Factory-Assembled Structures

The Washington Administrative Code (WAC) and Revised Code of Washington (RCW) are maintained and updated by the State Office of the Code Reviser (slc.leg.wa.gov).

If you receive an error message when referencing a link to a specific section of a WAC or RCW, try your search at the Washington State Legislative Search page (search.leg.wa.gov).

2017 FAS Rule Development

The Washington State Department of Labor & Industries is establishing a penalty schedule for infractions for manufactured home installations and modifying the existing rules to comply with new state laws. The changes would be to chapter 296-150I WAC, Manufactured Home Installer Training and Certification Program as a result of House Bill (HB) 1329 (Chapter 10, Laws of 2017), which passed the Legislature in 2017.

The following are the rulemaking documents:

Get an overview of the L&I rulemaking process. A glossary of terms can help in understanding the rulemaking/code adoption process.


Revised Code of Washington (RCW)

Code of Federal Regulations

Rules / Policies

Washington Administrative Code (WACs)

  • Commercial Coaches - WAC 296-150C(app.leg.wa.gov).
  • Factory-Built Housing and Commercial Structures - WAC 296-150F(app.leg.wa.gov).
  • Manufactured Homes - WAC 296-150M(app.leg.wa.gov).
  • Manufactured Home Installer Certification – WAC 296-150I(app.leg.wa.gov).
  • Recreational Park Trailers - WAC 296-150P(app.leg.wa.gov).
  • Recreational Vehicles - WAC 296-150R(app.leg.wa.gov).
  • Factory Built Temporary Worker Housing Structures - WAC 296-150T(app.leg.wa.gov).
  • Concession Units and Medical Units -  WAC 296-150V(app.leg.wa.gov).
  • Temporary Worker Housing Construction Standard - WAC 246-359 (app.leg.wa.gov).

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