California’s Title 24 (2025 Update) Effective January 1, 2026
California continues to set the pace for energy codes nationwide. The latest revision of Title 24, Part 6, will officially take effect on January 1, 2026, but the impact on project planning, design, and construction is already being felt. Developers, architects, and lenders should begin aligning their teams with these requirements now to avoid surprises later in the process.
What’s Changing in Title 24 (2025 Update)?
According to the California Energy Commission, here are four major areas of change:
● HVAC System Performance – The new code strongly favors electric heat pump systems over gas-fired systems. Performance criteria have been tightened, including more rigorous standards for controls, sizing, and refrigerant verification.
● Interior and Exterior Lighting Control – non-residential projects must include light sensors, occupancy controls, and dimming systems in more areas (such as warehouses and parking lots).
● Solar + Storage Readiness – New requirements will expand PV system mandates and introduce battery storage readiness for more building types, including nonresidential and multifamily projects.
● Electrification of Appliances – The 2025 updates accelerate the shift away from natural gas by requiring electric options for space heating, water heating, cooking, and pool heating in most new construction projects.
Why This Impacts Projects Outside California
While Title 24 is a California-specific regulation, national developers are applying the same energy strategies across portfolios to maintain design consistency, simplify procurement, and future-proof their buildings. We’re already seeing these California-based standards influence projects in Nevada, Arizona, and Colorado, particularly for firms that prefer unified design criteria across multiple states.
Key Risks and Considerations
The 2025 update is more than a change in code. It introduces complexity at every stage of development:
● Cost Estimation – More efficient envelopes and HVAC systems, along with solar and battery readiness, increase up-front construction costs. Early-stage cost modeling is critical to align expectations with reality.
● MEP Design Coordination – Integrating electric systems into the design adds layers of technical detail that must be carefully coordinated across disciplines. Heat pump requirements alone can drive redesigns of mechanical, electrical, and plumbing systems.
● Permitting Delays – Municipalities are preparing to enforce the new standards, which could lead to longer plan review times as jurisdictions adapt to the changes. Early engagement with permitting authorities is highly recommended.
How Moran Consultants Can Help
The 2025 update to Title 24 is a clear signpost of where construction codes are heading: more efficient, more electric, and more integrated. Starting now ensures that your project won’t be caught off guard when enforcement begins.
With 50 years of experience helping developers navigate evolving building codes, Moran Consultants is well-positioned to support your team in meeting the demands of Title 24 and understanding how it affects projects both in California and beyond.
Have questions about Title 24 or how it affects your upcoming project?
We’re here to help! Give us a call at 866-545-3350 or contact us online to learn more.