Washington is 10% more expensive than Vallejo.
When comparing Washington, DC and Vallejo, CA, the overall cost of living indices are 171 and 155 respectively (national median = 100). Rent is $113/month cheaper in Washington, saving renters about $1,356/year.
Median household income is $16,791/year higher in Washington. Home values also differ significantly — the median in Washington is $724,600 compared to $557,500 in Vallejo.
District of Columbia has a lower income tax rate, making Washington slightly more tax-friendly.
Washington vs Vallejo — common questions
Other cost of living comparisons for Washington and Vallejo