Thame house extensions
From a small utility to a two-storey addition, we take on house extensions throughout Thame, starting with a free visit and a planning check.
- Postcode districtsOX9
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Guide prices for Thame
We publish guide prices so you can budget before anyone visits. For Thame they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| 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 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
Where we work near Thame
Our survey diary covers Thame, including OX9. We also work in nearby Oxford (12 miles), Bicester (13 miles), Henley-on-Thames (14 miles), Abingdon (14 miles), Didcot (14 miles). Just over the Buckinghamshire border, Aylesbury is about 9 miles away.
Choosing the right extension in Thame
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.
The types we would usually look at first for a home in Thame are orangery extensions, single-storey rear extensions and double-storey extensions, depending on the garden and how the house is laid out.
Approvals for an extension in Thame
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).
Every extension type in Thame
- Wraparound extensions · from £40,000
- Conservatory replacement extensions · from £22,000
- Planning permission for extensions · from £350
- Single-storey rear extensions · from £23,500
- Timber frame extensions · from £23,500
- Flat roof extensions · from £23,500
- Kitchen extensions · from £30,000
- Annexe extensions · from £61,500
- Glass box extensions · from £33,500
- Side return extensions · from £20,000
- 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
- Bungalow extensions · from £29,000
- Side extensions · from £24,500
- Double-storey extensions · from £42,500
- Extension plans and drawings · from £1,300
- Pitched roof extensions · from £24,500
- Porch extensions · from £4,450
- Extensions over a garage · from £26,500
- Home office extensions · from £17,500
Free site visit
We visit your Thame home, measure up, talk through what you want and check the planning position.
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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
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 Thame
How much does an extension cost in Thame?
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.
Do you cover all of Thame?
Yes, including the surrounding parts of Oxfordshire. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Thame?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
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.
Book a free site visit in Thame
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.