Cost of living in West Islip, NY — Housing, Rent & Index

The median home value in West Islip, NY is $721,025 as of 2026-04. That places West Islip above the US average for housing cost, with a cost index of approximately 203 versus a national baseline of 100.

Over the past 12 months, the median home value in West Islip has moved sideways, and over the past five years it has averaged +3.9% annual growth. The current price sits -0.2% from its 5-year peak in 2026-03.

Renters pay a median of $2,458 per month in West Islip. Rents have changed — over the last year and averaged — per year over five years.

Beyond housing, day-to-day costs in West Islip are shaped by state and local taxes, utility rates, transportation, and groceries. This page focuses on the housing component, which is the largest single line in most household budgets and the easiest to compare across cities using consistent national data.