House extensions in Tewkesbury
We design and build house extensions for homes in Tewkesbury and the surrounding Gloucestershire area, with guide prices adjusted for the region.
- Postcode districtsGL20
- Price regionSouth West England (×1.02)
- Planning rulesEngland
- Site visitFree, no obligation
Approvals for an extension in Tewkesbury
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).
What extensions cost in Tewkesbury
Use these Tewkesbury guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £41,500 – £53,500 |
| Side return extensions | 11 m² | £26,500 – £34,000 |
| Extensions over a garage | 12 m² | £25,500 – £33,500 |
| Orangery extensions | 16 m² | £45,500 – £57,500 |
| Conservatory replacement extensions | 14 m² | £30,500 – £39,500 |
Areas we cover around Tewkesbury
Site visits are available across Tewkesbury (GL20). Nearby, we also take on projects in Cheltenham (7 miles), Gloucester (9 miles), Stroud (17 miles), Cirencester (21 miles), Dursley (23 miles). For homes towards Worcestershire, Malvern is around 11 miles away.
Which extension suits a Tewkesbury home?
South West homes range from terraced streets in the cities to stone cottages and bungalows in the countryside, and conservation areas are common in historic centres.
Start by comparing orangery extensions, pitched roof extensions and single-storey rear extensions: between them they cover most of the layouts we see requested for houses like these.
Extension types and starting prices
- Side return extensions · from £18,000
- Side extensions · from £22,000
- Glass box extensions · from £30,500
- Porch extensions · from £4,050
- Flat roof extensions · from £21,000
- Kitchen extensions · from £27,500
- Orangery extensions · from £30,500
- Extension plans and drawings · from £1,200
- Bedroom extensions · from £26,500
- Bungalow extensions · from £26,500
- Double-storey extensions · from £38,500
- Conservatory replacement extensions · from £20,000
- Extensions over a garage · from £24,000
- Home office extensions · from £16,000
- Pitched roof extensions · from £22,500
- Utility and boot room extensions · from £14,000
- Single-storey rear extensions · from £21,000
- Wraparound extensions · from £36,500
- Planning permission for extensions · from £350
- Timber frame extensions · from £21,000
- Annexe extensions · from £56,000
- Building regulations for extensions · from £900
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Tewkesbury
How much does an extension cost in Tewkesbury?
Using our South West England factor (×1.02), a standard-spec single-storey extension of 20 m² is a guide £41,500 to £53,500 including VAT, and a 32 m² two-storey extension £58,500 to £77,000. Your written price follows the survey.
Do I need planning permission for an extension in Tewkesbury?
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.
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.
Book a free site visit in Tewkesbury
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.