關鍵是要找到出處，然後以理服人。
https://www.movoto.com/blog/single-family-residence-what-is-it-and-what-does-it-mean-for-zoning/
SFR, or Single Family Residential, means that a single family will be expected to live in the home, and it’s not zoned as a duplex, triplex, or other multi-family option where there will be more than one unit. While people who are unrelated can certainly live in an SFR together, and it doesn’t have to technically be for a family, the zoning stops people from dividing a house into a number of apartments, for example, and then letting a number of different families live in those apartments.
