Two-storey extensions in Oxford
Homeowners in Oxford can use us for the whole project or just the drawings and approvals. Start with a free visit.
Oxford at a glance
- Postcode districts
- OX1, OX2 and OX3
- Area
- Oxfordshire, England
- Price region
- South East England
- Nearest towns
- Cowley (2.5 miles), Kidlington (5 miles), Abingdon (5.7 miles), Didcot (9.9 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 Oxford (OX1, OX2 and OX3) and the places around it, including Cowley (2.5 miles), Kidlington (5.0 miles) and Abingdon.
Extensions available in Oxford
Two-storey rear extensions
From £61,500 in Oxford. Free visit to firm it up.
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Two-storey side extensions
From £94,500 in Oxford. Free visit to firm it up.
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Two-storey wraparound extensions
Our South East England guide starts at £132,500 for this type.
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Part single, part two-storey extensions
Design, approvals and build for Oxford homes. Guide from £79,000.
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Extensions over a garage
Oxford guide price from £34,500, Standard spec.
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First-floor extensions
Design, approvals and build for Oxford homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
For homes in Oxford: typical guide from £61,500.
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Two-storey extensions for detached houses
Our South East England guide starts at £94,500 for this type.
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Kitchen extensions with bedrooms above
From £61,500 (before kitchen units) in Oxford. Free visit to firm it up.
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Extra bedroom and en-suite extensions
From £61,500 (plus en-suite) in Oxford. Free visit to firm it up.
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Oxford we also design annexes, home offices and bedrooms over garages.
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 Oxford
Oxford 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 Oxford
Do you cover Oxford?
Yes. We cover Oxford (OX1, OX2 and OX3) and the surrounding area, including Cowley and Kidlington. The first site visit is free.
What does a two-storey extension cost in Oxford?
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 Oxford do you cover?
Everywhere around it, including Cowley (2.5 miles), Kidlington (5 miles) and Abingdon (5.7 miles), and the rest of Oxfordshire.