Home extensions in Chichester
More space without moving: we plan and build extensions across Chichester, with one team for the drawings, the council and the build.
- Postcode districtsPO18, PO19
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Chichester need planning permission?
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Choosing the right extension in Chichester
Homes across the South East range from Victorian terraces in the older town centres to large detached houses on the edges, so the right extension type varies street by street.
Depending on the plot, double-storey extensions and single-storey rear extensions are often the strongest options, with wraparound extensions worth considering where there is room.
What extensions cost in Chichester
Every figure below is a guide for Chichester, adjusted for South East England build costs (×1.12) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
Chichester and surrounding towns
Postcode districts we cover around Chichester include PO18, PO19. We also work in nearby Bognor Regis (6 miles), Emsworth (7 miles), Littlehampton (11 miles), Worthing (18 miles), Lancing (20 miles). Just over the Hampshire border, Havant is about 9 miles away.
All extension types we build in Chichester
- Planning permission for extensions · from £350
- Side return extensions · from £20,000
- Timber frame extensions · from £23,500
- Wraparound extensions · from £40,000
- Extension plans and drawings · from £1,300
- Double-storey extensions · from £42,500
- Side extensions · from £24,500
- Pitched roof extensions · from £24,500
- Flat roof extensions · from £23,500
- Annexe extensions · from £61,500
- Porch extensions · from £4,450
- Conservatory replacement extensions · from £22,000
- Bungalow extensions · from £29,000
- Bedroom extensions · from £29,000
- Extensions over a garage · from £26,500
- Glass box extensions · from £33,500
- Single-storey rear extensions · from £23,500
- Kitchen extensions · from £30,000
- Utility and boot room extensions · from £15,500
- Building regulations for extensions · from £1,000
- Orangery extensions · from £33,500
- Home office extensions · from £17,500
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Chichester
How much does an extension cost in Chichester?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. Your written price follows the survey.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Chichester, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Chichester?
Yes, including the surrounding parts of West Sussex. Site visits are free and there is no obligation.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Book a free site visit in Chichester
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.