821 Prospect Avenue, Westbury, NY 11590

$825,000 · 5 bed · 3 bath · 2,138 sq ft · built 2012 · MLS# 1036844 · Active

Rare opportunity in Westbury! Two separate condominium units being offered together, creating exceptional flexibility for both owner-occupants and investors. Featuring a combined 5 bedrooms and 3 full bathrooms, this unique setup offers the opportunity to enjoy the benefits of living in one unit while generating income from the other, or to utilize both units as part of an investment strategy. The property also offers an established rental-income history, adding to its appeal for buyers seeking income-producing potential. Enjoy the advantages of two distinct residences within one offering—an uncommon opportunity that…

Condos in the Westbury Union Free School District sold for a median of $420,000 (typically $365,000–$470,000) across 24 recorded sales between Nov 25, 2025 and Sep 3, 2026, up 5% on the 12 months before.

ZIP 11590 has about 1.8 months of condo inventory — hot seller's market. Severe inventory shortage — homes sell fast and often draw multiple offers over asking, giving sellers maximum leverage.

At about $12,220 a year, this home's property tax runs roughly 144% above the $5,000 typical for Westbury Union Free 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