$710,000
4 bd3 ba1,770 sqft
21 Francisco Ave

The average Central Islip, NY home value is $562,572, up 4.5% over the past year.
Zillow Home Value Index (ZHVI), built from the ground up by measuring monthly changes in property level Zestimates, captures both the level and home values across a wide variety of geographies and housing types.
Typical Home Values: $562,572
1-year Value Change: +4.5%
(Data through July 31, 2025)
Zillow is more than a place to browse homes. It’s a place to connect with a local agent, explore financing solutions, schedule home tours, understand your buying and selling power, and more.