In 1804, John Crompton Weems purchased a portion named "La Grange", which he eventually sold to his daughter-in-law, Martha P. Weems. Between 1828 and 1845, Theodorick Bland purchased the farm from the Weems family and under his ownership, the property became known as "Blandair". Sarah Bland Mayo inherited the property upon her father's death and eventually gave the property to her daughter, Sarah Mayo Gaither, as a wedding present in 1857. Bland's descendants owned the property until the Gaithers sold the property in 1867. Another series of owners held the land until it was sold to Baltimore developer Henry E. Smith and his wife, Lillie, in 1937. After Lillie Smith died in 1979, Blandair was inherited by her daughter, Elizabeth, who resided on the property until her death in 1997. In 1997 or August 1998, Blandair was purchased from the Smith family by Howard County, Maryland using State Rural Legacy funds.