Two-storey extensions in New Cross
Homeowners in New Cross can use us for the whole project or just the drawings and approvals. Start with a free visit.
New Cross at a glance
- Postcode districts
- SE8 and SE14
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Brockley (0.8 miles), Greenwich (1.2 miles), Peckham (1.4 miles), Ladywell (1.6 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 New Cross (SE8 and SE14) and the places around it, including Brockley (0.8 miles), Greenwich (1.2 miles) and Peckham.
Extensions available in New Cross
Two-storey rear extensions
Guide from £67,000 in New Cross, including VAT.
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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 New Cross, including VAT.
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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 New Cross. Free visit to firm it up.
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First-floor extensions
From £30,000 in New Cross. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Guide from £67,000 in New Cross, including VAT.
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Two-storey extensions for detached houses
Our London guide starts at £103,500 for this type.
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Kitchen extensions with bedrooms above
From £67,000 (before kitchen units) in New Cross. Free visit to firm it up.
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Extra bedroom and en-suite extensions
For homes in New Cross: typical guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in New Cross 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 New Cross
New Cross 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 New Cross
Do you cover New Cross?
Yes. We cover New Cross (SE8 and SE14) and the surrounding area, including Brockley and Greenwich. The first site visit is free.
What does a two-storey extension cost in New Cross?
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 New Cross do you cover?
Everywhere around it, including Brockley (0.8 miles), Greenwich (1.2 miles) and Peckham (1.4 miles), and the rest of Greater London.