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Records copied from Washington State L&I and the Oregon Construction Contractors Board.

License classification

Sanitation System / Side Sewers contractors in Washington

Records the state files classify as “Sanitation System / Side Sewers”. The classification is the agency's own, not a category we assigned.

  • 113 records
  • Washington L&I 113
  • Oregon CCB 0
  • WA data as of July 2026
107 unexpired recordsInclude expired
Both statesWashington113
Auburn4Yakima4Bellingham3Ellensburg3Snohomish3Yelm3Arlington2Athol2Camano Island2Everett2Kent2Mount Vernon2

Showing 1 to 25 of 107 records

What this classification means

Washington and Oregon issue different legal instruments. A Washington registration under “Sanitation System / Side Sewers” is a contractor registration with L&I; an Oregon license under a comparable endorsement is issued by the CCB. They are not the same credential and neither one transfers to the other state. A contractor working both sides of the river needs both. This page reproduces whichever classification the agency recorded, verbatim.

113Records in this classification
113Washington
0Oregon
AuburnLargest concentration

Sanitation System / Side Sewers contractors by city

Auburn4Yakima4Bellingham3Ellensburg3Snohomish3Yelm3Arlington2Athol2Camano Island2Everett2Kent2Mount Vernon2

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Published by Contractor Marketing NW, Seattle, Washington. This directory reproduces public license records and is not affiliated with, endorsed by, or operated by any state agency.Washington data as of July 2026. Sources and method