Burnham-on-Sea, Somerset
Two-storey rear extension in Burnham-on-Sea
We plan and build two-storey rear extensions for homeowners in Burnham-on-Sea. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. Start with a free site visit, then a written price once the design is agreed.
Burnham-on-Sea is covered from our Somerset round, including TA8. In Somerset we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
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 two-storey rear extension cost in Burnham-on-Sea?
A two-storey rear extension in Burnham-on-Sea is priced at £1,870–£2,810 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 × 5 m footprint, two floors (30 m²) | £56,000–£84,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £90,000–£135,000 |
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 two-storey rear extension in Burnham-on-Sea?
The planning route for a two-storey rear extension in Burnham-on-Sea is set by England's householder rules and your council.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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 two-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.
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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Two-storey rear extensions near Burnham-on-Sea
Neighbouring places we cover include Weston-super-Mare (7.5 miles) and Bridgwater (7.6 miles).
- Two-storey rear extension in Weston-super-Mare
- Two-storey rear extension in Bridgwater
- Two-storey rear extension in Yatton
- Two-storey rear extension in Street
- Two-storey rear extension in Wells
Other work in Burnham-on-Sea:
FAQ
Two-storey rear extension questions in Burnham-on-Sea
Do I need planning permission for a rear extension in Burnham-on-Sea?
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.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
What is the 45-degree rule?
Many councils check that a two-storey extension does not cross a 45-degree line drawn from the nearest habitable window of the neighbouring house. We test it at the first drawing.
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.
What postcode areas do you cover around Burnham-on-Sea?
Including TA8, and the surrounding Somerset area.
Is the site visit in Burnham-on-Sea free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.