2439 Union Boulevard #3A, Islip, NY 11751

2439 Union Boulevard #3A, Islip, NY 11751

$235,000 · 1 bed · 1 bath · 791 sq ft · built 1970 · MLS# 1054259 · Active

Why Rent When You Can Own? This First Floor Co-op Located in the Forest Green Community Has Been Impeccably Maintained! Step Inside to a Spacious Entrance Foyer Featuring Two Generously Sized Closets, Opening to the Open Concept Dining Area and Living Room with Gleaming Hardwood Floors. The Kitchen Features Wood Cabinetry and Opens to the Main Living Space, Perfect for Everyday Living and Entertaining. A Well-Sized Bedroom with updated Flooring and Full Bathroom Complete the Unit. For Added Convenience, the Unit is Equipped with a Washer/Dryer Combo! Enjoy a Pet-Friendly…

Co-ops in the Islip Union Free School District sold for a median of $275,000 (typically $230,000–$300,000) across 36 recorded sales between Oct 9, 2025 and Oct 1, 2026, up 3.8% on the 12 months before.

ZIP 11751 has about 3.7 months of co-op inventory — seller's market. Demand is outpacing supply, so homes sell quickly with firm pricing and limited room to negotiate.

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 10, 2026 9:45 pm. 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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Islip Market Trend

Islip's monthly median has swung between $370K and $800K over the past 2 years — volatility that usually reflects a thin or mixed market rather than one steady trend. Recently, homes have been selling in about 33 days.

More homes nearby

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.