U.S. imports of Prefabricated Metal Buildings & Components (NAICS 332311) totaled $23.5M in August 2026, imported from 43 countries.
Importers of Prefabricated Metal Buildings & Components paid $3.6M in duties in August 2026, an average duty rate of 15.30% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataPre-engineered metal building systems — including structural frames, roof and wall panels, and connecting hardware shipped as a kit for field assembly — are a widely traded product category serving commercial, agricultural, and industrial construction markets. Imported prefabricated metal buildings are generally classified under HTS Chapter 94 or Chapter 73 depending on whether the shipment constitutes a complete building kit or individual structural components, and that distinction carries meaningful duty implications. Steel-intensive content makes these products sensitive to Section 232 tariff exposure on upstream inputs.
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1.5K import shipments a month
Generally yes. A complete, unassembled building kit may be classified as a prefabricated building under HTS Chapter 94, while individual structural components (columns, rafters, purlins) imported separately typically fall under Chapter 73 structural metal subheadings. The GRI 2(a) rule for incomplete or unassembled articles is central to this analysis.
Standard commercial entry documentation applies (commercial invoice, packing list, bill of lading), but importers should also be prepared to provide engineering drawings or specifications that identify the building's structural components, as CBP may request these to confirm classification and verify that Section 232 steel/aluminum content is properly accounted for.
National industry 2 of 3 in naics industry 33231
National industry 332311 · $23.5M of $523.3M
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Imports · August 2026
origin
Canada and Mexico together supply 60% of it. China pays 46.3% duty; Sweden 4.1%.
customs district
Census does not publish district detail for this classification system.
destination
Census publishes state breakdowns for NAICS to the 4-digit level only. See NAICS 3323 for those.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$23.5MYoY · free account
Exports
$21.9MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $245.8M of Prefabricated Metal Buildings & Components and exported $158.7M.
Through August 2026. Source: U.S. Census Bureau.