I’ve moved into the granny annexe of my DD and SIL large old country house. I have enough space, my own lounge, bedroom, bathroom and kitchen. It works exceptionally well for us, all very respectful of each other’s space and privacy. We work as a team with DGS and pup and house duties, I do all the laundry and cook when required to etc and DD insists that we eat together every night. I do think I’m very lucky and my other 4GC all come over to stay regularly. If I have friends to stay, they sleep in my annexe and I go next door in a guest room. I think you need to sit down and chat with your family beforehand you decide, to work out exactly what everyone wants from the situation. One of my sons has joked that if DD kicks me out for “unruly behaviour” ? then he’ll have an annexe built and I can go to him !