Two-storey extensions in Carterton
We design, get approval for and build two-storey extensions in Carterton and the surrounding area. Choose the type of extension below or book a free site visit.
Carterton at a glance
- Postcode districts
- OX18
- Area
- Oxfordshire, England
- Price region
- South East England
- Nearest towns
- Witney (5 miles), Kidlington (13.8 miles), Wantage (13.8 miles), Oxford (14.5 miles)
- Distance to Oxford
- about 14.5 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 Carterton we also work in Witney, Kidlington and Wantage, and across the rest of Oxfordshire. Postcode district in and near Carterton: OX18.
Extensions available in Carterton
Two-storey rear extensions
Guide from £61,500 in Carterton, including VAT.
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Two-storey side extensions
Carterton guide price from £94,500, Standard spec.
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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
Carterton guide price from £79,000, Standard spec.
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Extensions over a garage
From £34,500 in Carterton. Free visit to firm it up.
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First-floor extensions
Design, approvals and build for Carterton homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Carterton homes. Guide from £61,500.
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Two-storey extensions for detached houses
From £94,500 in Carterton. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Carterton guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Carterton, including VAT.
Learn moreWhich type suits your house?
Rear and side extensions suit most semi-detached and detached houses with room around them. Terraced and town-centre homes can take a two-storey extension too, with more care over neighbours, light and access.
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 Carterton
Carterton 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 Carterton
Do you cover Carterton?
Yes. We cover Carterton (OX18) and the surrounding area, including Witney and Kidlington. The first site visit is free.
What does a two-storey extension cost in Carterton?
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 Carterton do you cover?
Everywhere around it, including Witney (5 miles), Kidlington (13.8 miles) and Wantage (13.8 miles), and the rest of Oxfordshire.