ePrivacy and GPDR Cookie Consent by Cookie Consent Do I need planning permission for my flat or maisonette?

Do I need planning permission for my flat or maisonette?

2 min read
Oct '25 • by Heather

Quick summary

You generally need planning permission for any work on a flat or maisonette, especially for extensions, loft conversions affecting the roof space, or changes like new windows or satellite dishes in conservation areas. The process varies by project, but most modifications require approval before starting, and leaseholders may also need freeholder consent.

Flats and maisonettes do not fall within your permitted development rights, meaning you will have to seek planning permission for changes you want to make to your property.

Not only this, most flats are owned through a leasehold. This means, depending on your project, you may also have to seek the freeholder’s consent.

However, all of this doesn’t mean it’s impossible to carry out work on your flat. Just that you’ll have a few hoops to jump through.

Here’s some changes you might be considering…

Building an extension on a ground-floor flat

When adding an extension onto a ground floor flat, planning permission is a must.

Don’t worry, with the right architect by your side, this doesn’t have to be a stressful process. They’ll research your area so they can work out what design will give you the best chance of approval. At Resi, we’ll even submit the paperwork for you.

If extending a listed building, you’ll need to obtain ‘listed building consent’ from your local planning authority, as well as consulting them beforehand on your plans.

Remember: failure to obtain permission before construction on a listed building is a criminal offence.

How much does an architect charge?