Hope that helps.
(Owner-River Valley Property Management) DRE: 01250612) (916) 995-8027
Just email me if you have any other questions or concerns.
The link is : https://apsonline.saccounty.net/CitizenAccess/
The concern, is why are you checking now, after the property has been purchased.
These are all verifications that should have been done prior to Close of Escrow.
Hopefully, you are in the middle of a contract and not "closed".
Hopefully, there are no issues.
Since you already purchased the house I assume you have an appraisal. The appraiser would have measured the house and given square footage. He/she would have also most likely noted if the square footage as measured was different than the square footage on public record, possibly even noting the addition and if it was permitted.
If it matches, or at least is within a few square feet, odds are all the area of the home was permitted.
If not THEN you may want to look further. As outlined by many of the real estate professionals below.
Hope this helps if you would like to provide more detail on what you are wanting to accomplish let me know.