From £22,280
Trusted and professional extension builder in HP17. Experienced in all extension buildering work and keeping within budget and on quote. BUILDRIGHT...
From £22,240
AMG Roofing (Bucks) Ltd is owned by Ashley Gibson, a small, friendly, family run business that began in 2020, as a result of the Pandemic and an ac...
From £22,080
We are ADC Landscaping & Gardening, owned and run by Ashley Collier. We are a family business based in Aylesbury, Buckinghamshire, and cover all as...
From £22,448
Trusted and professional extension builder in HP17. Experienced in all extension buildering work and keeping within budget and on quote. C HORWOOD ...
From £21,960
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £21,968
Experienced extension builder ready to quote for your work. VICTOR KING CONSTRUCTION is the best extension builder in HP17. No obligation free quot...
From £22,440
Just Lofts are here to help customers who need an Extension Builder in HP17. We offer a competitive rate to complete all your extension buildering ...
From £22,160
D M B E BUILDPLUS is an established and experienced local extension builder in HP17. Please contact us for a free, no obligation quote and competit...
From £22,304
Relax... you have found a reliable extension builder in HP17. A J Shaw Building Services is a friendly and reliable company based in HP17 who consi...

A flat roof extension ranges from the cheapest of £21,960 (Bellwood Homes based in HP27) to the dearest of £22,448 (C HORWOOD CONSTRUCTION based in HP19), 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 HP17 by posting a job with HaMuch. We'll send it to extension builders in HP17.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Aylesbury | £42 | £270 |
| Build A Flat Roof Extension near Aylesbury Vale | £36 | £246 |
| Build A Flat Roof Extension near Wycombe | £39 | £271 |
| 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 Chesham | £42 | £277 |
| Build A Flat Roof Extension near Leighton Buzzard | £38 | £270 |
| Build A Flat Roof Extension near Berkhamsted | £41 | £263 |
| Build A Flat Roof Extension near South Oxfordshire | £36 | £253 |
| Build A Flat Roof Extension near Bicester | £35 | £249 |
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 - £17,700

Two storey extension - £88,300

Build a timber frame extension - £26,200

Build a swimming pool - £81,200

Single storey extension - £59,000

Side return extension - £43,750

Install an RSJ - £2,400

Outbuilding - £10,200

Build a Mansard loft conversion - £52,200

Loft conversion - £35,625

Build a kitchen extension - £42,200

Hip to gable loft conversion - £42,200

Granny annexe - £87,200

Garden office - £10,200

Convert a Garage - £16,200

Garage - £18,700

Build a flat roof extension - £22,200

Build a dormer loft conversion - £42,200

Concrete foundations - £6,450

Convert a bungalow loft - £29,200

Convert a basement - £39,750