Two-storey extensions in Swindon
Homeowners in Swindon can use us for the whole project or just the drawings and approvals. Start with a free visit.
Swindon at a glance
- Postcode districts
- SN1, SN2, SN3, SN4, SN5, SN6 and nearby districts
- Area
- Wiltshire, England
- Price region
- South West England
- Nearest towns
- Wootton Bassett (5.4 miles), Calne (12.7 miles), Cirencester (13.8 miles), Wantage (15.4 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 Swindon (SN1, SN2, SN3, SN4, SN5, SN6 and nearby districts) and the places around it, including Wootton Bassett (5.4 miles), Calne (12.7 miles) and Cirencester.
Extensions available in Swindon
Two-storey rear extensions
Guide from £57,500 in Swindon, including VAT.
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Two-storey side extensions
From £88,500 in Swindon. Free visit to firm it up.
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Two-storey wraparound extensions
Design, approvals and build for Swindon homes. Guide from £124,000.
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Part single, part two-storey extensions
Design, approvals and build for Swindon homes. Guide from £74,000.
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Extensions over a garage
For homes in Swindon: typical guide from £32,500.
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First-floor extensions
Swindon guide price from £26,000, Standard spec.
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Two-storey extensions for semi-detached houses
Swindon guide price from £57,500, Standard spec.
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Two-storey extensions for detached houses
For homes in Swindon: typical guide from £88,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Swindon 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 Swindon, 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 Swindon
Swindon 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 Swindon
Do you cover Swindon?
Yes. We cover Swindon (SN1, SN2, SN3, SN4, SN5, SN6 and nearby districts) and the surrounding area, including Wootton Bassett and Calne. The first site visit is free.
What does a two-storey extension cost in Swindon?
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 Swindon do you cover?
Everywhere around it, including Wootton Bassett (5.4 miles), Calne (12.7 miles) and Cirencester (13.8 miles), and the rest of Wiltshire.