A legal unit will have a separate meter for Edison, and the Gas company.
If your unti is sharing a meter with the front house, you may very well have an illegal unit.
If you want to be for sure check with the county tax assessor's office, they can confirm if the unit is legal.
Kawain Payne, REaltor
1- Check with The city of Santa Ana for Permit go in person
2- Go Public Record office City Of Santa Ana
3- Look at the other houses in the area.
4- Look for separate Gas, Water and Electrical Meters
The Most important of all is to check with the city and have an expert to determine it for you.
A unit is determined to be legal when all appropriate permits have been completed (signed off by the City). Ussually permits can be found in the City's website http://www.ci.santa-ana.ca.us/pba/ You may also stop by the City M-T to make sure you get all the details; just ask for any permits issued on (address) and they will let you see them right at the desk.They can get copies of the same for you at a low price.
City of Santa Ana requires a business license to rent a unit in Santa Ana. Annual dues are about $114 per property and you don't need to take a course to get the business license.
Hope this helps.
DRE Lic. # 01255516
RE/MAX Metro Real Estate Services