86 Union Avenue, Islip, NY 11751

$699,990 · 3 bed · 2 bath · 1,236 sq ft · built 1892 · MLS# 1048892 · Active

Bring your vision to 86 Union Ave, a charming Islip property with classic character and an exceptional location! This traditional home features a welcoming covered front porch, distinctive architectural details, and a spacious, level lot with a detached garage/outbuilding. The generous grounds offer plenty of possibilities for outdoor living, gardening, recreation, or future improvements. Ideally situated directly next to the Islip Public Library and close to local shops, restaurants, parks, and village amenities. A unique opportunity to restore, renovate, and make this property your own in a highly desirable Islip…

Single-family homes in the Islip Union Free School District sold for a median of $716,000 (typically $630,000–$820,000) across 117 recorded sales between Oct 9, 2025 and Sep 29, 2026, up 6.1% on the 12 months before. This home's $699,990 list price sits in the mid-market single-family tier for the Islip Union Free School District.

ZIP 11751 has about 2 months of single family inventory — seller's market. Demand is outpacing supply, so homes sell quickly with firm pricing and limited room to negotiate.

At about $10,299 a year, this home's property tax runs roughly 26% below the $14,000 typical for Islip 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