Attached ADU Title 24 Reports / ADU Title 24 Energy Calculations

Title 24 Reports and Energy Calculations for Attached ADUs

Attached ADUs, also known as JADUs, share common elements with the existing dwelling, such as walls, ceilings, or floors. Here are various scenarios for Title 24 compliance and energy calculations:

• “ADU Addition”: This involves constructing a new ADU or transforming an existing unconditioned space (e.g., attached garage or basement) into an ADU.
• “ADU Alteration”: In this scenario, previously conditioned space, often part of the existing living area, is converted into an ADU.
• “ADU Addition+Alteration”: This combines the construction of newly conditioned space with the conversion of existing conditioned areas.

Key Facts for Attached ADUs:

• No solar PV requirements.
• Existing walls and extensions of existing walls are exempt from rigid insulation requirements if proposed insulation is R-15 or greater.
• All ADUs, as new dwelling units, must adhere to IAQ (Indoor Air Quality) ventilation requirements, regardless of size, with no exceptions.

Examples of ADU Scenarios:

• “ADU Addition” Examples:
  • Building a new ADU with a shared wall with an existing home.
  • Converting an existing attached unconditioned garage into an ADU.
• “ADU Alteration” Examples:
  • Converting existing conditioned space, like a conditioned basement, into an ADU or JADU.
  • Transforming existing living rooms into ADUs or JADUs.
• “ADU Alteration+Addition” Examples:
  • Combining the conversion of existing living rooms into ADUs with the construction of new living areas.
  • Converting existing living rooms into ADUs while also converting a garage.

Explore these various ADU scenarios to ensure compliance with Title 24 standards and energy calculations, all tailored to your project’s unique requirements.

Additionally, there are other scenarios like “Detached ADU” and “Newly Constructed ADU” that may require different compliance measures.