In 1850, Louis Anthony Cazenove (1807–1852), a successful Alexandria merchant, bought the Lee family home for his new bride, Harriotte Stuart, daughter of Cornelia Lee Turberville Stuart and great-granddaughter of Richard Henry Lee, signer of the Declaration of Independence. The young couple were joined at the house by Louis' daughters from his first marriage, Frances (1838–1884) and Charlotte Louise (1840–1914), and his father Anthony Charles Cazenove (1775–1852), a French Huguenot immigrant from Geneva. The Cazenoves renovated the home to include the latest styles and technologies. They added Greek Revival and Italianate embellishments to the original 1785 structure as well as the front and back porches, a third floor addition to the main section, and installed the first heating, plumbing, and servant bell systems in the house.