The 2021 IECC addresses energy efficiency on several fronts including cost, energy usage, use of natural resources and the impact of energy usage on the environment.

Resource added for the Fire Science Program 305318.

The 2024 International Codes (I-Codes) have undergone substantial formatting changes as part of the digital transformation strategy of the International Code Council (ICC) to improve the user experience. The changes, promoting a cleaner, more modern look and enhancing readability and sustainability, include: * Single column text format and modernized font styles improves readability * QR Codes replace vertical margin sidebars and arrows to identify code changes more accurately * Shading for table headers and notes improves locating tables and applicable notes * Grouping of associated content brings tables and figures immediately after the parent section * Users have capability to validate authenticity of their book and register it with the ICC to receive incentives. The 2024 IEBC encourages the use and reuse of existing buildings. This code covers repair, alteration, addition and change of occupancy for existing buildings. and historic buildings, while achieving appropriate levels of safety without requiring full compliance with the new construction requirements contained in the other I-Codes.

"This document is Part 2.5 of 12 parts of the official triennial compilation and publication of the adoptions, amendments and repeal of administrative regulations to California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part is known as the California Residential Code"--Preface.

A comprehensive code for homebuilding, bringing together all building, plumbing, mechanical, and electrical provisions for one- and two-family residences, and establishing minimum regulations using prescriptive provisions.