January 29, 2026
2026-01-29T09:00:00
I-REN C&S Training: Accessory Dwelling Units (ADUs)
Thursday, January 29, 2026
Held in partnership with Energy Code Ace! This hour-long virtual course focuses requirements on the 2025 California Building Energy Efficiency Standards (Energy Code or Title 24 Part 6) for accessory dwelling units (ADU). We will discuss how to identify the ADU type and its impact on Energy Code requirements for envelope, mechanical, photovoltaics (PV), battery energy storage system or battery readiness, and ECC (formerly known as HERS) measures. We will also review how the compliance metrics differ depending on ADU type, including the new compliance metrics for New Construction ADUs.
Learning objectives include:
- Establish if an ADU design is considered an Alteration, Addition, or a new residential building per the Energy Code
- Discuss the envelope (roof, walls, floors, fenestration) requirements associated with the ADU type (Alteration, Addition, New Construction) under the 2025 Energy Code
- Recognize the renewable energy requirements of ADU type including photovoltaics (PV), battery energy storage system, and battery readiness
- Determine mechanical equipment requirements, including any ECC (formerly known as HERS) verification measure options that provide ADU design flexibility, and how the new compliance metrics may impact those choices
ICC CEUs: 0.1
Date: Thursday, January 29, 2026 9:00am - 10:30am