went through this just last year with clare council,so if it hasnt changed since then,,,your extension has to be to the rear of the house..
the original floor area of the house is not increased by more than 40 square metres,this includes any previous extension.
be at least 2met from any boundary
for terraced or semi-detached houses, the floor area of any extension can not exceed 12 square metres, this includes any previous extensions as well.
any extension does not exceed the height of the house;
any extension does not reduce the area of private open space, to less than 25 square metres.
like yourself i havent been able to get through to them either........