Between the rebellions taking place in 1837-8 until 1843, the hall was used as troop barracks. When the Law Society regained possession in 1844, an expansion was designed by Henry Bowyer Lane; the West Wing and Library were built, with two domes (later removed) over the library to connect the two wings. In 1846 the Law Society entered into an agreement with the government to house the province's Superior Court at the hall. Today, the building is jointly owned by the Law Society and the Government of Ontario.