From £22,104
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in DH1. Please contact us for a free, no obligation quote and co...
From £22,912
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
From £21,760
Need an Extension Builder in DH1? K & J Property has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
From £22,000
Relax... you have found a reliable extension builder in DH1. AA Paving is a friendly and reliable company based in DH1 who consider no job as too b...
From £21,832
LJP Roofing are here to help customers who need an Extension Builder in DH1. We offer a competitive rate to complete all your extension buildering ...
From £21,160
We provide expert advice on building defects and cost effective environmental friendly solutions throughout the North East of England. Our bu...
From £21,832
Experienced extension builder ready to quote for your work. L F BUILDING & JOINERY is the best extension builder in DH1. No obligation free quotes ...
From £22,064
Croft-Hill Building & Joinery is a trusted extension builder serving customers in DH1 and the surrounding area. Contact us to today to get a compet...
From £21,808
Trusted and professional extension builder in DH1. Experienced in all extension buildering work and keeping within budget and on quote. DHB Builder...

A flat roof extension ranges from the cheapest of £21,160 (Dry Tec based in DH6) to the dearest of £22,912 (Radici Construction North East Ltd based in DH1), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in DH1 by posting a job with HaMuch. We'll send it to extension builders in DH1.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Durham | £47 | £267 |
| Build A Flat Roof Extension near Chester-le-Street | £35 | £242 |
| Build A Flat Roof Extension near Spennymoor | £38 | £248 |
| Build A Flat Roof Extension near Washington | £33 | £251 |
| Build A Flat Roof Extension near Sunderland | £33 | £251 |
| Build A Flat Roof Extension near Stanley | £34 | £242 |
| Build A Flat Roof Extension near Seaham | £34 | £229 |
| Build A Flat Roof Extension near Bishop Auckland | £39 | £247 |
| Build A Flat Roof Extension near Peterlee | £35 | £222 |
| Build A Flat Roof Extension near Newton Aycliffe | £39 | £227 |
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.

Underpin a building - £17,474

Two storey extension - £87,960

Build a timber frame extension - £25,974

Build a swimming pool - £80,974

Single storey extension - £54,472

Side return extension - £41,203

Install an RSJ - £2,174

Outbuilding - £9,974

Build a Mansard loft conversion - £51,974

Loft conversion - £33,503

Build a kitchen extension - £41,974

Hip to gable loft conversion - £41,974

Granny annexe - £86,974

Garden office - £9,974

Convert a Garage - £15,974

Garage - £18,474

Build a flat roof extension - £21,974

Build a dormer loft conversion - £41,974

Concrete foundations - £6,224

Convert a bungalow loft - £28,974

Convert a basement - £37,203