Extensions in Abingdon: design, planning and build
Looking to extend your home in Abingdon? Start here: extension types, guide prices for Abingdon, the planning rules that apply and how a project runs.
- Postcode districtsOX14
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Planning rules in Abingdon
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 return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
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).
Where we work near Abingdon
Site visits are available across Abingdon (OX14). The same team covers Didcot (5 miles), Oxford (6 miles), Wantage (8 miles), Witney (12 miles), Thame (14 miles), all within easy reach. Thatcham, in Berkshire, is roughly 19 miles from Abingdon and also on our list.
Guide prices for Abingdon
We publish guide prices so you can budget before anyone visits. For Abingdon they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
What works best for Abingdon houses?
The South East has a broad mix of 1930s semis, post-war estates, newer developments and period cottages, and many houses have enough garden for a generous rear extension.
Depending on the plot, wraparound extensions and double-storey extensions are often the strongest options, with orangery extensions worth considering where there is room.
Every extension type in Abingdon
- Orangery extensions · from £33,500
- Side return extensions · from £20,000
- Porch extensions · from £4,450
- Single-storey rear extensions · from £23,500
- Conservatory replacement extensions · from £22,000
- Glass box extensions · from £33,500
- Timber frame extensions · from £23,500
- Wraparound extensions · from £40,000
- Side extensions · from £24,500
- Annexe extensions · from £61,500
- Building regulations for extensions · from £1,000
- Planning permission for extensions · from £350
- Utility and boot room extensions · from £15,500
- Extension plans and drawings · from £1,300
- Extensions over a garage · from £26,500
- Pitched roof extensions · from £24,500
- Bedroom extensions · from £29,000
- Kitchen extensions · from £30,000
- Home office extensions · from £17,500
- Double-storey extensions · from £42,500
- Flat roof extensions · from £23,500
- Bungalow extensions · from £29,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Abingdon
How much does an extension cost in Abingdon?
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.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
How long does an extension take in Abingdon?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Abingdon
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.