Two-storey extensions in Chertsey
Everything for a two-storey extension in Chertsey, in one place: types, guide prices for South East England, the approval rules in England and how to get started.
Chertsey at a glance
- Postcode districts
- KT16
- Area
- Surrey, England
- Price region
- South East England
- Nearest towns
- Addlestone (1.3 miles), Weybridge (2.4 miles), Shepperton (2.6 miles), Staines (3 miles)
- Distance to Woking
- about 5.3 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 Chertsey (KT16) and the places around it, including Addlestone (1.3 miles), Weybridge (2.4 miles) and Shepperton.
Extensions available in Chertsey
Two-storey rear extensions
For homes in Chertsey: typical guide from £61,500.
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Two-storey side extensions
From £94,500 in Chertsey. Free visit to firm it up.
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Two-storey wraparound extensions
Design, approvals and build for Chertsey homes. Guide from £132,500.
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Part single, part two-storey extensions
From £79,000 in Chertsey. Free visit to firm it up.
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Extensions over a garage
Design, approvals and build for Chertsey homes. Guide from £34,500.
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First-floor extensions
Design, approvals and build for Chertsey homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
Guide from £61,500 in Chertsey, 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
From £61,500 (before kitchen units) in Chertsey. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Chertsey guide price from £61,500 (plus en-suite), Standard spec.
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 Chertsey 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 Chertsey
Chertsey 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 Chertsey
Do you cover Chertsey?
Yes. We cover Chertsey (KT16) and the surrounding area, including Addlestone and Weybridge. The first site visit is free.
What does a two-storey extension cost in Chertsey?
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 Chertsey do you cover?
Everywhere around it, including Addlestone (1.3 miles), Weybridge (2.4 miles) and Shepperton (2.6 miles), and the rest of Surrey.