From £22,096
Relax... you have found a reliable extension builder in Wycombe Marsh. Building High Wycombe is a friendly and reliable company based in Wycombe Ma...
From £22,400
Lazor Construction Ltd are here to help customers who need an Extension Builder in Wycombe Marsh. We offer a competitive rate to complete all your ...
From £22,088
Need to find an Extension Builder near you for all your extension buildering work?
PSB Builders Ltd provides a local, trusted extension bui...
From £22,088
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,040
Mitchell & Co Building & Renovations Ltd is an established extension buildering business in Wycombe Marsh. We come highly recommended and provide c...
From £22,424
Here at S Halls Construction Ltd, we undertake all hard landscaping works. Patios, driveways, fencing and groundworks, we also cover many areas of ...
From £21,904
Bow Tie Construction is an established and experienced local extension builder in Wycombe Marsh. Please contact us for a free, no obligation quote ...
From £22,272
Trusted and professional extension builder in Wycombe Marsh. Experienced in all extension buildering work and keeping within budget and on quote. G...
From £22,320
Trusted and professional extension builder in Wycombe Marsh. Experienced in all extension buildering work and keeping within budget and on quote. S...
From £22,280
Our building services company Charts Project Management and Build has been helping customers in Buckinghamshire and the surrounding area by providi...

A flat roof extension ranges from the cheapest of £21,904 (Bow Tie Construction based in HP12) to the dearest of £22,424 (S Halls Construction Ltd based in HP13), 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 Wycombe Marsh by posting a job with HaMuch. We'll send it to extension builders in Wycombe Marsh.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near High Wycombe | £39 | £272 |
| Build A Flat Roof Extension near Hazlemere | £40 | £272 |
| Build A Flat Roof Extension near Wycombe | £39 | £271 |
| Build A Flat Roof Extension near Maidenhead | £41 | £273 |
| Build A Flat Roof Extension near Gerrards Cross | £43 | £282 |
| 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 | £42 | £278 |
| 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 - £17,691

Two storey extension - £88,287

Build a timber frame extension - £26,191

Build a swimming pool - £81,191

Single storey extension - £58,824

Side return extension - £43,651

Install an RSJ - £2,391

Outbuilding - £10,191

Build a Mansard loft conversion - £52,191

Loft conversion - £35,543

Build a kitchen extension - £42,191

Hip to gable loft conversion - £42,191

Granny annexe - £87,191

Garden office - £10,191

Convert a Garage - £16,191

Garage - £18,691

Build a flat roof extension - £22,191

Build a dormer loft conversion - £42,191

Concrete foundations - £6,441

Convert a bungalow loft - £29,191

Convert a basement - £39,651