Laurier House is a National Historic Site in Ottawa, Ontario, Canada. It was formerly the residence of two Canadian prime ministers: Sir Wilfrid Laurier and William Lyon Mackenzie King. The home is now a historic house museum that is open to the public for guided tours from Victoria Day in May until Thanksgiving in October. Its address is 335 Laurier Aven…Laurier House is a National Historic Site in Ottawa, Ontario, Canada. It was formerly the residence of two Canadian prime ministers: Sir Wilfrid Laurier and William Lyon Mackenzie King. The home is now a historic house museum that is open to the public for guided tours from Victoria Day in May until Thanksgiving in October. Its address is 335 Laurier Avenue East.