322 Rose Hill Road, Water Mill, NY 11976

$10,250,000 · 5 bed · 5 bath · 4,110 sq ft · built 2000 · MLS# 847331 · Active

Nestled in the heart of Water Mill South, this historic luxury estate is a rare opportunity to own a masterpiece of Shingle Style architecture. Renovated in 2007 and conceived and built in 1884 by Henry Turbell Rose, Rosemary Lodge stands as a testament to exceptional craftsmanship and enduring elegance. Just minutes from the ocean, 0.93-acre grounds featuring a 4,110-square-foot residence, pool house, and a pool. This beautifully designed home boasts 5 bedrooms, 4 bathrooms, and 1 half bathroom. Impeccably preserved, the home retains its museum-quality original paneling, hand-carved woodwork, stained…

Single-family homes in the Southampton Union Free School District sold for a median of $3,150,000 (typically $1,695,000–$5,140,000) across 95 recorded sales between Oct 9, 2025 and Sep 29, 2026, up 27.4% on the 12 months before. This home's $10,250,000 list price sits in the luxury single-family tier for the Southampton Union Free School District.

ZIP 11976 has about 20.7 months of inventory — strong buyer's market. A heavily oversupplied market — buyers hold the upper hand, and sellers often offer price cuts or concessions to compete.

At about $15,288 a year, this home's property tax runs roughly 155% above the $6,000 typical for Southampton Union Free School District. Suffolk bills combine town, school and special-district levies, so two homes at the same price in neighboring districts can carry materially different taxes. Exemptions such as STAR, Senior or Veteran move the number as well — a new owner's bill is often not the same as the seller's.

OneKey MLS (recorded LI sales, trailing 12mo) + actual tax