Santa Rosa is 2% more expensive than Downey.
When comparing Santa Rosa, CA and Downey, CA, the overall cost of living indices are 172 and 169 respectively (national median = 100). Rent is $192/month cheaper in Downey, saving renters about $2,304/year.
Median household income is $10,010/year higher in Santa Rosa. Home values also differ significantly — the median in Santa Rosa is $685,000 compared to $728,500 in Downey.
Both cities share the same state tax structure since they are in California.
Santa Rosa vs Downey — common questions
Other cost of living comparisons for Santa Rosa and Downey