You will not usually require planning permission, provided you do not exceed the permitted development
limit for your property (which is 4 metre projection on a detached house and 3 metres on a terrace or semi property). 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It's also worth noting that occasionally "permitted development" rights may be withdrawn from a property and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, or call us for more advice on conservation