Planning Permission vs Permitted Development (UK): Key Differences Explained

If you're planning home improvements—or concerned about building work happening next door—understanding the difference between planning permission and permitted development rights (PDR) is essential.

In the UK, not all building work requires formal approval, but all work must comply with planning rules. This guide explains the key differences, when each applies, and how neighbours can check whether a project has been properly approved.

What Is Planning Permission?

Planning permission is formal approval granted by your Local Planning Authority (LPA) for building work or changes in land use.

When Do You Need Planning Permission?

You will usually need planning permission if your project:

• Involves large extensions or major structural changes

• Changes the use of a property (e.g., house to flats)

• Affects a listed building or is in a conservation area

• Exceeds permitted development size or height limits

Planning Permission Process (UK)

The process typically includes:

• Submitting architectural plans and drawings

• Paying a planning application fee

• Public consultation (neighbours are notified)

• Review by planning officers

• Decision within ~8–12 weeks

What Is Permitted Development?

Permitted Development Rights (PDR) allow homeowners to carry out certain improvements without needing full planning permission.

These rights are set nationally but enforced locally.

Common Permitted Development Examples

• Rear extensions within size limits

• Loft conversions (within volume restrictions)

• Garden rooms, sheds, or outbuildings

• Porches and conservatories (within limits)

Permitted Development Rules

To qualify, projects must:

• Stay within strict size and height limits

• Not cover excessive garden space

• Avoid front-facing alterations (in many cases)

• Comply with restrictions in protected areas

Important: If rules are breached, planning permission may still be required.

Planning Permission vs Permitted Development: Key Differences

‍

What Is a Lawful Development Certificate (LDC)?

A Lawful Development Certificate (LDC) is official confirmation from the council that a project is legal under permitted development rules.

Why Homeowners Apply for an LDC

• Proof the work is lawful

• Avoid disputes with neighbours

• Required by buyers/solicitors when selling

• Peace of mind before starting work

‍

How Neighbours Can Check Planning Permission in the UK

If you're wondering “How can I check if my neighbour has planning permission?”, here are the key steps:

1. Search the Local Planning Portal

Visit your council’s website and:

• Search by property address

• View planning applications and decisions

• Access drawings and documents

If planning permission is required, it must appear here.

2. Check for a Lawful Development Certificate

If no planning application is listed:

• Look for an LDC (Lawful Development Certificate)

• This confirms the council has reviewed the work

3. Look for Neighbour Notifications

For planning applications:

• You should receive a notification letter

• A site notice may be displayed nearby

No notification may indicate permitted development.

4. Contact the Local Planning Authority

Still unsure? You can:

• Contact the planning department directly

• Provide the property address

• Request confirmation of approval or compliance

What If There Is No Record of Approval?

If you can’t find planning permission or an LDC:

• The work may still fall under permitted development

• Or it could be unauthorised

What You Can Do

• Speak with your neighbour politely

• Ask if they have documentation

• Contact planning enforcement if concerned

Why Understanding Planning Rules Matters

Knowing the difference between planning permission and permitted development helps:

• Avoid neighbour disputes

• Ensure legal compliance

• Protect property value

• Maintain local planning standards

Final Thoughts

Whether you're a homeowner planning an extension or a neighbour seeking reassurance, understanding UK planning rules is crucial.

Not all building work requires planning permission—but all work must follow the law.

Pro Tip: Always check your local council’s planning portal first—it’s the quickest way to confirm whether a project has been approved.

FAQs

Do all extensions need planning permission in the UK?

No. Many smaller extensions fall under permitted development, provided they meet size and design limits.

Can neighbours object to permitted development?

No formal objection process exists, but concerns can be raised with the council if rules are being breached.

Is a Lawful Development Certificate required?

Not legally required but strongly recommended for proof and future property sales.

‍