Explanation: I have a site beside my parents , I currently live on it in a mobile, useing my parents entrance as I didn't want to put a road way in as I thought it would go against me in time for planning permission . My question is if I was to build something like "a granny flat " rather than a full blowin house would my planning permission be cheaper when granted ? Does it go on the size of the house or is it just a fixed price once your granted? My area seems to be €15000-20000!!!