Find affordable extension builders
- 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 £34. Extension Builder rates vary with location. For example, Warrington Builders in Great Sankey charges from £32 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.
Trusted, recommended Extension Builders
POVERSET BUILDING COMPANY
Curtis Archer
Relax... you have found a reliable extension builder in Petts Wood. POVERSET BUILDING COMPANY is a friendly and reliable company based in Petts Woo...
"Loft conversion" - WS10, job posted 08/05/26
£37/hr
£235/day
Can design and Construction
Erald Kanani
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Loft conversion" - WD19, job posted 07/05/26
Kaizen Building & Construction
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
"Granny annexe space for mum with separate quarters" - S72, job posted 07/05/26
D WHYTON BUILDING SERVICES LTD
D WHYTON BUILDING SERVICES LTD is a trusted extension builder serving customers in Portland and the surrounding area. Contact us to today to get a ...
"Loft conversion" - NORTHAMPTONSHIRE, job posted 07/05/26
T M Builder
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"RSJ installation, I am looking for a price to source and install two beams, photos attached of measurements. Thanks." - BT43, job posted 06/05/26
J.T.Construction
J.T.Construction is a trusted extension builder serving customers in Great Sankey and the surrounding area. Contact us to today to get a competitiv...
"Ext.dhtyhui bfyjuuijk bhh" - S1, job posted 06/05/26
Fixit Cheshire
Fixit Cheshire is an established and experienced local extension builder in Great Sankey. Please contact us for a free, no obligation quote and com...
"RSJ installation" - CREWKERNE, job posted 06/05/26
WOODBINE BUILDING CONT LTD
Trusted and professional extension builder in Lymm. Experienced in all extension buildering work and keeping within budget and on quote. WOODBINE B...
"Two storey extension" - S20, job posted 06/05/26
JOHN ROSS BUILDERS LTD
Need to find an Extension Builder near you for all your extension buildering work?
JOHN ROSS BUILDERS LTD provides a local, trusted extensi...
"Loft conversion" - B68, job posted 06/05/26
Warrington Builders
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Timber frame first floor extension above the garage, with outer leaf brickwork and tiled pitched roof above." - MK6, job posted 04/05/26
from 50 to 60 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.
