63 Washington Avenue, Mastic Beach, NY 11951

$682,000 · 4 bed · 4 bath · 2,970 sq ft · built 1975 · MLS# 894817 · Active

Charming Cape with Endless Potential in Mastic Beach! Welcome to 63 Washington Avenue, a spacious 4-bedroom, 4-bathroom single-family home nestled on a generous 0.38-acre lot in the heart of Mastic Beach. Key features are a Den/family room and formal living areas, Full basement for storage or future finishing, attached 1-car garage with private driveway, Eat-in kitchen and a Master suite on the main level. Built in 1970, this residence offers nearly 3,000 square feet of living space and a layout perfect for multi-generational living or entertaining.

Single-family homes in the William Floyd Union Free School District sold for a median of $510,000 (typically $430,000–$580,000) across 494 recorded sales between Oct 6, 2025 and Oct 2, 2026, up 5.2% on the 12 months before. This home's $682,000 list price sits in the luxury single-family tier for the William Floyd Union Free School District.

ZIP 11951 has about 5.3 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 $10,646 a year, this home's property tax runs roughly 33% above the $8,000 typical for William Floyd Union Free 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