From £22,424
Need an Extension Builder in Alnwick? K B Surveying has been helping local clients (20 mile radius) with their jobs for many years. Get a quote to...
From £22,344
Trusted and professional extension builder in Alnwick. Experienced in all work and keeping within budget and on quote. Smailes Construction Ltd ha...
From £21,304
We work from Tyne to Tweed. Friendly reliable trustworthy and quick. Free quotes and 1st class finish.

A flat roof extension ranges from the cheapest of £21,304 (GIBSON BUILDERS & CONTR LTD based in NE71) to the dearest of £22,424 (K B Surveying based in NE65), 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 Alnwick by posting a job with HaMuch. We'll send it to extension builders in Alnwick.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Ashington | £37 | £235 |
| Build A Flat Roof Extension near Blyth | £36 | £242 |
| Build A Flat Roof Extension near Cramlington | £31 | £221 |
| Build A Flat Roof Extension near Whitley Bay | £33 | £227 |
| Build A Flat Roof Extension near Longbenton | £29 | £204 |
| Build A Flat Roof Extension near North Tyneside | £30 | £216 |
| Build A Flat Roof Extension near Tynemouth | £30 | £219 |
| Build A Flat Roof Extension near Wallsend | £30 | £211 |
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 - £17,524

Two storey extension - £88,036

Build a timber frame extension - £26,024

Build a swimming pool - £81,024

Single storey extension - £55,480

Side return extension - £41,770

Install an RSJ - £2,224

Outbuilding - £10,024

Build a Mansard loft conversion - £52,024

Loft conversion - £33,975

Build a kitchen extension - £42,024

Hip to gable loft conversion - £42,024

Granny annexe - £87,024

Garden office - £10,024

Convert a Garage - £16,024

Garage - £18,524

Build a flat roof extension - £22,024

Build a dormer loft conversion - £42,024

Concrete foundations - £6,274

Convert a bungalow loft - £29,024

Convert a basement - £37,770