What is a Project Labor Agreement (PLA)?
A project labor agreement (PLA) is a pre-hire collective bargaining agreement that sets the wages, benefits, work rules, safety standards and dispute procedures for one specific construction project before any contractor bids on the work. Every contractor and subcontractor that wins work on the job, union or non-union, follows the same terms for the life of the project.
PLAs have governed major American construction for nearly a century, from the Hoover Dam to today’s transit lines, schools, ports, semiconductor plants and data centers. This guide explains what the PLA acronym means, what the agreements cover, how they work from bid to closeout, where they are required, and what the peer-reviewed research says.
What does PLA stand for?
PLA stands for project labor agreement. In construction and public policy the acronym almost always refers to this pre-hire contract, not to polylactic acid, programmable logic arrays or any other use of the letters.
The definition breaks down term by term:
Pre-hire means the agreement is negotiated before workers are hired. Federal labor law carves out this exception for construction, an industry where workforces assemble project by project.
Collective bargaining agreement means it is a binding labor contract negotiated between the project owner (or its construction manager) and one or more building trades unions, usually a regional building trades council representing all crafts at once.
Project-specific means it applies to one job, binds every contractor and subcontractor that wins work on that job, and ends when the work is done. Each agreement is negotiated fresh; there is no single national template.
Think of a PLA as the project’s operating manual for labor relations. Every bidder sees the same labor terms before submitting a price, so competition turns on skill, management and efficiency rather than a race to cut pay.
What a project labor agreement covers
Exact terms vary by project and by the parties signing, but most PLAs are built around the same practical items that matter on large, multi-trade jobs. The full list of PLA requirements covers what an agreement must include.
How a project labor agreement works, from bid to closeout
The lifecycle of a PLA on a public construction project.
PLA vs prevailing wage, CBA and community workforce agreements
These terms overlap in public debate but describe different things. Keeping them straight resolves most of the confusion around project labor agreements.
| Term | What it is | Scope | How it relates to a PLA |
|---|---|---|---|
| Project labor agreement (PLA) | Negotiated pre-hire labor contract | One construction project | The subject of this page. Can include wage standards plus work rules, dispute procedures and labor peace terms. |
| Prevailing wage | Statutory minimum wage and benefit rate (Davis-Bacon and state equivalents) | All covered public work, agreement or not | A PLA typically meets or exceeds prevailing wage and adds site rules the statute does not address. |
| Collective bargaining agreement (CBA) | Ongoing contract between an employer and a union | An employer’s workforce across many jobs and years | A PLA is project-specific and binds every contractor on the site, including non-union firms. |
| Community workforce agreement (CWA) | A PLA with added community commitments | One project, plus targeted hiring goals | Adds local hire, veteran, women and underserved-community pathways on top of the standard PLA framework. |
Read the full comparison: PLA vs collective bargaining agreement.
Where project labor agreements are used and required
PLAs operate at every level of construction. Federal agencies use them on courthouses, military construction and veterans hospitals under FAR subpart 22.5, and the Federal Highway Administration publishes guidance for PLAs on highway work. State and local governments use them on schools, airports, water systems, ports and transit. Private owners use them on stadiums, semiconductor plants, offshore wind farms and data centers, where a missed schedule costs far more than the labor on it.
Threshold questions resolve state by state. The table below covers the jurisdictions this site tracks most closely.
| Jurisdiction | Rule | Threshold or scope | Learn more |
|---|---|---|---|
| Federal | Executive Order 14063 and FAR rules direct agencies to require PLAs on large-scale federal construction unless an exception applies | $35 million and up | Are PLAs required on federal projects? |
| New Jersey | State law authorizes PLAs on public works; several counties have lowered their own thresholds | $5 million statewide; $3 million in Union County, with Passaic County moving to match | NJ county thresholds |
| Pennsylvania | No statewide mandate; used at agency and local discretion, including a Philadelphia executive order, and named as the workforce standard under the state’s data center GRID requirements | Project by project | PA data center PLAs |
| Maryland | Executive Order 01.01.2023.19 directs PLAs on large state capital projects | $20 million and up | Maryland PLA news |
| Delaware | SB 241 would require PLAs on large school construction; the Port of Wilmington Edgemoor expansion is already built under a PLA | Pending legislation; project by project today | Delaware port PLA |
| Virginia | A 2020 law, effective 2021, allows localities to require PLAs on public works; Loudoun County is piloting them | Local option | Loudoun County pilot |
| West Virginia | A 2015 law prohibits PLA requirements on public projects; private owners may still use them | Public: prohibited. Private: allowed | West Virginia guide |
| Washington, DC | PLAs used on District-funded construction | Project by project | Washington, DC guide |
Thresholds change as legislation moves. Confirm the current statute or executive order before relying on a figure for a specific project.
State guides: New Jersey · Pennsylvania · Delaware · Maryland · Virginia · West Virginia · Washington, DC
A short history of project labor agreements
PLAs are nearly a century old. They governed construction of the Hoover Dam in the 1930s and the Trans-Alaska Pipeline in the 1970s, and the Tennessee Valley Authority has built under a master PLA since 1991. Federal policy formalized their use with Executive Order 14063 in 2022, which directs agencies to require PLAs on federal construction of $35 million or more.
Recent years have widened the map. Offshore wind, semiconductor plants and data centers have all broken ground under PLAs as private owners with unforgiving schedules borrow a tool long proven on public work. In the Eastern Atlantic states, 42,000 union carpenters build under these agreements alongside the other trades.
Are project labor agreements legal?
Yes. Federal labor law expressly authorizes pre-hire agreements in the construction industry, an exception written into the National Labor Relations Act (Section 8(f)) for an industry where workforces assemble project by project. In 1993 the U.S. Supreme Court upheld the use of PLAs on public projects in the Boston Harbor case (507 U.S. 218), confirming that public owners may require them just as private owners do. States and localities authorize them by statute, executive order or local ordinance.
Should your project use a PLA?
A PLA decision should rest on verified project evidence, not on the loudest voice in the council chamber. Owners who answer these questions first tend to land on the right structure.
Several yes answers point toward a PLA. See project labor agreement requirements for what the agreement itself must include, the PLA report guide for what owners and taxpayers should expect during the job, and the checklist for public officials for how governments decide.
Project labor agreement FAQ
Quick answers to the questions public officials, contractors, workers and reporters ask most.
