Two-storey extensions in Eastbourne
Need more room in Eastbourne? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Eastbourne at a glance
- Postcode districts
- BN20, BN21, BN22, BN23 and BN24
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Hailsham (6.6 miles), Seaford (7.9 miles), Bexhill-on-Sea (9.9 miles), Newhaven (10.2 miles)
- Distance to Brighton
- about 19 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 Eastbourne we also work in Hailsham, Seaford and Bexhill-on-Sea, and across the rest of East Sussex. Postcode districts in and near Eastbourne: BN20, BN21, BN22, BN23 and BN24.
Extensions available in Eastbourne
Two-storey rear extensions
For homes in Eastbourne: typical guide from £61,500.
Learn more
Two-storey side extensions
Design, approvals and build for Eastbourne homes. Guide from £94,500.
Learn more
Two-storey wraparound extensions
From £132,500 in Eastbourne. Free visit to firm it up.
Learn more
Part single, part two-storey extensions
For homes in Eastbourne: typical guide from £79,000.
Learn more
Extensions over a garage
Guide from £34,500 in Eastbourne, including VAT.
Learn more
First-floor extensions
Our South East England guide starts at £27,500 for this type.
Learn more
Two-storey extensions for semi-detached houses
Design, approvals and build for Eastbourne homes. Guide from £61,500.
Learn more
Two-storey extensions for detached houses
Eastbourne guide price from £94,500, Standard spec.
Learn more
Kitchen extensions with bedrooms above
For homes in Eastbourne: typical guide from £61,500 (before kitchen units).
Learn more
Extra bedroom and en-suite extensions
From £61,500 (plus en-suite) in Eastbourne. 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 Eastbourne 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 Eastbourne
Eastbourne 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 Eastbourne
Do you cover Eastbourne?
Yes. We cover Eastbourne (BN20, BN21, BN22, BN23 and BN24) and the surrounding area, including Hailsham and Seaford. The first site visit is free.
What does a two-storey extension cost in Eastbourne?
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 Eastbourne do you cover?
Everywhere around it, including Hailsham (6.6 miles), Seaford (7.9 miles) and Bexhill-on-Sea (9.9 miles), and the rest of East Sussex.