Factory-Assembled Structures

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2015 FAS Rule Development

The Factory Assembled Structures (FAS) Program is adopting amendments to Chapter 296-150M WAC, Manufactured Homes. The program reviews the rules on a regular basis to ensure the rules are consistent with the latest safety code requirements and industry standards for mobile and manufactured homes, to update the existing rules, for rule clarity, and housekeeping changes.

The following are the new rule changes: Chapter 296-150M WAC Language (159 KB PDF).


July 21, 2015 Preproposal (CR-101) (128 KB PDF)
September 22, 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)
December 22, 2015 Adoption (Rule-Making Order CR-103) (224 KB PDF)


The effective date of the rules is February 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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