The story of Chalmette continues beyond the Battle of New Orleans, and the historic resources of the park represent a continuous layering of history.

The Malus-Beauregard House is a beautiful example of French-Louisiana architecture and built some 18 years after the Battle of New Orleans. It is named for its first and last owners. Never associated with a plantation, the house served as a country residence for a succession of wealthy people in the 19th century.

The property on which the house was built was subdivided form the original Chalmete Plantation by the St. Amond brothers in 1832 and sold to Alexandrew Baron. The property was one arpent (196 feet) wide on the river and 17 arpents deep, or 15 acres. Baron was acting on behalf of his mother-in-law, the Widow Malus, nee Madeleline Panneteir. The sixty-by-twenty-foot house with twelve-foot-deep galleries on the north and west elevations was constructed for the Widow Malus, in 1833 or 1834.

In 1880, Judge Rene' Beauregard bought the property. It remained in his family until 1904 when it was sold to the New Orleans terminal Company. The National Park Service acquired it in 1949.