under the same roof

under the same roof

Within the same house. It's pretty rare to have all my brothers and sisters under the same roof, so it really does feel like a special occasion. At our new office, we will have dental, dermatological, and primary health care all under the same roof!
See also: roof, same

under one/the same ˈroof

(informal) in the same house, etc: There were three generations of the family living under one roof.
See also: one, roof, same
References in classic literature ?
She was to be their chosen visitor, she was to be for weeks under the same roof with the person whose society she mostly prized -- and, in addition to all the rest, this roof was to be the roof of an abbey