West Sussex · BN11, BN12, BN13, BN14
Extensions in Worthing
A home extension adds new floor space to an existing property — commonly a rear or side-return kitchen extension, a wraparound, or a first-floor addition — and typically involves planning or permitted development approval, Building Regulations, and coordination of groundworks, structure, roofing and internal finishing.
In Worthing, that covers Tarring, Broadwater, Durrington, Goring-by-Sea, Findon Valley, Heene. Worthing is a seafront town with a strong Edwardian and interwar residential character, notable Art Deco buildings along the seafront, and a wide range of housing types stretching inland towards the South Downs.
Coverage
Areas we cover in Worthing for extensions
Property styles in Worthing
Edwardian and interwar semis and terraces make up much of the town's core housing stock, with Art Deco apartment buildings along parts of the seafront and postwar estates further inland. Rear extensions and loft conversions are common on the bay-fronted terraced and semi-detached housing typical of the town.
Planning considerations
Adur & Worthing Councils act as the local planning authority. Several seafront and town centre areas are conservation areas with notable Art Deco buildings, some of which are listed, affecting alterations to elevations and windows.
How it works
Our extensions process
- 01
Feasibility and survey
Assessing what is achievable on the plot, including boundary conditions, trees, drainage and neighbouring properties.
- 02
Design
Developing layout and elevations that work with the existing house, in scale and materials.
- 03
Planning route
Establishing whether the extension falls under permitted development or requires a full planning application, and submitting accordingly.
- 04
Party wall matters
Serving party wall notices where the extension is near a boundary, ahead of any groundworks starting.
- 05
Construction
Groundworks, structure, roof, and first fix through to decoration, with the existing house kept weathertight throughout.
- 06
Completion
Building Control sign-off, snagging list and handover.
Also in this area
Other services we provide in Worthing
Nearby coverage
Extensions in nearby areas
FAQs
Extensions in Worthing: FAQs
Do you provide extensions across all of Worthing?
Yes, we cover the BN11 and BN12 and BN13 and BN14 postcode areas in full, including Tarring, Broadwater, Durrington, Goring-by-Sea, Findon Valley, Heene.
Do I need planning permission for a rear extension?
Many single-storey rear extensions fall under permitted development if they meet size, height and boundary criteria. Larger extensions, those on designated land, or properties where permitted development rights have been removed, need a full planning application. We assess this during the feasibility stage.
What is a party wall notice and do I need one?
If your extension involves work at or near a shared boundary, the Party Wall etc. Act 1996 usually requires you to notify your neighbour before work starts. We flag this during design so notices can be served in good time.
Are Worthing's seafront buildings protected?
Many of the town's notable Art Deco and Edwardian seafront buildings are listed or within conservation areas, which affects what external changes can be made without consent. We check this for individual properties.
Get a quote for extensions in Worthing
Tell us about the property and what you have in mind, and we'll arrange a site visit.
Last reviewed 2026-07-19.