Extensions: Planning Permission & Permitted Development

A great way to add value and squeeze out as much room from your property as possible - extending is one of the nations go-to projects when it comes to giving you more room.


Do I need Planning Permission for my Extension?

Well not necessarily. You can do A LOT more than you probably would have thought under Permitted Development Rights. Luckily for us, increased size limits for single-storey extensions (that were due to expire in May 2019) have now been made permanent! Get in!

The basic rules of Permitted Development are:

  • A single-storey extension can be built up to 8m (6m if your house isn’t detached) from the rear of the property, and 2-storey extensions can be 3m.

  • No part of the extension can be higher than the highest part of the house.

  • 2-storey extensions can’t be closer than 7m to the boundary of the garden.

  • Side extensions can only be single story and no bigger than half the size of the house.

  • No more than half the land of the original building can be covered by the new extension and other buildings (even if they are already there).

As with any other extension or refurbishment you may wish to carry out on your property - permitted development rights may not be applicable if your property is listed or is situated on Designated Land.

If you are planning an extension that does not fall within these parameters then head over to planning portal to submit your application, and be sure to make sure you check out your local authorities planning policies.

Knowledge is power here and knowing how to get your ideas over the finish line is important to saving time and money.

John Jeavons-Fellows