Two-storey extensions in New Malden
Homeowners in New Malden can use us for the whole project or just the drawings and approvals. Start with a free visit.
New Malden at a glance
- Postcode districts
- KT3
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Norbiton (1.2 miles), Worcester Park (1.6 miles), Tolworth (1.6 miles), Surbiton (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.
We cover postcode district KT3 in and around New Malden, along with neighbouring Norbiton, Worcester Park and Tolworth.
Extensions available in New Malden
Two-storey rear extensions
Guide from £67,000 in New Malden, including VAT.
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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
Design, approvals and build for New Malden homes. Guide from £144,500.
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Part single, part two-storey extensions
For homes in New Malden: 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
New Malden guide price from £30,000, Standard spec.
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Two-storey extensions for semi-detached houses
Our London guide starts at £67,000 for this type.
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Two-storey extensions for detached houses
Design, approvals and build for New Malden homes. Guide from £103,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for New Malden homes. Guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
Our London guide starts at £67,000 (plus en-suite) for this type.
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 New Malden
New Malden 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 New Malden
Do you cover New Malden?
Yes. We cover New Malden (KT3) and the surrounding area, including Norbiton and Worcester Park. The first site visit is free.
What does a two-storey extension cost in New Malden?
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 New Malden do you cover?
Everywhere around it, including Norbiton (1.2 miles), Worcester Park (1.6 miles) and Tolworth (1.6 miles), and the rest of Greater London.