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

There is no single figure. Active federal determinations for Delaware publish 5 plumber classification rates ranging from $8.92 to $47.73 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 Delaware have a published plumber rate?

3 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. Delaware may set its own prevailing wage rates for state and locally funded work; the state law summary is on the Delaware prevailing wage page.

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Plumber prevailing wage rates in Delaware

Federal Davis-Bacon rates published in 4 active determinations, 2026

Active federal Davis-Bacon determinations for Delaware publish 5 plumber classification rates, across 4 determinations covering 3 counties.
Those published base rates run from $8.92 to $47.73 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, Residential.
Last determination revision affecting plumber rates in Delaware: 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 Delaware'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

DE20260001 rev 1 · Residential · Kent, New Castle, Sussex

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER (NEW CASTLE COUNTY)	$9.80	0.00	SUDE1990-001 DOL wage survey rate
PLUMBER (KENT AND SUSSEX COUNTIES)	$8.92	0.00	SUDE1990-001 DOL wage survey rate

Official document: DE20260001 on SAM.gov.

DE20260007 rev 1 · Building · Kent

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$45.40	16.23	SUDE2014-004 DOL wage survey rate

Official document: DE20260007 on SAM.gov.

DE20260008 rev 1 · Building · New Castle

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$47.73	18.40	SUDE2014-005 DOL wage survey rate

Official document: DE20260008 on SAM.gov.

DE20260009 rev 1 · Building · Sussex

Classification as published	Base rate	Fringes	Rate schedule
PLUMBER	$45.40	16.23	SUDE2014-006 DOL wage survey rate

Official document: DE20260009 on SAM.gov.

Where to go next

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

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