Two-storey extensions in Portswood
Need more room in Portswood? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Portswood at a glance
- Postcode districts
- SO16, SO17 and SO18
- Area
- Hampshire, England
- Price region
- South East England
- Nearest towns
- Southampton (1.7 miles), Woolston (2.4 miles), Eastleigh (3.2 miles), Bishopstoke (3.8 miles)
- Distance to Southampton
- about 1.7 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 Portswood (SO16, SO17 and SO18) and the places around it, including Southampton (1.7 miles), Woolston (2.4 miles) and Eastleigh.
Extensions available in Portswood
Two-storey rear extensions
Design, approvals and build for Portswood homes. Guide from £61,500.
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Two-storey side extensions
Design, approvals and build for Portswood homes. Guide from £94,500.
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Two-storey wraparound extensions
Our South East England guide starts at £132,500 for this type.
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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
Our South East England guide starts at £34,500 for this type.
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First-floor extensions
Our South East England guide starts at £27,500 for this type.
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Two-storey extensions for semi-detached houses
Guide from £61,500 in Portswood, including VAT.
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Two-storey extensions for detached houses
From £94,500 in Portswood. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Portswood guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Portswood, 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 Portswood 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 Portswood
Portswood 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 Portswood
Do you cover Portswood?
Yes. We cover Portswood (SO16, SO17 and SO18) and the surrounding area, including Southampton and Woolston. The first site visit is free.
What does a two-storey extension cost in Portswood?
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 Portswood do you cover?
Everywhere around it, including Southampton (1.7 miles), Woolston (2.4 miles) and Eastleigh (3.2 miles), and the rest of Hampshire.