From £21,648
Glenavon Joinery & Construction Services Ltd is an established extension buildering business in KA3. We come highly recommended and provide competi...
From £21,928
J & J Property Services is an established extension buildering business in KA3. We come highly recommended and provide competitive quotes for your ...
From £22,032
Col-In the Builder is a trusted extension builder serving customers in KA3 and the surrounding area. Contact us to today to get a competitive quote...
From £22,080
Adelphi Design & Construction Ltd is an established and experienced local extension builder in KA3. Please contact us for a free, no obligation quo...
From £22,296
Need an Extension Builder in KA3? Gman-Joinery & Builders has been helping local clients (20 mile radius) with their extension buildering jobs for ...
From £21,744
ABG Resin Bond & Landscaping Ltd have been transforming driveways for many years, laying tarmac and installing block-paving, fence...
From £21,808
Boyle Construction Glasgow Ltd is a trusted extension builder serving customers in KA3 and the surrounding area. Contact us to today to get a compe...
From £21,856
Need to find an Extension Builder near you for all your extension buildering work?
Montgomery Wet Trades provides a local, trusted extensio...
From £22,016
Trusted and professional extension builder in KA3. Experienced in all extension buildering work and keeping within budget and on quote. Sdh Builder...
From £21,752
Relax... you have found a reliable extension builder in KA3. Dingwall Joiners & Builders is a friendly and reliable company based in KA3 who consid...

A flat roof extension ranges from the cheapest of £21,648 (Glenavon Joinery & Construction Services Ltd based in ML10) to the dearest of £22,296 (Gman-Joinery & Builders based in G13), 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 KA3 by posting a job with HaMuch. We'll send it to extension builders in KA3.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Kilmarnock | £36 | £271 |
| Build A Flat Roof Extension near Irvine | £35 | £253 |
| Build A Flat Roof Extension near Kilwinning | £33 | £250 |
| Build A Flat Roof Extension near Troon | £32 | £241 |
| Build A Flat Roof Extension near North Ayrshire | £33 | £250 |
| Build A Flat Roof Extension near Barrhead | £35 | £255 |
| Build A Flat Roof Extension near Newton Mearns | £35 | £263 |
| Build A Flat Roof Extension near Prestwick | £24 | £180 |
| Build A Flat Roof Extension near Johnstone | £52 | £381 |
| Build A Flat Roof Extension near Giffnock | £35 | £260 |
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 - £17,416

Two storey extension - £87,874

Build a timber frame extension - £25,916

Build a swimming pool - £80,916

Single storey extension - £53,320

Side return extension - £40,555

Install an RSJ - £2,116

Outbuilding - £9,916

Build a Mansard loft conversion - £51,916

Loft conversion - £32,963

Build a kitchen extension - £41,916

Hip to gable loft conversion - £41,916

Granny annexe - £86,916

Garden office - £9,916

Convert a Garage - £15,916

Garage - £18,416

Build a flat roof extension - £21,916

Build a dormer loft conversion - £41,916

Concrete foundations - £6,166

Convert a bungalow loft - £28,916

Convert a basement - £36,555