Planning permission rules trip up more UK homeowners than almost any other part of a renovation, mainly because the answer depends on the exact project, your property type, and even where you live. This guide breaks down the most common home improvement projects so you can quickly check where you likely stand.
Do I Need Planning Permission?
Many common home improvements in the UK fall under permitted development rights and do not need planning permission, provided they stay within set size and height limits, but extensions beyond those limits, new dwellings, and any work on a listed building almost always require a full application. If you are ever unsure, contacting your local planning authority directly is the only way to be certain for your specific property.
What Is Permitted Development?
Permitted development rights allow certain building works to go ahead without a full planning application, as long as the work meets specific conditions set out in the General Permitted Development Order. If your project meets every condition, you do not need to apply. If it exceeds even one limit, such as height or footprint, you will usually need full planning permission instead.
Common Projects: Do You Need Permission?
| Project | Usually needs permission? | Key condition |
|---|---|---|
| Single-storey rear extension | Often not, under permitted development | Must stay within set depth limits (typically 3m attached, 4m detached) |
| Loft conversion (rooflight) | Often not | Must not extend beyond the existing roof plane at the front |
| Garden shed or outbuilding | Often not | Must not exceed 4m in height and cannot cover more than half the garden |
| Solar panels | Often not | Must not protrude more than 200mm from the roof plane |
| New dwelling or self-build | Almost always yes | Full planning application required in nearly all cases |
| Work on a listed building | Almost always yes | Listed Building Consent required, separate from planning permission |
| Garden decking or raised platform | Depends on height | Platforms over 300mm high, or close to a boundary, usually need permission |
Where Permitted Development Does Not Apply
Permitted development rights can be restricted or removed entirely in certain situations, including conservation areas, national parks, and properties covered by an Article 4 direction, where a local authority has specifically withdrawn some permitted development rights for that area. If your property falls into any of these categories, checking with your local planning authority before starting work is essential, since the usual permitted development limits may not apply to you.
Planning Permission Versus Building Regulations
These are two separate approvals, and a project can need one, both, or neither. Planning permission concerns whether a project is allowed to happen at all, based on its impact on the surrounding area. Building regulations concern how the work is actually built, covering structural safety, fire safety, insulation, and ventilation. Even a project that does not need planning permission, such as a permitted development extension, will still usually need to meet building regulations and receive a completion certificate.
How to Check for Your Specific Property
- Use the Planning Portal’s interactive house tool: a free online guide covering the most common projects.
- Contact your local planning authority directly: most councils offer a duty planning officer service for quick questions.
- Consider a pre-application enquiry: for a fee, typically £100 to £300 depending on the council, you can get written advice on your specific project before submitting a full application.
- Check for an Article 4 direction: your local council’s website will confirm whether your specific street or area has restricted permitted development rights.
If your project does need a full application, our home extension cost guide and loft conversion cost guide cover typical pricing once permission is confirmed.
What Happens If You Build Without Permission?
Building without required planning permission can result in an enforcement notice, requiring you to undo the work, and can complicate selling the property later, since buyers’ solicitors routinely check for unauthorised development. In some cases, unauthorised work becomes immune from enforcement after four to ten years depending on the type of breach, but relying on this is a significant risk rather than a reliable strategy, and it is always safer to check before you build.
Frequently Asked Questions
How do I find out if my project needs planning permission?
The Planning Portal’s interactive house tool covers most common projects, but contacting your local planning authority directly is the most reliable way to confirm for your specific property.
Do I need planning permission for a garden shed?
Usually not, provided it stays within permitted development limits, typically no higher than 4 metres and not covering more than half the garden area. Sheds close to a boundary or on designated land may have tighter limits.
What is an Article 4 direction?
An Article 4 direction is a local authority decision that removes some permitted development rights in a specific area, meaning projects that would normally not need planning permission may require a full application there instead.
How long does planning permission last once granted?
Planning permission in the UK is typically valid for three years from the date it is granted, after which work must have started or a new application may be needed.
Can I apply for planning permission on land I do not own?
Yes, you can submit an application on land you do not own, but the submission must include the correct ownership certificate confirming the land’s ownership status.
Planning rules can vary by local authority and change over time. This article is general guidance, not legal advice, and does not cover Scotland, Wales, or Northern Ireland, which have separate planning systems. Always confirm requirements with your local planning authority before starting work.
About the Author
Spire Homes Editorial Team researches and writes practical, UK focused home improvement guides covering renovation planning, financing, interior design, and property maintenance. Our content is reviewed for accuracy and updated as guidance changes.
