How to Get Planning Permission for Home Extensions in East Sussex

Planning a home extension in East Sussex is exciting — but before you start imagining paint colours and furniture layouts, it’s important to check if you need planning permission. Getting this right from the start can save you time, money, and unnecessary stress.

Step 1: Check If You Need Planning Permission

Not all home extensions require formal planning permission. Some projects fall under permitted development rights, meaning you can go ahead without applying — but there are strict rules on size, height, and location.

To check, visit your local council’s planning department for specific guidance in your area. You can also explore the UK Government’s official permitted development rights technical guide for clear rules and diagrams.

Some councils also publish their own Article 4 Direction notices that restrict certain developments — this is worth checking with your local planning office before starting work.

Step 2: Prepare and Submit Your Application

If you do need full permission, you’ll have to submit detailed plans — including measurements, materials, and the purpose of your extension. Many homeowners choose to work with a qualified architect or experienced builder who can prepare drawings and handle the application process for you.

For best results, consider requesting pre-application advice from your local authority. This informal feedback can help fine-tune your proposal and reduce the risk of rejection.

Step 3: Don’t Forget Building Regulations Approval

Even if your extension doesn’t need planning permission, it will almost certainly need to meet building regulations to ensure it’s safe, structurally sound, and energy efficient. You can find guidance through East Sussex Building Control.

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Your Next Step

At Hamilton-Pierce, we’ve helped countless homeowners in East Sussex transform their properties with stunning extensions — all while ensuring every step meets legal and safety requirements.

📌 View our portfolio to see how we’ve turned our clients’ ideas into reality.

💬 Read our client reviews to find out why homeowners trust us with their projects.

If you’re ready to start your extension project, get in touch today for a no-obligation consultation — we’ll guide you through planning, permissions, and the build itself.