 In December 2012, it was designated as a municipal heritage site by the City of Calgary as part of a development deal which also allowed the owner to build nine houses with secondary suites on the Hart House's undeveloped grounds.After being renovated in 2013 the house was put out for renting, the renovated building includes a modern security system, a gourmet kitchen, a library, a home office, a gym, family rooms and six bedrooms.The Hart Dungeon was the gym and training school used by Stu Hart and some of his sons to train wrestlers and other athletes which was located in the mansions basement.