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 | £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, KIETH GRAY ROOFING & BUILDING in Hartlepool charges from £32 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.
Trusted, recommended Extension Builders
Mac Building Services
£27/hour
£212/day
Relax... you have found a reliable extension builder in Measham Swadlincote. Mac Building Services is a friendly and reliable company based in Meas...
"Loft conversion" - HARROW, job posted 04/04/26
B C S Loft & Joinery
£28/hour
£215/day
Experienced extension builder ready to quote for your work. B C S Loft & Joinery is the best extension builder in Braunstone. No obligation free qu...
"I am seeking an estimate for a loft conversion. This should include structural design. Hip to gable dormer, with a toilet and sink." - UB5, job posted 01/04/26
Piotr Building & Decorations
£33/hour
£235/day
Looking for an Extension Builder near Bedminster Down for all your extension buildering jobs?
Piotr Building & Decora...
"Knocking through structural wall. requires RSJ installation. I have structural plans and calculations if that helps" - CB23, job posted 31/03/26
Nathan Thomas Plumbing
£35/hour
£247/day
Nathan Thomas Plumbing is an established extension buildering business in Liverpool. We come highly recommended and provide competitive quotes for ...
"Cost to build a side return extension" - BN2, job posted 30/03/26
H&D CONSTRUCTION
£35/hour
£287/day
Need an Extension Builder in Galashiels? H&D CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for ...
"Dormer loft conversion" - IPSWICH, job posted 30/03/26
Conway Construction Ltd
£30/hour
£215/day
Conway Construction Ltd is an established extension buildering business in Moss Side. We come highly recommended and provide competitive quotes for...
"Brick double story extension" - OL4, job posted 30/03/26
KIETH GRAY ROOFING & BUILDING
£32/hour
£191/day
Experienced extension builder ready to quote for your work. KIETH GRAY ROOFING & BUILDING is the best extension builder in Hartlepool. No obligatio...
"A downstairs loo I think the wall will have to be knocked through from inside" - BA14, job posted 26/03/26
COUSINS BUILDG & RFING SRV LTD
£35/hour
£248/day
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"RSJ installation" - BS14, job posted 25/03/26
DHB Builders
£37/hour
£226/day
Trusted and professional extension builder in Shadforth. Experienced in all extension buildering work and keeping within budget and on quote. DHB B...
"Gallow brackets or rsj beam fitted into a loft to support a chimney breast which is currently supported by timber" - BS15, job posted 25/03/26
Building Craft Ltd
£36/hour
£242/day
Building Craft Ltd is an established extension buildering business in Grindon. We come highly recommended and provide competitive quotes for your w...
"Single story extension" - S60, job posted 24/03/26
from 50 to 60 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.
