Understanding Title 24 for ADUs in California
Accessory Dwelling Units (ADUs), also known as granny flats or in-law units, are separate living spaces located on the same property as the primary residence. Whether newly built or converted from an existing structure, ADUs in California must comply with Title 24 energy efficiency regulations to obtain a building permit.
Our ECC Title 24 Reports ensure your ADU meets all necessary energy efficiency standards, helping you navigate the approval process efficiently.
How Title 24 Applies to ADUs
Energy Efficiency Requirements
Title 24 sets strict energy efficiency standards for ADUs to help reduce energy consumption. Compliance includes:
✔ Insulation requirements for walls, roofs, and floors
✔ Energy-efficient windows and doors
✔ High-efficiency heating and cooling systems
Lighting Standards
Title 24 requires ADUs to meet lighting efficiency standards to reduce energy consumption and greenhouse gas emissions. This includes:
✔ LED lighting fixtures
✔ Lighting controls, including dimmers and occupancy sensors
✔ Lighting power density regulations
Wall & Roof Insulation
The building envelope of an ADU—including walls, roofs, and floors—must meet Title 24 insulation and air leakage requirements to ensure energy efficiency and indoor comfort.
How to Obtain a Building Permit for Your ADU
Complying with Title 24 California residential ADU regulations requires careful planning and Title 24 performance calculations using California Energy Commission-approved software.
Our Process:
1️⃣ Plan Review – Our experts carefully review your ADU project plans, ensuring compliance with local building codes and zoning laws.
2️⃣ Title 24 Compliance Report – We generate a detailed report covering energy efficiency, structural integrity, and environmental impact.
3️⃣ Building Permit Application – Our compliance report provides all the necessary documentation for submission to your local building department.
Order Your Title 24 Compliance Report for ADUs
Ensure a smooth and efficient permitting process for your ADU in California with our expert ECC Title 24 Reports.