301 Old Mill Road, Saint James, NY 11780

$2,499,000 · 6 bed · 4 bath · 6,050 sq ft · built 2026 · MLS# 1019623 · Active

Welcome to 301 Old Mill Road, a masterfully crafted custom-built new construction nestled on a private lot backing directly to protected preserve land, offering exceptional privacy in the heart of Saint James. Designed with extraordinary attention to detail, this exceptional 6-bedroom, 4-bath residence blends timeless architecture with refined modern luxury, showcasing soaring ceilings, elegant living spaces, thoughtfully curated finishes, distinctive copper roof accents, and impeccable craftsmanship throughout. Additional highlights include a gourmet chef’s kitchen and an expansive lower level with 9-foot ceilings and egress, offering endless possibilities. Every detail reflects…

Single-family homes in the Smithtown Central School District sold for a median of $845,000 (typically $735,000–$995,000) across 440 recorded sales between Oct 6, 2025 and Oct 2, 2026, up 5% on the 12 months before. This home's $2,499,000 list price sits in the luxury single-family tier for the Smithtown Central School District.

ZIP 11780 has about 3.6 months of single family inventory — seller's market. Demand is outpacing supply, so homes sell quickly with firm pricing and limited room to negotiate.

At about $33,000 a year, this home's property tax runs roughly 120% above the $15,000 typical for Smithtown Central 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