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 9083 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 £48. Extension Builder rates vary with location. For example, L.Jones Building in Barry charges from £35 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.
Trusted, recommended Extension Builders
RenNovator LTD
Dmitrii Melnic
At RenNovator LTD in Putney, London, our team have more than 15 years of exp...
"Single storey extension side extention with bathroom and two velux windows 5mx3.2m single story rear extention for dinner 2.6m x 3.5 m" - HP11, job posted 18/07/26
Mandala Building Services
Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
"RSJ installation" - DY3, job posted 18/07/26
"RSJ installation" - , job posted 18/07/26
£35/hr
£280/day
L.Jones Building
Lewis Jones
Member since October 2026
We are polite, punctual and respectful small construction business. We take pride in all our work.
"Single storey extension" - SN2, job posted 17/07/26
£50/hr
£350/day
Boss
Karl Builder
Member since October 2026
Hi we are a building company that have been working in the swindon area for many years we also work as far as bristol We do loft conversion. ...
"Single storey extension" - COULSDON, job posted 17/07/26
J&J Building Solutions
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Streatham. No obligation free q...
"Loft conversion" - , job posted 17/07/26
STONEWALK CONSTRUCTION LTD
STONEWALK CONSTRUCTION LTD is an established and experienced local extension builder in Ilminster. Please contact us for a free, no obligation quot...
"Loft conversion" - LUTON, job posted 15/07/26
Key Building Solutions
On time/ professional/ time served/trustworthy
"Loft conversion" - WV6, job posted 14/07/26
SMR Construction
Simon Ryder
Trusted and professional extension builder in birmingham. Experienced in all extension buildering work and keeping within budget and on quote. SMR ...
"Side and rear extension" - EX23, job posted 14/07/26
P R Building
P R Building is a trusted extension builder serving customers in Stamford Hill and the surrounding area. Contact us to today to get a competitive q...
"Extension to chalet bungalow/ inc dormer and whole house renovation in Fakenham" - NR21, job posted 13/07/26
from 30 to 40 of 9083
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.
