How do I get a permit to convert a room to a bedroom in records?

[Sam Reddy]

Hello,

There is a room in my recent home (@ Livermore, CA) that I bought that has a window, and closet but it is not listed as a bedroom as there is no door. I will be adding a door and I would like to get it officially changed to a bedroom so that records on zillow/redfin/realtor etc show that my home is a 4 bed instead of a 3 bed. How do I go about doing this?

Please advice.

-Sam