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On May 30, the passing of California AB368 Bill marks a significant milestone for the adoption of Passive House in the State, and across the Country.

In a major move toward improving building performance and reducing carbon emissions, California Assembly member Chris Ward has introduced AB 368—a bill focused on advancing California AB 368 Passive House compliance. This legislation tasks the California Energy Commission (CEC) with evaluating Passive House standards as a potential alternative pathway to the state’s Title 24 energy code.

California AB 368 Passive House compliance refers to the potential approval of Passive House standards as an alternative method to meet California’s building efficiency requirements under Title 24. If adopted, this could give architects, builders, and developers more flexibility in achieving energy efficiency goals through a performance-based framework rather than prescriptive measures.

This push for California AB 368 Passive House compliance comes at a time when the state is grappling with severe climate challenges—including wildfires, extreme heat, and water shortages. Passive House buildings are inherently more resilient, healthy, and energy-efficient, making them a strategic asset in addressing both environmental and public health goals.

The bill is sponsored by Climate Action California, an organization advocating for bold climate solutions. Its introduction reflects a growing recognition that traditional building codes may need to evolve to support deeper energy savings and long-term climate strategies.

The Climate Action California organization has lead the charge in promoting the AB368 Bill to make Passive House compliance a reality for California. Emu, Passive House California, and other likeminded organizations have supported the bill.

If adopted, California AB 368 Passive House compliance could pave the way for more sustainable construction practices across the state. By integrating Passive House design into the regulatory framework, California has an opportunity to lead the nation in energy-efficient building innovation—while offering residents safer, healthier, and more climate-resilient homes.

Join us on June 17 at 12pm PT for a free presentation onwhy Passive House matters for the California unique conditions.

Find out what otherfree building science presentationswe have planned over the Summer, including a panel discussion with Passive House builders on September 9.