Our client installs timber annex buildings that comply with the definition of a caravan and as such they are not treated as a building that required planning permission.  The only consideration therefore is whether the use of the structure as an annex results in a material change of use, if it doesn't then no planning permission is required and the structure is lawful.

RCC have dealt with a many such application and it is always important to get a certificate of lawfulness from the council before their customer invests significant sums of money on the annex structure.

There is lengthy case law on such proposals which we set out very clearly in our planning submission but all to often the council planners do not understand the issues involved and this was the case in this instance.  We therefore had to keep explaining the matter to the council and pushing them to determine the submission in a positive way, finally we got there and the certificate was issued.