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Experienced extension builder ready to quote for your work. Glencroft Builders Ltd is the best extension builder in Dumbarton. No obligation free q...
LOCHNAGAR CONSTRUCTION LTD is a trusted extension builder serving customers in Dumbarton and the surrounding area. Contact us to today to get a com...
DRUMKINNON JOINERY & BUILDING is a trusted extension builder serving customers in Dumbarton and the surrounding area. Contact us to today to get a ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,400
Craig Ross
Trusted and professional extension builder in Dumbarton. Experienced in all extension buildering work and keeping within budget and on quote. CR Jo...

Costs range from £87,064 (Glencroft Builders Ltd based in G81) to £88,432 (GH BUILDING SERVICES LTD based in PA14), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Dumbarton | £29 | £232 |
| Two Storey Extension near Greenock | £30 | £243 |
| Two Storey Extension near Port Glasgow | £32 | £250 |
| Two Storey Extension near Erskine | £34 | £258 |
| Two Storey Extension near Clydebank | £35 | £265 |
| Two Storey Extension near Renfrewshire | £35 | £278 |
| Two Storey Extension near Renfrew | £35 | £264 |
| Two Storey Extension near Johnstone | £35 | £276 |
| Two Storey Extension near Paisley | £34 | £259 |
| Two Storey Extension 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 - £17,428

Two storey extension - £87,892

Build a timber frame extension - £25,928

Build a swimming pool - £80,928

Single storey extension - £53,560

Side return extension - £40,690

Install an RSJ - £2,128

Outbuilding - £9,928

Build a Mansard loft conversion - £51,928

Loft conversion - £33,075

Build a kitchen extension - £41,928

Hip to gable loft conversion - £41,928

Granny annexe - £86,928

Garden office - £9,928

Convert a Garage - £15,928

Garage - £18,428

Build a flat roof extension - £21,928

Build a dormer loft conversion - £41,928

Concrete foundations - £6,178

Convert a bungalow loft - £28,928

Convert a basement - £36,690