This is the 11665th most frequent Russian word.
жилым
"Жилым" means "residential" or "inhabitable."
Here, 'жилым' is used as an adjective describing the area as residential.
Этот район считается жилым.
This area is considered residential.
In this context, 'жилым' modifies 'домом' to denote the building is used for living purposes.
Он никогда не жилым домом пользовался для работы.
He never used a residential building for work.
'Жилым' is used with 'кварталам' to describe city districts intended for living.