Two-storey extensions in Dumbarton
Homeowners in Dumbarton can use us for the whole project or just the drawings and approvals. Start with a free visit.
Dumbarton at a glance
- Postcode districts
- G82
- Area
- Glasgow and Dunbartonshire, Scotland
- Price region
- Scotland
- Nearest towns
- Vale of Leven (1.9 miles), Bonhill (2.4 miles), Alexandria (3.5 miles), Port Glasgow (4.6 miles)
- Distance to Glasgow
- about 13.3 miles
- Approvals
- Class 1B: two-storey extensions must be at least 10 m from every boundary to avoid planning permission, so most need an application.
Dumbarton sits about 13.3 miles from Glasgow. Closer to home, Vale of Leven is 1.9 miles away and Bonhill 2.4 miles.
Extensions available in Dumbarton
Two-storey rear extensions
Design, approvals and build for Dumbarton homes. Guide from £52,500.
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Two-storey side extensions
For homes in Dumbarton: typical guide from £81,000.
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Two-storey wraparound extensions
Our Scotland guide starts at £113,000 for this type.
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Part single, part two-storey extensions
Guide from £67,500 in Dumbarton, including VAT.
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Extensions over a garage
Guide from £29,500 in Dumbarton, including VAT.
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First-floor extensions
Dumbarton guide price from £23,500, Standard spec.
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Two-storey extensions for semi-detached houses
Guide from £52,500 in Dumbarton, including VAT.
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Two-storey extensions for detached houses
Our Scotland guide starts at £81,000 for this type.
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Kitchen extensions with bedrooms above
Design, approvals and build for Dumbarton homes. Guide from £52,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Design, approvals and build for Dumbarton homes. Guide from £52,500 (plus en-suite).
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Dumbarton, with a rough idea of the approval route and cost for each.
Also available in Glasgow and Dunbartonshire
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Design and build two-storey extensions
Rules for Dumbarton
Dumbarton is in Scotland. Class 1B: two-storey extensions must be at least 10 m from every boundary to avoid planning permission, so most need an application. Householder planning application: £371. Councils have two months to decide a local planning application.
The full Scotland rules explained
Questions about extensions in Dumbarton
Do you cover Dumbarton?
Yes. We cover Dumbarton (G82) and the surrounding area, including Vale of Leven and Bonhill. The first site visit is free.
What does a two-storey extension cost in Dumbarton?
Using our Scotland guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £52,500–£71,000 including VAT. An extension over a garage is about £29,500–£43,000.
Which other places near Dumbarton do you cover?
Everywhere around it, including Vale of Leven (1.9 miles), Bonhill (2.4 miles) and Alexandria (3.5 miles), and the rest of Glasgow and Dunbartonshire.