Two-storey extensions in Crofton Park
We design, get approval for and build two-storey extensions in Crofton Park and the surrounding area. Choose the type of extension below or book a free site visit.
Crofton Park at a glance
- Postcode districts
- SE4
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Forest Hill (0.5 miles), Ladywell (0.6 miles), Lewisham (0.7 miles), Catford (0.8 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 Crofton Park, along with neighbouring Forest Hill, Ladywell and Lewisham.
Extensions available in Crofton Park
Two-storey rear extensions
From £67,000 in Crofton Park. Free visit to firm it up.
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Two-storey side extensions
From £103,500 in Crofton Park. Free visit to firm it up.
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Two-storey wraparound extensions
Crofton Park guide price from £144,500, Standard spec.
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Part single, part two-storey extensions
Crofton Park guide price from £86,500, Standard spec.
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Extensions over a garage
Crofton Park guide price from £38,000, Standard spec.
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First-floor extensions
Design, approvals and build for Crofton Park homes. Guide from £30,000.
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Two-storey extensions for semi-detached houses
From £67,000 in Crofton Park. Free visit to firm it up.
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Two-storey extensions for detached houses
From £103,500 in Crofton Park. Free visit to firm it up.
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Kitchen extensions with bedrooms above
From £67,000 (before kitchen units) in Crofton Park. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Design, approvals and build for Crofton Park homes. Guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Crofton Park, with a rough idea of the approval route and cost for each.
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 Crofton Park
Crofton Park 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 Crofton Park
Do you cover Crofton Park?
Yes. We cover Crofton Park (SE4) and the surrounding area, including Forest Hill and Ladywell. The first site visit is free.
What does a two-storey extension cost in Crofton Park?
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 Crofton Park do you cover?
Everywhere around it, including Forest Hill (0.5 miles), Ladywell (0.6 miles) and Lewisham (0.7 miles), and the rest of Greater London.