Windows and doors

Do I need planning permission?

Flats

You will need apply for full planning permission for changes to a window or door if:

  • it will be installed where there was not one before;
  • it will be made of a different material to the existing (for instance replacing a timber window with a uPVC window);
  • it will be of a different size to the existing; or
  • it will differ in appearance to the existing (for instance replacing a sash window with a casement window or altering the glazing bar pattern).

If your flat is a listed building (or part of a listed building) you will also need to apply for listed building consent to alter, install or replace any windows or doors.

Houses

You will need to apply for householder planning permission for changes to a window or door if:

  • it will be made of a different material to the existing (for instance replacing a timber window with a uPVC window);
  • your house is covered by an Article 4 Direction and you want to install or replace windows/doors on the front of your house or side if visible from the street; or 
  • a new window will be located on the upper floor of the side of your house (including the roof slope) and would be clear-glazed and openable (unless the opening part of the window is more than 1.7m above the floor of the room in which it is installed).

If your house is a listed building you will also need to apply for listed building consent to alter, install or replace any windows or doors.

Can I replace my timber windows with uPVC windows?

You will need to apply for planning permission and, if your property is in a conservation area, replacing timber windows with uPVC windows would not be  acceptable. Find more information in Chapter 4 of Camden Planning Guidance 1 - Design (pdf)

Can I replace my single glazing with double glazing?

Flats

If there is no change in material, colour, size and design and your flat is not a listed building or covered by an Article 4 Direction then planning permission would not be required to replace single glazed windows with double glazing.

Houses

If there is no change in material and your property is not a listed building or covered by an Article 4 Direction then planning permission would not be required to replace single glazed windows with double glazing.

Can I get confirmation that I do not require planning permission?

In situations where you may need to prove, or obtain peace of mind that an existing or proposed window or door is lawful, you can apply for a Lawful Development Certificate (LDC)

Am I likely to get planning permission?

If you want to find out whether your proposal is likely to be acceptable, you can apply for  pre-planning application advice

How do I apply?

You can apply via the national planning portal  To find out what information is required with your application, please see making a planning application

Still not sure whether you need planning permission?

If you need further advice about whether you need planning permission you can contact planning advice and information

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