What is the Davis-Bacon prevailing wage for a plumber in Washington?

There is no single figure. Active federal determinations for Washington publish 57 plumber classification rates ranging from $25.86 to $75.21 per hour before fringe benefits. The rate that applies depends on the county, the type of construction and the wage determination incorporated into the contract.

How many counties in Washington have a published plumber rate?

39 of the counties covered by active federal determinations list at least one plumber classification.

Do these rates apply to state-funded projects?

No. These are federal Davis-Bacon rates, which apply to federally funded or assisted construction. Washington may set its own prevailing wage rates for state and locally funded work; the state law summary is on the Washington prevailing wage page.

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Plumber prevailing wage rates in Washington

Federal Davis-Bacon rates published in 57 active determinations, 2026

Active federal Davis-Bacon determinations for Washington publish 57 plumber classification rates, across 57 determinations covering 39 counties.
Those published base rates run from $25.86 to $75.21 an hour before fringe benefits. Which one applies to a job depends on its county, its construction type and the determination written into the contract.
Construction types covered: Building, Heavy, Residential.
Last determination revision affecting plumber rates in Washington: 2026-05-18.

The official source: binding Davis-Bacon and Service Contract Act wage determinations are published by the U.S. Department of Labor at SAM.gov Wage Determinations. This site indexes them and links every determination to its official document - the determination incorporated into a contract governs.

This page collects every classification in Washington's active federal determinations that is a form of plumber work (potable water, waste and gas piping) and shows the rate published for it. Determinations name a classification the way the underlying union agreement or wage survey named it, so the wording varies between them; the rate and the fringe are reproduced exactly as published.

Published rates by determination

WA20260003 rev 2 · Building · Asotin

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260003 on SAM.gov.

WA20260021 rev 2 · Building · Adams

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-001 DOL wage survey rate

Official document: WA20260021 on SAM.gov.

WA20260022 rev 1 · Building · Clallam

Classification as published	Base rate	Fringes	Rate schedule
PLUMBERS AND PIPEFITTERS	$75.21	33.88	PLUM0032-010 collectively bargained (union) rate

Official document: WA20260022 on SAM.gov.

WA20260024 rev 2 · Building · Ferry

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-004 DOL wage survey rate

Official document: WA20260024 on SAM.gov.

WA20260025 rev 2 · Building · Garfield

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-005 DOL wage survey rate

Official document: WA20260025 on SAM.gov.

WA20260026 rev 2 · Building · Grant

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-006 DOL wage survey rate

Official document: WA20260026 on SAM.gov.

WA20260030 rev 1 · Building · Kittitas

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-010 DOL wage survey rate

Official document: WA20260030 on SAM.gov.

WA20260031 rev 1 · Building · Klickitat

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-011 DOL wage survey rate

Official document: WA20260031 on SAM.gov.

WA20260032 rev 1 · Building · Lewis

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-012 DOL wage survey rate

Official document: WA20260032 on SAM.gov.

WA20260033 rev 2 · Building · Lincoln

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-013 DOL wage survey rate

Official document: WA20260033 on SAM.gov.

WA20260035 rev 2 · Building · Okanogan

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-015 DOL wage survey rate

Official document: WA20260035 on SAM.gov.

WA20260036 rev 1 · Building · Pacific

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-016 DOL wage survey rate

Official document: WA20260036 on SAM.gov.

WA20260040 rev 1 · Building · Wahkiakum

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-020 DOL wage survey rate

Official document: WA20260040 on SAM.gov.

WA20260042 rev 2 · Building · Whitman

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$35.00	0.00	SUWA2002-022 DOL wage survey rate

Official document: WA20260042 on SAM.gov.

WA20260081 rev 1 · Residential · Clallam

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$26.72	3.30	SUWA2011-001 DOL wage survey rate

Official document: WA20260081 on SAM.gov.

WA20260082 rev 1 · Residential · Grant

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$26.72	3.30	SUWA2011-002 DOL wage survey rate

Official document: WA20260082 on SAM.gov.

WA20260083 rev 1 · Residential · Adams, Kittitas, Okanogan

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$26.72	3.30	SUWA2011-003 DOL wage survey rate

Official document: WA20260083 on SAM.gov.

WA20260084 rev 1 · Residential · Ferry, Garfield, Lincoln, Whitman

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$26.72	3.30	SUWA2011-004 DOL wage survey rate

Official document: WA20260084 on SAM.gov.

WA20260085 rev 1 · Residential · Grays Harbor, Island, Jefferson, Mason, San Juan

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$26.72	3.30	SUWA2011-005 DOL wage survey rate

Official document: WA20260085 on SAM.gov.

WA20260086 rev 1 · Residential · Klickitat, Lewis, Pacific, Wahkiakum

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$26.72	3.30	SUWA2011-006 DOL wage survey rate

Official document: WA20260086 on SAM.gov.

WA20260087 rev 1 · Residential · Benton

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-007 DOL wage survey rate

Official document: WA20260087 on SAM.gov.

