How do I Search for Duplex, Triplex, 4-Plex units Only?

[Jesse Glatz]

When using the property search tool and other criteria for property type, how is it possible to search for 2,3 or 4 unit homes only and not include all single family homes? Choices are only Homes, Condo, Townhome, Co-Op. Surely there is a way to search for multi-unit properties only? I do not want to look at any SFR or single door homes but can't seem to find a way to search by that criteria using any of the BP search functions.