Which of the following qualifies as multifamily housing?

Multifamily housing is defined as a residential property that contains more than one housing unit. Therefore, properties that contain five or more units are categorized as multifamily housing. This classification is essential, especially in the context of financing, zoning, and property management.

Options that include two to four units generally fall under the category of smaller residential properties. While these may still be owned as rental units, they do not meet the threshold for multifamily housing as defined by most regulatory standards.

Single family homes that are adapted for multiple families may seem like they could be classified as multifamily housing, but they haven't been officially designated as such by regulatory definitions unless they meet the criteria based on the number of units, hence they don't fall into the multifamily category clearly.

In summary, for a property to qualify as multifamily housing, it must contain five or more units, making that the correct classification in this context.