From £22,088
Hallamshire Paving is an established and experienced local extension builder in DE4. Please contact us for a free, no obligation quote and competit...
From £22,344
Trusted and professional extension builder in DE4. Experienced in all extension buildering work and keeping within budget and on quote. AMB Joinery...
From £22,008
We are a family run business with 20 years experience.
We take great care and attention to the work we carry out and pride ourselves on ...
From £21,992
Need to find an Extension Builder near you for all your extension buildering work?
A B Building Roofing Services provides a local, trusted ...
From £21,000
Honest, reliable, experienced building/civil engineering contractor established in 2001.
From £22,024
JG Design & Build is an established extension buildering business in DE4. We come highly recommended and provide competitive quotes for your work.<...
From £21,856
Relax... you have found a reliable extension builder in DE4. Bennett Damp Proofing & Timber is a friendly and reliable company based in DE4 who con...
From £21,936
Need an Extension Builder in DE4? Patrick David Building Services Limited has been helping local clients (20 mile radius) with their extension buil...
From £21,888
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,912
Need to find an Extension Builder near you for all your extension buildering work?
M F Westwick Construction Ltd provides a local, trusted ...

A flat roof extension ranges from the cheapest of £21,000 (HUSKINSON CONSTR SRVCS LTD based in NG16) to the dearest of £22,344 (AMB Joinery & Building Services based in S8), 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 DE4 by posting a job with HaMuch. We'll send it to extension builders in DE4.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Alfreton | £34 | £261 |
| Build A Flat Roof Extension near Belper | £32 | £244 |
| Build A Flat Roof Extension near Amber Valley | £32 | £244 |
| Build A Flat Roof Extension near Ripley | £32 | £246 |
| Build A Flat Roof Extension near Chesterfield | £33 | £257 |
| Build A Flat Roof Extension near Heanor | £31 | £236 |
| Build A Flat Roof Extension near Kirkby-in-Ashfield | £34 | £269 |
| Build A Flat Roof Extension near Ashfield | £34 | £269 |
| Build A Flat Roof Extension near Dronfield | £33 | £262 |
| Build A Flat Roof Extension near Sutton-in-Ashfield | £33 | £264 |
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 - £17,405

Two storey extension - £87,857

Build a timber frame extension - £25,905

Build a swimming pool - £80,905

Single storey extension - £53,096

Side return extension - £40,429

Install an RSJ - £2,105

Outbuilding - £9,905

Build a Mansard loft conversion - £51,905

Loft conversion - £32,858

Build a kitchen extension - £41,905

Hip to gable loft conversion - £41,905

Granny annexe - £86,905

Garden office - £9,905

Convert a Garage - £15,905

Garage - £18,405

Build a flat roof extension - £21,905

Build a dormer loft conversion - £41,905

Concrete foundations - £6,155

Convert a bungalow loft - £28,905

Convert a basement - £36,429