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 |
|---|---|---|
| £12 | £29 | £70 |
| Average hourly rate of 9201 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 £34. Extension Builder rates vary with location. For example, L&P Developments Ltd in Gloucester charges from £31 per hour.
When hiring Extension Builders in the UK get multiple quote to compare prices and services.
Trusted, recommended Extension Builders
CL Builders Bolton Ltd
£27/hour
£196/day
Member since May 2026
Extension Builder in Bolton, BL4. Working within a 20 mile radius.
We’ve recently completed several large extensions and we can provide other trades required such as plumbing, Gas Safe Engineers, electricians, plastering and rendering.
Areas Covered - Covering Bolton, Bury, Leigh, Wigan, Manchester, Chorley.
"Two storey extension"
PO12
PSP Developments
£37.5/hour
£300/day
Member since January 2026
Extension Builder in Deeping St James, PE6. Working within a 20 mile radius.
Welcome to Price & Sons! We are a building company based in Peterborough. If you are interested in a quote please get in touch with us!
"Loft conversion"
WARRINGTON
Elite Building Contractors South Wales
£30/hour
£195/day
Member since June 2026
Trusted and professional extension builder in Cardiff. Experienced in all work and keeping within budget and on quote. Elite Building Contractors South Wales have many happy customers in Cardiff, testimonials available.
"Garden office"
CORNWALL
GR MAINTENANCE LTD
£37/hour
£236/day
Member since April 2025
Trusted and professional extension builder in Barking. Experienced in all work and keeping within budget and on quote. GR MAINTENANCE LTD have many happy customers in Barking, testimonials available.
"Loft conversion"
SHEFFIELD
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L&P Developments Ltd
£31/hour
£250/day
Member since April 2026
L&P Developments Ltd is an established and experienced local extension builder in Gloucester. Please contact us for a free, no obligation quote and competitive rates. Covering a 20 mile radius.
"Loft conversion"
NOTTINGHAM
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G & D Jones Ltd
£30/hour
£250/day
Member since June 2024
Extension Builder in Abergele, LL22. Working within a 20 mile radius.
G & D Jones Ltd. is a trusted name in North Wales plumbing, heating, electrical and building work. Established in 2018, we offer professional installations for both domestic and commercial properties, with a growing reputation for quality, consist...
Areas Covered - LL and CH post code
"Side return extension"
BRIGHTON
Deen Construction & Renovations Ltd
£38/hour
£237/day
Extension Builder in Essex, RM18. Working within a 10 mile radius.
At Deen Construction & Renovations Ltd, we offer a one stop solution for a range of property Constructions & Renovation projects, Maintenance, Full Plumbing design first fix and Installations, Including Maintenance. Property Decoration, and Handy...
"Kitchen extension"
Vines Construction Ltd
£38/hour
£252/day
Extension Builder in Walkern Stevenage, SG2. Working within a 20 mile radius.
Vines Construction Ltd is a young, enthusiastic, and positive company providing a wide range of building services covering all the Hertfordshire postcodes but predominantly across Stevenage and Hitchin. We undertake all types and size of residenti...
"Loft conversion"
LEEDS
Rockfort Construction
£38/hour
£245/day
Extension Builder in Berkshire, SL4. Working within a 20 mile radius.
Rockfort Construction Ltd is a Buckinghamshire based construction company who offer a professional service; specialising in the construction of bespoke individual luxury homes. The company’s managing director Michael O’Heney has over 40 years ...
"Dormer loft conversion"
SE3
Refresh Renovations Derbyshire
£29/hour
£214/day
Extension Builder in East Midlands, DE73. Working within a 20 mile radius.
Nestled in the rolling hillside of the West Midlands, Derby is a city birthed by the Roman Empire, and grown in the industrial revolution. Initially the centre of the British Rail industry, Derby is now the home of advanced transport manufacturing...
"Single storey extension"
PETERBOROUGH
from 10 to 20 of 9201
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.
