American Vandal is a Mockumentary, which recently premiered on Netflix. The series sets in Oceanside, California, but was probably shot in the area of Venice and Los Angeles.
The Hanover High School
Some might recognize the building, as it has been used as filming location in several movies and series, e.g. Carrie (1976), Star Wars (1977), Popular (1999), Crazy/Beautiful (2001), The Glass House (2001), Old School (2003), Freaky Friday (2003), Havoc (2005), Project X (2012), Modern Family (2013) and Teen Wolf (2011). Especially the large display panel above the entrance of the building is particularly noticeable. Unfortunately it seems that the parking area is not there. Furthermore the address of the Hanover High School is fictitious, as there is no Beachwood Dr. in Oceanside, only the zip-code is correct.
The Oceanside Sign
The sign really exists and stands unmissable at the harbour of Oceanside.
Also the pier of Oceanside is visible in a few scenes.