Two-storey extensions in Thamesmead
Homeowners in Thamesmead can use us for the whole project or just the drawings and approvals. Start with a free visit.
Thamesmead at a glance
- Postcode districts
- SE28
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Abbey Wood (1.3 miles), Belvedere (1.6 miles), Plumstead (2.1 miles), Barking (2.6 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 postcode district SE28 in and around Thamesmead, along with neighbouring Abbey Wood, Belvedere and Plumstead.
Extensions available in Thamesmead
Two-storey rear extensions
Our London guide starts at £67,000 for this type.
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Two-storey side extensions
For homes in Thamesmead: typical guide from £103,500.
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Two-storey wraparound extensions
For homes in Thamesmead: typical guide from £144,500.
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Part single, part two-storey extensions
Guide from £86,500 in Thamesmead, including VAT.
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Extensions over a garage
Our London guide starts at £38,000 for this type.
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First-floor extensions
For homes in Thamesmead: typical guide from £30,000.
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Two-storey extensions for semi-detached houses
From £67,000 in Thamesmead. Free visit to firm it up.
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Two-storey extensions for detached houses
Guide from £103,500 in Thamesmead, including VAT.
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Kitchen extensions with bedrooms above
Thamesmead guide price from £67,000 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Design, approvals and build for Thamesmead 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 Thamesmead, 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 Thamesmead
Thamesmead 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 Thamesmead
Do you cover Thamesmead?
Yes. We cover Thamesmead (SE28) and the surrounding area, including Abbey Wood and Belvedere. The first site visit is free.
What does a two-storey extension cost in Thamesmead?
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 Thamesmead do you cover?
Everywhere around it, including Abbey Wood (1.3 miles), Belvedere (1.6 miles) and Plumstead (2.1 miles), and the rest of Greater London.