Burnham-on-Sea, Somerset
Single-storey rear extension in Burnham-on-Sea
Ground-floor space across the back of the house, usually for a kitchen, dining or family room. If you live in Burnham-on-Sea and want to know what a single-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Burnham-on-Sea and its postcode districts TA8 are part of our Somerset coverage. On stone and rendered houses like those around Burnham-on-Sea, a single-storey rear extension is usually the simplest way to fix a small back kitchen without touching the bedrooms.
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 Burnham-on-Sea?
In Burnham-on-Sea, our guide for a single-storey rear extension is £1,980–£3,220 per square metre including VAT for a standard specification. 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 Burnham-on-Sea?
Whether your single-storey rear extension in Burnham-on-Sea needs a planning application depends on its size, your house and any local restrictions.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it 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 Burnham-on-Sea like to extend?
Stone-built and rendered houses are common around Burnham-on-Sea, 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 Burnham-on-Sea comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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 Burnham-on-Sea
Close by, we work in Weston-super-Mare, about 7.5 miles away, and Bridgwater, about 7.6 miles away.
- Single-storey rear extension in Weston-super-Mare
- Single-storey rear extension in Bridgwater
- Single-storey rear extension in Yatton
- Single-storey rear extension in Street
- Single-storey rear extension in Wells
Other work in Burnham-on-Sea:
FAQ
Single-storey rear extension questions in Burnham-on-Sea
Can you match the brick or stone on my Burnham-on-Sea house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Can I stay in the house during the build?
Usually yes. The noisiest, dustiest stage, removing the back wall, is kept to the final weeks and screened off. Most families set up a temporary kitchen elsewhere in the house.
Do you handle building control in Burnham-on-Sea?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
What postcode areas do you cover around Burnham-on-Sea?
Including TA8, and the surrounding Somerset area.