
Acquired 364 acres and built the core estate, including a stone mansion, barn, and springhouse. Jacobs, a prominent colonial figure, served 15 terms in the Colonial Assembly, contributed to the American Revolution, and was the first Speaker of the independent Pennsylvania Assembly in 1776. The barn burned in 1820 and was rebuilt in 1822. The property passed to heirs until sold in 1851.
Colonel Hewson Cox, a War of 1812 veteran and Mexican-American War interpreter, purchased the estate. In 1852, he built a country villa inspired by Andrew Jackson Downing's designs. The family, including sons Walter and Richard, maintained the property as a prominent rural retreat. Listed on the National Historic Register in 1984 as the "Hewson Cox House."
Acquired 312 acres and transformed it into "Kates Mansion." Added a library wing (inspired by Haddon Hall, England), chauffeur’s cottage, steam-driven dairy barn, heated pool, cistern system, and clay tennis courts. A leader in agricultural steam power research, Kates introduced technological innovations. The estate was vacant from 1924-1938.
Electrified the property and converted the carriage house into a three-bay garage. Donated the estate to Church Farms School in 1953.
Used as dormitory and program space for 15 years, then as a pig barn until the 1980s. Neglect led to deterioration; failed development plans with Rouse Co. Property divided between Chester County and West Whiteland Township in 1995/2010.
Purchased 901 Old Valley Road (5.82 acres house, 1.73 acres barn). Invested in extensive restorations, reviving abandoned structures after 20 years of neglect.
Ongoing barn renovation and proposals for reunification with 925 Old Valley Road to create a cohesive historic site.
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