Two-storey extensions in Banbury
Need more room in Banbury? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Banbury at a glance
- Postcode districts
- OX15 and OX16
- Area
- Oxfordshire, England
- Price region
- South East England
- Nearest towns
- Brackley (8.4 miles), Bicester (13.8 miles), Daventry (15.4 miles), Buckingham (15.7 miles)
- Distance to Oxford
- about 21.8 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 OX15 and OX16 in and around Banbury, along with neighbouring Brackley, Bicester and Daventry.
Extensions available in Banbury
Two-storey rear extensions
Design, approvals and build for Banbury homes. Guide from £61,500.
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Two-storey side extensions
Banbury guide price from £94,500, Standard spec.
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Two-storey wraparound extensions
Guide from £132,500 in Banbury, including VAT.
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Part single, part two-storey extensions
Guide from £79,000 in Banbury, including VAT.
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Extensions over a garage
From £34,500 in Banbury. Free visit to firm it up.
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First-floor extensions
From £27,500 in Banbury. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
For homes in Banbury: typical guide from £61,500.
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Two-storey extensions for detached houses
For homes in Banbury: typical guide from £94,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Banbury homes. Guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Banbury, including VAT.
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 Banbury, 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 Banbury
Banbury 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 Banbury
Do you cover Banbury?
Yes. We cover Banbury (OX15 and OX16) and the surrounding area, including Brackley and Bicester. The first site visit is free.
What does a two-storey extension cost in Banbury?
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 Banbury do you cover?
Everywhere around it, including Brackley (8.4 miles), Bicester (13.8 miles) and Daventry (15.4 miles), and the rest of Oxfordshire.