If you want to make changes to your home, you might not have to ask your local government for permission. But that’s only true if your project fits what are called “permitted development rights.”

With permitted development rights, you can make changes to your home or add to it without getting permission. Which home addition projects can you undertake without requiring approval? Here they are as given by home addition companies:

Loft conversion

Most loft conversions don’t need planning permission, but you must follow building regulations.

Most of the time, you don’t need the approval to convert, but depending on your loft conversion, you might be required to get approval.  

To meet the approval exemption requirements, the extra space’s total area can be at most 40 cubic meters for terraced houses and 50 cubic meters for detached or semi-detached houses.

This allowance includes not only the extra space you add with this loft but also any additions, like an extension, that were made in the past.

But you don’t have to do this if you live in a flat, a maisonette, a listed building, or a conservation area.


Most of the time, you don’t need planning permission or to follow building regulations to build a conservatory.

But you probably won’t be able to build without permission if:

  • Your house is in a conservation area, national park, or Area of Outstanding Natural Beauty (AONB).
  • The conservatory doesn’t sit on the ground.
  • Your house is a row house or has been added to it.
  • More than 15%, or 70 cubic meters, will be added to the size of your home (whichever is greater).

Garden room

In the past few years, garden rooms have become more popular. This is often because they have been proven excellent places to relax, host guests, or do hobbies.

Most garden rooms don’t require planning permission. Since they are considered outbuildings, you can build one if you follow some rules.

Like loft conversions, if your home is a “listed building,” you won’t have the right to change it. If your home is in a National Park, an Area of Outstanding Natural Beauty, a conservation area, or a World Heritage Site, or if it’s a flat or a maisonette.


A porch adds space to your home but can do much more.

When done properly, it makes your home more secure by putting a barrier between your front door and the outside world. It can also be an excellent way to keep the cold out of your home.

Most porches are built with “permitted development rights” as long as:

  • From the outside, the ground floor doesn’t have more than three square meters of space.
  • Nothing would be higher than three meters from the ground (you should measure the height the same way you do for a house extension).
  • No part of the porch would be closer than two meters to the house or the road.

Doors and windows replacement

If your new windows and doors look the same as the ones you already have, you won’t need to get permission from the city to replace them.

But if it’s more complicated, you won’t be able to do it without permission. Even more so if the new opening lets your neighbors look in.

You will also need planning permission if you live in a conservation area or a building on a list. To avoid being on the wrong side of the law, you should work with your home addition contractors DC and determine whether you need the permissions.