In Petaluma, seniors pay $6,300 per month for assisted living, which exceeds the statewide norm of $5,250 by over $1,000 and the national average of $4,500 by $1,800. While care costs in Santa Rosa are several hundred dollars higher than in Petaluma at $7,048, other cities in Central California have lower rates. Opting for care in Sacramento, where facilities charge $5,225, offers a potential monthly savings of over $1,000. In Vallejo, rates are $1,350 lower at $4,950, and in Stockton, care costs are nearly $2,700 less at $3,649.