Weston-super-Mare house extensions
Looking to extend your home in Weston-super-Mare? Start here: extension types, guide prices for Weston-super-Mare, the planning rules that apply and how a project runs.
- Postcode districtsBS22, BS23, BS24
- Price regionSouth West England (×1.02)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Weston-super-Mare
Use these Weston-super-Mare 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) |
|---|---|---|
| Side return extensions | 11 m² | £26,500 – £34,000 |
| Double-storey extensions | 32 m² | £58,500 – £77,000 |
| Orangery extensions | 16 m² | £45,500 – £57,500 |
| Wraparound extensions | 25 m² | £58,500 – £74,000 |
| Conservatory replacement extensions | 14 m² | £30,500 – £39,500 |
| Single-storey rear extensions | 20 m² | £41,500 – £53,500 |
| Kitchen extensions | 20 m² | £42,500 – £54,500 |
Where we work near Weston-super-Mare
Our survey diary covers Weston-super-Mare, including BS22, BS23, BS24. Nearby, we also take on projects in Burnham-on-Sea (7 miles), Clevedon (8 miles), Nailsea (11 miles), Portishead (13 miles), Bridgwater (15 miles). For homes towards Gloucestershire, Kingswood is around 21 miles away.
Which extension suits a Weston-super-Mare 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.
For many houses here, pitched roof extensions, orangery extensions or annexe extensions gives the most useful space for the budget.
Approvals for an extension in Weston-super-Mare
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 two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
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).
Choose an extension type
- Utility and boot room extensions · from £14,000
- Pitched roof extensions · from £22,500
- Planning permission for extensions · from £350
- Bungalow extensions · from £26,500
- Glass box extensions · from £30,500
- Extensions over a garage · from £24,000
- Building regulations for extensions · from £900
- Side extensions · from £22,000
- Extension plans and drawings · from £1,200
- Bedroom extensions · from £26,500
- Orangery extensions · from £30,500
- Timber frame extensions · from £21,000
- Annexe extensions · from £56,000
- Flat roof extensions · from £21,000
- Wraparound extensions · from £36,500
- Double-storey extensions · from £38,500
- Single-storey rear extensions · from £21,000
- Conservatory replacement extensions · from £20,000
- Home office extensions · from £16,000
- Porch extensions · from £4,050
- Side return extensions · from £18,000
- Kitchen extensions · from £27,500
Free site visit
We visit your Weston-super-Mare home, measure up, talk through what you want and check the planning position.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
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 Weston-super-Mare
How much does an extension cost in Weston-super-Mare?
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 you cover all of Weston-super-Mare?
Yes, including the surrounding parts of Somerset. Site visits are free and there is no obligation.
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 Weston-super-Mare?
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.
Book a free site visit in Weston-super-Mare
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.