This house does appear in the 1940 census. At that time it was owned and occupied by a husband and wife about 50 years old, plus the wife's 80-year-old mother. The husband is listed as "interior decorator", which seems to have meant "painter" in Census coding. Presumably the phrase hadn't yet acquired its fairy connotation.
Even if the back kitchen was already added then, I can't imagine three people in such a small space! But living alone was EXTREMELY rare in 1940. After skimming lots of pages, I'd estimate that only 5% of dwelling units had a single occupant. Most of those seem to be single-room apts, i.e. hotel rooms labeled as apts. Nearly absolute rule: A residence with more than one room housed more than one person.
The current icon shows Polistra using a Personal Equation Machine.