A form of vertical stratification did take place in the Paris population due to Haussmann's renovations. Prior to Haussmann, Paris buildings usually had wealthier people on the second floor (the "etage noble"), while middle class and lower-income tenants occupied the top floors. Under Haussmann, with the increase in rents and greater demand for housing, low-income people were unable to afford the rents for the upper floors; the top floors were increasingly occupied by concierges and the servants of those in the floors below. Lower-income tenants were forced to the outer neighborhoods, where rents were lower.