Seattle and Oakland have a similar cost of living.
When comparing Seattle, WA and Oakland, CA, the overall cost of living indices are 196 and 195 respectively (national median = 100). Rent is $81/month cheaper in Oakland, saving renters about $972/year.
Median household income is $24,615/year higher in Seattle. Home values also differ significantly — the median in Seattle is $912,100 compared to $924,700 in Oakland.
Washington has no state income tax, giving Seattle residents a significant tax advantage over California's 13.3% rate.
Seattle vs Oakland — common questions
Other cost of living comparisons for Seattle and Oakland