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Conservatory Planning Permissions

Planning Permission


Conservatories are an increasingly popular and cost effective way of adding extra space to your property, but it is essential that you are fully aware of how current planning legislation could affect your plans.

It is always prudent to check with your Local Authority planning office to confirm exact rules and regulations before commencing any building work. Additionally, always check specific clauses in your property deeds - listed properties will have additional restrictions and properties on newer developments may have a requirement for approval from the original developer to any extension to the property. Often this extends to paying the developer a nominal fee for approval.

Do I need planning permission?

To help you understand these issues we detail below some of the "conditions" attached to planning permission and building regulations. (These apply to England/Wales only) Scottish, Northern Ireland, Eire and North American regulations are quite different - You should in all instances take local advice

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PLANNING PERMISSION

In England and Wales you will not usually require planning permission, provided you do not exceed the permitted development limit for your property (which is 50-70 cubic metres, depending on where you live). Notable exceptions to the above are listed buildings and conservation areas. Please note that if your property has been extended in the past - you will have used up some or perhaps all of your "permitted development" area and may need permission. It's also worth noting that occasionally "permitted development" rights may be withdrawn from a property and any extension however small needs planning. If in doubt check.

As a general guide, if your conservatory falls within the following conditions you may not require Local Authority planning permission:

Detached Properties
You are allowed to develop up to 70 cubic metres or 115% of the total volume of the dwelling whichever is greater. However, this is a combination of the total amount of extensions, i.e. is you have had a kitchen extension of 40 cubic metres and require a conservatory of 41 cubic metres this would total 81 cubic metres and planning permission would be required. Should the total be less than 70 cubic metres or 115% of the volume of the dwelling, planning permission may not be required.

Semi-Detached Properties
The same as detached properties, you are allowed to develop up to 70 cubic metres.

Terraced or End of Terrace Properties
Same as detached and semi-detached, but only 50m cubic metres is allowed to be developed.

Flats or Maisonettes
This type of property has no permitted development rights and in all cases planning permission will apply, there are no exceptions.

The above mentioned only applies to extensions after the 1 July 1948.

We have listed some additional information and conditions which attract planning permission:

 1. If you build within 2m of the boundary line and the highest point at that junction is 4m or more high.
 2. If your conservatory covers more than 50% of the original garden.
 3. If planning development rights have been removed.
 4. Grade II listed buildings. These may require hardwood conservatories with glass roofs.
 5. Where a conservatory is 20m or less from a road or public footpath. (see sketch below)

Building and Construction - Planning Permission

Irrespective of the size of the conservatory, should the distance between points A and B be less than 20m planning permission may be required.

Shaded Area may be any of the following:

 1. Road
 2. Highway
 3. Motorway
 4. Public Foot Path
 5. Bridal Way
 6. Access to another property
 7. Access to other garage

Impact onto the Boundary
Normally the local planning officer will be looking at the projection of the conservatory i.e. how far it will protrude into the garden, normally they are happy at about 3m projection from the original house. However, should the proposed conservatory extend more than 3m, he may not look at it so favourably and ask for it to be reduced in size. The reason for this is so your neighbour does not have to look at a large brick wall more than 3m long. Hence the term impact onto the boundary.

To overcome this you may wish to include a facet to your conservatory which may help in some situations. (See sketch below) This should be done by your supplier as a matter of course.

Building and Construction - Planning Permission

You can see from this sketch that the total impact onto the boundary is 6m and you could expect the planning office to reject your application.

If planning permission is not required a letter of lawful development from the council is always a good item to obtain. So should you wish to sell your property in the future, you have proof that you have complied.

However, we strongly recommend, if in doubt always ask your local planning officer. You will find they are always very helpful and they will give you the correct advice so no mistakes are made.

Other points to note:

When Local Authorities are looking at planning applications they will consider how your proposed development impacts on your neighbours and seek to ensure that their environment is not negatively affected by your conservatory. Try to keep your planned conservatory to a reasonable size - in particular try to keep your projection to less than 3m.

If you are fortunate enough not to require planning permission, consider getting written confirmation of this anyway from the Local Authority planning office. Should you wish to sell your property in the future, having this will ensure a smoother transaction.

Remember that just because you don't need official planning permission, you may still need to apply to the developer or builder of your property for permission and again you should retain written records of all communications and transactions in case you wish to sell the property in the future.

Thus in summary with regards to Planning Permission:

Planning Permission

Most conservatories installed in England and Wales generally do not require planning permission unless:

 - Your property is a listed building
 - Your property has had significant additions to living space added in the past
 - You are building the conservatory on the front of your house
 - You are intending to use the conservatory for non-domestic purposes

However, we strongly recommend that in all cases, you contact your local planning office and discuss your project with them prior to ordering to ensure that any obligations are met with regard to planning permission. As the house owner, it is ultimately your responsibility to make enquiries with regard to any local authority requirements affecting alterations to your property.

This information is based on legislation in effect as of January 2005 and is subject to change. Legislation may differ by region and country so please always check with your local planning officer before committing to any project.

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