Justice Building, Federal heritage building on Wellington Street, Ottawa, Canada

The Justice Building is a Château-style government office building on Parliament Hill in Ottawa, designed by Thomas W. Fuller and built 1935–1938 as Block D for the Royal Canadian Mounted Police. It closely resembles the Confederation Building just to its east, also by Fuller, and has housed Department of Justice offices, which gave it its name.

Built from 1935 to 1938 as Block D for the Royal Canadian Mounted Police, the building was designed by Thomas W. Fuller and named the Justice Building after it later housed the Department of Justice. It was recognized as a federal heritage building in 1988 and renovated between 1998 and 2001.

The ornate stonework and carved details reflect the craftsmanship valued during its construction period. These visible elements give the building a distinct character that stands apart from typical functional structures.

The Justice Building stands at 294 Wellington Street, just west of the Parliament Buildings and immediately beside the Confederation Building, which shares its architect and style. The main entrance faces Wellington Street, so the Châteauesque roofline and dormers are best seen from the opposite sidewalk. The building is an active parliamentary office and is not open to the public.

Ian Fleming's short story "For Your Eyes Only" places James Bond at the RCMP headquarters while it occupied this building, and the story describes its structure. The building was designated a recognized federal heritage building in 1988.