3 Seaforth Lane, Lloyd Harbor, NY 11743

$4,290,000 · 5 bed · 5 bath · 5,200 sq ft · built 2026 · MLS# 981869 · Active

BRAND NEW CONSTRUCTION ~ TO BE BUILT. This is an opportunity to customize your exclusive Luxury Residence. This home has an expected completion of early 2027. Local prominent builder, will finish to perfection on this incredible flat 2.67 acre of beautiful property. Thoughtful floorplan incorporated, with proposed residence, offering 5 Bedrooms, Kitchen with high end appliances, quartz countertops, open to Great Room, Office/Bedroom Ensuite on first, Dining Room and Mud Room. Radiant heat in Primary Bath and Mud Room. In addition, this new residence offers; 2 Laundry Rooms one on…

Single-family homes in the Cold Spring Harbor Central School District sold for a median of $2,300,000 (typically $1,825,000–$2,900,000) across 68 recorded sales between Oct 7, 2025 and Sep 18, 2026, up 15% on the 12 months before. This home's $4,290,000 list price sits in the upper single-family tier for the Cold Spring Harbor Central School District.

ZIP 11743 has about 3.2 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 $7,267 a year, this home's property tax runs roughly 75% below the $29,000 typical for Cold Spring Harbor 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