Canada Permanent Trust Building, Art Deco skyscraper at Bay Street, Toronto, Canada

The Canada Permanent Trust Building is an 18-story Art Deco skyscraper located at the corner of Bay and Adelaide Streets in Toronto. The structure features Indiana limestone construction and characteristic vertical window alignments typical of the Art Deco style.

The Canada Permanent Trust Building opened on March 1, 1930, the 75th anniversary of the Canada Permanent Mortgage Corporation, as its new headquarters at 320 Bay Street. The official heritage designation credits the design to F. Hilton Wilkes and Mackenzie Waters with Mathers & Haldenby, Associates, and Sproatt & Rolph as consultants. It was designated under Part IV of the Ontario Heritage Act on November 26, 1975, and a heritage plaque was placed in 1978.

The building's name comes from Canada Permanent, the mortgage corporation whose headquarters it was; it opened on that company's 75th anniversary, March 1, 1930. It is now called "The Permanent", and a heritage designation plaque placed in 1978 tells passers-by on Bay Street about the site.

The building stands at 320 Bay Street, at the southwest corner with Adelaide Street West, in Toronto's financial district. It is an office building, so interior access is generally limited to tenants and their guests; the 1929–30 façade and the Bay Street canyon can be seen from the public sidewalk. A heritage designation plaque placed in 1978 informs passers-by.

The building's 1929–30 design is credited to F. Hilton Wilkes and Mackenzie Waters, with Mathers & Haldenby as associates and Sproatt & Rolph as consultants, per the Ontario heritage designation. Henry Sproatt is often named as architect. A 1978 plaque at 320 Bay Street explains the designation to passers-by.