St. William's was designed by prominent New York architect J. Cleaveland Cady's firm at the height of Shingle Style architecture fashion.

The main facade features a two-story cylindrical tower capped by a conical roof and flanked by a pair of open porches.

[2] The building and its property is maintained by Saint William’s on Long Point Inc. a non-profit, non-denominational organization, dedicated to preserving the historic church.

The group has created a quiet retreat through the rental of housekeeping facilities and providing community events for the surrounding area during the summer months.

Throughout the past 26 years, they have accomplished a significant amount of restoration and renovations to the historic church, including, but not limited to, stabilizing the foundation and floor in the church, replacing and staining the exterior cedars, replacing and painting the interior plaster, new lighting, and refinished wood floors.