Holy cow, I wrote a book!
some of the most expensive real estate is in neighborhoods
where relatively few people actually live.
According to one company's estimate,
37% of the the residences have been purchased by people who
merely use them as vacation homes,
visiting only for a week or two per year
and leaving the building empty the remainder of the year.
In other words,
the people who can afford to live there choose not to.
This same phenomenon is reported in other cities.
only 10% of the condos in the Plaza Hotel are occupied full-time.
Another example of a house with nobody living inside is
the case where the house
is a façade for an industrial building,
most commonly an
a subway ventilation shaft.
I find both categories fascinating.