From £21,752
Experienced extension builder ready to quote for your work. Kingsley Developments is the best extension builder in NP20. No obligation free quotes ...
From £21,920
Kingsley Developments is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and comp...
From £21,760
Sharif General Builder is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and com...
From £21,712
PMW Property Services Ltd is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and ...
From £22,000
Trusted and professional extension builder in NP20. Experienced in all extension buildering work and keeping within budget and on quote. A P FORD B...
From £22,056
Matthew O'Brien is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and competitiv...
From £21,912
Relax... you have found a reliable extension builder in NP20. Ace Paving is a friendly and reliable company based in NP20 who consider no job as to...
From £21,928
Experienced extension builder ready to quote for your work. DAYS BUILDING SERVICES LTD is the best extension builder in NP20. No obligation free qu...
From £21,992
Relax... you have found a reliable extension builder in NP20. RKD Maintenance & Construction is a friendly and reliable company based in NP20 who c...
From £21,792
T Porter Buiding is an established and experienced local extension builder in NP20. Please contact us for a free, no obligation quote and competiti...

A flat roof extension ranges from the cheapest of £21,712 (PMW Property Services Ltd based in NP20) to the dearest of £22,056 (Matthew O'Brien based in NP19), 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 NP20 by posting a job with HaMuch. We'll send it to extension builders in NP20.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Newport | £37 | £200 |
| Build A Flat Roof Extension near Cwmbran | £39 | £190 |
| Build A Flat Roof Extension near Risca | £27 | £185 |
| Build A Flat Roof Extension near Pontypool | £26 | £183 |
| Build A Flat Roof Extension near Caerphilly | £29 | £181 |
| Build A Flat Roof Extension near Cardiff | £30 | £190 |
| Build A Flat Roof Extension near Clevedon | £29 | £219 |
| Build A Flat Roof Extension near Portishead | £29 | £221 |
| Build A Flat Roof Extension near Penarth | £31 | £189 |
| Build A Flat Roof Extension near Church Village | £30 | £188 |
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 - £17,382

Two storey extension - £87,824

Build a timber frame extension - £25,882

Build a swimming pool - £80,882

Single storey extension - £52,648

Side return extension - £40,177

Install an RSJ - £2,082

Outbuilding - £9,882

Build a Mansard loft conversion - £51,882

Loft conversion - £32,648

Build a kitchen extension - £41,882

Hip to gable loft conversion - £41,882

Granny annexe - £86,882

Garden office - £9,882

Convert a Garage - £15,882

Garage - £18,382

Build a flat roof extension - £21,882

Build a dormer loft conversion - £41,882

Concrete foundations - £6,132

Convert a bungalow loft - £28,882

Convert a basement - £36,177