Two-storey extensions in Bromley
We design, get approval for and build two-storey extensions in Bromley and the surrounding area. Choose the type of extension below or book a free site visit.
Bromley at a glance
- Postcode districts
- BR1
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Shortlands (0.6 miles), Bickley (1.4 miles), Beckenham (1.7 miles), Chislehurst (2.5 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.
We cover postcode district BR1 in and around Bromley, along with neighbouring Shortlands, Bickley and Beckenham.
Extensions available in Bromley
Two-storey rear extensions
For homes in Bromley: typical guide from £67,000.
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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
Guide from £144,500 in Bromley, including VAT.
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Part single, part two-storey extensions
Bromley guide price from £86,500, Standard spec.
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Extensions over a garage
For homes in Bromley: typical guide from £38,000.
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First-floor extensions
Guide from £30,000 in Bromley, including VAT.
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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
For homes in Bromley: typical guide from £103,500.
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Kitchen extensions with bedrooms above
From £67,000 (before kitchen units) in Bromley. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Design, approvals and build for Bromley homes. Guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Bromley depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
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 Bromley
Bromley 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 Bromley
Do you cover Bromley?
Yes. We cover Bromley (BR1) and the surrounding area, including Shortlands and Bickley. The first site visit is free.
What does a two-storey extension cost in Bromley?
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 Bromley do you cover?
Everywhere around it, including Shortlands (0.6 miles), Bickley (1.4 miles) and Beckenham (1.7 miles), and the rest of Greater London.