

Unless you live in a Listed Building, Conservation Area, Green belt, or Area of Outstanding Natural Beauty, you will not usually need to apply for planning permission if you do not exceed the permitted development rights for your property. You will usually be able to extend a detached property by four metres and an attached property by three metres.
However, if your property has been extended in the past you will have used some of your permitted development rights, or perhaps all of them, and may need planning permission to extend further.
New rules on Permitted Development Rights only came into force in October 2008 and are being interpreted in different ways by local authorities, so it is sensible to check that your planned conservatory meets local requirements.
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