we purchased a house with attached former post office which moved to another part of the village many years before. it left a retail unit that was used as a hardware store but had been closed when we brought the property. the unit is attached to our house by a internal door. it has no facilities, as was a former post masters house. we applied for permitted development to convert to a usable residential room in our home and was turned down as council said it was sui generis. we applied for full planning and was turned down as unit was class E and hadnt been marketed for 12 months.
the council confirmed it was a integral room to our home and took on board it had no facilities but still requested us to market it for 12 months as a commercial rental. would it be worth taking to appeal ?