Classification Detail

What activity does NAICS 236115 include?

Direct answer: The Census detail includes single-family housing construction and on-site assembly of modular or prefabricated houses.

Verify wording on the official NAICS page.

What NAICS Does Not Do

Does a NAICS code prove product approval?

Direct answer: No. NAICS classifies economic activity; it does not replace building-code approval, contractor licensing, product certification or tax advice.

Scope Separation

How should a modular contract divide factory and site work?

Direct answer: Separate module manufacture, transport, crane placement, structural connections, weather sealing, utilities and finishes. Each activity may involve a different responsible company and classification.

Bid Documentation

What should contractors state?

Direct answer: Describe the actual work performed, project location, licensing basis and subcontracted scopes. Avoid selecting a code only because its description contains the word modular.

For building-level coordination, the International Building Code overview provides useful context, but the project must follow the locally adopted rules.

Related ZH-ENG Modular Building Support

What should a project inquiry include?

Direct answer: State the destination, occupancy, room schedule, climate, design loads, utilities, transport limits, installation split and approval route. Buyers can review ZH-ENG modular building solutions before confirming the project configuration.