Two-storey extensions in Christchurch
We design, get approval for and build two-storey extensions in Christchurch and the surrounding area. Choose the type of extension below or book a free site visit.
Christchurch at a glance
- Postcode districts
- BH6, BH7 and BH23
- Area
- Dorset, England
- Price region
- South West England
- Nearest towns
- Bournemouth (4.4 miles), New Milton (5.2 miles), Ferndown (7.2 miles), Parkstone (7.2 miles)
- Distance to Bournemouth
- about 4.4 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.
We cover Christchurch (BH6, BH7 and BH23) and the places around it, including Bournemouth (4.4 miles), New Milton (5.2 miles) and Ferndown.
Extensions available in Christchurch
Two-storey rear extensions
From £57,500 in Christchurch. Free visit to firm it up.
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Two-storey side extensions
Our South West England guide starts at £88,500 for this type.
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Two-storey wraparound extensions
Guide from £124,000 in Christchurch, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Christchurch homes. Guide from £74,000.
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Extensions over a garage
For homes in Christchurch: typical guide from £32,500.
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First-floor extensions
From £26,000 in Christchurch. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
For homes in Christchurch: typical guide from £57,500.
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Two-storey extensions for detached houses
From £88,500 in Christchurch. Free visit to firm it up.
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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 Christchurch. Free visit to firm it up.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Christchurch, with a rough idea of the approval route and cost for each.
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 Christchurch
Christchurch 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 Christchurch
Do you cover Christchurch?
Yes. We cover Christchurch (BH6, BH7 and BH23) and the surrounding area, including Bournemouth and New Milton. The first site visit is free.
What does a two-storey extension cost in Christchurch?
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 Christchurch do you cover?
Everywhere around it, including Bournemouth (4.4 miles), New Milton (5.2 miles) and Ferndown (7.2 miles), and the rest of Dorset.