Attach something to or alter the outside of your flat

Last updated: 12 June 2018

If you own a flat, you may want to add or change something on its external surface (its outside wall).

If you want to do this, you should first check to see if you need to apply for planning permission.

Permitted development

Many additions or improvements you want to make to the outside of your flat can be done without requesting planning permission.

If they meet a set of rules, you can add them without having to apply for it. This is called 'permitted development'.

Permitted development in this case only applies to additions or alterations that do not reach out more than a metre from your flat.

These include:

  • replacement or new windows and doors (as long as you are not altering the dimensions of the existing window or door)
  • solar panels
  • satellite dishes
  • flues (exhaust pipes)

You can add something to the outside of your flat through permitted development as long as it does not make the flat larger, and is not:

  • a balcony, roof terrace or raised platform
  • a wind turbine
  • a flue forming part of a biomass heating system
  • a flue forming part of a combined heat and power system
  • an air source heat pump
  • in a conservation area or within the curtilage of a listed building

You should always check with your council's planning department to see whether you need to apply for planning permission. Even if you meet the permitted development rules, there may be other approvals you'll need to get.

Planning permission

If the addition or improvement you want to add does not meet the conditions for permitted development, you have to apply for planning permission.

Find out how to apply for planning permission, or contact your local authority for further information.

Other approvals

You might need other approvals before you can carry out work. For example, you might need approval under the building regulations from the local council.

If you do not own the land on which the development is being carried out (for example, if you're a tenant or the land's in joint ownership), you need to get the landowner's permission.

If you live in a listed building you'll also need to obtain listed building consent.

It's your responsibility to make sure you get any necessary approval.