Insurance providers will count a bedroom as any room used as, or originally built to be, a bedroom – even if it’s used for other purposes. So, say you had three bedrooms and turned one into a study or dressing room, it would still count as a three-bedroom home, not a two-bedroom home.  Generally a good indication that a room can be identified and used as a bedroom is if it can fit at least a small single bed into it and it has a window, but there’s no legal requirement for this. It’s down to the individual insurance provider to say what they consider a bedroom to be. You’ll need to check exactly what your insurance provider defines as a bedroom in your policy. Make sure you give the right information, otherwise your policy might not pay out if you need to make a claim.