From £52,160
Kenmure Joinery Services are here to help customers who need an Extension Builder in Dumbarton. We offer a competitive rate to complete all your ex...
From £52,080
Adelphi Design & Construction Ltd is an established and experienced local extension builder in Dumbarton. Please contact us for a free, no obligati...
From £52,296
Need an Extension Builder in Dumbarton? Gman-Joinery & Builders has been helping local clients (20 mile radius) with their extension buildering job...
From £51,952
Relax... you have found a reliable extension builder in Dumbarton. DS Builders is a friendly and reliable company based in Dumbarton who consider n...
From £51,928
J & J Property Services is an established extension buildering business in Dumbarton. We come highly recommended and provide competitive quotes for...
From £51,808
Boyle Construction Glasgow Ltd is a trusted extension builder serving customers in Dumbarton and the surrounding area. Contact us to today to get a...
From £51,856
Need to find an Extension Builder near you for all your extension buildering work?
Montgomery Wet Trades provides a local, trusted extensio...
From £51,376
Experienced extension builder ready to quote for your work. Glencroft Builders Ltd is the best extension builder in Dumbarton. No obligation free q...
From £51,968
RADICAL CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in Dumbarton. We offer a competitive rate to complete all you...

Mansard loft conversions range from the cheapest installation of £51,376 (Glencroft Builders Ltd based in G81) to the dearest of around £52,296 (Gman-Joinery & Builders based in G13).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in Dumbarton by posting a job with HaMuch and we'll send it to extension builders in Dumbarton.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Dumbarton | £29 | £232 |
| Build A Mansard Loft Conversion near Greenock | £30 | £243 |
| Build A Mansard Loft Conversion near Port Glasgow | £32 | £250 |
| Build A Mansard Loft Conversion near Erskine | £34 | £258 |
| Build A Mansard Loft Conversion near Clydebank | £35 | £264 |
| Build A Mansard Loft Conversion near Renfrewshire | £54 | £398 |
| Build A Mansard Loft Conversion near Renfrew | £35 | £263 |
| Build A Mansard Loft Conversion near Johnstone | £52 | £381 |
| Build A Mansard Loft Conversion near Paisley | £34 | £259 |
| Build A Mansard Loft Conversion near Bearsden | £34 | £263 |
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 - £87,822

Build a timber frame extension - £25,882

Build a swimming pool - £80,882

Single storey extension - £52,632

Side return extension - £40,168

Install an RSJ - £2,082

Outbuilding - £9,882

Build a Mansard loft conversion - £51,882

Loft conversion - £32,640

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 - £36,168