not a house owner, but my room (and dorm room last semester) get so messy during depressive episodes. clothes all over the floor, food wrappers all over the bed, possessions strewn about... i'm a clean person, but you wouldn't think i was if you saw my space in such a state.
one thing that concerns me more is that even when my room is at its dirtiest (when my mental health is at its worst), my friend's room is much, much dirtier. she also has severe mental illness but isn't very open nor vocal about it. i dunno, this thread just reminded me of that...