25 S Duncan Drive, Montauk, NY 11954

$5,250,000 · 6 bed · 6 bath · 5,206 sq ft · built 2026 · MLS# 1037158 · Active

This custom-built 5000+sf waterview residence offers a rare combination of scale, thoughtful design, and modern coastal living in Montauk. The home features 6 bedrooms and 5.5 bathrooms, including four ensuite bedrooms, delivering flexibility for full-time living or a high-end retreat. Interior living space spans three levels with a finished lower level (1482sf) ideal for additional recreation and gym use, a 1509sf main level, and a 1770sf second floor. A cathedral-ceiling great room anchors the main level, with oversized sliding doors that open directly to the lush yard, custom mahogany deck,…

Single-family homes in the Montauk Union Free School District sold for a median of $1,868,000 (typically $1,550,000–$3,000,000) across 9 recorded sales between Oct 10, 2025 and Aug 14, 2026, up 6.7% on the 12 months before. Too small a sample to be statistically stable — that median rests on 9 recorded sales, so a single sale moves it substantially. Treat it as a starting point rather than a market reading.

At about $9,000 a year, this home's property tax runs roughly 29% above the $7,000 typical for Montauk 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