40 Prospect Avenue, Sea Cliff, NY 11579

$2,649,000 · 4 bed · 3 bath · 2,873 sq ft · built 1910 · MLS# 1049376 · Active

Upon entering through the iron gates into the verdant walled garden of 40 Prospect Avenue, one witnesses a stately colonial sitting atop over 17,000 square feet of property with panoramic views of Hempstead Harbor and incredible sunsets. Once inside, you are drawn to the living room with its built-in bookshelves, wood burning fireplace and picture windows overlooking the water and a large backyard with steps leading down towards the beach. The eat-in kitchen has large windows overlooking the boats bobbing in the harbor. The first floor also features a dining…

Single-family homes in the North Shore Central School District sold for a median of $1,250,000 (typically $875,000–$1,775,000) across 139 recorded sales between Oct 9, 2025 and Sep 29, 2026, down 2% on the 12 months before.

ZIP 11579 has about 4.4 months of single family inventory — balanced market. Supply and demand are roughly even, so buyers and sellers share leverage with fair, predictable pricing.

At about $29,657 a year, this home's property tax runs roughly 85% above the $16,000 typical for North Shore Central School District. Nassau assessments run on a multi-year cycle, so the assessed value behind this bill can lag what the home actually sells for today. A sale does not automatically reset it, and 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