19 Cobblestone Court, Centerport, NY 11721

$3,999,999 · 5 bed · 7 bath · 6,900 sq ft · built 1998 · MLS# 1052877 · Active

Commanding water views, exceptional privacy, and more than three acres define this Centerport estate overlooking the harbor and Long Island Sound. Designed in an English Country style, the nearly 8,000 square feet of usable living space unfolds with a sense of scale, from the double-height foyer and 12-foot tray ceilings to multiple fireplaces and expansive rooms oriented toward the water. A richly detailed library creates a more intimate retreat, while the kitchen, generous bedroom suites, and private guest or in-law accommodations support both everyday living and extended stays. Outdoors, the…

Single-family homes in the Harborfields Central School District sold for a median of $950,000 (typically $800,000–$1,210,000) across 155 recorded sales between Oct 7, 2025 and Oct 2, 2026, up 5% on the 12 months before. This home's $3,999,999 list price sits in the luxury single-family tier for the Harborfields Central School District.

ZIP 11721 has about 2.2 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 $48,949 a year, this home's property tax runs roughly 226% above the $15,000 typical for Harborfields 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