Two-storey extensions in Street
Everything for a two-storey extension in Street, in one place: types, guide prices for South West England, the approval rules in England and how to get started.
Street at a glance
- Postcode districts
- BA6, BA16, TA10 and TA11
- Area
- Somerset, England
- Price region
- South West England
- Nearest towns
- Wells (7 miles), Shepton Mallet (9.5 miles), Bridgwater (11.4 miles), Yeovil (13.5 miles)
- Distance to Bath
- about 23.8 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.
Around Street we also work in Wells, Shepton Mallet and Bridgwater, and across the rest of Somerset. Postcode districts in and near Street: BA6, BA16, TA10 and TA11.
Extensions available in Street
Two-storey rear extensions
For homes in Street: typical guide from £57,500.
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Two-storey side extensions
From £88,500 in Street. Free visit to firm it up.
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Two-storey wraparound extensions
Guide from £124,000 in Street, including VAT.
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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
Guide from £32,500 in Street, including VAT.
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First-floor extensions
For homes in Street: typical guide from £26,000.
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Two-storey extensions for semi-detached houses
Our South West England guide starts at £57,500 for this type.
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Two-storey extensions for detached houses
From £88,500 in Street. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Design, approvals and build for Street homes. Guide from £57,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Design, approvals and build for Street homes. Guide from £57,500 (plus en-suite).
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Somerset, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in Somerset
- 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 Street
Street 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 Street
Do you cover Street?
Yes. We cover Street (BA6, BA16, TA10 and TA11) and the surrounding area, including Wells and Shepton Mallet. The first site visit is free.
What does a two-storey extension cost in Street?
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 Street do you cover?
Everywhere around it, including Wells (7 miles), Shepton Mallet (9.5 miles) and Bridgwater (11.4 miles), and the rest of Somerset.