Two-storey extensions in Banstead
We design, get approval for and build two-storey extensions in Banstead and the surrounding area. Choose the type of extension below or book a free site visit.
Banstead at a glance
- Postcode districts
- KT20 and SM7
- Area
- Surrey, England
- Price region
- South East England
- Nearest towns
- Belmont (Greater London) (1.5 miles), Sutton (1.9 miles), Ewell (2.6 miles), Cheam (2.8 miles)
- Distance to Woking
- about 15.2 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.
Around Banstead we also work in Belmont (Greater London), Sutton and Ewell, and across the rest of Surrey. Postcode districts in and near Banstead: KT20 and SM7.
Extensions available in Banstead
Two-storey rear extensions
Our South East England guide starts at £61,500 for this type.
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Two-storey side extensions
From £94,500 in Banstead. Free visit to firm it up.
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Two-storey wraparound extensions
For homes in Banstead: typical guide from £132,500.
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Part single, part two-storey extensions
Guide from £79,000 in Banstead, including VAT.
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Extensions over a garage
From £34,500 in Banstead. Free visit to firm it up.
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First-floor extensions
From £27,500 in Banstead. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Guide from £61,500 in Banstead, including VAT.
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Two-storey extensions for detached houses
Our South East England guide starts at £94,500 for this type.
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Kitchen extensions with bedrooms above
For homes in Banstead: typical guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Banstead: typical guide from £61,500 (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 Surrey, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in Surrey
- 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 Banstead
Banstead 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 Banstead
Do you cover Banstead?
Yes. We cover Banstead (KT20 and SM7) and the surrounding area, including Belmont (Greater London) and Sutton. The first site visit is free.
What does a two-storey extension cost in Banstead?
Using our South East 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 £61,500–£83,000 including VAT. An extension over a garage is about £34,500–£50,500.
Which other places near Banstead do you cover?
Everywhere around it, including Belmont (Greater London) (1.5 miles), Sutton (1.9 miles) and Ewell (2.6 miles), and the rest of Surrey.