Mount Street is an east–west, quite narrow, archetypal street in the Mayfair district of the City of Westminster, London fronted by many mid-rise buildings, mostly of a narrow frontage. The sides of two very grand hotels flank part of either end of the street. Small, high-end property businesses, investment funds and accountancy businesses punctuate the buildings as well as a row of traditional businesses and conversion-style mansion block apartments or, more generally, authentic such homes.

Mayfair is an area in London, England and is located in the City of Westminster. It is in Central London and part of the West End. It is between Oxford Street, Regent Street, Piccadilly and Park Lane and one of the most expensive districts in the world.