Do we need planning permission?

Conservatories & Extensions

Conservatories and extensions are considered a permitted development meaning you do NOT need an application for planning permission. However, this is subject to a number of conditions of which some are mentioned below. These differ slightly depending on whether it’s a conservatory or extension so check the Planning Portal website before going ahead.

  • No more than half the area of land around the original house would be covered by additions or other buildings.

  • No extension forward of the principal elevation or side elevation fronting a highway.

  • No extension to be higher than the highest part of the roof.

  • Maximum height of a single-storey rear extension of four metres.

  • Maximum eaves height of an extension within two metres of the boundary of three metres.

  • Roof pitch of extensions higher than one storey to match existing house.

  • Side extensions to be single storey with maximum height of four metres and width no more than half that of the original house.

  • No verandas, balconies or raised platforms.


Windows & Doors

You do not usually need to apply for planning permission for:

  • Repairs, maintenance, and minor improvements such as repainting window and door frames.

  • Insertion of new windows and doors that are of a similar appearance to those used in the construction of the house.

The permitted development rules allows for alterations subject to the following conditions:

  • Any alternation to project no more than 150mm from the existing roof plane.

  • No alteration to be higher than the highest part of the roof.

  • Side facing window to be obscure-glazed; any opening to be 1.7m above the floor.


If you’re considering making a change to your property find out more by speaking to a member of our team on 01794 511180.