Two-storey extensions in Chichester
Everything for a two-storey extension in Chichester, in one place: types, guide prices for South East England, the approval rules in England and how to get started.
Chichester at a glance
- Postcode districts
- PO18 and PO19
- Area
- West Sussex, England
- Price region
- South East England
- Nearest towns
- Westergate (4.8 miles), Bognor Regis (5.8 miles), Barnham (6.2 miles), Emsworth (6.9 miles)
- Distance to Crawley
- about 32.2 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.
Chichester sits about 32.2 miles from Crawley. Closer to home, Westergate is 4.8 miles away and Bognor Regis 5.8 miles.
Extensions available in Chichester
Two-storey rear extensions
For homes in Chichester: typical guide from £61,500.
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Two-storey side extensions
Chichester guide price from £94,500, Standard spec.
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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
Guide from £79,000 in Chichester, including VAT.
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Extensions over a garage
From £34,500 in Chichester. Free visit to firm it up.
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First-floor extensions
Design, approvals and build for Chichester homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
Guide from £61,500 in Chichester, including VAT.
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Two-storey extensions for detached houses
For homes in Chichester: typical guide from £94,500.
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Kitchen extensions with bedrooms above
Our South East England guide starts at £61,500 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
From £61,500 (plus en-suite) in Chichester. Free visit to firm it up.
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Chichester we also design annexes, home offices and bedrooms over garages.
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 Chichester
Chichester 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 Chichester
Do you cover Chichester?
Yes. We cover Chichester (PO18 and PO19) and the surrounding area, including Westergate and Bognor Regis. The first site visit is free.
What does a two-storey extension cost in Chichester?
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 Chichester do you cover?
Everywhere around it, including Westergate (4.8 miles), Bognor Regis (5.8 miles) and Barnham (6.2 miles), and the rest of West Sussex.