Two-storey extensions in Orpington
Planning a bigger home in Orpington? Compare extension types and guide prices below, then book a free site visit.
Orpington at a glance
- Postcode districts
- BR5 and BR6
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Farnborough (Greater London) (1.6 miles), Chelsfield (1.7 miles), Bickley (2.9 miles), Chislehurst (3.2 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.
Around Orpington we also work in Farnborough (Greater London), Chelsfield and Bickley, and across the rest of Greater London. Postcode districts in and near Orpington: BR5 and BR6.
Extensions available in Orpington
Two-storey rear extensions
From £67,000 in Orpington. Free visit to firm it up.
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Two-storey side extensions
From £103,500 in Orpington. Free visit to firm it up.
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Two-storey wraparound extensions
Guide from £144,500 in Orpington, including VAT.
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Part single, part two-storey extensions
Orpington guide price from £86,500, Standard spec.
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Extensions over a garage
Orpington guide price from £38,000, Standard spec.
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First-floor extensions
Orpington guide price from £30,000, Standard spec.
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Two-storey extensions for semi-detached houses
For homes in Orpington: typical guide from £67,000.
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Two-storey extensions for detached houses
Design, approvals and build for Orpington homes. Guide from £103,500.
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Kitchen extensions with bedrooms above
Orpington guide price from £67,000 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Orpington guide price from £67,000 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Which type suits your house in Orpington 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 Orpington
Orpington 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 Orpington
Do you cover Orpington?
Yes. We cover Orpington (BR5 and BR6) and the surrounding area, including Farnborough (Greater London) and Chelsfield. The first site visit is free.
What does a two-storey extension cost in Orpington?
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 Orpington do you cover?
Everywhere around it, including Farnborough (Greater London) (1.6 miles), Chelsfield (1.7 miles) and Bickley (2.9 miles), and the rest of Greater London.