Two-storey extensions in Sunbury-on-Thames
Need more room in Sunbury-on-Thames? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Sunbury-on-Thames at a glance
- Postcode districts
- TW16
- Area
- Surrey, England
- Price region
- South East England
- Nearest towns
- Walton-on-Thames (1.2 miles), Shepperton (1.5 miles), West Molesey (1.7 miles), Hampton (2.3 miles)
- Distance to Woking
- about 8.5 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 Sunbury-on-Thames we also work in Walton-on-Thames, Shepperton and West Molesey, and across the rest of Surrey. Postcode district in and near Sunbury-on-Thames: TW16.
Extensions available in Sunbury-on-Thames
Two-storey rear extensions
Guide from £61,500 in Sunbury-on-Thames, including VAT.
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Two-storey side extensions
For homes in Sunbury-on-Thames: typical guide from £94,500.
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Two-storey wraparound extensions
Sunbury-on-Thames guide price from £132,500, Standard spec.
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Part single, part two-storey extensions
Guide from £79,000 in Sunbury-on-Thames, including VAT.
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Extensions over a garage
Our South East England guide starts at £34,500 for this type.
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First-floor extensions
Guide from £27,500 in Sunbury-on-Thames, including VAT.
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Two-storey extensions for semi-detached houses
Our South East England guide starts at £61,500 for this type.
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Two-storey extensions for detached houses
Design, approvals and build for Sunbury-on-Thames homes. Guide from £94,500.
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Kitchen extensions with bedrooms above
Sunbury-on-Thames guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Our South East England guide starts at £61,500 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Sunbury-on-Thames we also design annexes, home offices and bedrooms over garages.
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 Sunbury-on-Thames
Sunbury-on-Thames 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 Sunbury-on-Thames
Do you cover Sunbury-on-Thames?
Yes. We cover Sunbury-on-Thames (TW16) and the surrounding area, including Walton-on-Thames and Shepperton. The first site visit is free.
What does a two-storey extension cost in Sunbury-on-Thames?
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 Sunbury-on-Thames do you cover?
Everywhere around it, including Walton-on-Thames (1.2 miles), Shepperton (1.5 miles) and West Molesey (1.7 miles), and the rest of Surrey.