Accessory Dwelling Units (ADU) | Energy Code Ace

2025 Code Breaker: Accessory Dwelling Units (ADU) | 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

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Presenter:

Nick Brown is President of Build Smart, an independent energy consultancy specializing in California energy modeling, energy code, and building performance that supports builders and architects in designing energy-efficient buildings.  Nick is a Certified Energy Analyst (CEA) for residential and an Associate Energy Analyst (AEA) for nonresidential construction by the California Association of Building Energy Consultants (CABEC).  He is a Subject Matter Expert on the Energy Code Ace statewide education team and teaches classes for Southern California Edison on Net Zero Design, All-electric Homes, Heat Pumps, and Selling Clean Energy Homes.  As part of a CalSEED team, Nick is currently researching phase change material applications in HVAC systems.  Nick was elected to the Board of Directors of CABEC beginning in 2018.  He holds a BA in Economics from Princeton University and an MBA in Manufacturing from the University of Michigan.  He remodeled his own home in 2014 in a deep energy retrofit and has written and presented extensively on Net Zero buildings, high-performance walls, and energy efficient building.  Prior to starting Build Smart, he served as President of Merlex Stucco for 15 years, a $15 million Southern California stucco manufacturer.