We can advise you on what you need to know, and direct you to the right sources to get additional, technical guidance. We have put together a general guide to local authority conservatory planning requirements, as our team has captured the main elements you should consider. There are also links to useful sites. Click the Directgov logo or planning portal logo for more information on the government website.

Conservatories Planning Portal
Conservatories Planning Portal
Planning Permission Guidelines

Did you know that adding a conservatory to your home is considered to be a permitted development? This means you do not need to apply for planning permissions, as long as the following applies…

  • 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 is three metres for an attached house and four metres for a detached house.
  • Maximum height of a single storey rear extension of four metres.
  • Maximum depth of a rear extension of more than one storey of three metres including ground floor.
  • 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.
  • Roof pitch of extensions higher than one storey to match existing house.
  • No verandas, balconies or raised platforms.
  • On designated land no permitted development for rear extensions of more than one storey; no cladding of the exterior; no side extensions.
  • Where work is proposed to a listed building, listed building consent may be required.

In this context, the phrase ‘original house’ means the house as it was first built or as it stood on 1 July 1948 (if built before then).

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

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