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HSChapter 94
U.S. imports of prefabricated buildings of wood (HS 940610) totaled $31.8M in May 2026, traded with 39 countries.
Importers of Prefabricated Buildings of Wood paid $1.7M in duties in May 2026 — an effective duty rate of 18% on $9.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Prefabricated Buildings of Wood imports of $31.8M in May 2026 ran 36% above the year-to-date monthly average of $23.5M.
Last updated: May 2026 dataWood prefabricated buildings — including panelized wall systems, log cabin kits, and modular timber structures — enter the US under a single 10-digit line (9406100000), but their classification can intersect with lumber and wood-products chapters when components are imported separately rather than as a complete building kit. Canada is the dominant supplier, reflecting its proximity, established timber industry, and long history of exporting prefabricated wood structures to the US market. Vietnam and China are also notable sources, and goods from those origins may carry different duty exposure. Importers should confirm that all components of a kit are invoiced and entered together to support the prefabricated-building classification rather than individual lumber or panel classifications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
CBP generally requires that a complete, identifiable kit be entered together to support classification as a prefabricated building. Splitting a kit across multiple entries risks reclassification of individual components as lumber, panels, or other wood products under different chapters. If phased shipment is unavoidable, importers should seek a binding ruling in advance.
At the 6-digit and 10-digit level, this heading does not subdivide by wood species or construction technique — log, panelized, and timber-frame structures all fall under 9406100000. However, species and treatment (e.g., pressure-treated lumber) may affect admissibility under APHIS phytosanitary requirements and should be documented in the import package.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 9406100000 | PREFABRICATED BUILDINGS OF WOOD | $22.2M | 6.05% | 34.55% | $1.3M |
PREFABRICATED BUILDINGS OF WOOD
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 9406100000 | PREFABRICATED BUILDINGS OF WOOD | $4.0M |
PREFABRICATED BUILDINGS OF WOOD
1.3K no
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SWEETGRASS, MT | $7.3M | $113K | -$7.2M |
| LONG BEACH, CA | $2.5M | -- | -$2.5M |
| PRESIDIO, TX | $2.0M | -- | -$2.0M |