Two-storey extensions in Southall
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Southall.
Southall at a glance
- Postcode districts
- UB1 and UB2
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Greenford (1.5 miles), Heston (1.8 miles), West Ealing (2.1 miles), Osterley (2.1 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 Southall (UB1 and UB2) and the places around it, including Greenford (1.5 miles), Heston (1.8 miles) and West Ealing.
Extensions available in Southall
Two-storey rear extensions
From £67,000 in Southall. Free visit to firm it up.
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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
Southall guide price from £144,500, Standard spec.
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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
Our London guide starts at £38,000 for this type.
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First-floor extensions
Southall guide price from £30,000, Standard spec.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Southall homes. Guide from £67,000.
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Two-storey extensions for detached houses
For homes in Southall: typical guide from £103,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Southall homes. Guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
From £67,000 (plus en-suite) in Southall. Free visit to firm it up.
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 Southall
Southall 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 Southall
Do you cover Southall?
Yes. We cover Southall (UB1 and UB2) and the surrounding area, including Greenford and Heston. The first site visit is free.
What does a two-storey extension cost in Southall?
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 Southall do you cover?
Everywhere around it, including Greenford (1.5 miles), Heston (1.8 miles) and West Ealing (2.1 miles), and the rest of Greater London.