Willistown Township is located between the mainline and Route 3 in eastern Chester County, Pennsylvania, with an approximate population of 11,000 people. Willistown became a township in 1704 and has a history predating the Revolutionary War.

As Willistown’s Zoning Officer, ARRO is responsible for permits, inspections, orders, and citations issued by the township. ARRO completes commercial and residential building code inspections as needed, along with plan reviews.