Two-storey extensions in Greenwich
Everything for a two-storey extension in Greenwich, in one place: types, guide prices for London, the approval rules in England and how to get started.
Greenwich at a glance
- Postcode districts
- SE10
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- New Cross (1.2 miles), Blackheath (1.2 miles), Brockley (1.4 miles), Ladywell (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 SE10 in and around Greenwich, along with neighbouring New Cross, Blackheath and Brockley.
Extensions available in Greenwich
Two-storey rear extensions
Guide from £67,000 in Greenwich, including VAT.
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Two-storey side extensions
Guide from £103,500 in Greenwich, including VAT.
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Two-storey wraparound extensions
Guide from £144,500 in Greenwich, including VAT.
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Part single, part two-storey extensions
Guide from £86,500 in Greenwich, including VAT.
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Extensions over a garage
For homes in Greenwich: typical guide from £38,000.
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First-floor extensions
Greenwich guide price from £30,000, Standard spec.
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Two-storey extensions for semi-detached houses
For homes in Greenwich: typical guide from £67,000.
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Two-storey extensions for detached houses
Guide from £103,500 in Greenwich, including VAT.
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Kitchen extensions with bedrooms above
For homes in Greenwich: typical guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
Guide from £67,000 (plus en-suite) in Greenwich, including VAT.
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Greenwich we also design annexes, home offices and bedrooms over garages.
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 Greenwich
Greenwich 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 Greenwich
Do you cover Greenwich?
Yes. We cover Greenwich (SE10) and the surrounding area, including New Cross and Blackheath. The first site visit is free.
What does a two-storey extension cost in Greenwich?
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 Greenwich do you cover?
Everywhere around it, including New Cross (1.2 miles), Blackheath (1.2 miles) and Brockley (1.4 miles), and the rest of Greater London.