“Planning Permission vs Permitted Development: What’s the Difference?”

If you’re planning an extension or alteration to your home, you’ll need to understand the difference between Planning Permission and Permitted Development (PD). Knowing which applies can save you time, money, and stress.

What is Planning Permission?

Planning Permission is formal approval from your local council for certain types of building work.

You’ll generally need it if your project:

• Is large or significantly alters the look of your home

• Impacts neighbours (e.g. blocking light, overlooking)

• Is in a conservation area or green belt

• Changes the use of your property

Your council will assess how your proposal fits local policies, its design quality, and its impact on the surroundings.

What is Permitted Development?

Permitted Development Rights are national rules that allow you to make certain changes without applying for full planning permission.

Examples include:

• Single-storey rear extensions within size limits

• Loft conversions with dormers

• Certain garden buildings

• Solar panels

But there are strict limits on size, height, and placement. If you stay within these rules, you don’t need to apply—but you must follow them exactly.

Key Restrictions

Permitted Development rights can be limited or removed in:

• Conservation areas

• National Parks or AONBs

• Listed buildings (you’ll need Listed Building Consent)

• Properties with an Article 4 Direction

• Flats and maisonettes (PD doesn’t usually apply)

Always check with your council before starting work.

Building Regulations Still Apply

Even if you don’t need planning permission, Building Regulations still apply. They ensure safety, energy efficiency, accessibility, and structural integrity. You’ll usually need approval from Building Control for extensions, loft conversions, and significant alterations.

Lawful Development Certificates

If your project qualifies as Permitted Development, you can apply for a Lawful Development Certificate (LDC). This isn’t permission but official confirmation that your work is lawful. It’s highly recommended, especially if you plan to sell your home in future.

Why It Matters

1. Avoid costly mistakes or enforcement action

2. Plan your budget and timeline realistically

3. Ensure your home is legal, safe, and high-quality

   
   

If you’re unsure which rules apply to your project, a professional like an architect can help you navigate the process, design within PD limits, or manage your planning application.

Thinking of extending your home? Get in touch to discuss how we can help make it smooth, legal, and beautifully designed.