From £22,184
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
From £21,952
Need to find an Extension Builder near you for all your extension buildering work?
All Point Building provides a local, trusted extension b...
From £22,208
E R HEMMINGS (BUILDING) LTD is an established and experienced local extension builder in BS37. Please contact us for a free, no obligation quote an...
From £21,896
E R HEMMINGS (BUILDING) LTD are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your exte...
From £21,896
LJS General Builders is a trusted extension builder serving customers in BS37 and the surrounding area. Contact us to today to get a competitive qu...
From £22,200
Trusted and professional extension builder in BS37. Experienced in all extension buildering work and keeping within budget and on quote. C M M Buil...
From £22,264
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,088
NEW ENGLAND CONSTRUCTION LTD are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your ext...
From £22,192
Hello, we are small company that we can do all building jobs like roofing, loft conversion,Garage conversion, extension, house renovation, slabs an...
From £22,544
GARY G BOND LIMITED are here to help customers who need an Extension Builder in BS37. We offer a competitive rate to complete all your extension bu...

A flat roof extension ranges from the cheapest of £21,896 (E R HEMMINGS (BUILDING) LTD based in BS37) to the dearest of £22,544 (GARY G BOND LIMITED based in BS16), 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 BS37 by posting a job with HaMuch. We'll send it to extension builders in BS37.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Yate | £28 | £223 |
| Build A Flat Roof Extension near South Gloucestershire | £29 | £223 |
| Build A Flat Roof Extension near Bradley Stoke | £29 | £221 |
| Build A Flat Roof Extension near Kingswood | £29 | £223 |
| Build A Flat Roof Extension near Bristol | £29 | £222 |
| Build A Flat Roof Extension near Keynsham | £29 | £222 |
| Build A Flat Roof Extension near Clifton | £29 | £222 |
| Build A Flat Roof Extension near Chippenham | £29 | £218 |
| Build A Flat Roof Extension near Portishead | £29 | £221 |
| Build A Flat Roof Extension near Bath | £28 | £221 |
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 - £17,642

Two storey extension - £88,214

Build a timber frame extension - £26,142

Build a swimming pool - £81,142

Single storey extension - £57,848

Side return extension - £43,102

Install an RSJ - £2,342

Outbuilding - £10,142

Build a Mansard loft conversion - £52,142

Loft conversion - £35,085

Build a kitchen extension - £42,142

Hip to gable loft conversion - £42,142

Granny annexe - £87,142

Garden office - £10,142

Convert a Garage - £16,142

Garage - £18,642

Build a flat roof extension - £22,142

Build a dormer loft conversion - £42,142

Concrete foundations - £6,392

Convert a bungalow loft - £29,142

Convert a basement - £39,102