From £22,160
Kenmure Joinery Services are here to help customers who need an Extension Builder in West Dunbartonshire. We offer a competitive rate to complete a...
From £22,080
Adelphi Design & Construction Ltd is an established and experienced local extension builder in West Dunbartonshire. Please contact us for a free, n...
From £22,296
Need an Extension Builder in West Dunbartonshire? Gman-Joinery & Builders has been helping local clients (20 mile radius) with their extension buil...
From £21,952
Relax... you have found a reliable extension builder in West Dunbartonshire. DS Builders is a friendly and reliable company based in West Dunbarton...
From £21,928
J & J Property Services is an established extension buildering business in West Dunbartonshire. We come highly recommended and provide competitive ...
From £21,808
Boyle Construction Glasgow Ltd is a trusted extension builder serving customers in West Dunbartonshire and the surrounding area. Contact us to toda...
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 West Dunbartonshire. Experienced in all extension buildering work and keeping within budget and on qu...
From £21,376
Experienced extension builder ready to quote for your work. Glencroft Builders Ltd is the best extension builder in West Dunbartonshire. No obligat...

A flat roof extension ranges from the cheapest of £21,376 (Glencroft Builders Ltd based in G81) 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 West Dunbartonshire by posting a job with HaMuch. We'll send it to extension builders in West Dunbartonshire.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Dumbarton | £29 | £232 |
| Build A Flat Roof Extension near Erskine | £34 | £258 |
| Build A Flat Roof Extension near Greenock | £30 | £243 |
| Build A Flat Roof Extension near Port Glasgow | £32 | £250 |
| Build A Flat Roof Extension near Clydebank | £35 | £264 |
| Build A Flat Roof Extension near Renfrew | £35 | £263 |
| Build A Flat Roof Extension near Renfrewshire | £54 | £398 |
| Build A Flat Roof Extension near Bearsden | £34 | £263 |
| Build A Flat Roof Extension near Johnstone | £52 | £381 |
| Build A Flat Roof Extension near Paisley | £34 | £259 |
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 - £17,386

Two storey extension - £87,830

Build a timber frame extension - £25,886

Build a swimming pool - £80,886

Single storey extension - £52,728

Side return extension - £40,222

Install an RSJ - £2,086

Outbuilding - £9,886

Build a Mansard loft conversion - £51,886

Loft conversion - £32,685

Build a kitchen extension - £41,886

Hip to gable loft conversion - £41,886

Granny annexe - £86,886

Garden office - £9,886

Convert a Garage - £15,886

Garage - £18,386

Build a flat roof extension - £21,886

Build a dormer loft conversion - £41,886

Concrete foundations - £6,136

Convert a bungalow loft - £28,886

Convert a basement - £36,222