Two-storey extensions in Clapham
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Clapham.
Clapham at a glance
- Postcode districts
- SW4
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Brixton Hill (0.9 miles), Balham (1 mile), Battersea (1.2 miles), Brixton (1.4 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 Clapham we also work in Brixton Hill, Balham and Battersea, and across the rest of Greater London. Postcode district in and near Clapham: SW4.
Extensions available in Clapham
Two-storey rear extensions
Our London guide starts at £67,000 for this type.
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Two-storey side extensions
From £103,500 in Clapham. Free visit to firm it up.
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Two-storey wraparound extensions
Guide from £144,500 in Clapham, including VAT.
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Part single, part two-storey extensions
For homes in Clapham: typical guide from £86,500.
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Extensions over a garage
Guide from £38,000 in Clapham, including VAT.
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First-floor extensions
Guide from £30,000 in Clapham, including VAT.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Clapham homes. Guide from £67,000.
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Two-storey extensions for detached houses
Guide from £103,500 in Clapham, including VAT.
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Kitchen extensions with bedrooms above
For homes in Clapham: typical guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Clapham: typical guide from £67,000 (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 Greater London, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Clapham
Clapham 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 Clapham
Do you cover Clapham?
Yes. We cover Clapham (SW4) and the surrounding area, including Brixton Hill and Balham. The first site visit is free.
What does a two-storey extension cost in Clapham?
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 Clapham do you cover?
Everywhere around it, including Brixton Hill (0.9 miles), Balham (1 mile) and Battersea (1.2 miles), and the rest of Greater London.