Side & rear extensions

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side and rear extensions

If you live in a single family house (not a purpose built or converted flat or a shop or a commercial property) you may be able to build an side extension or rear extension without the need to make a planning application.

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.
  • Maximum depth of a single-storey rear extension of 3.0m for an attached house and 4.0m for a detached house.
  • Maximum height of a single-storey rear extension of 4.0m.
  • Maximum depth of a rear extension of more than one storey of 3.0m including ground floor.
  • Side extensions to be single storey with maximum height of 4.0m 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.
  • 3.0m maximum eaves height of an extension within 2.0m of the boundary.
  • Maximum eaves and ridge height of extension no higher than 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 permitted development for rear extensions of more than one storey.
  • On designated* land no cladding of the exterior.
  • On designated* land no side extensions.