Harry F. Sinclair House is an Eclectic French Renaissance house in New York City, New York, and a filming location for Cruel Intentions (1999). Built in 1899, it was designed by C. P. H. Gilbert, and is a National Historic Landmark. It is owned by Ukrainian Institute of America.
Location: Upper East Side, New York City, New York, United States
Verified facts
- Located in Upper East Side, New York City
confidence 90/100 · 4 independent sources · SRC-2486, SRC-2487, SRC-7650, SRC-7651 - Designed by C. P. H. Gilbert
confidence 80/100 · 4 independent sources · SRC-2486, SRC-2488, SRC-7650, SRC-7652 - Built in 1899
confidence 75/100 · 3 independent sources · SRC-2486, SRC-2487, SRC-7650 - Architectural style: Eclectic French Renaissance
confidence 80/100 · 5 independent sources · SRC-2488, SRC-2489, SRC-7650, SRC-2486, SRC-9751 - Historic designation: National Historic Landmark
confidence 75/100 · 3 independent sources · SRC-2486, SRC-2487, SRC-7651 - Owned by Ukrainian Institute of America
confidence 90/100 · 4 independent sources · SRC-2486, SRC-2487, SRC-7651, SRC-7650 - Appeared in Cruel Intentions (movie, 1999)
confidence 80/100 · 5 independent sources · SRC-2490, SRC-2491, SRC-7653, SRC-4213, SRC-9633
Evidence & sources
- SRC-2486 — Wikipedia — Harry F. Sinclair House (Tier 3, encyclopedia; retrieved June 2026)
- SRC-2487 — New York Landmarks Conservancy — Ukrainian Institute of America (Tier 2, institutional_page; retrieved June 2026)
- SRC-2488 — Daytonian in Manhattan — The Isaac D. Fletcher Mansion (Tier 3, established_blog; retrieved June 2026)
- SRC-2489 — 6sqft — How the Fletcher-Sinclair Mansion Went from Private Home to the Ukrainian Institute of America (Tier 3, established_blog; retrieved June 2026)
- SRC-2490 — Movie-Locations.com — Cruel Intentions (1999) film locations (Tier 3, film_location_database; retrieved June 2026)
- SRC-2491 — IAMNOTASTALKER — The Valmont Mansion from Cruel Intentions (Tier 3, established_blog; retrieved June 2026)
- SRC-4213 — brickunderground.com (Tier 2, journalism; retrieved June 2026)
- SRC-7650 — National Park Service – NHL/NRHP Nomination Form, Harry F. Sinclair House (NRHP #78001882) (Tier 1, official; retrieved June 2026)
- SRC-7651 — Ukrainian Institute of America – About Us (official site) (Tier 1, official; retrieved June 2026)
- SRC-7652 — NYC-ARTS – Ukrainian Institute of America / Fletcher-Sinclair Mansion (Tier 2, reference; retrieved June 2026)
- SRC-7653 — On the Set of New York – Cruel Intentions (1999) Film Locations (Tier 2, reference; retrieved June 2026)
- SRC-9633 — Scouting NY — Inside the Fletcher Mansion on Fifth Avenue (Tier 2, location_journalism; retrieved June 2026)
- SRC-9751 — Ephemeral New York: This 1899 Gilded Age fairy-tale mansion on Fifth Avenue has had only 4 owners (Tier 2, journalism; retrieved June 2026)
How we verify
Every fact above is independently corroborated by at least two reputable sources and
confidence-scored before publication. Claims that cannot clear that bar are withheld. We show the
street address only for non-residential public landmarks (museums, commercial and civic buildings,
publicly documented filming-location sites); the exact addresses of private residences and any
personal information are structurally barred from publication. Last reviewed June 2026.
Frequently asked questions
Where was Cruel Intentions filmed?
Harry F. Sinclair House, in New York City, New York, is a real-world filming location used for Cruel Intentions.
Who designed Harry F. Sinclair House?
Harry F. Sinclair House was designed by C. P. H. Gilbert.
Where is Harry F. Sinclair House located?
Harry F. Sinclair House is located in New York City, New York.