Country: United States of America

Architectural code and regulatory reference for projects within any US state, territory, or D.C. Activate this skill on any US city/state reference, USD currency, square feet / imperial units, mention of "IBC"/"IRC"/"IECC"/"NFPA"/"ASCE 7"/"ADA"/"Title 24"/"CalGreen"/"NYC BC", state building department/AHJ references, or LEED/ENERGY STAR.

1. Regulatory Hierarchy

The US operates as Archetype B (National Model + State/Local Adoption) with significant local variation. There is no federal building code; the Authority Having Jurisdiction (AHJ) -- which may be the city, county, state, or special district -- decides which model code edition is in force and with what amendments.

1.1 Authority Stack