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.
California Health & Safety Code 19200 et seq. authorized counties to require seismic gas shutoff valves. LA County adopted requirements via Title 30 Section R301.1.4 and Title 28 (Plumbing) — any new residential construction, addition exceeding $10,000, or change of service must install a listed earthquake-actuated shutoff valve on the gas service line. Existing single-family residences are not required to retrofit unless they undergo qualifying remodels. Multi-unit residences and commercial buildings have parallel requirements under Title 28.
Failure to install on a permitted remodel will prevent final inspection. No retroactive enforcement on existing single-family homes.
Altadena, CA
LA County allows backyard chickens in R-1 zones in unincorporated areas (including Altadena) subject to coop setbacks under LA County Code Title 10 and Title...
Altadena, CA
LA County Code Section 10.32.010 prohibits dogs running at large in any public place or private property other than the owner's, unless restrained by a chain...
Altadena, CA
Trimming protected oak trees (≥8 in DBH) requires an Oak Tree Permit if the work enters the protected zone or removes >25% of crown. Street trees in the publ...
Altadena, CA
In Altadena's Very High Fire Hazard Severity Zones, grass and weeds must be kept under 3 inches under LA County Fire Code Title 32 defensible-space rules.
Altadena, CA
LA County Fire's Brush Clearance program also functions as the weed-abatement ordinance — vacant and improved lots must keep weeds and grasses cut to under 3...
Altadena, CA
Outdoor watering in Altadena (served by Lincoln Avenue Water Co., Las Flores Water Co., Rubio Cañon, and Kinneloa Irrigation District) is limited to 2 days p...
Side-by-side rule comparisons with other cities in Los Angeles County.
See how other cities in Los Angeles County handle seismic gas shutoff.
See how Altadena's seismic gas shutoff rules stack up against other locations.
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