Two-storey extensions in Heston
Everything for a two-storey extension in Heston, in one place: types, guide prices for London, the approval rules in England and how to get started.
Heston at a glance
- Postcode districts
- TW5
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Osterley (1 mile), Hounslow (1.2 miles), Isleworth (1.5 miles), Cranford (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 TW5 in and around Heston, along with neighbouring Osterley, Hounslow and Isleworth.
Extensions available in Heston
Two-storey rear extensions
For homes in Heston: typical guide from £67,000.
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Two-storey side extensions
Design, approvals and build for Heston homes. Guide from £103,500.
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Two-storey wraparound extensions
Design, approvals and build for Heston homes. Guide from £144,500.
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Part single, part two-storey extensions
Heston guide price from £86,500, Standard spec.
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Extensions over a garage
Design, approvals and build for Heston homes. Guide from £38,000.
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First-floor extensions
Guide from £30,000 in Heston, including VAT.
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Two-storey extensions for semi-detached houses
From £67,000 in Heston. Free visit to firm it up.
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Two-storey extensions for detached houses
Design, approvals and build for Heston homes. Guide from £103,500.
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Kitchen extensions with bedrooms above
Guide from £67,000 (before kitchen units) in Heston, including VAT.
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Extra bedroom and en-suite extensions
Design, approvals and build for Heston homes. Guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Heston, with a rough idea of the approval route and cost for each.
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 Heston
Heston 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 Heston
Do you cover Heston?
Yes. We cover Heston (TW5) and the surrounding area, including Osterley and Hounslow. The first site visit is free.
What does a two-storey extension cost in Heston?
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 Heston do you cover?
Everywhere around it, including Osterley (1 mile), Hounslow (1.2 miles) and Isleworth (1.5 miles), and the rest of Greater London.