Two-storey extensions in Hailsham
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Hailsham.
Hailsham at a glance
- Postcode districts
- BN26, BN27 and TN21
- Area
- East Sussex, England
- Price region
- South East England
- Nearest towns
- Eastbourne (6.6 miles), Seaford (9.2 miles), Bexhill-on-Sea (9.3 miles), Newhaven (9.9 miles)
- Distance to Brighton
- about 17.5 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.
Hailsham sits about 17.5 miles from Brighton. Closer to home, Eastbourne is 6.6 miles away and Seaford 9.2 miles.
Extensions available in Hailsham
Two-storey rear extensions
Guide from £61,500 in Hailsham, including VAT.
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Two-storey side extensions
From £94,500 in Hailsham. Free visit to firm it up.
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Two-storey wraparound extensions
For homes in Hailsham: typical guide from £132,500.
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Part single, part two-storey extensions
Design, approvals and build for Hailsham homes. Guide from £79,000.
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Extensions over a garage
From £34,500 in Hailsham. Free visit to firm it up.
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First-floor extensions
From £27,500 in Hailsham. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Hailsham homes. Guide from £61,500.
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Two-storey extensions for detached houses
Hailsham guide price from £94,500, Standard spec.
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Kitchen extensions with bedrooms above
From £61,500 (before kitchen units) in Hailsham. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Guide from £61,500 (plus en-suite) in Hailsham, including VAT.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Hailsham, with a rough idea of the approval route and cost for each.
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 Hailsham
Hailsham 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 Hailsham
Do you cover Hailsham?
Yes. We cover Hailsham (BN26, BN27 and TN21) and the surrounding area, including Eastbourne and Seaford. The first site visit is free.
What does a two-storey extension cost in Hailsham?
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 Hailsham do you cover?
Everywhere around it, including Eastbourne (6.6 miles), Seaford (9.2 miles) and Bexhill-on-Sea (9.3 miles), and the rest of East Sussex.