✅ What planning permission is

✅ When you need it (and when you don’t)

✅ How the application process works

✅ How to avoid refusals and delays
 

What Is Planning Permission?

Planning permission is approval from your local council that allows you to carry out building work on your property. It ensures that your extension doesn’t negatively impact neighbours, the environment, or local policies.

Without permission, you could be forced to tear down your extension — or face fines.

Do You Always Need Planning Permission?

Not always. Some extensions fall under what’s called Permitted Development Rights. This means you can build without formal permission if your plans meet specific size, height, and location rules.

You might NOT need planning permission if:

Your extension is under 6m (or 8m for detached homes)

It doesn’t face a main road

You’re not in a conservation area or listed building

It meets height and boundary limits

However, even with permitted development, we strongly advise applying for a Lawful Development Certificate (LDC) — this proves your build is legal.

When Do You NEED Planning Permission?

• You’ll usually need full planning permission if:
• Your extension goes beyond the limits of permitted development
• You live in a flat, maisonette, or listed building
• You're in a conservation area or AONB (Area of Outstanding Natural Beauty)
• You want to build a two-storey rear or side extension

The Planning Permission Process – Step by Step

At Al-Haitham Planning Consultants, we help homeowners navigate the process from start to finish. Here’s what the typical journey looks like:

1. Initial Consultation

We assess your property and advise whether planning permission is needed.

2. Site Survey & Design

We visit your home and create accurate architectural drawings of the proposed extension.

3. Application Submission

We prepare and submit the full planning application to your local council.

4. Monitoring

We track the status of your application, deal with council queries, and provide updates.

5. Decision

You’ll usually receive a decision within 8 weeks. If approved — you’re good to go. If not, we’ll help you appeal or adjust.

Common Reasons for Refusal (and How to Avoid Them)

Planning permission can be refused due to:

• Loss of privacy or light for neighbours
• Overdevelopment of the property
• Out-of-character design
• Impact on protected trees or wildlife

Solution: Working with an expert ensures your design ticks all the right boxes and pre-empts common objections.

How We Can Help

With over 20 years of experience and a 90%+ approval rate, Al-Haitham takes the stress out of planning.

We offer:

✅ Free consultations

✅ Full planning application service

✅ Building regulation drawings

✅ Structural design & calculations

✅ 3D visualisations

Final Tips Before You Start

Always get professional drawings — they’re essential.

Talk to your neighbours early to avoid objections.

Don’t forget about building regulations — this comes after planning permission.

Need Help With Your Planning Application?

Whether you’re in Milton Keynes, London, or nearby areas — we’re here to help.
📞 Call us or 👉 Book a Free Consultation to get expert advice on your home extension today.