Extensions in Witney: design, planning and build
From a small utility to a two-storey addition, we take on house extensions throughout Witney, starting with a free visit and a planning check.
- Postcode districtsOX8, OX28, OX29
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Which extension suits a Witney home?
In the South East, plenty of houses have already been extended once, which makes checking the remaining permitted development allowance an important early step.
The types we would usually look at first for a home in Witney are orangery extensions, single-storey rear extensions and wraparound extensions, depending on the garden and how the house is laid out.
Planning and building control in Witney
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).
Popular extension prices in Witney
Every figure below is a guide for Witney, adjusted for South East England build costs (×1.12) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
Areas we cover around Witney
We cover Witney and the postcode districts OX8, OX28, OX29. The same team covers Carterton (5 miles), Oxford (10 miles), Abingdon (12 miles), Wantage (13 miles), Didcot (16 miles), all within easy reach. For homes towards Wiltshire, Swindon is around 20 miles away.
Every extension type in Witney
- Wraparound extensions · from £40,000
- Building regulations for extensions · from £1,000
- Timber frame extensions · from £23,500
- Side return extensions · from £20,000
- Flat roof extensions · from £23,500
- Bedroom extensions · from £29,000
- Kitchen extensions · from £30,000
- Extensions over a garage · from £26,500
- Side extensions · from £24,500
- Double-storey extensions · from £42,500
- Glass box extensions · from £33,500
- Orangery extensions · from £33,500
- Utility and boot room extensions · from £15,500
- Single-storey rear extensions · from £23,500
- Planning permission for extensions · from £350
- Home office extensions · from £17,500
- Pitched roof extensions · from £24,500
- Bungalow extensions · from £29,000
- Extension plans and drawings · from £1,300
- Conservatory replacement extensions · from £22,000
- Annexe extensions · from £61,500
- Porch extensions · from £4,450
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Witney
How much does an extension cost in Witney?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Witney, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
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.
Book a free site visit in Witney
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.