It’s hard for some to fathom the appeal of these triangle-shaped houses: There are no basements, and the steeply pitched second floors almost beg for dormers. But this style became popular after World War II; they’re particularly associated with the 1950s–1960s design aesthetic. Architect Andrew Geller’s version was featured in The New York Times in 1957, setting off a building frenzy.
Characteristics: Ground-level gutters
Common Updates: Solar energy panels