S37 - ICC - International Existing Building Code
Kind: Model code Group: Professional practice and standardized documents
URL: https://www.iccsafe.org/products-and-services/i-codes/2021-i-codes/iebc/
Why this source was used
The IEBC is the model code specifically designed for repair, alteration, addition, and change of occupancy in existing buildings. It provides three compliance paths (prescriptive, work-area, performance) and defines alteration levels 1–3, which determine how much of a renovation must meet current new-construction standards. The IEBC is the primary code framework distinguishing renovation from new construction and is essential for understanding permit triggers, code-compliance escalation, and the regulatory environment for renovation projects.