Fairfield and Downey have a similar cost of living.
When comparing Fairfield, CA and Downey, CA, the overall cost of living indices are 167 and 169 respectively (national median = 100). Rent is $299/month cheaper in Downey, saving renters about $3,588/year.
Median household income is $14,921/year higher in Fairfield. Home values also differ significantly — the median in Fairfield is $592,500 compared to $728,500 in Downey.
Both cities share the same state tax structure since they are in California.
Fairfield vs Downey — common questions
Other cost of living comparisons for Fairfield and Downey