Situated within a historic, former military installation that dates back to 1776, the Presidio Office of Pacific Union International serves much more than adjacent Marina, Presidio Heights and Pacific Heights neighborhoods.  Its exceptionally experienced real estate agents are active in all areas of San Francisco and adjacent counties, assisting buyers and sellers in all price ranges, with particular emphasis on luxury properties and estates. While many real estate firms call themselves "luxury brokers," Pacific Union International, with its affiliation with Christie's Great Estates and its global reach, defines luxury in terms of its agents and the level and quality of its service.