The society bought the Towers Hotel at 79–99 Willow Street in 1974 for accommodation, which is connected to the society's other Columbia Heights properties via tunnels. In 1978, a property at 25 Columbia Heights underwent renovation for use as offices and in the early 1980s properties were bought at 175 Pearl Street and 360 Furman Street for factory and office use. A building at 360 Furman Street was bought in March 1983 and renovated, providing almost 9 hectares of floor space for shipping, carpentry and construction. The Bossert Hotel at 98 Montague Street was also bought in 1983 as a residence building. 97 Columbia Heights, the former site of the Margaret Hotel, was purchased in 1986 as it was ideally located next to WTBTS residences at 107 and 124 Columbia Heights and it could easily tie in with the main complex on the other side of the street by means of an under-street tunnel. An 11-story residential building was erected on the site to house 250 workers. A property at 90 Sands Street was also bought in December 1986 and a 30-story residential building for 1000 workers was completed on the site in 1995. A 1996 publication listed other Watch Tower residential buildings in Brooklyn including the 12-story Bossert Hotel, 34 Orange Street (1945), Standish Arms Hotel at 169 Columbia Heights (1981), 67 Livingston Street (1989), and 108 Joralemon Street (1988).