i wonder how much of "other" is multigenerational households.
Personally I've come to consider the dominant meta of suburbs full of single (nuclear) family homes has been utter trash and a total disaster for society on the scale of the entire economy. Sending kids off to go into debt for thirty fucking years the moment they turned 18 was a massive mistake and now they can't even get a HOUSE out of it because that debt now represents fucking student loans.
I believe we should return to the strategy where a family holds a piece of property generation to generation, continuously expanding and improving it to accommodate more and more people living cooperatively. Multiple sets of grandparents, aunts and uncles, cousins, all living in the same parcel if not under the same roof - the 'it takes a village' approach. Need more room? Fuckin BUILD some. Need to afford materials and labor? Pool the earning resources of all the working adults... And/Or opt for traditional construction methods that utilize the materials of the land itself, maybe conscript the cousins if necessary. Even if municipal ordinances are opposing the expansion, an extended family working together is stronger in challenging those power structures than any one or two parent(s) would be on their own.
And also we should stop building houses out of fucking paper.