Dundurn Castle is a historic neoclassical mansion on York Boulevard in Hamilton, Ontario, Canada. The 1,700-square-metre house took three years and $175,000 to build and was completed in 1835. The forty-room castle featured the latest conveniences of the day, including gas lighting and running water. It is currently owned by the City of Hamilton, which purchased it in 1899 or 1900 for $50,000. The city has spent nearly $3 million renovating the site to make it open to the public.