K STOBBS BUILDING CONTRACTOR is an established extension buildering business in BA3. We come highly recommended and provide competitive quotes for ...
BURNELL BUILDERS LTD is an established extension buildering business in BA3. We come highly recommended and provide competitive quotes for your wor...
Trusted and professional extension builder in BA3. Experienced in all extension buildering work and keeping within budget and on quote. CETH CONSTR...
From £22,104
Need an Extension Builder in BA3? RHayes Roofing has been helping local clients (20 mile radius) with their extension buildering jobs for many year...
From £21,872
Need an Extension Builder in BA3? Marptree Design & Build limited has been helping local clients (20 mile radius) with their extension buildering j...
From £21,816
Experienced extension builder ready to quote for your work. J CROZIER (BUILDERS) LTD is the best extension builder in BA3. No obligation free quote...

A flat roof extension ranges from the cheapest of £21,816 (J CROZIER (BUILDERS) LTD based in BA2) to the dearest of £22,200 (CETH CONSTRUCTION LTD based in BA2), 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 BA3 by posting a job with HaMuch. We'll send it to extension builders in BA3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Bath | £32 | £249 |
| Build A Flat Roof Extension near Frome | £33 | £263 |
| Build A Flat Roof Extension near Keynsham | £33 | £251 |
| Build A Flat Roof Extension near Trowbridge | £34 | £266 |
| Build A Flat Roof Extension near Kingswood | £34 | £257 |
| Build A Flat Roof Extension near Bristol | £33 | £255 |
| Build A Flat Roof Extension near Clifton | £33 | £255 |
| Build A Flat Roof Extension near North Somerset | £32 | £245 |
| Build A Flat Roof Extension near South Gloucestershire | £34 | £260 |
| Build A Flat Roof Extension near Chippenham | £34 | £258 |
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 - £17,507

Two storey extension - £88,010

Build a timber frame extension - £26,007

Build a swimming pool - £81,007

Single storey extension - £55,133

Side return extension - £41,575

Install an RSJ - £2,207

Outbuilding - £10,007

Build a Mansard loft conversion - £52,007

Loft conversion - £33,813

Build a kitchen extension - £42,007

Hip to gable loft conversion - £42,007

Granny annexe - £87,007

Garden office - £10,007

Convert a Garage - £16,007

Garage - £18,507

Build a flat roof extension - £22,007

Build a dormer loft conversion - £42,007

Concrete foundations - £6,257

Convert a bungalow loft - £29,007

Convert a basement - £37,575