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 £48. Extension Builder rates vary with location. For example, KERFIELD BUILDING SERVICES LTD in Emerson Park charges from £41 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.

Trusted, recommended Extension Builders
JOHN KERR BRICKWORK & BUILDING
John Kerr
JOHN KERR BRICKWORK & BUILDING is an established extension buildering business in Birstall. We come highly recommended and provide competitive quot...
"Garage conversion" - WEST SUSSEX, job posted 02/01/25
KERFIELD BUILDING SERVICES LTD
Need to find an Extension Builder near you for all your extension buildering work?
KERFIELD BUILDING SERVICES LTD provides a local, trusted...
"Loft conversion" - CHESTER, job posted 01/01/25
Prendi Construction Ltd
Peter Prendi
Prendi Construction Ltd is an established and experienced local extension builder in Romford. Please contact us for a free, no obligation quote and...
"Two storey extension" - GATESHEAD, job posted 01/01/25
Banga Decoration
Sebastian Banga
Member since August 2025
Banga decoration. Is Base in south London for number of year Banga decoration is a small company. Wich provide an excellent job to the custom...
"Single storey extension" - HARTLEPOOL, job posted 31/12/24
Guven Buildings LTD
Hikmet Guven
skilled worker who specializes in completing a wide range of building and renovation projects
"Modifications to existing buildings and create new extension We have full drawings available for download" - GL7, job posted 30/12/24
J Mchayle & Sons
J Mchayle & Sons are here to help customers who need an Extension Builder in Rush Green. We offer a competitive rate to complete all your extension...
"Loft conversion" - CHESHIRE, job posted 30/12/24
MD Building & Project Management Ltd
Need an Extension Builder in Romford? MD Building & Project Management Ltd has been helping local clients (10 mile radius) with their extension bui...
"Side return extension" - SOUTH OXFORDSHIRE, job posted 30/12/24
Building Vision London Ltd
Building Vision London Ltd is a trusted extension builder serving customers in London and the surrounding area. Contact us to today to get a compet...
"Loft conversion" - THANET, job posted 30/12/24
Anji Construction
Need the extension buildering job done quickly without breaking the bank? Anji Construction offer fast, reliable, and affordable extension builderi...
"Loft conversion with en suite" - CARDIFF, job posted 29/12/24
SS Home Builders
SS Home Builders is a trusted extension builder serving customers in Romford and the surrounding area. Contact us to today to get a competitive quo...
"Loft conversion - (2 Rooms and a shower) Total Area - 40 square metres)" - WD19, job posted 29/12/24
from 260 to 270 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.




















