U.S. imports of Prefabricated Buildings (SITC 81100) totaled $65.5M in August 2026, imported from 65 countries.
Importers of Prefabricated Buildings paid $8.8M in duties in August 2026, an average duty rate of 13.47% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataPrefabricated buildings — structures manufactured off-site and assembled at their final location — occupy a distinct commercial niche serving construction, modular housing, and temporary infrastructure markets. Steel and aluminum-framed prefab structures may be subject to Section 232 tariffs depending on their material composition and country of origin, making origin documentation a critical compliance step. Classification can hinge on whether the shipment constitutes a complete structure or component parts, a distinction that affects both duty treatment and valuation.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
3.5K import shipments a month
When a prefabricated building is shipped as a complete, unassembled kit with all components included, it is generally classified as a whole under the prefabricated buildings heading. However, if components are imported separately at different times or from different suppliers, each shipment may need to be classified individually, potentially under different headings.
Prefabricated buildings with significant iron or steel content may be subject to Section 232 tariffs, depending on how the article is classified and the country of origin. Importers should verify whether the finished structure or its steel components trigger Section 232 exposure and document the mill origin of steel inputs accordingly.
Basic heading 133 of 419 in section 8
Basic heading 81100 · $65.5M of $46.9B
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Imports · August 2026
origin
Canada and Mexico together supply 58% of it. China pays 45.1% duty; Mexico 5.5%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$65.5MYoY · free account
Exports
$41.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $723.8M of Prefabricated Buildings and exported $407.5M.
Through August 2026. Source: U.S. Census Bureau.