Two-storey extensions in Chippenham
Planning a bigger home in Chippenham? Compare extension types and guide prices below, then book a free site visit.
Chippenham at a glance
- Postcode districts
- SN15
- Area
- Wiltshire, England
- Price region
- South West England
- Nearest towns
- Corsham (3.1 miles), Neston (Wiltshire) (4.6 miles), Calne (5.3 miles), Melksham (6.1 miles)
- Distance to Swindon
- about 16.2 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.
Chippenham sits about 16.2 miles from Swindon. Closer to home, Corsham is 3.1 miles away and Neston (Wiltshire) 4.6 miles.
Extensions available in Chippenham
Two-storey rear extensions
For homes in Chippenham: typical guide from £57,500.
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Two-storey side extensions
From £88,500 in Chippenham. Free visit to firm it up.
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Two-storey wraparound extensions
Our South West England guide starts at £124,000 for this type.
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Part single, part two-storey extensions
From £74,000 in Chippenham. Free visit to firm it up.
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Extensions over a garage
For homes in Chippenham: typical guide from £32,500.
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First-floor extensions
Chippenham guide price from £26,000, Standard spec.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in Chippenham, including VAT.
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Two-storey extensions for detached houses
Guide from £88,500 in Chippenham, including VAT.
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Kitchen extensions with bedrooms above
Design, approvals and build for Chippenham homes. Guide from £57,500 (before kitchen units).
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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?
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 Chippenham, with a rough idea of the approval route and cost for each.
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 Chippenham
Chippenham 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 Chippenham
Do you cover Chippenham?
Yes. We cover Chippenham (SN15) and the surrounding area, including Corsham and Neston (Wiltshire). The first site visit is free.
What does a two-storey extension cost in Chippenham?
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 Chippenham do you cover?
Everywhere around it, including Corsham (3.1 miles), Neston (Wiltshire) (4.6 miles) and Calne (5.3 miles), and the rest of Wiltshire.