Two-storey extensions in Winchester
Need more room in Winchester? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Winchester at a glance
- Postcode districts
- SO21, SO22, SO23 and SO24
- Area
- Hampshire, England
- Price region
- South East England
- Nearest towns
- Bishopstoke (6.8 miles), Eastleigh (6.9 miles), Fair Oak (7.1 miles), Romsey (9.5 miles)
- Distance to Southampton
- about 11.7 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 SO21, SO22, SO23 and SO24 in and around Winchester, along with neighbouring Bishopstoke, Eastleigh and Fair Oak.
Extensions available in Winchester
Two-storey rear extensions
From £61,500 in Winchester. Free visit to firm it up.
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Two-storey side extensions
Our South East England guide starts at £94,500 for this type.
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Two-storey wraparound extensions
Winchester guide price from £132,500, Standard spec.
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Part single, part two-storey extensions
Our South East England guide starts at £79,000 for this type.
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Extensions over a garage
For homes in Winchester: typical guide from £34,500.
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First-floor extensions
Design, approvals and build for Winchester homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
For homes in Winchester: typical guide from £61,500.
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Two-storey extensions for detached houses
For homes in Winchester: typical guide from £94,500.
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Kitchen extensions with bedrooms above
From £61,500 (before kitchen units) in Winchester. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Winchester, 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 Winchester we measure distances to every boundary before suggesting a type.
Also available in Hampshire
- 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 Winchester
Winchester 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 Winchester
Do you cover Winchester?
Yes. We cover Winchester (SO21, SO22, SO23 and SO24) and the surrounding area, including Bishopstoke and Eastleigh. The first site visit is free.
What does a two-storey extension cost in Winchester?
Using our South East 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 £61,500–£83,000 including VAT. An extension over a garage is about £34,500–£50,500.
Which other places near Winchester do you cover?
Everywhere around it, including Bishopstoke (6.8 miles), Eastleigh (6.9 miles) and Fair Oak (7.1 miles), and the rest of Hampshire.