brokerage vs brokerage house

brokerage and brokerage house both are nouns.

Word	Noun	Adjective	Verb	Adverb
brokerage	Yes	No	No	No
brokerage house	Yes	No	No	No

As nouns, brokerage and brokerage house are synonyms defined as:

brokerage and brokerage house: place where a broker conducts his business

brokerage (noun)	brokerage house (noun)
place where a broker conducts his business	place where a broker conducts his business
a stock broker's business; charges a fee to act as intermediary between buyer and seller
the business of a broker; charges a fee to arrange a contract between two parties