From Capital and Ideology:
To sum up, nearly all property was concentrated in the top decile and most of it in the top centile, while the vast majority of the population owned nothing.
For a more concrete sense of inequality in Paris at the time, note that, according to the cadastre, almost no one in Paris owned an individual apartment before World War I. In other words, one normally owned an entire building (or sev-
eral buildings), or else one owned nothing and paid rent to a landlord.
I’d actually like to know what that ratio is in various cities right now.