9934 Old Mill Rd, Ellicott City, MD 21042-1602 is currently not for sale. The 2,453 sq. ft. single-family home is a 3 bed, 3.0 bath property. This home was built in 1972 and last sold on 9/21/2012 for $390,000. View more property details, sales history and Zestimate data on Zillow.