Castaic, CA vs Diamond Bar, CA

There is a significant gap in the cost of living between these two cities. Castaic is 18% cheaper than Diamond Bar. With a cost index of 152 vs 185, the difference would have a meaningful impact on a household's monthly budget. Someone relocating from Castaic to Diamond Bar should plan for substantially higher expenses across most categories.

On the housing front, median rent in Castaic is $1,751/month compared to $2,422/month in Diamond Bar — a 28% difference. Home values follow the same pattern: Castaic is more affordable at $710,400 median vs $867,000.

Median household income in Castaic is $132,153 compared to $106,602 in Diamond Bar (+24%). Castaic offers a double advantage: higher earnings combined with a lower cost of living, giving residents significantly more purchasing power. Looking at affordability, residents of Castaic spend roughly 15.9% of their income on rent, less than the 27.3% in Diamond Bar.