Three-story Single-family Homes and Townhomes
Excerpt: Of the 729,000 single-family detached homes started in 2017, a little over 18,000 (2.5 percent) had three or more stories, according to National Association of Home Builder tabulation of recently released Census data.
In contrast, the 23,000 3-plus story townhomes represent 22.0 percent of single-family townhome starts.
More info here:
My comment: 3 story detached homes are not popular in very many areas. It is a long walk up to the 3rd floor. I have appraised them (attic conversions of a classic older home to a master bedroom, for example). I always look to see if an elevator can be added – usually has to be on the exterior of the home. Definitely a functional problem. I rarely see them on existing homes, except for attic conversions. Some newer detached homes have a small room on the 3rd story – family room, extra bedroom, etc.
For townhomes, I have seen a significant increase in 3 story new construction townhomes in my city (within the past few years) and other Bay Area cities. The first floor is a garage plus entry, second floor living room and kitchen, bedrooms on 3rd floor. Very profitable for home builders, especially in areas with high land prices and infill tracts. I have appraised them and the owners did not object to the 3 floors. There are sometimes a few townhomes that are 2 story.
My first apartment when I moved to San Francisco in my 20s was a third floor walkup. I vowed Never Again ;>