The article doesn't make this clear... is sharing a house illegal, or is it only illegal to separate leases for each room? Immediately post-college, I shared houses with other 20-somethings. It was always a single lease - 4 roommates listed, 4 beds, all of us responsible for the full amount of the rent. But, we were absolutely allowed to reside in the same home. Same thing in college - single lease for four people in…
I was the one that actually 'owned' the house. No one paid rent to me, but I was reimbursed for all utilities, food, etc. My only expense was the mortgage.
Since no one paid rent, it wasn't a 'boarding house.'