Two-storey extensions in Brighton
Homeowners in Brighton can use us for the whole project or just the drawings and approvals. Start with a free visit.
Brighton at a glance
- Postcode districts
- BN1 and BN2
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Hove (1.2 miles), Portslade (3.5 miles), Rottingdean (3.7 miles), Shoreham-by-Sea (5.9 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 Brighton we also work in Hove, Portslade and Rottingdean, and across the rest of East Sussex. Postcode districts in and near Brighton: BN1 and BN2.
Extensions available in Brighton
Two-storey rear extensions
Brighton guide price from £61,500, Standard spec.
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Two-storey side extensions
Design, approvals and build for Brighton homes. Guide from £94,500.
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Two-storey wraparound extensions
Brighton guide price from £132,500, Standard spec.
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Part single, part two-storey extensions
Guide from £79,000 in Brighton, including VAT.
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Extensions over a garage
Design, approvals and build for Brighton homes. Guide from £34,500.
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First-floor extensions
Brighton guide price from £27,500, Standard spec.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Brighton homes. Guide from £61,500.
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Two-storey extensions for detached houses
Our South East England guide starts at £94,500 for this type.
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Kitchen extensions with bedrooms above
From £61,500 (before kitchen units) in Brighton. Free visit to firm it up.
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Extra bedroom and en-suite extensions
From £61,500 (plus en-suite) in Brighton. Free visit to firm it up.
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 Brighton we measure distances to every boundary before suggesting a type.
Also available in East Sussex
- 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 Brighton
Brighton 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 Brighton
Do you cover Brighton?
Yes. We cover Brighton (BN1 and BN2) and the surrounding area, including Hove and Portslade. The first site visit is free.
What does a two-storey extension cost in Brighton?
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 Brighton do you cover?
Everywhere around it, including Hove (1.2 miles), Portslade (3.5 miles) and Rottingdean (3.7 miles), and the rest of East Sussex.