In 1875, the parade ground was cleared and a flagstaff placed in its center. In the process, the adjutant's office was moved to the headquarters building. It was replaced in short order with a stone command structure, the headquarters building, built in 1876. Another officers' residence was built in 1877, as were the foundations for another that went unfinished for lack of funding. This building was completed in February 1879 as the schoolhouse and chapel. It was the final permanent structure completed at Fort Concho. By 1879, the fort was an eight-company installation of entirely limestone-built structures. Their onstruction had, by 1877, cost the US Army $1 million () on land it had leased. 39 buildings stood on the fort's grounds by April 1889.