Extending your home in Carterton
Every type of house extension in Carterton, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsOX18
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Areas we cover around Carterton
Postcode districts we cover around Carterton include OX18. The same team covers Witney (5 miles), Wantage (14 miles), Oxford (14 miles), Abingdon (15 miles), Didcot (18 miles), all within easy reach. For homes towards Wiltshire, Swindon is around 16 miles away.
Planning and building control in Carterton
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Which extension suits a Carterton home?
Homes across the South East range from Victorian terraces in the older town centres to large detached houses on the edges, so the right extension type varies street by street.
For many houses here, double-storey extensions, wraparound extensions or single-storey rear extensions gives the most useful space for the budget.
Popular extension prices in Carterton
We publish guide prices so you can budget before anyone visits. For Carterton they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
Choose an extension type
- Single-storey rear extensions · from £23,500
- Home office extensions · from £17,500
- Double-storey extensions · from £42,500
- Extensions over a garage · from £26,500
- Annexe extensions · from £61,500
- Building regulations for extensions · from £1,000
- Orangery extensions · from £33,500
- Utility and boot room extensions · from £15,500
- Bedroom extensions · from £29,000
- Extension plans and drawings · from £1,300
- Planning permission for extensions · from £350
- Wraparound extensions · from £40,000
- Side return extensions · from £20,000
- Glass box extensions · from £33,500
- Conservatory replacement extensions · from £22,000
- Timber frame extensions · from £23,500
- Side extensions · from £24,500
- Porch extensions · from £4,450
- Kitchen extensions · from £30,000
- Flat roof extensions · from £23,500
- Bungalow extensions · from £29,000
- Pitched roof extensions · from £24,500
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Carterton
How much does an extension cost in Carterton?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. Your written price follows the survey.
Do you cover all of Carterton?
Yes, including the surrounding parts of Oxfordshire. Site visits are free and there is no obligation.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Carterton, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Carterton
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.