Two-storey extensions in Littlehampton
Everything for a two-storey extension in Littlehampton, in one place: types, guide prices for South East England, the approval rules in England and how to get started.
Littlehampton at a glance
- Postcode districts
- BN17
- Area
- West Sussex, England
- Price region
- South East England
- Nearest towns
- Rustington (1.5 miles), Barnham (4.5 miles), Westergate (6 miles), Bognor Regis (6.4 miles)
- Distance to Crawley
- about 26 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 Littlehampton we also work in Rustington, Barnham and Westergate, and across the rest of West Sussex. Postcode district in and near Littlehampton: BN17.
Extensions available in Littlehampton
Two-storey rear extensions
For homes in Littlehampton: typical guide from £61,500.
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Two-storey side extensions
Guide from £94,500 in Littlehampton, including VAT.
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Two-storey wraparound extensions
From £132,500 in Littlehampton. Free visit to firm it up.
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Part single, part two-storey extensions
Design, approvals and build for Littlehampton homes. Guide from £79,000.
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Extensions over a garage
Littlehampton guide price from £34,500, Standard spec.
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First-floor extensions
Design, approvals and build for Littlehampton homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
From £61,500 in Littlehampton. Free visit to firm it up.
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Two-storey extensions for detached houses
From £94,500 in Littlehampton. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Littlehampton guide price from £61,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Our South East England guide starts at £61,500 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Which type suits your house in Littlehampton depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in West 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 Littlehampton
Littlehampton 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 Littlehampton
Do you cover Littlehampton?
Yes. We cover Littlehampton (BN17) and the surrounding area, including Rustington and Barnham. The first site visit is free.
What does a two-storey extension cost in Littlehampton?
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 Littlehampton do you cover?
Everywhere around it, including Rustington (1.5 miles), Barnham (4.5 miles) and Westergate (6 miles), and the rest of West Sussex.