It is a three-story mansion with an irregular, asymmetrical and sprawling plan which is roughly C-shaped.

It features a conical tower built as part of the original structure, designed by McKim, Mead, and White.

Also on the estate are a formal garden, a water tower, a superintendent's house, two garages, and a cottage.

[1] Media related to Fort Hill Estate (Lloyd Harbor, New York) at Wikimedia Commons

This article about a historic property or district in Suffolk County, New York, that is listed on the National Register of Historic Places, is a stub.