2
START at the top and work down, both with the house in general and each room in particular.
Ideally, a loft conversion (which can greatly increase your home’s value) should be done before renovating the rooms below, as it’s much less painful to have a leak (from water getting in when the roof’s off) or a hole in a ceiling (from a builder slipping in the loft) in rooms that aren’t finished.
If you’re redecorating a room, start