Oulagisket
Also known as: Sloan Estate
Why it's listed
Oulagisket is a large Italianate estate on the east side of Route 9D near Garrison, overlooking the Hudson River. Railroad executive Samuel Sloan built the two and one-half story stuccoed masonry mansion around 1864, with a three-story hipped-roof tower, arched windows with keystones, block brackets and arcaded chimneys. Nearby stand a stuccoed carriage house, a superintendent's cottage from about 1890, a carpenter's shop from about 1900 and a dairy barn and stable complex from 1916. Sloan, born in Northern Ireland in 1817, led the Hudson River Railroad and later the Delaware, Lackawanna and Western. After his death the estate passed to Vassar College, which found it too costly to maintain and arranged to sell the outbuildings in the early 1950s. The estate is recognized for its architectural distinction, its intact wooded setting and its link to a leading local figure. The buildings are now residences.
Significance in brief: The nomination argues the estate is the most significant example of its type, period and method of construction in the Hudson Highlands. It also notes the property's association with Samuel Sloan, a prominent railroad executive and one of the locality's more significant individuals. The estate is said to retain integrity of design, setting, materials, workmanship and location.
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) · National Archives catalog entry. NRHP reference 82001253, listed November 23, 1982. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | NY 9-D, Philipstown |
|---|---|
| County | Putnam County |
| Listed | November 23, 1982 |
| Reference number | 82001253 |
| Resource type | Building |
| Architectural style | Italianate |
| Areas of significance | Architecture, Social History |
| Level of significance | Local |
| Status (as stated in the nomination) | Condition is given as good; the buildings are now used as residences. |
| Acreage | 19 |
| Coordinates | 41.37688, -73.93644 (NPS GIS) |
What listing means for this property
National Register listing is honorary: it recognises significance and does not restrict what a private owner may do without federal money or permits. It unlocks the 20% federal rehabilitation tax credit for income-producing buildings, state credits in many states, and Section 106 review when federal agencies are involved. See what listing means in practice.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 82001253.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7110435
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.