From £22,056
Trusted and professional extension builder in Carnaby. Experienced in all extension buildering work and keeping within budget and on quote. Room at...
From £21,728
NORCON CONSTRUCTION LTD is an established and experienced local extension builder in Carnaby. Please contact us for a free, no obligation quote and...
From £21,976
Relax... you have found a reliable extension builder in Carnaby. Roof Force Roofing Specialists Limited is a friendly and reliable company based in...

A flat roof extension ranges from the cheapest of £21,728 (NORCON CONSTRUCTION LTD based in YO14) to the dearest of £22,056 (Room at the Top Loft Conversions based in YO16), 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 Carnaby by posting a job with HaMuch. We'll send it to extension builders in Carnaby.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Bridlington | £32 | £252 |
| Build A Flat Roof Extension near Scarborough | £29 | £234 |
| Build A Flat Roof Extension near Beverley | £29 | £223 |
| Build A Flat Roof Extension near East Riding | £29 | £223 |
| Build A Flat Roof Extension near Hull | £29 | £223 |
| Build A Flat Roof Extension near Willerby | £29 | £221 |
| Build A Flat Roof Extension near Goole | £26 | £217 |
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 - £17,420

Two storey extension - £87,880

Build a timber frame extension - £25,920

Build a swimming pool - £80,920

Single storey extension - £53,400

Side return extension - £40,600

Install an RSJ - £2,120

Outbuilding - £9,920

Build a Mansard loft conversion - £51,920

Loft conversion - £33,000

Build a kitchen extension - £41,920

Hip to gable loft conversion - £41,920

Granny annexe - £86,920

Garden office - £9,920

Convert a Garage - £15,920

Garage - £18,420

Build a flat roof extension - £21,920

Build a dormer loft conversion - £41,920

Concrete foundations - £6,170

Convert a bungalow loft - £28,920

Convert a basement - £36,600