Cody Stevens
Plumb & spark is an established extension buildering business in HP20. We come highly recommended and provide competitive quotes for your work.
JASON SHARP SHARP BUILDERS is a trusted extension builder serving customers in HP20 and the surrounding area. Contact us to today to get a competit...
THREE HUNDREDS BUILDING LTD are here to help customers who need an Extension Builder in HP20. We offer a competitive rate to complete all your exte...
Relax... you have found a reliable extension builder in HP20. A J Shaw Building Services is a friendly and reliable company based in HP20 who consi...
We are ADC Landscaping & Gardening, owned and run by Ashley Collier. We are a family business based in Aylesbury, Buckinghamshire, and cover all as...
Trusted and professional extension builder in HP20. Experienced in all extension buildering work and keeping within budget and on quote. C HORWOOD ...
D M B E BUILDPLUS is an established and experienced local extension builder in HP20. Please contact us for a free, no obligation quote and competit...
Just Lofts are here to help customers who need an Extension Builder in HP20. We offer a competitive rate to complete all your extension buildering ...
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 £21,968
Experienced extension builder ready to quote for your work. VICTOR KING CONSTRUCTION is the best extension builder in HP20. No obligation free quot...

A flat roof extension ranges from the cheapest of £21,968 (VICTOR KING CONSTRUCTION based in HP21) 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 HP20 by posting a job with HaMuch. We'll send it to extension builders in HP20.
| 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 Leighton Buzzard | £38 | £270 |
| Build A Flat Roof Extension near Berkhamsted | £41 | £263 |
| Build A Flat Roof Extension near Chesham | £42 | £277 |
| Build A Flat Roof Extension near Hazlemere | £40 | £272 |
| Build A Flat Roof Extension near Dunstable | £41 | £272 |
| Build A Flat Roof Extension near Bletchley | £39 | £265 |
| Build A Flat Roof Extension near Wycombe | £39 | £271 |
| Build A Flat Roof Extension near High Wycombe | £39 | £272 |
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 - £17,705

Two storey extension - £88,307

Build a timber frame extension - £26,205

Build a swimming pool - £81,205

Single storey extension - £59,096

Side return extension - £43,804

Install an RSJ - £2,405

Outbuilding - £10,205

Build a Mansard loft conversion - £52,205

Loft conversion - £35,670

Build a kitchen extension - £42,205

Hip to gable loft conversion - £42,205

Granny annexe - £87,205

Garden office - £10,205

Convert a Garage - £16,205

Garage - £18,705

Build a flat roof extension - £22,205

Build a dormer loft conversion - £42,205

Concrete foundations - £6,455

Convert a bungalow loft - £29,205

Convert a basement - £39,804