2025 California Title 24 Code Updates — What Architects, Builders, and Designers Need to Know

By Sunwoo Kim • Published 11/15/2025

2025 California Title 24 Code Updates — What Architects, Builders, and Designers Need to Know California’s **2025 Title 24 Building Standards** introduce one of the most comprehensive code overhauls in recent memory. Effective **January 1, 2026**, the updates reshape the rules for building safety, electrification, energy efficiency, and sustainability across all project types—from single-family dwellings to high-rise towers. Below is a summary of the key changes by code **Part**, highlighting what matters most for architectural design, engineering coordination, and construction planning.