From £22,128
STONEWALK CONSTRUCTION LTD is an established and experienced local extension builder in BA21. Please contact us for a free, no obligation quote and...
From £21,952
Experienced extension builder ready to quote for your work. ABS Abbott Preservation is the best extension builder in BA21. No obligation free quote...
From £22,256
TOTAL BUILDING SERVICES is an established extension buildering business in BA21. We come highly recommended and provide competitive quotes for your...
From £21,856
Firestone Surfacing Ltd is a trusted extension builder serving customers in BA21 and the surrounding area. Contact us to today to get a competitive...
From £21,864
Need to find an Extension Builder near you for all your extension buildering work?
Axminster Design and Build Limited provides a local, tru...
From £21,992
Adrian Fowler Property Maintenance & General Building is a trusted extension builder serving customers in BA21 and the surrounding area. Contact us...
From £22,184
Experienced extension builder ready to quote for your work. WILD CONSTRUCTION LTD is the best extension builder in BA21. No obligation free quotes ...
From £22,024
Experienced extension builder ready to quote for your work. LYME BAY BUILDING CO LTD is the best extension builder in BA21. No obligation free quot...
From £21,760
Ian Hunt Building Services is an established and experienced local extension builder in BA21. Please contact us for a free, no obligation quote and...

A flat roof extension ranges from the cheapest of £21,528 (C O JOYCE LIMITED based in BA16) to the dearest of £22,256 (TOTAL BUILDING SERVICES based in TA6), 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 BA21 by posting a job with HaMuch. We'll send it to extension builders in BA21.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Yeovil | £34 | £294 |
| Build A Flat Roof Extension near South Somerset | £62 | £270 |
| Build A Flat Roof Extension near Dorchester | £30 | £230 |
| Build A Flat Roof Extension near Bridgwater | £30 | £236 |
| Build A Flat Roof Extension near Taunton | £31 | £242 |
| Build A Flat Roof Extension near Weymouth | £33 | £260 |
| Build A Flat Roof Extension near Frome | £33 | £263 |
| Build A Flat Roof Extension near Bath | £32 | £249 |
| Build A Flat Roof Extension near East Devon | £27 | £221 |
| Build A Flat Roof Extension near Weston-super-Mare | £33 | £253 |
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 - £17,454

Two storey extension - £87,932

Build a timber frame extension - £25,954

Build a swimming pool - £80,954

Single storey extension - £54,088

Side return extension - £40,987

Install an RSJ - £2,154

Outbuilding - £9,954

Build a Mansard loft conversion - £51,954

Loft conversion - £33,323

Build a kitchen extension - £41,954

Hip to gable loft conversion - £41,954

Granny annexe - £86,954

Garden office - £9,954

Convert a Garage - £15,954

Garage - £18,454

Build a flat roof extension - £21,954

Build a dormer loft conversion - £41,954

Concrete foundations - £6,204

Convert a bungalow loft - £28,954

Convert a basement - £36,987