Two-storey extensions in Bournemouth
Planning a bigger home in Bournemouth? Compare extension types and guide prices below, then book a free site visit.
Bournemouth at a glance
- Postcode districts
- BH1, BH2, BH3, BH4, BH5, BH8 and nearby districts
- Area
- Dorset, England
- Price region
- South West England
- Nearest towns
- Parkstone (2.9 miles), Christchurch (4.4 miles), Canford Heath (4.4 miles), Poole (4.6 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 Bournemouth (BH1, BH2, BH3, BH4, BH5, BH8 and nearby districts) and the places around it, including Parkstone (2.9 miles), Christchurch (4.4 miles) and Canford Heath.
Extensions available in Bournemouth
Two-storey rear extensions
For homes in Bournemouth: typical guide from £57,500.
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Two-storey side extensions
Bournemouth guide price from £88,500, Standard spec.
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Two-storey wraparound extensions
Design, approvals and build for Bournemouth homes. Guide from £124,000.
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Part single, part two-storey extensions
From £74,000 in Bournemouth. Free visit to firm it up.
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Extensions over a garage
For homes in Bournemouth: typical guide from £32,500.
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First-floor extensions
From £26,000 in Bournemouth. Free visit to firm it up.
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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
Guide from £88,500 in Bournemouth, including VAT.
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Kitchen extensions with bedrooms above
Design, approvals and build for Bournemouth homes. Guide from £57,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Bournemouth guide price from £57,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Dorset, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in Dorset
- 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 Bournemouth
Bournemouth 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 Bournemouth
Do you cover Bournemouth?
Yes. We cover Bournemouth (BH1, BH2, BH3, BH4, BH5, BH8 and nearby districts) and the surrounding area, including Parkstone and Christchurch. The first site visit is free.
What does a two-storey extension cost in Bournemouth?
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 Bournemouth do you cover?
Everywhere around it, including Parkstone (2.9 miles), Christchurch (4.4 miles) and Canford Heath (4.4 miles), and the rest of Dorset.