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Planning Permission

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Planning Permission for Conservatories


Planning Permission Under new regulations that came into effect from 1 October 2008 adding a conservatory to your house is considered to be permitted development, not needing an application for planning permission, subject to the limits and conditions listed below.


• 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 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.


Please note: the permitted development allowances described here apply to houses not flats, maisonettes or other buildings. Where work is proposed to a listed building, listed building consent may be required.


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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