Two-storey extensions in Rottingdean
Planning a bigger home in Rottingdean? Compare extension types and guide prices below, then book a free site visit.
Rottingdean at a glance
- Postcode districts
- BN2
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Peacehaven (2.6 miles), Brighton (3.7 miles), Hove (4.9 miles), Newhaven (5.1 miles)
- Distance to Brighton
- about 3.7 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 district BN2 in and around Rottingdean, along with neighbouring Peacehaven, Brighton and Hove.
Extensions available in Rottingdean
Two-storey rear extensions
Our South East England guide starts at £61,500 for this type.
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Two-storey side extensions
From £94,500 in Rottingdean. Free visit to firm it up.
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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
From £79,000 in Rottingdean. Free visit to firm it up.
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Extensions over a garage
Guide from £34,500 in Rottingdean, including VAT.
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First-floor extensions
Rottingdean guide price from £27,500, Standard spec.
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Two-storey extensions for semi-detached houses
Our South East England guide starts at £61,500 for this type.
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Two-storey extensions for detached houses
For homes in Rottingdean: typical guide from £94,500.
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Kitchen extensions with bedrooms above
Rottingdean guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
From £61,500 (plus en-suite) in Rottingdean. Free visit to firm it up.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in East Sussex, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Rottingdean
Rottingdean 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 Rottingdean
Do you cover Rottingdean?
Yes. We cover Rottingdean (BN2) and the surrounding area, including Peacehaven and Brighton. The first site visit is free.
What does a two-storey extension cost in Rottingdean?
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 Rottingdean do you cover?
Everywhere around it, including Peacehaven (2.6 miles), Brighton (3.7 miles) and Hove (4.9 miles), and the rest of East Sussex.