How many water closets are required for an R3 occupancy one and two family dwellings?

For R3 occupancy, which pertains to one and two family dwellings, the plumbing code stipulates that at least one water closet is required. This requirement is primarily based on the notion that a singular water closet is generally adequate to meet the needs of a small household.

In a one or two-family dwelling, it is assumed that one bathroom with a water closet will suffice for the occupants, considering typical usage patterns. However, additional fixtures may be necessary based on the number of bedrooms or specific accommodation needs, but the fundamental requirement remains at one water closet.

Choosing one as the answer reflects an understanding of residential plumbing requirements as they pertain to occupancy classifications within building codes.