What’s changing for accessory dwelling units—and how do those updates impact your day-to-day work?

Join CALBO this week for two ADU-focused webinars, presented in partnership with state agency leaders at the California Energy Commission and the California Department of Housing and Community Development (HCD). These sessions offer direct insight into the latest Energy Code updates and statewide ADU guidance—providing practical tools and real-world context you can apply immediately, from plan review and permitting to navigating evolving state requirements.

2025 California Energy Code: What’s Changed for Accessory Dwelling Units

Wednesday, April 29, 2026
10:00am – 12:00pm
ICC PP Course No. 50210 (0.2 CEUs)
AIA Course No. 7: 2026 (2 LUs)

Registration closes TODAY, Tuesday, April 28

This webinar provides an overview of the 2025 Energy Code and how it applies to accessory dwelling units (ADUs) standards that went into effect on January 1, 2026. Attendees learn the Energy Code’s classification of different types of ADUs, including newly constructed ADUs, conversions of existing structures, additions, and alterations. Discussion covers how the requirements vary depending on the classification and size of the construction, along with how requirements have changed related to whole-building ventilation for ADUs, envelope requirements, and more.

Accessory Dwelling Units in 2026: Exploring the New 2026 ADU Handbook

Thursday, April 30, 2026
10:00am – 12:00pm
ICC PP Course No. 50127 (0.2 CEUs)
AIA Course No. 3: 2026 (2 LU | HSWs)

Registration closes tomorrow, Wednesday, April 29

Join the California Department of Housing and Community Development (HCD) for an in-depth review of the new 2026 Accessory Dwelling Unit (ADU) Handbook, an essential resource for professionals involved in planning, design, or permitting these unit. Learn about the latest changes to California ADU law effective January 1, 2026, what to expect next, and how to ensure compliance with these requirements to support compliant and efficient ADU development in your community. During this webinar, HCD experts guide attendees through the handbook’s latest updates to keep up with recent ADU legislative changes, best practices, and compliance strategies. Building department staff, architects, contractors, and homeowners involved in ADU development will benefit from this comprehensive overview of the updated handbook.

Seats are limited—secure your spot today and stay ahead of the changes. Click here for more information. 

Questions about upcoming training opportunities? Contact the CALBO Office at 916-457-1103 or info@calbo.org.