M.C. O’Brien is the oldest commercial real estate firm located in Brooklyn, New York. Founded in 1909 by Michael C. O’Brien, Sr., M.C. O’Brien continues to be a family-run business by second and third generation family members. Our extraordinary history in the outer boroughs has brought us a wealth of experience in all property types – office, industrial, retail, investment.

At M.C O’Brien, our specialty is our clients. We believe in building long-term relationships with our clients by providing a high level of personal service and commitment to achieve their real estate goals. Because we are relationship-oriented and not transaction-oriented, our clients really benefit from our knowledge of the market, our involvement in our community, and our professional education in all aspects of our business.

M.C. O’Brien provides a full range of services for both real estate and business owners through our innovative operating platform and entrepreneurial culture.