Two-storey extensions in Thame
Homeowners in Thame can use us for the whole project or just the drawings and approvals. Start with a free visit.
Thame at a glance
- Postcode districts
- OX9 and OX39
- Area
- Oxfordshire, England
- Price region
- South East England
- Nearest towns
- Aylesbury (8.4 miles), Cowley (9.9 miles), Oxford (12 miles), Wallingford (12.1 miles)
- Distance to Oxford
- about 12 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.
Around Thame we also work in Aylesbury, Cowley and Oxford, and across the rest of Oxfordshire. Postcode districts in and near Thame: OX9 and OX39.
Extensions available in Thame
Two-storey rear extensions
Our South East England guide starts at £61,500 for this type.
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Two-storey side extensions
Design, approvals and build for Thame homes. Guide from £94,500.
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Two-storey wraparound extensions
For homes in Thame: typical guide from £132,500.
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Part single, part two-storey extensions
Design, approvals and build for Thame homes. Guide from £79,000.
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Extensions over a garage
For homes in Thame: typical guide from £34,500.
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First-floor extensions
Guide from £27,500 in Thame, including VAT.
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Two-storey extensions for semi-detached houses
Our South East England guide starts at £61,500 for this type.
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Two-storey extensions for detached houses
Guide from £94,500 in Thame, including VAT.
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Kitchen extensions with bedrooms above
Guide from £61,500 (before kitchen units) in Thame, including VAT.
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Extra bedroom and en-suite extensions
For homes in Thame: typical guide from £61,500 (plus en-suite).
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Thame we measure distances to every boundary before suggesting a type.
Also available in Oxfordshire
- 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 Thame
Thame 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 Thame
Do you cover Thame?
Yes. We cover Thame (OX9 and OX39) and the surrounding area, including Aylesbury and Cowley. The first site visit is free.
What does a two-storey extension cost in Thame?
Using our South East England 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 £61,500–£83,000 including VAT. An extension over a garage is about £34,500–£50,500.
Which other places near Thame do you cover?
Everywhere around it, including Aylesbury (8.4 miles), Cowley (9.9 miles) and Oxford (12 miles), and the rest of Oxfordshire.