Seismic — Gas Shut-off Valve & Earthquake Disclosures
Automatic gas shut-off valves and fault/seismic-hazard disclosures at sale.
Several jurisdictions — including the cities of Alameda and Berkeley and unincorporated Alameda and Contra Costa counties — require an automatic seismic gas shut-off valve to be installed at point of sale. Statewide, the seller must also disclose whether the property sits in an Alquist-Priolo Earthquake Fault Zone or a state Seismic Hazard Zone via the Natural Hazard Disclosure, and a one-to-four-unit, light-frame home built before 1960 also gets the Homeowner's Guide to Earthquake Safety and an Earthquake Hazards Disclosure Statement.
Because the gas-valve requirement is strictly local, the same listing can carry it in one city and not in the next town over. LetterScript resolves it per address rather than guessing from the county.
The property is in a jurisdiction with a seismic gas-valve ordinance, or in a mapped fault/seismic-hazard zone.
Local gas-valve ordinances; Natural Hazard Disclosure (Civ. Code §1103); earthquake fault zones (Pub. Res. Code §2621.9); seismic hazard zones (Pub. Res. Code §2694); Homeowner's Guide to Earthquake Safety (Gov. Code §8897.1).
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Informational only — not legal advice. Rules change and the list may be incomplete; always confirm each requirement with the city or county before close.