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Lee Townsend
Need to find an Extension Builder near you for all your extension buildering work?
Lp Townsend Brickwork provides a local, trusted extensio...
Chris Czerwinski
About us: Buildmac Ltd is a well-established, trustworthy, reliable and professional business based in High Wycombe, covering all surrounding areas...
Relax... you have found a reliable extension builder in Buckinghamshire. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in ...
BeautifulRenovation are here to help customers who need an Extension Builder in Buckinghamshire. We offer a competitive rate to complete all your e...
EIC Builders Ltd are here to help customers who need an Extension Builder in Buckinghamshire. We offer a competitive rate to complete all your exte...
B.A Ruffle Building Contractor is an established extension buildering business in Buckinghamshire. We come highly recommended and provide competiti...
HAMPTON CONSTRUCTION LTD are here to help customers who need an Extension Builder in Buckinghamshire. We offer a competitive rate to complete all y...
Trusted and professional extension builder in Buckinghamshire. Experienced in all extension buildering work and keeping within budget and on quote....
Our building services company A Iqbal Construction Ltd was established in 2018. Since then, we have been helping customers in Slough and the surrou...
Experienced extension builder ready to quote for your work. Rai Builders is the best extension builder in Buckinghamshire. No obligation free quote...

A flat roof extension ranges from the cheapest of £21,912 (TENNORCREST CONSTRUCTION based in SL6) to the dearest of £22,384 (HAMPTON CONSTRUCTION LTD based in SL2), 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 Buckinghamshire by posting a job with HaMuch. We'll send it to extension builders in Buckinghamshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Hazlemere | £40 | £272 |
| Build A Flat Roof Extension near High Wycombe | £39 | £272 |
| Build A Flat Roof Extension near Wycombe | £40 | £271 |
| Build A Flat Roof Extension near Maidenhead | £41 | £273 |
| Build A Flat Roof Extension near Gerrards Cross | £43 | £283 |
| Build A Flat Roof Extension near Chesham | £42 | £277 |
| Build A Flat Roof Extension near Slough | £42 | £272 |
| Build A Flat Roof Extension near Windsor & Maidenhead | £42 | £272 |
| Build A Flat Roof Extension near Rickmansworth | £43 | £282 |
| Build A Flat Roof Extension near Windsor | £41 | £271 |
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 - £17,570

Two storey extension - £88,104

Build a timber frame extension - £26,070

Build a swimming pool - £81,070

Single storey extension - £56,392

Side return extension - £42,283

Install an RSJ - £2,270

Outbuilding - £10,070

Build a Mansard loft conversion - £52,070

Loft conversion - £34,403

Build a kitchen extension - £42,070

Hip to gable loft conversion - £42,070

Granny annexe - £87,070

Garden office - £10,070

Convert a Garage - £16,070

Garage - £18,570

Build a flat roof extension - £22,070

Build a dormer loft conversion - £42,070

Concrete foundations - £6,320

Convert a bungalow loft - £29,070

Convert a basement - £38,283