Modular Building Units of Steel

Steel modular building units of steel are subject to Section 232 tariffs, which apply broadly to steel articles. The effective cost impact depends on the country of origin and whether any product-specific exclusions or quota arrangements apply. Because Section 232 rates and exclusion availability change frequently, importers should confirm current status with a customs broker before finalizing sourcing decisions.

Modular building units under 940620 are self-contained, three-dimensional room or space modules designed to be stacked or connected on-site. Prefabricated steel buildings under 940690 typically consist of structural components — columns, beams, wall panels — that are assembled into a building on-site rather than arriving as finished room modules. The degree of factory completion and the three-dimensional versus flat-pack nature of the product are the key distinguishing factors.