i live with a roommate and they are unhappy with my 3 cats. i have 3 boys a rescue persian, a disabled ragdoll persian cross and a little ragdoll baby. she is really unhappy having litter trays in the house but we live in the uk on a main road where it is not safe to let them be outdoor cats. im very meticulous about windows and doors to keep my boys safe. they do go out in the garden on harness' though (except my disabled baby). she wants some kind of shed built in our car park but it is on the main road and very noisey and it will get really loud in there i imagine if it rains. does anyone have any type of safe cat friendly conversions they could share. it either this or i move else where and im considering it just to keep my boys away from all the noise happy. i know its only their trays going outside with a catflap coming back into the house but its made me feel really cornered and i feel i am running out of options. i see why shes unhappy, i have a disease so i can be a little delayed picking up their poos if i am having a bad health day but the tray are ALWAYS clean so its really not a drama. please any suggestions would be amazing