From £22,104
Durham, DH1
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in Durham. Please contact us for a free, no obligation quote and...
From £22,912
Durham, DH1
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 Durham? K & J Property has been helping local clients (20 mile radius) with their extension buildering jobs for many y...
From £22,000
Relax... you have found a reliable extension builder in Durham. AA Paving is a friendly and reliable company based in Durham who consider no job as...
From £21,832
LJP Roofing are here to help customers who need an Extension Builder in Durham. We offer a competitive rate to complete all your extension builderi...
From £21,832
Experienced extension builder ready to quote for your work. L F BUILDING & JOINERY is the best extension builder in Durham. No obligation free quot...
From £22,064
Croft-Hill Building & Joinery is a trusted extension builder serving customers in Durham and the surrounding area. Contact us to today to get a com...
From £21,808
Trusted and professional extension builder in Durham. Experienced in all extension buildering work and keeping within budget and on quote. DHB Buil...
From £21,912
Need an Extension Builder in Durham? Spacesaver Loft Storage has been helping local clients (20 mile radius) with their extension buildering jobs f...

A flat roof extension ranges from the cheapest of £21,760 (K & J Property based in DH7) 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 Durham by posting a job with HaMuch. We'll send it to extension builders in Durham.
| 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 | £254 |
| 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 | £35 | £235 |
| Build A Flat Roof Extension near Bishop Auckland | £39 | £247 |
| Build A Flat Roof Extension near Peterlee | £36 | £230 |
| 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 - £17,549

Two storey extension - £88,073

Build a timber frame extension - £26,049

Build a swimming pool - £81,049

Single storey extension - £55,976

Side return extension - £42,049

Install an RSJ - £2,249

Outbuilding - £10,049

Build a Mansard loft conversion - £52,049

Loft conversion - £34,208

Build a kitchen extension - £42,049

Hip to gable loft conversion - £42,049

Granny annexe - £87,049

Garden office - £10,049

Convert a Garage - £16,049

Garage - £18,549

Build a flat roof extension - £22,049

Build a dormer loft conversion - £42,049

Concrete foundations - £6,299

Convert a bungalow loft - £29,049

Convert a basement - £38,049