The International Building Code (IBC) establishes minimum requirements for building systems through both prescriptive and performance-based provisions. Built on broad, flexible principles, it encourages the use of innovative materials, construction methods, and building designs while maintaining essential safety standards.

As a model code, the IBC is designed to protect public health, safety, and general welfare by establishing minimum regulations for the design, construction, alteration, and maintenance of buildings and structures. It covers critical aspects such as structural integrity, means of egress, sanitation, lighting, ventilation, accessibility, energy efficiency, and life safety for both new and existing buildings, facilities, and systems.

The IBC applies to virtually all occupancy types, including one- and two-family dwellings and townhouses that fall outside the scope of the International Residential Code (IRC). The IRC governs detached one- and two-family dwellings and townhouses as identified in the exception to Section 101.2 and the definition of “Townhouse” in Chapter 2. It may also be used for the construction of qualifying live/work units, as defined in Section 508.5, and owner-occupied bed-and-breakfast establishments with five or fewer guest rooms.

Unless specifically exempted, the IBC applies to all buildings and structures. Activities that are exempt from permit requirements are identified in Section 105.2 of the code.169