Shingle roofs in San Diego must be installed under California code and local city rules

https://paxtoniktt237.novacrestiq.com/posts/hot-mop-roofs-in-san-diego-a-time-tested-low-slope-option

Shingle roofs in San Diego must be installed under California code and local city rules, and reroofing often requires a permit, especially when roof covering renewal is involved.