An establishment or office in which, or a firm by whom, banking is done.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "banking house" in a sentence
"Leonard C. Howell, after leaving Charleston and making a brief stay in the North, left again for the South, and when Mr. Gordon and his bride were fairly settled in their work in Brooklyn, he was preparing to enter into business in middle Georgia, as the representative of an extensive banking house in New York."
"He assembled his small change in neat piles and dialled the London number of the ancient banking house of Fattorini."