Conservatory Buyers Guide - Planning Permission

Conservatory Planning Permission

Do you need planning permission?

About two years ago the government changed the rules for the construction of a conservatory extension. The very basic rules are, if you live in a terraced or semi-detached property, you may build conservatories up to three metres in projection, any width and up to four metres high, as long as the floor area, internally, does not exceed thirty metres squared and the volume of the structure does not exceed seventy cubic metres. These same rules apply to a detached property other than the projection may be four metres.

Conservatory Planning Permission - Do You Need It?Having stated that, there are a number of other factors that come into play when determining if planning permission is required. If you have an existing extension (any building work done after the original dwelling was built), you need to calculate the volume of the extension and add the figure to the volume of the proposed conservatory and if that exceeds the permitted seventy cubic metres, then planning permission will be required. If the conservatory is within twenty metres of 'public space' (a road or a foot path ) then planning permission will be required. If you want to build the conservatory on the side of front of your property (altering the view of your home from the public's perspective) planning permission must be sought.

In conservation areas and with listed buildings, planning permission is always a necessity. One needs to check the deeds of the property to ensure that ' permissible development rights' have not been withdrawn. It is common practice in new developments for this to be the case.

Should you wish the conservatory to be open plan to the house, you would incur the need of building regulation approval. This is rarely approved as the conservatory structure will not comply with the U-value (the ability to retain heat) the building regulations require. The only way to overcome this is to have a specialist calculate the U-value of the existing building and prove that if you upgrade the existing insulation, you will not make the U-value of the home and the new conservatory any worse than it is at present.

Related Conservatory Guides

For further reading, you may wish to consider reading the following guides from the same category in this section:

Buyer's Guide

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