Try to find the water heater model number and serial numbers before you call so we can identify the age, warranty and any other pertinent information about your existing unit. (This info can be found on a large sticker usually on the side of the water storage tank.)
These days, most local communities in LA County require a permit for a water heater installation (this will not delay any work, it will just alert the city so you can schedule a safety inspection after the installation).
Call us and to find out the cost of a permit in your jurisdiction.
Local Water Heater & Plumbing Permits – Los Angeles County