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 £41. 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
Mandala Building Services
Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
"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
"RSJ installation" - DY3, 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.
"RSJ installation" - , job posted 18/07/26
£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" - SN2, 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...
"Single storey extension" - COULSDON, 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" - , job posted 17/07/26
Key Building Solutions
On time/ professional/ time served/trustworthy
"Loft conversion" - LUTON, job posted 15/07/26
TR1 Construction Ltd
TR1 Construction Ltd is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles around Truro...
"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 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.
