Earthquake Safety in Altadena, CA (2026)

1 verified earthquake safety rules for Altadena, California, sourced directly from the municipal code and official government pages.

Verified from official government sources

Seismic Gas Shutoff

LA County Code Title 30 (Residential Code) and Title 28 (Plumbing) require an automatic seismic gas shutoff valve on any new or substantially remodeled residence with natural gas service. Existing homes have no retrofit mandate.

Altadena Seismic Gas Shutoff (LA County Code Title 26 / 30)

Some Restrictions

Full ordinance details →Official source ↗

Looking for Los Angeles County county-wide rules?

County ordinances apply to unincorporated areas and may supplement Altadena city rules.

Earthquake Safety in Los Angeles County →