Getting planning permission for that dream extension can be a nightmare if you’re not aware of planning regulations, so we would like to clarify some key facts about what building projects do and don’t need planning permission … 

A home extension or addition to your home could be considered permitted development and not requiring an application for planning but would be subject to the following conditions:

  • 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.
  • Single-storey rear extension must not extend beyond the rear wall of the original house* by more than three metres if an attached house or by four metres if a detached house.

In addition, outside Article 1(5) designated land* and Sites of Special Scientific Interest the limit is increased to 6m if an attached house and 8m if a detached house until 30 May 2016. These increased limits (between 3m and 6m and between 4m and 8m respectively) are subject to the neighbour consultation scheme.

  • Maximum height of a single-storey rear extension of four metres.
  • Extensions of more than one storey must not extend beyond the rear wall of the original house* by more than three metres.
  • Maximum eaves height of an extension within two metres of the boundary of three metres.
  • Maximum eaves and ridge height of extension no higher than 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.
  • Two-storey extensions no closer than seven metres to rear boundary.
  • Roof pitch of extensions higher than one storey to match existing house.
  • Materials to be similar in appearance to the existing house.
  • No verandas, balconies or raised platforms.
  • Upper-floor, side-facing windows to be obscure-glazed; any opening to be 1.7m above the floor.
  • On designated land* no permitted development for rear extensions of more than one storey.
  • On designated land no cladding of the exterior.
  • On designated land no side extensions.

To arrange a free consultation please contact us to book an appointment at a time that is suitable for you, we are happy to visit clients outside of office hours. For advice call us on 01277 363332 or 07977 571664

Important:

Permitted development allowances described above apply to only houses, not flats, maisonettes or other buildings. Be sure to check with your Local Planning Authority whether permitted development rights apply as they may have been removed. Additional consents may be required if your property is listed or in a designated area.