Info
As of January 1, 2026, the active version of Title 24 is the 2025 edition
Tip
We urge every energy engineer in San Diego to invest the time to thoroughly read and internalize Title 24, rather than simply treating it as a reference document. Because the code only updates every three years, this deep dive yields a high return on investment, providing foundational knowledge that will distinguish your expertise for the duration of your career.
NOTE
When you don’t need to follow Title 24:
Title 24 is primarily a construction and permitting standard, triggered by new builds, additions, alterations (retrofits), and repairs; it does not dictate the methodology for all energy analysis.
For work that does not require a construction permit, such as the following, you are not bound by the code’s prescriptive rules or standardized compliance schedules:
- Benchmarking
- Financial feasibility analysis
- Retro-commissioning savings calculations
- Measurement & Verification (M&V)
In these scenarios, you have the professional freedom to model systems based on actual physics, historical utility data, and real-world operating conditions to generate accurate ROI projections for business decisions. However, a strong command of Title 24 remains essential even here, as it defines the ‘standard practice’ baseline against which high-performance options should be compared.
Sources:
- https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards/2025-building-energy-efficiency
- https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards
- https://energycodeace.com/