Factory-Assembled Structures

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2015 FAS Rule Development

The Factory Assembled Structures (FAS) program is proposing amendments to sections of Chapter 296-150M WAC for Manufactured Homes. The program reviews the rules on a regular basis to ensure consistency with federal and national safety code requirements and industry standards, to clarify the existing rules, perform housekeeping, etc.

The following are the proposed rule changes: Chapter 296-150M WAC Proposed Language (157 KB PDF).


July 21, 2015 Preproposal (CR-101) (128 KB PDF)
September 2015 Proposed Rule-Making (CR-102) (135 KB PDF)
October 30, 2015 Public Hearing at Tumwater L&I Office at 9 a.m.
(Comments due by 5 p.m.)
Public Hearing Information Packet (48 KB Word)
November 2015 Adoption (Rule-Making Order CR-103)


The tentative effective date of the rules is January 1, 2016.


Revised Code of Washington (RCW)

Code of Federal Regulations


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).
  • Manuafactured 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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