It's about the utility of the land in the defined market. I've always considered condo land use as multi-family. I think Henry Harrison agrees in one of his books and so did the instructor in a Fannie Mae course when the new forms came out. The block is asking about land use, and a condo is considered multiple dwellings on the same plot of land.
The ones I like are the reports where the land use is 100% single family and yet the narrative comments indicate schools, shopping and other support services are within the defined market area. Don't know about where anyone else comes from but around here, schools, gas stations, convenience stores, grocery stores, medical offices or any other type of office space, golf courses, fire stations and police stations do not have single family use. I don't know any "market" or neighborhood that is 100% single family without some type of additional land use.