Codes & Permits

IBC

Also known as: International Building Code

The model building code for commercial and high-rise residential construction in the United States, adopted in some form by all 50 states.

The International Building Code (IBC) is the model code published by the International Code Council (ICC) governing commercial buildings, high-rise residential, and similar structures. It covers structural design, fire and life safety, accessibility, energy efficiency, mechanical, plumbing, and electrical systems by reference. The IBC is updated on a 3-year cycle (most recent: 2024).

All 50 states adopt some version of the IBC, though local jurisdictions can amend it. As a result, the specific code in force varies by jurisdiction even within a state. For residential construction (one- and two-family dwellings), the related IRC (International Residential Code) typically applies instead of IBC. Always verify the current adopted code with the local building department before bid or design.

Frequently asked questions

What does the IBC cover?+

Commercial buildings, high-rise residential, schools, hospitals, restaurants, retail, etc. Structural design, fire and life safety, accessibility, MEP, energy. The IRC (International Residential Code) covers one- and two-family dwellings.

Is the IBC the same in every state?+

No. All 50 states adopt some version of the IBC, but the specific edition (2018, 2021, 2024) and local amendments vary by jurisdiction. Always verify the adopted code with the local building department.

How often is the IBC updated?+

Every 3 years. Most recent edition is 2024. Jurisdictions adopt new editions on their own schedule, typically lagging the publication date by 1 to 5 years.

Related terms

AHJ

The local agency or official with the legal authority to interpret and enforce building, fire, and life-safety codes.

Permit

AHJ-issued authorization to perform specific work on a building. Required before construction begins.

Inspection

A regulatory review by the AHJ verifying completed work complies with code, required at multiple project milestones.

ADA Compliance

Construction requirements under the Americans with Disabilities Act ensuring buildings are accessible to people with disabilities.