Planning permission in Worthing catches homeowners out more than most people expect. You might assume a simple extension or loft conversion falls neatly under permitted development — but whether it does depends on factors specific to your property, your street, and sometimes your immediate neighbours. WhatCanIBuild exists precisely because that gap between "I think it's fine" and "I know it's fine" is where expensive mistakes happen.
The short version
- Worthing has 26 conservation areas where standard permitted development rules don't apply in the same way
- 8 Article 4 directions affect specific streets — removing rights most homeowners assume they have
- Properties near or within the South Downs National Park face tighter restrictions on external alterations
- 434 listed buildings recorded across the borough — and listed status affects far more than the building itself
The conservation area problem
Worthing has 26 conservation areas spread across the borough. Most homeowners know vaguely that conservation areas exist — fewer realise exactly how much that changes what they can do without permission. Cladding, rendering, replacing windows, roof alterations — the list of things that require a full application in a conservation area is longer than most people expect. And it's not just about whether your property sits inside a conservation area boundary. Works that affect the character of the area can bring your project into scope even when you're confident you're building on your own land.
Article 4 directions — the rules that override your assumptions
Eight Article 4 directions operate across specific streets in Worthing. These directions exist to remove permitted development rights that would otherwise apply nationally. In practice, that means some homeowners in Worthing need planning permission for work their neighbours a few streets away could do freely. Most homeowners don't realise an Article 4 direction applies to their property until they've already started planning — or worse, started building. Whether your street is affected isn't something you can guess from a postcode alone.
Check before you assume
Article 4 directions are street-specific. Being outside a conservation area doesn't mean your permitted development rights are intact. The best way to know what applies to your address is to check it directly.
The South Downs boundary — closer than you think
Worthing borders the South Downs National Park, and properties in or near that boundary sit on what's known as Article 1(5) land. Here, permitted development rights are more restricted than in standard residential areas. Even if your property doesn't feel rural, its classification on a planning map may trigger requirements you wouldn't expect. A rear extension that's straightforward in central Worthing might need prior approval — or full permission — elsewhere in the same borough.
Listed buildings and the ripple effect
Worthing has 434 listed buildings. If your property is listed, almost any external alteration — and many internal ones — requires listed building consent on top of any planning permission. But it's not just owners of listed buildings who need to think carefully. Works to properties in close proximity to a listed building can also come under scrutiny. Most homeowners don't realise how wide that net can be cast.
What actually matters for your project
Knowing Worthing has conservation areas and Article 4 directions is one thing. Knowing what those constraints mean for your specific extension, outbuilding, or conversion — and whether similar projects nearby have been approved or refused — is another. WhatCanIBuild shows you what's been approved and refused for comparable projects near your address, so you're not just guessing based on general rules that may or may not apply to you.
The combination of constraints on any individual Worthing property — conservation area status, Article 4 coverage, proximity to the National Park, listed building status — creates a picture that's unique to your address. WhatCanIBuild pulls that picture together so you can see your actual position before you commit time and money to a project that might not go the way you expect.
These rules vary by property
Conservation areas, Article 4 directions, and other constraints can change everything. Check what actually applies to your address.
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