Two-storey extensions in Mitcham
Everything for a two-storey extension in Mitcham, in one place: types, guide prices for London, the approval rules in England and how to get started.
Mitcham at a glance
- Postcode districts
- CR4
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Morden (1.3 miles), Tooting (1.5 miles), St Helier (1.6 miles), Furzedown (1.7 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 Mitcham we also work in Morden, Tooting and St Helier, and across the rest of Greater London. Postcode district in and near Mitcham: CR4.
Extensions available in Mitcham
Two-storey rear extensions
Guide from £67,000 in Mitcham, including VAT.
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Two-storey side extensions
From £103,500 in Mitcham. Free visit to firm it up.
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Two-storey wraparound extensions
From £144,500 in Mitcham. Free visit to firm it up.
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Part single, part two-storey extensions
Our London guide starts at £86,500 for this type.
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Extensions over a garage
Design, approvals and build for Mitcham homes. Guide from £38,000.
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First-floor extensions
Guide from £30,000 in Mitcham, including VAT.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Mitcham homes. Guide from £67,000.
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Two-storey extensions for detached houses
From £103,500 in Mitcham. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Guide from £67,000 (before kitchen units) in Mitcham, including VAT.
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Extra bedroom and en-suite extensions
Design, approvals and build for Mitcham homes. 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 Mitcham
Mitcham 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 Mitcham
Do you cover Mitcham?
Yes. We cover Mitcham (CR4) and the surrounding area, including Morden and Tooting. The first site visit is free.
What does a two-storey extension cost in Mitcham?
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 Mitcham do you cover?
Everywhere around it, including Morden (1.3 miles), Tooting (1.5 miles) and St Helier (1.6 miles), and the rest of Greater London.