Two-storey extensions in Burnham-on-Sea
We design, get approval for and build two-storey extensions in Burnham-on-Sea and the surrounding area. Choose the type of extension below or book a free site visit.
Burnham-on-Sea at a glance
- Postcode districts
- BS26, TA8 and TA9
- Area
- Somerset, England
- Price region
- South West England
- Nearest towns
- Weston-super-Mare (7.5 miles), Bridgwater (7.6 miles), Yatton (12.8 miles), Street (13.7 miles)
- Distance to Bath
- about 29 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover postcode districts BS26, TA8 and TA9 in and around Burnham-on-Sea, along with neighbouring Weston-super-Mare, Bridgwater and Yatton.
Extensions available in Burnham-on-Sea
Two-storey rear extensions
From £57,500 in Burnham-on-Sea. Free visit to firm it up.
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Two-storey side extensions
Burnham-on-Sea guide price from £88,500, Standard spec.
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Two-storey wraparound extensions
Our South West England guide starts at £124,000 for this type.
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Part single, part two-storey extensions
From £74,000 in Burnham-on-Sea. Free visit to firm it up.
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Extensions over a garage
Design, approvals and build for Burnham-on-Sea homes. Guide from £32,500.
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First-floor extensions
Our South West England guide starts at £26,000 for this type.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Burnham-on-Sea homes. Guide from £57,500.
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Two-storey extensions for detached houses
For homes in Burnham-on-Sea: typical guide from £88,500.
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Kitchen extensions with bedrooms above
Our South West England guide starts at £57,500 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
From £57,500 (plus en-suite) in Burnham-on-Sea. Free visit to firm it up.
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Burnham-on-Sea we also design annexes, home offices and bedrooms over garages.
Also available in Somerset
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Burnham-on-Sea
Burnham-on-Sea is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Burnham-on-Sea
Do you cover Burnham-on-Sea?
Yes. We cover Burnham-on-Sea (BS26, TA8 and TA9) and the surrounding area, including Weston-super-Mare and Bridgwater. The first site visit is free.
What does a two-storey extension cost in Burnham-on-Sea?
Using our South West England guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £57,500–£78,000 including VAT. An extension over a garage is about £32,500–£47,500.
Which other places near Burnham-on-Sea do you cover?
Everywhere around it, including Weston-super-Mare (7.5 miles), Bridgwater (7.6 miles) and Yatton (12.8 miles), and the rest of Somerset.