Sunnyvale is 102% more expensive than Downey.
When comparing Sunnyvale, CA and Downey, CA, the overall cost of living indices are 341 and 169 respectively (national median = 100). Rent is $1,173/month cheaper in Downey, saving renters about $14,076/year.
Median household income is $94,462/year higher in Sunnyvale. Home values also differ significantly — the median in Sunnyvale is $1,816,600 compared to $728,500 in Downey.
Both cities share the same state tax structure since they are in California.
Sunnyvale vs Downey — common questions
Other cost of living comparisons for Sunnyvale and Downey