The Colonial Building is a historic government building located in St. John's, Newfoundland and Labrador, Canada. The building was the home of the colonial and later provincial Newfoundland government and the House of Assembly from January 28, 1850 to July 28, 1959. In 1974, it was declared a Provincial Historic Site.

The Newfoundland and Labrador House of Assembly is the unicameral deliberative assembly of the General Assembly of Newfoundland and Labrador of the province of Newfoundland and Labrador, Canada. It meets in the Confederation Building in St. John's. Bills passed by the assembly are given royal assent by the lieutenant governor of Newfoundland and Labrador, in the name of the King of Canada.