Wetherill, Kate Annette, Estate

Why it's listed
Overlooking the southern end of Stony Brook Harbor in Head of the Harbor, this 26.75-acre estate was built in 1895 for Kate Annette Wetherill. Stanford White, her brother-in-law, designed the shingled octagonal house, with gabled faces, a one-story porch on fluted Ionic columns, and an octagonal central hall lit by a skylight. A service wing extends east and was later raised in height. The grounds retain a sloping lawn, an octagonal pump house of glacial stone, stone gate piers with iron gates, remnants of an octagonal rose garden, and a stone arch bridge. A polygonal carriage house, also by White, and a superintendent's residence across the road are included. The estate is recognized for its architecture, as an unusual work within White's country house designs, and for its link to the Smith family circle that shaped the harbor's estate era. Wetherill descended from Richard Smith, founder of Smithtown.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · catalog entry. Generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29).
| Period of significance | 1895 |
|---|---|
| Styles | Colonial Revival |
| Areas of significance | Entertainment/Recreation, Architecture, Social History |
| Acreage | 26.8 |
| Boundary source | NPS cultural-resource GIS polygon |
| Full listing page | Wetherill, Kate Annette, Estate (property record) |
What listing means for this property
This is a historic district. Buildings within its boundary are either contributing (they add to the district's significance) or non-contributing. Owners of contributing income-producing buildings can claim the 20% federal rehabilitation tax credit; homeowners should look at state credits. National Register districts impose no design review by themselves; a local historic district ordinance, if one exists, does (the difference explained).
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.