Built by nearby residents between 1812 and 1813,[1] it was one of three blockhouses built by locals to protect the area from American raids.

Standing by the St. Andrews waterfront, the St. Andrews Blockhouse is Canada's last surviving blockhouse from the war, and is a registered National Historic Site of Canada.

Sitting along the town's waterfront, it is the last War of 1812-dated blockhouse in Canada.

[3] During the war, a total of three blockhouses were built by locals.

[4] The blockhouse was further used as defense in the 1860s when tensions temporarily rose between Canada and the United States.