Sorry about the title, thought was the best summary. Have recieved planning but have not commenced work on site yet, and i want to add a sun room on to the side of the house would i be as well off submit it now and if i do would it effect the main planning already granted or should i wait until i have started the build and then submit? Or will i build it now and go for retention whats the best way around it bearing in mind i was a year and a half trying to recieve planning.