What is the threshold percentage for substantial damage to a dwelling according to ICC?

The threshold percentage for substantial damage to a dwelling, as defined by the International Code Council (ICC), is set at 50% or more destroyed. This means that if a structure is determined to have sustained damage that equals or exceeds 50% of its overall value, it is classified as substantially damaged. This classification is crucial in regulatory and insurance contexts, as it often dictates rebuilding requirements, eligibility for assistance, and compliance with building codes.

In the context of the other options, 25%, 33%, and 75% do not align with the established standard set by the ICC. A threshold of 25% would be too low to consider a dwelling substantially damaged; it would only indicate minor to moderate damage. Similarly, 33% also fails to meet the threshold, as it does not signal a significant structural impairment. On the other hand, a 75% threshold is excessively high, and most jurisdictions use the 50% benchmark to determine the point at which a building must be addressed under substantial damage criteria.