The mansion has housed the offices of the Niagara Parks Commission since 1982, and several historic rooms are still open for public viewing.

[citation needed] In 1924, Harry Oakes and his wife, Eunice, bought the property from the Schoellkopfs.

Marie, Ontario, to design and construct the mansion[4] known as Oak Hall, which was completed by 1928 at a cost of CA$500,000 ($8.63 million in 2023 dollars).

Currently, the commission's chairman and general manager have their offices on the east side of the building, where Sir Harry and Lady Oakes' bedrooms once were.

[8] The chapel, which was built so the family could have private worship services, is now the commission's information technology manager's office.