Two-storey extensions in Brockley
Planning a bigger home in Brockley? Compare extension types and guide prices below, then book a free site visit.
Brockley at a glance
- Postcode districts
- SE4
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- New Cross (0.8 miles), Crofton Park (0.8 miles), Ladywell (0.9 miles), Forest Hill (1.2 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 postcode district SE4 in and around Brockley, along with neighbouring New Cross, Crofton Park and Ladywell.
Extensions available in Brockley
Two-storey rear extensions
Guide from £67,000 in Brockley, including VAT.
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Two-storey side extensions
Design, approvals and build for Brockley homes. Guide from £103,500.
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Two-storey wraparound extensions
For homes in Brockley: typical guide from £144,500.
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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
From £38,000 in Brockley. Free visit to firm it up.
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First-floor extensions
Brockley guide price from £30,000, Standard spec.
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Two-storey extensions for semi-detached houses
From £67,000 in Brockley. Free visit to firm it up.
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Two-storey extensions for detached houses
Guide from £103,500 in Brockley, including VAT.
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Kitchen extensions with bedrooms above
For homes in Brockley: typical 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 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 Brockley
Brockley 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 Brockley
Do you cover Brockley?
Yes. We cover Brockley (SE4) and the surrounding area, including New Cross and Crofton Park. The first site visit is free.
What does a two-storey extension cost in Brockley?
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 Brockley do you cover?
Everywhere around it, including New Cross (0.8 miles), Crofton Park (0.8 miles) and Ladywell (0.9 miles), and the rest of Greater London.