Conservatories and Rear Extensions

Conservatories and Rear Extensions


  • Increased living space
  • A predominantly glazed structure brings the garden into your home particularly if you have a complimentary patio area
  • A predominantly glazed structure offers an ambient light

N.B. Planning Permission for Extensions is not always required

Conservatories and Rear ExtensionsDo I Need Planning Permission?

Planning Permission may not be required subject to the following limits and 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 metres for an attached house and 4 metres for a detached house.
  • Maximum height of a single storey rear extension of 4 metres.
  • Maximum depth of a rear extension of more than 1 storey of 3 metres including ground floor.
  • Maximum eaves height of an extension within 2 metres of a boundary of 3 metres.
  • Maximum eaves and ridge height of extension no higher than existing house.
  • Side extensions to be single storey with maximum height of 4 metres and width no more than half that of the original house.
  • Roof pitch of extensions higher than 1 storey to match existing house.
  • No verandas, balconies or raised platforms.
  • On designated land* no permitted development for rear extensions of more than 1 storey; no cladding of the exterior; no side extensions.

* The term "original house" means the house as it was first built or as it stood on 1 July 1948 (if it was built before that date). Although you may not have built an extension to the house, a previous owner may have done so.

* Designated land includes national parks and the Broads, Areas of Outstanding Natural Beauty, conservation areas and World Heritage Sites

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