Planning & Permissions
Do I need planning permission?
A plain-English starting point before you speak to anyone.
Many home improvement projects, including some extensions, loft conversions and garden rooms, can be built under Permitted Development rights without a full planning application. Whether this applies depends on your property, its planning history, and local restrictions, so always confirm your specific situation before design work begins.
Last updated 11 June 2026
·By Richard Anslow
Key points
- Many extensions, loft conversions and garden rooms can be built under Permitted Development, without a full planning application - but this depends on your specific property.
- Conservation areas, listed buildings and properties where rights have already been removed by a planning condition are common exceptions.
- Planning and Building Regulations are separate processes: planning is about whether you can build something, Building Regulations are about whether it's built safely and to standard.
- A design that's permitted on one house on a street isn't automatically permitted on the house next door - always confirm your specific situation before committing to a design.
Permitted Development, in plain terms
Permitted Development rights allow certain types of home improvement work without needing to submit a full planning application, provided the project stays within defined limits on size, height and position.
These rights don't apply everywhere. Conservation areas, listed buildings, and properties where rights have previously been removed by a planning condition are common exceptions.
What tends to trigger a planning application
Projects that exceed Permitted Development size limits, sit close to a boundary in a restricted way, or significantly alter the appearance of the property from the street will usually need a full application.
Some projects also require Building Regulations approval even when planning permission isn't needed. These are separate processes that cover different things: planning is about whether you can build something; Building Regulations are about whether it's built safely and to standard.
The sensible first step
Before committing to a design, it's worth establishing what applies to your specific property. Planning history, local authority policy and site-specific factors all play a part, and a design that works for one house on a street may not be permitted on the house next door.
FAQs
How do I find out if my specific property has Permitted Development rights?
Check your property's planning history and any conditions on its original planning decision via your local council's planning portal, or use our permitted development checker as a starting point - we'll confirm what applies before design work begins either way.
Take this further
Have a question about your own project?
Related guides
More on planning & permissions
Permitted development explained
What it actually allows, and where it stops applying.
Party wall agreements: the homeowner's guide
When the Party Wall etc. Act 1996 applies, and what the process actually involves.
Do you need planning permission for a conservatory?
The general position, and why an extension is worth considering too.