Two-storey extensions in Cheam
Homeowners in Cheam can use us for the whole project or just the drawings and approvals. Start with a free visit.
Cheam at a glance
- Postcode districts
- SM3
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Sutton (1.2 miles), Ewell (1.5 miles), Belmont (Greater London) (1.5 miles), Worcester Park (1.6 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 Cheam (SM3) and the places around it, including Sutton (1.2 miles), Ewell (1.5 miles) and Belmont (Greater London).
Extensions available in Cheam
Two-storey rear extensions
Cheam guide price from £67,000, Standard spec.
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Two-storey side extensions
Our London guide starts at £103,500 for this type.
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Two-storey wraparound extensions
Our London guide starts at £144,500 for this type.
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Part single, part two-storey extensions
For homes in Cheam: typical guide from £86,500.
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Extensions over a garage
Our London guide starts at £38,000 for this type.
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First-floor extensions
Design, approvals and build for Cheam homes. Guide from £30,000.
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Two-storey extensions for semi-detached houses
For homes in Cheam: typical guide from £67,000.
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Two-storey extensions for detached houses
Design, approvals and build for Cheam homes. Guide from £103,500.
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Kitchen extensions with bedrooms above
Our London guide starts at £67,000 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
Design, approvals and build for Cheam homes. Guide from £67,000 (plus en-suite).
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 Cheam we also design annexes, home offices and bedrooms over garages.
Also available in Greater London
- 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 Cheam
Cheam 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 Cheam
Do you cover Cheam?
Yes. We cover Cheam (SM3) and the surrounding area, including Sutton and Ewell. The first site visit is free.
What does a two-storey extension cost in Cheam?
Using our London 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 £67,000–£90,500 including VAT. An extension over a garage is about £38,000–£55,000.
Which other places near Cheam do you cover?
Everywhere around it, including Sutton (1.2 miles), Ewell (1.5 miles) and Belmont (Greater London) (1.5 miles), and the rest of Greater London.