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 £38. Extension Builder rates vary with location. For example, Buildmac Ltd in Totteridge charges from £42 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.

Trusted, recommended Extension Builders
Ferguson Building Services Limited
Ferguson Building Services Limited is an established and experienced local extension builder in Albourne. Please contact us for a free, no obligati...
"Single storey extension" - WS4, job posted 30/08/26
SC General Builders Ltd
SC General Builders Ltd are here to help customers who need an Extension Builder in London. We offer a competitive rate to complete all your extens...
"Single storey extension" - BT14, job posted 28/08/26
Darthy services and cleaning
Khondda Olham
We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...
"Build a kitchen extension" - B13, job posted 28/08/26
"Loft conversion" - BT81, job posted 27/08/26
Jones Masonry Ltd
Lee Jones
Jones Masonry Ltd is a trusted extension builder serving customers in Cleckheaton and the surrounding area. Contact us to today to get a competiti...
"Loft conversion with double dormer" - OL4, job posted 26/08/26
Ambassador Home Extensions
We understand that adding an extension or loft conversion to your house can often be stressful, time-consuming and inconvenient. But we believe tha...
"Two storey extension" - SL6, job posted 26/08/26
Buildmac Ltd
Chris Czerwinski
About us: Buildmac Ltd is a well-established, trustworthy, reliable and professional business based in High Wycombe, covering all surrounding areas...
"Loft conversion" - RM14, job posted 26/08/26
Daly Roofing Services
Daly Roofing are a family run company based across the Central Belt. Our owner Bradley has been in the roofing industry for over ten years....
"Underpin a building" - N10, job posted 26/08/26
DJ construction and conversions
Darren John
DJ construction and conversions is an established extension buildering business in Kidsgrove. We come highly recommended and provide competitive qu...
"Loft conversion" - OL8, job posted 26/08/26
B2 building Contractors Ltd
B2 building Contractors Ltd is an established and experienced local extension builder in Staffordshire. Please contact us for a free, no obligation...
"Single storey extension" - DE22, job posted 26/08/26
from 20 to 30 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.




















