Two-storey extensions in Newhaven
Need more room in Newhaven? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Newhaven at a glance
- Postcode districts
- BN9
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Seaford (2.7 miles), Peacehaven (2.7 miles), Rottingdean (5.1 miles), Lewes (5.7 miles)
- Distance to Brighton
- about 8.8 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 BN9 in and around Newhaven, along with neighbouring Seaford, Peacehaven and Rottingdean.
Extensions available in Newhaven
Two-storey rear extensions
For homes in Newhaven: typical guide from £61,500.
Learn more
Two-storey side extensions
For homes in Newhaven: typical guide from £94,500.
Learn more
Two-storey wraparound extensions
Design, approvals and build for Newhaven homes. Guide from £132,500.
Learn more
Part single, part two-storey extensions
Our South East England guide starts at £79,000 for this type.
Learn more
Extensions over a garage
Guide from £34,500 in Newhaven, including VAT.
Learn more
First-floor extensions
For homes in Newhaven: typical guide from £27,500.
Learn more
Two-storey extensions for semi-detached houses
From £61,500 in Newhaven. Free visit to firm it up.
Learn more
Two-storey extensions for detached houses
Design, approvals and build for Newhaven homes. Guide from £94,500.
Learn more
Kitchen extensions with bedrooms above
Our South East England guide starts at £61,500 (before kitchen units) for this type.
Learn more
Extra bedroom and en-suite extensions
Design, approvals and build for Newhaven homes. Guide from £61,500 (plus en-suite).
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 Newhaven 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 Newhaven
Newhaven 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 Newhaven
Do you cover Newhaven?
Yes. We cover Newhaven (BN9) and the surrounding area, including Seaford and Peacehaven. The first site visit is free.
What does a two-storey extension cost in Newhaven?
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 Newhaven do you cover?
Everywhere around it, including Seaford (2.7 miles), Peacehaven (2.7 miles) and Rottingdean (5.1 miles), and the rest of East Sussex.