45 Old Sag Harbor Road, Southampton, NY 11968

$3,750,000 · 5 bed · 7 bath · 4,058 sq ft · built 2022 · MLS# 1048987 · Active

Set on over an acre of beautifully landscaped grounds, this 4,500 sq. ft. Southampton residence offers the perfect blend of sophistication and comfort. With five spacious, well-appointed bedrooms and six baths, the home features sun-filled interiors, expansive living and dining spaces and seamless access to outdoor living. A chef’s kitchen and elegant entertaining areas flow effortlessly to porches at both the front and back of the home. Classic custom finishes and attention to detail are noted on both the interior and exterior The private grounds are enhanced by a sparkling…

Single-family homes in the Southampton Union Free School District sold for a median of $3,195,000 (typically $1,775,000–$5,315,000) across 92 recorded sales between Oct 18, 2025 and Sep 29, 2026, up 31.2% on the 12 months before.

At about $9,322 a year, this home's property tax runs roughly 55% 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