Confederation Building, Government office building at Wellington Street, Ottawa, Canada

The Confederation Building is a civil gothic office building at Bank Street and Wellington Street, just west of the Parliament Buildings. Its rough grey stone walls carry rows of narrow windows, and the steep roof is clad in green copper, with a tall central tower topped by a pointed copper spire and smaller towers and dormers along the roofline. An arched entrance with glass doors sits at street level.

Work on the Confederation Building began when Governor General Lord Willingdon laid the cornerstone during Canada's Diamond Jubilee celebrations in 1927. The civil gothic structure was designed by Richard Cotsman Wright and Thomas W. Fuller. In 1988 the federal government designated it a Classified Federal Heritage Building.

The building's name refers to Confederation, and it sits just west of the Parliament Buildings at Bank and Wellington, generally treated as part of Parliament Hill. Its offices are used by civil servants and by MPs and ministers from the Conservative, Liberal and NDP parties, including some junior cabinet members.

The building stands on Wellington Street in central Ottawa and is easily visible from various angles along the street and surrounding areas. Visitors should expect that certain interior areas may have restricted access, as it remains an active workplace for government staff and elected officials.

The cornerstone was laid by Governor General Lord Willingdon during Canada's Diamond Jubilee celebrations, marking the start of construction. The building was designed by Richard Cotsman Wright and Thomas W. Fuller, and in 1988 it was designated a Classified Federal Heritage Building.