WA20260088 rev 1 · Residential · Chelan

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-008 DOL wage survey rate

Official document: WA20260088 on SAM.gov.

WA20260089 rev 1 · Residential · Cowlitz

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-009 DOL wage survey rate

Official document: WA20260089 on SAM.gov.

WA20260090 rev 1 · Residential · Douglas

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-010 DOL wage survey rate

Official document: WA20260090 on SAM.gov.

WA20260091 rev 1 · Residential · King

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$32.25	7.97	SUWA2011-011 DOL wage survey rate

Official document: WA20260091 on SAM.gov.

WA20260092 rev 1 · Residential · Kitsap

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$30.53	7.84	SUWA2011-012 DOL wage survey rate

Official document: WA20260092 on SAM.gov.

WA20260093 rev 1 · Residential · Pierce

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$30.53	7.84	SUWA2011-013 DOL wage survey rate

Official document: WA20260093 on SAM.gov.

WA20260094 rev 1 · Residential · Snohomish

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$30.53	7.84	SUWA2011-014 DOL wage survey rate

Official document: WA20260094 on SAM.gov.

WA20260095 rev 1 · Residential · Spokane

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-015 DOL wage survey rate

Official document: WA20260095 on SAM.gov.

WA20260096 rev 1 · Residential · Thurston

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$30.53	7.84	SUWA2011-016 DOL wage survey rate

Official document: WA20260096 on SAM.gov.

WA20260097 rev 1 · Residential · Yakima

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-017 DOL wage survey rate

Official document: WA20260097 on SAM.gov.

WA20260098 rev 1 · Residential · Asotin, Pend Oreille, Stevens

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-018 DOL wage survey rate

Official document: WA20260098 on SAM.gov.

WA20260099 rev 1 · Residential · Clark, Skamania

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-019 DOL wage survey rate

Official document: WA20260099 on SAM.gov.

WA20260100 rev 1 · Residential · Columbia, Franklin, Walla Walla

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-020 DOL wage survey rate

Official document: WA20260100 on SAM.gov.

WA20260101 rev 1 · Residential · Skagit, Whatcom

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$25.86	2.76	SUWA2011-021 DOL wage survey rate

Official document: WA20260101 on SAM.gov.

WA20260102 rev 2 · Building · Benton

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260102 on SAM.gov.

WA20260103 rev 1 · Building · Chelan

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260103 on SAM.gov.

WA20260104 rev 2 · Building · Columbia

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260104 on SAM.gov.

WA20260105 rev 1 · Building · Cowlitz

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.74	28.52	SUWA2018-005 DOL wage survey rate

Official document: WA20260105 on SAM.gov.

WA20260106 rev 1 · Building · Douglas

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260106 on SAM.gov.

WA20260107 rev 2 · Building · Franklin

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260107 on SAM.gov.

WA20260108 rev 1 · Building · King

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$75.21	33.88	PLUM0032-005 collectively bargained (union) rate

Official document: WA20260108 on SAM.gov.

WA20260109 rev 1 · Building · Kitsap

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260109 on SAM.gov.

WA20260110 rev 2 · Building · Pend Oreille

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260110 on SAM.gov.

WA20260111 rev 1 · Building · Pierce

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260111 on SAM.gov.

WA20260112 rev 1 · Building · Skagit

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260112 on SAM.gov.

WA20260113 rev 1 · Building · Snohomish

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$75.21	33.88	PLUM0032-005 collectively bargained (union) rate

Official document: WA20260113 on SAM.gov.

WA20260114 rev 2 · Building · Spokane

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260114 on SAM.gov.

WA20260115 rev 2 · Building · Stevens

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260115 on SAM.gov.

WA20260116 rev 1 · Building · Thurston

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260116 on SAM.gov.

WA20260117 rev 2 · Building · Walla Walla

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.15	27.20	PLUM0044-003 collectively bargained (union) rate

Official document: WA20260117 on SAM.gov.

WA20260118 rev 1 · Building · Whatcom

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-018 collectively bargained (union) rate

Official document: WA20260118 on SAM.gov.

WA20260119 rev 1 · Building · Yakima

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.74	28.52	SUWA2018-019 DOL wage survey rate

Official document: WA20260119 on SAM.gov.

WA20260120 rev 1 · Building · Clark, Skamania

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$42.47	19.17	SUWA2018-020 DOL wage survey rate

Official document: WA20260120 on SAM.gov.

WA20260125 rev 1 · Heavy · King

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-005 collectively bargained (union) rate

Official document: WA20260125 on SAM.gov.

WA20260127 rev 1 · Heavy · Pierce

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-005 collectively bargained (union) rate

Official document: WA20260127 on SAM.gov.

WA20260129 rev 1 · Heavy · Snohomish

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$60.72	34.15	PLUM0026-005 collectively bargained (union) rate

Official document: WA20260129 on SAM.gov.

Where to go next

Plumber rates in every state · Washington prevailing wage and state law · Washington determinations by county · pay calculator

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