18 20th Avenue, Sea Cliff, NY 11579

$1,650,000 · 4 bed · 3 bath · 2,022 sq ft · built 1898 · MLS# 1062551 · Active

There's something special about a home that welcomes you before you even enter! At 18 20th Avenue, the beautiful mahogany front porch sets the tone for this exceptional Colonial, offering timeless character, modern luxury, and remarkable privacy in the beautiful Village of Sea Cliff. Originally built in 1898 and completely rebuilt in 2017 by a builder for his own residence, this thoughtfully designed home combines classic architecture with modern conveniences and quality craftsmanship. Inside, rich hardwood floors, solid wood doors, and sun-filled living spaces lead to an expansive dining area,…

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. This home's $1,650,000 list price sits in the upper single-family tier for the North Shore Central School District.

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 $17,699 a year, this home's property tax runs roughly 11% 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