Cost of living in Westmont, CA — Housing, Rent & Index

The median home value in Westmont, CA is $702,395 as of 2026-04. That places Westmont above the US average for housing cost, with a cost index of approximately 198 versus a national baseline of 100.

Over the past 12 months, the median home value in Westmont has moved sideways, and over the past five years it has averaged +4.0% annual growth. The current price sits -2.5% from its 5-year peak in 2024-12.

Renters pay a median of $2,255 per month in Westmont. Rents have changed -3.5% over the last year and averaged — per year over five years.

Beyond housing, day-to-day costs in Westmont 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.