Classification of student rental by-the-room

[Byron Law]

How would a house that is rented out by the room be classified? Would it be a single family structure or a multi-family structure?
Scenario: I wish to procure a lot near a university and build a house that would be rented out to students by the room.  The floor plan would entail 4 rooms and a shared living space (per floor) for the basement and the main floor and possibly two larger higher rent rooms on the third floor (w/ their own living space as well).
Also, would each bedroom I rent out be considered a dwelling unit or would that be dictated by shared living spaces (one per floor)? Zoning requires 2 parking spaces for each "dwelling unit" (not tenant). Since each room would have a max of 1 tenant, 2 parking spaces for each tenant seems excessive. Two per shared living space would be more reasonable, although I would ensure a minimum of one per tenant if the 2 per living space standard came in lower.