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Surrey Conservatories Home>Planning regulations
Planning regulations
The good news is that 90% of all conservatories built do not require either Local Authority Planning Consent or Buildings Regulations Approval. We will be happy to run through details for your particular home, and if either Planning Consent or Building Regulations are required, Surrey Conservatories can apply for these on your behalf if you wish.

Planning Permission:
If you live in England or Wales, you do not usually require planning permission for a new conservatory unless you live in a conservation area or a listed property.

Under the new Planning Regulations which came into force in October 2008, semi-detached properties can extend up to 3m, and detached properties can extend up to 4m. However, if the original property has already been extended, then planning permission may be required anyway, please consult your local authority.

It is also worth noting that occasionally 'permitted development' rights may have been withdrawn from a property and any extension no matter how small needs permission. In all cases if you have any doubts at all, check with your local authority.

Here is a summary of the main current regulations regarding permitted development:
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.

Building Regulations:
Again if you live in England and Wales, conservatories are usually exempt from building regulations, To qualify for this exemption, your conservatory should meet the following criteria:
  • The roof comprises at least 75% of translucent material and the new walls comprise at least 50% translucent material
  • The floor area is less then 3O square metres.
  • The conservatory is sited at ground level.
  • The conservatory is attached to and thermally separated from the dwelling, but having a door giving access to it.
Building Regulations in Scotland are different. A Building Warrant is required before you can commence construction of a conservatory over 8 square metres. It is best to check with your local authority.
Selected photos courtesy Wendland Roof Solutions
Copyright Surrey Conservatories, Guildford, Surrey
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