These are multifamily properties with multiple kitchen and laundries.   

Plan is to wall it off and convert to a 4br/2ba,  update existing bath and kitchen, new floors,  interior and exterior  paint.

*Note that we interchangeably use the labels: Lodging House = Rooming House = Single-Room Occupancy (SRO) = Co-Housing PropertyThe building has 3 kitchens and 4 full bathrooms, on 4 floors:3rd floor: The 3rdfloor is ‘off-limits’ to the 1st and 2nd floor tenants, so the two 3rd floor tenants enjoy the exclusivity of their own entrance, and a kitchen and bath shared only with one other unit, plus some distant ocean and Boston skyline views.2nd & 1st floors: Eleven units share 1 kitchen and 2 full bathrooms, one on each floor.

@Ariel HernandezSo many chefs in the kitchen.

I would not add much, a simple bedroom, bathroom, kitchen, and hvac.Another aspect of this deal is that the building is listed as a historic building and thus could qualify for some grants. 

We completely remodeled the kitchen and bathrooms.

Upstairs (separate space with kitchen would rent for $500- as I already have someone lined up for it.Purchase price about 230k.

Put locks on each bedroom door so individual tenants have security of their personal belongings.You need a really good set of rules regarding shared common space, cleaning, kitchen use, bathroom use, etc.Be very clear about the rules up front, and selective about who you put in there.

I've been slowly updating -- new kitchen and bath in one unit, Fresh paint throughout, etc

No damage except for 1 spot on the kitchen counter.