Extensively remodeled and expanded in 1933-1934, the front wings of the Presidio Officers' Club incorporate portions of the Spanish presidio's adobe walls that may date as far back as 1791. When U.S. troops occupied the post in 1847, they rebuilt the roof of the Spanish-Mexican-era adobe (the popular belief that this adobe was the "Comandancia" or headquarters of the Spanish-Mexican Post has not been substantiated). In 1884-1885 a projecting central pavilion-like "assembly room" of wood construction was added to the structure. The next proposals to "restore" the building appear to have been formulated in the early 1930s, when a prototypical work relief-type project was instigated under the planning and supervision of Quartermaster Capt. Barney L. Meeden. The form and significance of the existing Officers Club pertains most directly to this remodeling and to the 1930s-era development of the Main Post. The 1933-1934 remodel removed some additions and transformed the building into a "Spanish Colonial Revival" edifice. Works Progress Administration (WPA) funds became available for additional improvements in 1936 and 1939, though none of these improvements seems to have directly involved the old adobe walls fronting the structure. The building stands today as a complex series of interconnected adobe, concrete, wood-frame, and steel frame partitions measuring 188' x 119' in plan. The appearance of the existing building, with its rustic Spanish-tile gable roofs, heavy rough timber lintels and beams, and decorative iron work, was determined in the remodel by Captain Meeden's perceptions of the possible appearance of the Spanish-era adobe building; In the course of the 1930s construction, substantial remnants of early adobe walls were enclosed in metal lath and plaster and still form much of the front portion of the building. The integrity of the whole has been compromised considerably by a massive 1970s rear addition that towers over the historic building.