The Haas Candy Factory, located behind the Old Mint at Fifth and Mission Streets, is a five-story, brick-clad, reinforced concrete building originally used by George Haas & Sons for manufacturing and packaging candy, chocolates and ice cream.

The Haas Candy Factory is the better known of only two surviving industrial buildings designed by San Francisco architect, William Curlett, who specialized in office buildings and large residences.

Today the building contains a restaurant and offices. Although the brick façade has been painted, the use changed, and the entrances fitted with glass and aluminum doors, the building retains integrity of location, design, setting, materials, workmanship, feeling, and association.