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 £35. Extension Builder rates vary with location. For example, Q Boss D&B in Essex charges from £45 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.

Trusted, recommended Extension Builders
Housemartin Building Services
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Single storey extension" - , job posted 08/03/25
MAHER MILLARD CONSTRUCTION LTD
Need to find an Extension Builder near you for all your extension buildering work?
MAHER MILLARD CONSTRUCTION LTD provides a local, trusted...
"Quote to extended our house front out and up. To Match and link up to next doors" - EX12, job posted 07/03/25
Q Boss D&B
Q Boss D&B is an established extension buildering business in Essex. We come highly recommended and provide competitive quotes for your work.
"Loft conversion" - HARROW ON THE HILL, job posted 07/03/25
ROB DINE CONSTRUCTION
ROB DINE CONSTRUCTION is an established and experienced local extension builder in Sholing. Please contact us for a free, no obligation quote and c...
"Quote to extended our house front out and up. To Match next doors" - EX12, job posted 07/03/25
Mobile Services
Need to find an Extension Builder near you for all your extension buildering work?
Mobile Services provides a local, trusted extension buil...
"Side return extension" - , job posted 07/03/25
Claytons Building and Roofing
Claytons Building and Roofing are here to help customers who need an Extension Builder in Southampton. We offer a competitive rate to complete all ...
"Build a Single Storey Rear kitchen extension. 5.3m x 2.6m" - BS41, job posted 07/03/25
Axminster Design and Build Limited
Need to find an Extension Builder near you for all your extension buildering work?
Axminster Design and Build Limited provides a local, tru...
"Loft conversion" - BD22, job posted 06/03/25
N Lewis Building
N Lewis Building is an established extension buildering business in Wilmslow. We come highly recommended and provide competitive quotes for your wo...
"Swimming pool with swim jet with Jacuzzi circa 6x3 depth 1.2-1.6, steam and sauna room, changing room, toilet, bar area. building circa 6m W x 16m L x 4m H with frontage Bi fold windows. Please contact for more information" - DN7, job posted 06/03/25
T K O Kitchens & Construction
Homeowners look no further if you want a qualified extension builder to work in your home. T K O Kitchens & Construction are tidy and neat, providi...
"Loft conversion" - NEWPORT, job posted 06/03/25
Bristol Building Co.Ltd
Bristol Building Co.Ltd is an established and experienced local extension builder in Bishopston. Please contact us for a free, no obligation quote ...
"Swimming pool" - DN7, job posted 06/03/25
from 230 to 240 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.




















