PE-stamped structural drawings are required in Utah for all new construction (residential and commercial) requiring a building permit; additions involving structural modifications; retaining walls retaining more than 4 feet of unbalanced fill per IRC R404; decks and exterior structures with significant spans; and any project where the building official requires structural engineering. In practice, essentially all new construction on the Wasatch Front requires PE-stamped structural drawings because most communities are in Seismic Design Category D per ASCE 7-22 — which requires structural engineering to produce the calculated shear wall design, hold-down hardware schedule, and connection details that SDC D demands. Utah Code 58-22 (Engineering Practice Act) governs when a licensed PE is required in Utah.