Browse the full Resources Index
Building codes are not static documents handed down once and left alone. In the United States, most jurisdictions build their local requirements on a foundation of model codes published by the International Code Council, an organization that develops and revises the International Building Code, the International Residential Code, and a family of related documents on a regular cycle. Understanding how that cycle works helps explain why the code requirements affecting a repair in one year can differ from those affecting a similar repair a decade earlier, even on the same street.
The ICC development process runs on roughly a three-year cadence. Code change proposals are submitted by building officials, trade associations, manufacturers, engineers, and members of the public, and each proposal moves through committee hearings where testimony is taken and technical justification is examined. Proposals that survive committee review then go to a public comment period and a final action hearing, where voting members, largely government building officials, decide which changes are incorporated into the next published edition. This structure is intended to keep code development open to technical input while placing final adoption authority with the officials who will enforce the result.
Publishing a new model code edition is only the first step, because a model code has no legal force until a state or local government formally adopts it, often with amendments. Some states adopt a new edition close to its release date; others lag by several years or adopt only portions of a given edition while retaining older provisions elsewhere. Minnesota, like most states, works through this adoption process at the state level before local jurisdictions apply it, which means the code edition governing a repair depends on when that state or local government last updated its adopted code, not simply on what the ICC most recently published.
This lag matters directly in repair work following storm damage, because the code requirements a contractor and building official apply are whatever edition is currently in force in that jurisdiction on the date the permit is issued, not the edition in force when the original structure was built. A roof, deck, or wall assembly built decades ago under an older code may need to meet updated requirements once it is opened up for repair, and that gap between original construction standards and current code is a recurring theme across many of the specific topics covered elsewhere in this series, from decking fastening patterns to insulation values to ventilation ratios.
The ICC is not the only body whose standards work their way into an adopted building code. Electrical work is generally governed by the National Electrical Code published by the National Fire Protection Association, mechanical and fuel gas provisions draw on the International Mechanical Code and International Fuel Gas Code, and energy provisions typically reference the International Energy Conservation Code, each maintained on its own update cycle and adopted, again, through state and local action rather than automatically. A jurisdiction can therefore be current on one code family while running an older edition of another, and confirming which edition of which specific code applies to a given trade or component is part of the groundwork behind an accurate repair scope. Building officials, and in some jurisdictions a local board of appeals, are the ones positioned to answer that question definitively for a specific address and permit application.
This article is general education about how the appraisal process commonly works. It is not legal advice, and specific procedures can vary by state and policy.
Russ Lis is a working property insurance appraiser and umpire based in Minnesota, serving clients nationwide. Contact Appraisal Resolution.