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Washington modular building worker prevailing wage, county by county

A modular building worker's prevailing wage on Washington public works runs from $17.13 an hour in Yakima County to $17.13 in Adams County, wages and fringe benefits together. The median county is $17.13.

Main modular building worker classification in each county, L&I period 2026-2, commercial rates. Checked October 24, 2026.

Pierce County modular building worker: $17.13 per hourAdams County modular building worker: $17.13 per hourPend Oreille County modular building worker: $17.13 per hourKing County modular building worker: $17.13 per hourChelan County modular building worker: $17.13 per hourKittitas County modular building worker: $17.13 per hourGarfield County modular building worker: $17.13 per hourGrant County modular building worker: $17.13 per hourOkanogan County modular building worker: $17.13 per hourFranklin County modular building worker: $17.13 per hourKlickitat County modular building worker: $17.13 per hourClark County modular building worker: $17.13 per hourSkagit County modular building worker: $17.13 per hourWalla Walla County modular building worker: $17.13 per hourPacific County modular building worker: $17.13 per hourCowlitz County modular building worker: $17.13 per hourWahkiakum County modular building worker: $17.13 per hourLewis County modular building worker: $17.13 per hourClallam County modular building worker: $17.13 per hourGrays Harbor County modular building worker: $17.13 per hourJefferson County modular building worker: $17.13 per hourLincoln County modular building worker: $17.13 per hourMason County modular building worker: $17.13 per hourSan Juan County modular building worker: $17.13 per hourStevens County modular building worker: $17.13 per hourWhatcom County modular building worker: $17.13 per hourDouglas County modular building worker: $17.13 per hourSnohomish County modular building worker: $17.13 per hourThurston County modular building worker: $17.13 per hourColumbia County modular building worker: $17.13 per hourYakima County modular building worker: $17.13 per hourBenton County modular building worker: $17.13 per hourIsland County modular building worker: $17.13 per hourSpokane County modular building worker: $17.13 per hourWhitman County modular building worker: $17.13 per hourFerry County modular building worker: $17.13 per hourSkamania County modular building worker: $17.13 per hourAsotin County modular building worker: $17.13 per hourKitsap County modular building worker: $17.13 per hour
$17.13$17.13$17.13$17.13$17.13$17.13Modular Building Worker, main rate, total per hour. Each shade holds about a fifth of the counties.

How much does a modular building worker make on prevailing wage in Washington?

4 groups of counties with identical rates and 1 county with rates of their own, highest main rate first, each split into wage and fringe benefits on one scale. The table below lists which counties are in each group.

  1. Pierce County group27 counties · Journey Level$17.13
  2. Thurston County group5 counties · Cabinet Assembly$17.13
  3. Yakima County group4 counties · Journey Level$17.13
  4. King County group2 counties · Cabinet Assembly$17.13
  5. Snohomish County1 county · Journey Level$17.13

Which counties pay which rate

CountiesMain classificationTotalBase
Pierce County group, 27 counties: Adams, Asotin, Benton, Clallam, Clark, Columbia, Cowlitz, Ferry, Franklin, Garfield, Grant, Island, Jefferson, Klickitat, Lincoln, Okanogan, Pend Oreille, Pierce, San Juan, Skagit, Skamania, Spokane, Stevens, Wahkiakum, Walla Walla, Whatcom, WhitmanJourney Level$17.13 $8.55 
Thurston County group, 5 counties: Grays Harbor, Lewis, Mason, Pacific, ThurstonCabinet Assembly$17.13 $9.98 
Yakima County group, 4 counties: Chelan, Douglas, Kittitas, YakimaJourney Level$17.13 $14.11 
King County group, 2 counties: King, KitsapCabinet Assembly$17.13 $11.56 
Snohomish CountyJourney Level$17.13 $9.00 

4 groups of counties with identical L&I rates, and 1 county with rates of its own.

These are journey-level rates. Registered apprentices are paid L&I's apprentice rate for the trade (RCW 39.12.021), which L&I publishes in its wage lookup.

Questions about Washington modular building worker pay

What is the modular building worker prevailing wage in King County?

$17.13 an hour: a $11.56 base wage plus $5.57 in fringe benefits, under L&I period 2026-2. Overtime and every modular building worker classification in King County.

Does modular building worker prevailing wage include fringe benefits?

Yes. In King County the $17.13 total is a $11.56 base wage plus $5.57 in fringe benefits, about 33% of the total. The employer owes the full amount for every hour worked.

Do apprentice modular building workers get this rate?

Registered apprentices get L&I's apprentice rate for the trade (RCW 39.12.021), which L&I publishes in its wage lookup. Anyone else on the job is paid as a journey-level worker.

Why do some counties have the same modular building worker rate?

L&I often publishes the same modular building worker rates for several counties. Across Washington, the 39 counties with a modular building worker rate fall into 5 distinct sets of rates, and 4 of those sets are shared by more than one county; the largest covers 27 counties (the Pierce County group).