Arbor Hill Historic District–Ten Broeck Triangle
In 1975 several residents of the Ten Broeck Triangle formed the Arbor Hill Concerned Citizens Association (AHCCA) to lobby the city for improvements in neighborhood services. Many of them lived in the surviving townhouses, which they had often restored themselves. They saw gentrification as the key to revitalizing the neighborhood, due to its proximity to downtown Albany and the growing service-sector jobs there. To further this goal, they worked with preservationists to have the triangle recognized as a historic district. That area was duly listed on the Register in 1978 under that name.
Arbor Hill Historic District–Ten Broeck Triangle
While the former burying ground site was made into a park instead of being built on, construction on other parcels increased. The year the burying ground was moved, 41 Ten Broeck Street, the earliest dated house on that street after the mansion, was erected. The brick rowhouses at 15–23 and 35–39 Ten Broeck followed as well. In 1848, the neighborhood regained some of its original prestige when Thomas Worth Olcott, a prominent banker, bought the Ten Broeck Mansion and formally renamed it Arbor Hill. He and his family expanded it over the next several years. The King Building, an elaborate Greek Revival duplex, was built over four years in the 1850s at 27–29 North Swan in front of the archway that provided access to the mansion's grounds on the rear.