CENTURY 21 Post Realty is a full-service real estate company, serving the buyers and sellers in Central New York. The office is located at 68 Lake Avenue, Auburn NY, 13021. CENTURY 21 Post Realty is an independently owned and operated franchise affiliate of Century 21 Real Estate, franchisor of the iconic CENTURY 21 brand, comprised of approximately 9,400 independently owned and operated franchised broker offices in 80 countries and territories worldwide with more than 127,000 independent sales professionals. in 1999 Post Realty is one of the leading independent Real Estate companies in the Auburn, NY area. Founded by real estate veteran Todd Post, his company has grown to be one of the most successful brokerage firms in the Central New York Area.