Riceburner
Well-known member
Lots more to consider besides permits, etc. But if it is allowed...is there plumbing drainage on the side opposite the stairs? Where are you going to put a kitchen? Like I said you could do a shared laundry at the foot of the stair area and have their entrance next to it. A locked door at the top is yours, entrance at the midway landing (if it's close to grade). To do it right...permits and a contractor.