LA County Code Title 31 adopts the California Green Building Standards Code (CALGreen, Title 24 Part 11) with local amendments. Mandatory measures cover construction-waste diversion, water-efficient fixtures, EV-ready parking, and indoor air quality for new buildings.
Title 31 of the LA County Code adopts CALGreen with county-specific amendments effective for permits issued after January 1, 2023, aligned with the 2022 code cycle. Mandatory residential measures include 65% construction-waste diversion, 20% reduction below baseline indoor water use, low-VOC paints and finishes, and EV-ready conduit for one parking space at single-family homes. Nonresidential additions over 1,000 sq ft trigger commissioning, daylighting, and bicycle-parking minimums. Voluntary Tier 1 and Tier 2 measures encourage cool roofs and on-site renewables. LACoDPW Building & Safety enforces through plan check; reach codes in some unincorporated areas push electrification.
Failure to provide CALGreen documentation triggers plan-check rejection and certificate-of-occupancy holds. Post-occupancy violations such as removing required low-flow fixtures result in administrative citations up to $500 per day under Title 26.
See how other cities in Los Angeles County handle green building code.
See how Norwalk's green building code rules stack up against other locations.
Quick Compare
Help us keep this page accurate. If you notice an error or outdated information, let us know.