Weston-super-Mare, Somerset
Single-storey rear extension in Weston-super-Mare
For homes in Weston-super-Mare, a single-storey rear extension is often the simplest way to gain space without moving. Ground-floor space across the back of the house, usually for a kitchen, dining or family room. We take it from survey to completion certificate.
Weston-super-Mare and its postcode districts BS22 and BS23 are part of our Somerset coverage. A depth of 3 to 4 metres keeps many single-storey rear extensions in Weston-super-Mare within permitted development, subject to the house's planning history.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a single-storey rear extension cost in Weston-super-Mare?
A single-storey rear extension in Weston-super-Mare is priced at £1,980–£3,220 per square metre including VAT as a guide, before kitchen fit-out and fees. South West prices run slightly above our West Midlands baseline; natural stone to match the house is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £23,500–£38,500 |
| 4 m wide × 5 m deep (20 m²) | £39,500–£64,500 |
| 4 m wide × 6 m deep (24 m²) | £47,500–£77,500 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a single-storey rear extension in Weston-super-Mare?
The planning route for a single-storey rear extension in Weston-super-Mare is set by England's householder rules and your council.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Weston-super-Mare like to extend?
Stone-built and rendered houses are common around Weston-super-Mare, so matching the walling is a design decision in its own right: natural stone, reconstituted stone or a render finish across old and new.
How a single-storey rear extension in Weston-super-Mare comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Single-storey rear extensions near Weston-super-Mare
We also build single-storey rear extensions in nearby Yatton (7.2 miles) and Burnham-on-Sea (7.5 miles).
- Single-storey rear extension in Yatton
- Single-storey rear extension in Burnham-on-Sea
- Single-storey rear extension in Clevedon
- Single-storey rear extension in Penarth
- Single-storey rear extension in Nailsea
Other work in Weston-super-Mare:
FAQ
Single-storey rear extension questions in Weston-super-Mare
How long does a rear extension take to build in Weston-super-Mare?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can you match the brick or stone on my Weston-super-Mare house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Will the extension make the room behind it dark?
Not if it is designed well. Rooflights or a lantern over the old back room, and a wide opening into it, keep daylight reaching the middle of the house.
What postcode areas do you cover around Weston-super-Mare?
Including BS22 and BS23, and the surrounding Somerset area.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do I need planning permission for a rear extension in Weston-super-Mare?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.