Moving in with SO

I am in need of a new living situation, my boyfriend owns a decent sized house he shares with his brother and sister in law. It has enough rooms for all of us and they aren't even home alot of the time. I am thinking about just moving in with him but I am wondering if its too soon. We have been friends for years and dating since last September. We fight sometimes but always get past it. We already spend most of our days together but I know living together wed be around each other even more with no real escape. What do you all think? How long did you date before living with your SO?