In many cases, single storey rear extensions can be built without needing full planning permission in the UK under permitted development rights. Here’s what you need to know about when you can utilize these more flexible rules for your extension project.
What Are Permitted Development Rights?
Permitted development rights are a set of national planning regulations that allow homeowners to make certain changes to their property without having to apply for full planning permission. Permitted development covers common projects like rear extensions, porches, sheds and loft conversions.
Rules for Single Storey Rear Extensions
For a single storey rear extension to qualify under permitted development, it must adhere to the following limits:
- Extend no more than 4 metres from the original rear wall if a detached home. 3 metres for any other type of house.
- Remain single storey with a maximum height of 4 metres.
- Not exceed half the width of the original house.
- Use matching materials and style to the existing house.
- Not cover more than 50% of the land around the original house.
Neighbour Consultation Scheme
For larger extensions between 3-4 metres, you must advise any adjoining neighbours with the proposed plans. They then have 21 days to raise any objections before you can proceed.
When Planning Permission is Still Needed
If your extension exceeds the size limits or does not meet the criteria, full planning permission will be required. Planning permission may also be required if your home is listed or in a designated conservation area. Always check with your local authority to discuss whether permitted development rules apply before starting work.
Summary
Permitted development rights make modest single storey extensions a more straightforward and affordable option for many homeowners. Providing you stick within the rules and boundaries, you can avoid the time and costs associated with a full planning permission application in many cases.
