Two-storey extensions in Clevedon
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Clevedon.
Clevedon at a glance
- Postcode districts
- BS21
- Area
- Somerset, England
- Price region
- South West England
- Nearest towns
- Yatton (4 miles), Nailsea (4.3 miles), Portishead (4.7 miles), Easton-in-Gordano (7.2 miles)
- Distance to Bath
- about 21.9 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.
Around Clevedon we also work in Yatton, Nailsea and Portishead, and across the rest of Somerset. Postcode district in and near Clevedon: BS21.
Extensions available in Clevedon

Two-storey rear extensions
Our South West England guide starts at £57,500 for this type.
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Two-storey side extensions
Guide from £88,500 in Clevedon, including VAT.
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Two-storey wraparound extensions
Guide from £124,000 in Clevedon, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Clevedon homes. Guide from £74,000.
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Extensions over a garage
For homes in Clevedon: typical 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
Clevedon guide price from £57,500, Standard spec.
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Two-storey extensions for detached houses
From £88,500 in Clevedon. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Guide from £57,500 (before kitchen units) in Clevedon, including VAT.
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Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Clevedon, including VAT.
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Clevedon we measure distances to every boundary before suggesting a type.
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 Clevedon
Clevedon 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 Clevedon
Do you cover Clevedon?
Yes. We cover Clevedon (BS21) and the surrounding area, including Yatton and Nailsea. The first site visit is free.
What does a two-storey extension cost in Clevedon?
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 Clevedon do you cover?
Everywhere around it, including Yatton (4 miles), Nailsea (4.3 miles) and Portishead (4.7 miles), and the rest of Somerset.