a building, when you are thinking of it in connection with how much it cost to build or how much it is worth :
They put their money into bricks and mortar.
a building, when you are thinking of it in connection with how much it cost to build or how much it is worth :
They put their money into bricks and mortar.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005