Federal building

A federal building is a building housing local offices of various government departments and agencies in countries with a federal system, especially when the central government is referred to as the "federal government".
Federal buildings in [the United States] often include passport offices, immigration services and FBI field offices.

Canada

Notable Federal buildings in Canada include:

Complexe Guy-Favreau, Montréal
Dominion [Public Building (Halifax)|Dominion Public Building, Halifax]
Federal Building, Edmonton
Government of [Canada Building, Moncton]
Government of Canada Building, [North York]