 6x3.5 Mtrs a single storey extension with bifold doors plus 1 x window take out to internal walls add t steel approx length of steel for t is 9.5 Mtrs." - BH9, job posted 16/03/25

from 210 to 220 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.