1040 Washington Avenue, Plainview, NY 11803
$1,999,999 · 4 bed · 4 bath · 5,075 sq ft · built 1998 · MLS# 1040523 · Active
Welcome to one of Plainview's most distinctive properties, a substantial 5,000+ sqft colonial tucked away on a private road in the desirable Washington Avenue/College Section. Set on over half an acre, this expansive residence offers an exceptional combination of space, privacy, classic architectural details, and extraordinary possibilities. From the moment you arrive, the impressive wraparound porch sets the tone for a home designed around gathering, entertaining, and enjoying everyday life. Inside, a dramatic two-story entry foyer opens to generously scaled living spaces, hardwood floors, high ceilings, and an abundance of…
Single-family homes in the Syosset Central School District sold for a median of $1,315,000 (typically $1,050,000–$1,760,000) across 259 recorded sales between Oct 6, 2025 and Oct 2, 2026, up 7.7% on the 12 months before. This home's $1,999,999 list price sits in the upper single-family tier for the Syosset Central School District.
ZIP 11803 has about 1.3 months of single family inventory — hot seller's market. Severe inventory shortage — homes sell fast and often draw multiple offers over asking, giving sellers maximum leverage.
At about $33,534 a year, this home's property tax runs roughly 52% above the $22,000 typical for Syosset 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

Listings courtesy of OneKey® MLS as distributed by MLS GRID.
Based on information submitted to the MLS GRID as of October 11, 2026 2:30 am. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
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Plainview Market Trend
Over the past 2 years, Plainview has strengthened — the median sale price has risen roughly 11% year over year to around $1.02M, and homes have generally been selling faster. Sellers currently hold the stronger hand, and if the pattern persists, prices could continue to firm.
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Looking for off-market opportunities or a property attorney's read on this listing? Contact Joseph DeVito — Lic. R.E. Associate Broker + NY-licensed real estate attorney.
