Augustine Wehrle purchased the 280 acre Bope farm along the south shore of Buckeye Lake in 1914 and built this Elizabethan Tutor style home with a greenhouse, boathouse, and barns. The 32 room home was constructed of stucco and brick, with a red tile room, wine cellar in the basement, solid cherry doors, teakwood floors, rookwood tiles, stained-glass windows, and six fireplaces. One of the fireplaces is made of flint from Flint Ridge. The home became locally known as the Wehrle Mansion.

Late in the 1900s the estate was sold to Andrew Wolfe, who began the developement of Heron Bay. The Wehrle Mansion was briefly re-named the Grand Harbor Yacht Club and was open to the public for special events. The housing market collapse of 2008 forced the developers out of business. JD Swain purchased the Wehrle Mansion in 2009 with the dream of returning it to a residence for his young family. Today, Swain Manor, a single family home, sits on an expansive 5.25 acre waterfront lot surrounded by the 200 lakeside homes and condominiums that comprise the Heron Bay subdivision. The home is now known as, simply, "The Mansion".