Two-storey extensions in Chew Magna
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Chew Magna.
Chew Magna at a glance
- Postcode districts
- BS13
- Area
- Bristol, England
- Price region
- South West England
- Nearest towns
- Dundry (2.6 miles), Publow (3 miles), Bishopsworth (3.4 miles), Whitchurch (Bristol) (3.4 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 Chew Magna we also work in Dundry, Publow and Bishopsworth, and across the rest of Bristol. Postcode district in and near Chew Magna: BS13.
Extensions available in Chew Magna

Two-storey rear extensions
For homes in Chew Magna: typical guide from £57,500.
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Two-storey side extensions
Design, approvals and build for Chew Magna homes. Guide from £88,500.
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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
Design, approvals and build for Chew Magna homes. Guide from £74,000.
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Extensions over a garage
Chew Magna guide price from £32,500, Standard spec.
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First-floor extensions
Design, approvals and build for Chew Magna homes. Guide from £26,000.
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Two-storey extensions for semi-detached houses
Our South West England guide starts at £57,500 for this type.
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Two-storey extensions for detached houses
Design, approvals and build for Chew Magna homes. Guide from £88,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Chew Magna homes. Guide from £57,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Chew Magna, 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 Chew Magna we measure distances to every boundary before suggesting a type.
Also available in Bristol
- 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 Chew Magna
Chew Magna 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 Chew Magna
Do you cover Chew Magna?
Yes. We cover Chew Magna (BS13) and the surrounding area, including Dundry and Publow. The first site visit is free.
What does a two-storey extension cost in Chew Magna?
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 Chew Magna do you cover?
Everywhere around it, including Dundry (2.6 miles), Publow (3 miles) and Bishopsworth (3.4 miles), and the rest of Bristol.