Two-storey extensions in Devizes
Homeowners in Devizes can use us for the whole project or just the drawings and approvals. Start with a free visit.
Devizes at a glance
- Postcode districts
- SN10
- Area
- Wiltshire, England
- Price region
- South West England
- Nearest towns
- Calne (6.1 miles), Melksham (6.5 miles), Chippenham (9.4 miles), Trowbridge (9.5 miles)
- Distance to Swindon
- about 17 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover postcode district SN10 in and around Devizes, along with neighbouring Calne, Melksham and Chippenham.
Extensions available in Devizes
Two-storey rear extensions
Guide from £57,500 in Devizes, including VAT.
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Two-storey side extensions
Devizes guide price from £88,500, Standard spec.
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Two-storey wraparound extensions
Devizes guide price from £124,000, Standard spec.
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Part single, part two-storey extensions
Our South West England guide starts at £74,000 for this type.
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Extensions over a garage
Design, approvals and build for Devizes homes. Guide from £32,500.
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First-floor extensions
For homes in Devizes: typical guide from £26,000.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in Devizes, including VAT.
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Two-storey extensions for detached houses
From £88,500 in Devizes. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Devizes guide price from £57,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Our South West England guide starts at £57,500 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Which type suits your house in Devizes depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in Wiltshire
- 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
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Devizes
Devizes is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Devizes
Do you cover Devizes?
Yes. We cover Devizes (SN10) and the surrounding area, including Calne and Melksham. The first site visit is free.
What does a two-storey extension cost in Devizes?
Using our South West England 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 £57,500–£78,000 including VAT. An extension over a garage is about £32,500–£47,500.
Which other places near Devizes do you cover?
Everywhere around it, including Calne (6.1 miles), Melksham (6.5 miles) and Chippenham (9.4 miles), and the rest of Wiltshire.