Two-storey extensions in Eltham
Homeowners in Eltham can use us for the whole project or just the drawings and approvals. Start with a free visit.
Eltham at a glance
- Postcode districts
- SE9
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Mottingham (0.6 miles), Kidbrooke (1.6 miles), Lee (2.1 miles), Blackheath (2.1 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 Eltham (SE9) and the places around it, including Mottingham (0.6 miles), Kidbrooke (1.6 miles) and Lee.
Extensions available in Eltham
Two-storey rear extensions
Our London guide starts at £67,000 for this type.
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Two-storey side extensions
Guide from £103,500 in Eltham, including VAT.
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Two-storey wraparound extensions
Our London guide starts at £144,500 for this type.
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Part single, part two-storey extensions
Design, approvals and build for Eltham homes. Guide from £86,500.
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Extensions over a garage
Design, approvals and build for Eltham homes. Guide from £38,000.
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First-floor extensions
Our London guide starts at £30,000 for this type.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Eltham homes. Guide from £67,000.
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Two-storey extensions for detached houses
Eltham guide price from £103,500, Standard spec.
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Kitchen extensions with bedrooms above
For homes in Eltham: typical guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
Our London guide starts at £67,000 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Greater London, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Eltham
Eltham 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 Eltham
Do you cover Eltham?
Yes. We cover Eltham (SE9) and the surrounding area, including Mottingham and Kidbrooke. The first site visit is free.
What does a two-storey extension cost in Eltham?
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 Eltham do you cover?
Everywhere around it, including Mottingham (0.6 miles), Kidbrooke (1.6 miles) and Lee (2.1 miles), and the rest of Greater London.