1. Start with the geography you actually serve
El Sobrante is recorded as a CDP in Contra Costa County. That county relationship matters when you review a Local Services Ads service area, but it does not tell you which nearby locations Google may show, which callers are appropriate for your firm or whether a broader territory is operationally sensible. Your service area should reflect where you accept matters and where your lawyers can work effectively, not simply the boundaries of a census geography.
Recommended approach
Bring Bosseo your actual intake geography: El Sobrante, relevant Contra Costa County locations and any other areas your firm intentionally serves. Review each proposed location against licensing, court coverage, travel, matter economics and staff capacity. Keep the decision about geographic coverage separate from any claim about local demand.
