HS Code for Modular building

Modular buildings are classified under HS code 9406.90 as prefabricated buildings. This heading encompasses structures that are either fully assembled in a factory or presented as a set of components to be assembled on-site. Subheading 9406.90 serves as the residual category for buildings not made of wood (9406.10) or specific steel modular units (9406.20). To qualify under 9406, the product must have the essential character of a building, meaning it provides a closed environment for habitation, storage, or work. This includes structures made of concrete, aluminum, or composite materials. The classification includes the internal fittings that are typically part of the building, such as electrical wiring, plumbing, and heating systems, provided they are presented with the building. Modular buildings are distinguished from simple structural components by their completeness; they are intended to function as a standalone unit or a significant part of a larger structure once placed on a foundation. This classification is vital for international trade as it separates finished architectural solutions from raw construction materials.

Products Included

• Prefabricated concrete modular units
• Aluminum-framed portable offices
• Composite material modular houses
• Plastic-based temporary shelters
• Prefabricated greenhouses (not of wood)

Common Misclassification

Modular buildings are often misclassified under HS code 73.08 (iron or steel structures) or 76.10 (aluminum structures). The difference is that 73.08 and 76.10 cover structural parts like pillars, beams, and roofing that do not constitute a complete building. If the shipment contains all the parts necessary to form a finished building, it must be classified under 94.06. Another common error is classifying them as furniture under other headings in Chapter 94, but if the unit is a habitable structure, 94.06 takes precedence.

FAQ

What is the HS code for modular building?

The HS code for modular buildings (other than wood or specific steel units) is 9406.90.

What defines a prefabricated building for HS classification?

A prefabricated building is defined as a structure finished in a factory or sent as a collection of elements to be assembled on-site, designed for use as a dwelling, office, school, or similar purpose.