Two-storey extensions in Walthamstow
Everything for a two-storey extension in Walthamstow, in one place: types, guide prices for London, the approval rules in England and how to get started.
Walthamstow at a glance
- Postcode districts
- E17
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Highams Park (1.3 miles), Tottenham Hale (1.7 miles), Snaresbrook (1.8 miles), Leytonstone (2 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 Walthamstow (E17) and the places around it, including Highams Park (1.3 miles), Tottenham Hale (1.7 miles) and Snaresbrook.
Extensions available in Walthamstow
Two-storey rear extensions
Walthamstow 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
For homes in Walthamstow: typical guide from £144,500.
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Part single, part two-storey extensions
For homes in Walthamstow: 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
Walthamstow guide price from £30,000, Standard spec.
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Two-storey extensions for semi-detached houses
From £67,000 in Walthamstow. Free visit to firm it up.
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Two-storey extensions for detached houses
For homes in Walthamstow: typical 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
For homes in Walthamstow: typical guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Rear and side extensions suit most semi-detached and detached houses with room around them. Terraced and town-centre homes can take a two-storey extension too, with more care over neighbours, light and access.
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 Walthamstow
Walthamstow 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 Walthamstow
Do you cover Walthamstow?
Yes. We cover Walthamstow (E17) and the surrounding area, including Highams Park and Tottenham Hale. The first site visit is free.
What does a two-storey extension cost in Walthamstow?
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 Walthamstow do you cover?
Everywhere around it, including Highams Park (1.3 miles), Tottenham Hale (1.7 miles) and Snaresbrook (1.8 miles), and the rest of Greater London.