Two-storey extensions in Kensal Green
Everything for a two-storey extension in Kensal Green, in one place: types, guide prices for London, the approval rules in England and how to get started.
Kensal Green at a glance
- Postcode districts
- W10
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Willesden (0.4 miles), Queen's Park (0.7 miles), Harlesden (1.2 miles), Maida Hill (1.5 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 Kensal Green we also work in Willesden, Queen's Park and Harlesden, and across the rest of Greater London. Postcode district in and near Kensal Green: W10.
Extensions available in Kensal Green
Two-storey rear extensions
From £67,000 in Kensal Green. Free visit to firm it up.
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Two-storey side extensions
From £103,500 in Kensal Green. Free visit to firm it up.
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Two-storey wraparound extensions
Design, approvals and build for Kensal Green homes. Guide from £144,500.
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Part single, part two-storey extensions
Design, approvals and build for Kensal Green homes. Guide from £86,500.
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Extensions over a garage
Guide from £38,000 in Kensal Green, including VAT.
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First-floor extensions
From £30,000 in Kensal Green. Free visit to firm it up.
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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
Guide from £103,500 in Kensal Green, including VAT.
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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
Guide from £67,000 (plus en-suite) in Kensal Green, including VAT.
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 Kensal Green 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 Kensal Green
Kensal Green 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 Kensal Green
Do you cover Kensal Green?
Yes. We cover Kensal Green (W10) and the surrounding area, including Willesden and Queen's Park. The first site visit is free.
What does a two-storey extension cost in Kensal Green?
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 Kensal Green do you cover?
Everywhere around it, including Willesden (0.4 miles), Queen's Park (0.7 miles) and Harlesden (1.2 miles), and the rest of Greater London.