Bates sold the house in 1825 to Daniel & Mary Cowgill. Cowgill, devoted abolitionist and a Quaker, freed his family's slaves and allowed them to meet in the great hall at Woodburn. The house remained in the family for years until it was sold in 1912 to Daniel O. Hastings. In his ownership the brick front porch, pillars on the south facade, a reflecting pool and numerous interior modifications were completed. He sold the house in 1918 to retired Philadelphia dentist Frank Hall, who also completed more renovations of the interior. In Hall's residency, a young guest named Jessica Irby visited the house; she would later live in the house as the wife of a governor of Delaware.