Ground leases/build-to-suit retail parcels available at Willow Grove Mill, an outstanding high-traffic location retail and office center at the intersection of Route 299 and Route 1 in Middletown, Delaware. Willow Grove Mill will consist of 50 acres of commercial development, along with 339 single-family homes, 248 townhomes, and 276 apartments. Join the fastest growing region in New Castle County.