Two-storey extensions in Bicester
Planning a bigger home in Bicester? Compare extension types and guide prices below, then book a free site visit.
Bicester at a glance
- Postcode districts
- OX6, OX25, OX26 and OX27
- Area
- Oxfordshire, England
- Price region
- South East England
- Nearest towns
- Kidlington (7.9 miles), Brackley (9.2 miles), Buckingham (9.9 miles), Oxford (11.1 miles)
- Distance to Oxford
- about 11.1 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 postcode districts OX6, OX25, OX26 and OX27 in and around Bicester, along with neighbouring Kidlington, Brackley and Buckingham.
Extensions available in Bicester
Two-storey rear extensions
Bicester guide price from £61,500, Standard spec.
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Two-storey side extensions
For homes in Bicester: typical guide from £94,500.
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Two-storey wraparound extensions
Guide from £132,500 in Bicester, including VAT.
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Part single, part two-storey extensions
For homes in Bicester: typical guide from £79,000.
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Extensions over a garage
Bicester guide price from £34,500, Standard spec.
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First-floor extensions
Guide from £27,500 in Bicester, including VAT.
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Two-storey extensions for semi-detached houses
Bicester guide price from £61,500, Standard spec.
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Two-storey extensions for detached houses
Guide from £94,500 in Bicester, including VAT.
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Kitchen extensions with bedrooms above
From £61,500 (before kitchen units) in Bicester. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Our South East England guide starts at £61,500 (plus en-suite) for this type.
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 Bicester, with a rough idea of the approval route and cost for each.
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 Bicester
Bicester 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 Bicester
Do you cover Bicester?
Yes. We cover Bicester (OX6, OX25, OX26 and OX27) and the surrounding area, including Kidlington and Brackley. The first site visit is free.
What does a two-storey extension cost in Bicester?
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 Bicester do you cover?
Everywhere around it, including Kidlington (7.9 miles), Brackley (9.2 miles) and Buckingham (9.9 miles), and the rest of Oxfordshire.