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Public Works Contracts

This page provides a brief overview of traditional public works contracting for local governments in Washington State, including definitions of public works and ordinary maintenance, apprentice utilization requirements, and links to a wide range of public works topics.

It is part of MRSC's series on Purchasing and Contracting.

Digging Into Public Works: Through June 2025, MRSC is continuing our partnership with APEX Accelerator for our "Digging Into Public Works" project, an initiative to connect, educate, and engage local government staff and private contractors in the field of public works.

For more detailed information on public works bidding and contracting, download MRSC's City Bidding Book or County Bidding Book. Although these publications are geared toward cities and counties, much of the information is also applicable to special purpose districts.

Traditional Design-Bid-Build Contracting

These pages discuss only the "traditional" design-bid-build public works process, and not the alternative project delivery methods of Chapter 39.10 RCW.

In the traditional project delivery method, which all public agencies in the state are allowed or required to use, an engineer/architect designs the project, then the agency uses a competitive process to bid the project and make an award to a contractor, who constructs the project using plans and specifications prepared by the engineer/architect.

What Is a Public Work?

RCW 39.04.010(4) defines "public work" as:

[A]ll work, construction, alteration, repair, or improvement other than ordinary maintenance, executed at the cost of the state or of any municipality, or which is by law a lien or charge on any property therein. … "Public work" does not include work, construction, alteration, repair, or improvement performed under contracts entered into under RCW 36.102.060(4) or under development agreements entered into under RCW 36.102.060(7) or leases entered into under RCW 36.102.060(8).

This applies to all municipalities as defined in RCW 39.04.010(3) – essentially all public agencies except the various types of diking, drainage, or irrigation districts, or any other district authorized for the reclamation or development of waste or undeveloped lands.

Examples of public works projects include road construction, roof repair, HVAC upgrades, building remodeling, or parking meter installation.

What Is "Ordinary Maintenance"?

WAC 296-127-010(7)(b)(ii) defines "ordinary maintenance" as "maintenance work performed by the regular employees of the state or any county, municipality, or political subdivision created by its laws." This definition applies to the state prevailing wage law, chapter 39.12 RCW.

But what about procurement of ordinary maintenance and chapter 39.04 RCW? The RCW 39.04.010(4) definition of "public work" specifically excludes "ordinary maintenance." Unfortunately, "ordinary maintenance" is not defined in this statute.

The exclusion of "ordinary maintenance" from the definition of "public work" in chapter 39.04 RCW can be read to exclude ordinary maintenance from the public works competitive procurement processes in that chapter.

Contracted maintenance requires prevailing wages. RCW 39.04.010(4) states: "All public works, including maintenance when performed by contract shall comply with chapter 39.12 RCW." That means the prevailing wage requirements that would normally apply are still applicable even though the maintenance work might not be procured as a public work.

Some case law looked at whether prevailing wages applied to contracted maintenance or ordinary maintenance. In Spokane v. Department of Labor and Industries (2000), the state court of appeals concluded that maintenance, when performed by contract, is "public work" subject to prevailing wage law.

The prevailing wage law's administrative rules use a broader definition of "public work" than the definition in RCW 39.04.010(4). See WAC 296-127-010(7). Arguably, the Spokane case was looking at that broader prevailing wage definition and not at the more limited definition in the procurement statute, chapter 39.04 RCW. So, the Spokane case is useful for whether prevailing wage law applies but arguably not instructive on whether the competitive procurement process in chapter 39.04 RCW is applicable.

So, must ordinary maintenance performed by contract conform to bid limits, contract bonds, and contract retainage?

Bid Limits

This will require studying your agency's various enabling statutes for competitive procurement requirements and applicable contract bid limits. If the contracted maintenance work is a purchased service, it is possible that the agency's own procurement policy will control the process.

Agencies can review their statutory requirements at Find Your Contracting Requirements. A careful look at the wording of those statutes will be necessary to determine any applicable bid limits, and we recommend you discuss your process and procedures on this matter with your legal counsel.

Contract Bond

RCW 39.08.010 requires a contract bond on state or local government contracts with any person or corporation to perform any work. That is a broad requirement that applies to contracted ordinary maintenance. RCW 39.08.015 places liability on the public entity when the entity fails to obtain the required contract bond. RCW 39.08.010(3) provides a possible exception to requiring the contract bond:

On contracts of one hundred fifty thousand dollars or less, at the option of the contractor or the general contractor/construction manager as defined in RCW 39.10.210, the respective public entity may, in lieu of the bond, retain ten percent of the contract amount for a period of thirty days after date of final acceptance, or until receipt of all necessary releases from the department of revenue, the employment security department, and the department of labor and industries and settlement of any liens filed under chapter 60.28 RCW, whichever is later. The recovery of unpaid wages and benefits must be the first priority for any actions filed against retainage held by a state agency or authorized local government.

Contract Retainage

Chapter 60.28 RCW requires contract retainage on "public improvement contracts" unless the contract is for a federally funded transportation project. Often, contracted maintenance will not involve making any "public improvement." If so, there is arguably no requirement for any contract retainage on a maintenance contract.

Competitive Bidding

Chapter 39.04 RCW requires competitive bidding for public works projects, although it does not establish bid limits or required competitive processes, and RCW 39.04.280 exempts municipalities from other competitive bidding including emergency public works projects.

The exact public works bidding requirements vary from agency to agency. Many local governments have their own unique bid limits, competitive processes, and even exemptions in their statutes, and many are able to use a small works roster process for projects under $350,000.

Most public works projects require prevailing wages, retainage, and performance and payment bonds.

To see your agency's statutory competitive bidding requirements, use MRSC's Find Your Contracting Requirements tool.

Apprenticeship Requirements

New legislation: HB 1050, adopted in 2023, will significantly expand apprenticeship utilization requirements in 2024, 2026, and 2028. As part of this effort, MRSC and L&I are collaborating with multiple agency partners to provide agency specific workshops focused on this new piece of legislation. The current workshop locations and registration information is located in the "Agency Specific Workshops For Local Government Public Works Staff" section on the Digging Into Public Works webpage.

More details on the legislation are included below; also see our blog post 2023 Legislative Session Outcomes for Procurement and Contracting, Part 1.

Historically, most local governments in Washington have not been required to include apprentice utilization requirements in their public works contracts. Though the apprentice utilization requirements of RCW 39.04.320 only applied to school districts, four-year institutions of higher education, and certain state agencies, some local governments chose to include specific apprentice utilization requirements by policy.

However, beginning on July 1, 2024, all municipalities – defined in RCW 39.04.010 as cities, counties, port districts, and any other public agency authorized by law to require the execution of public work (excluding various diking/drainage/irrigation districts) – will be subject to new requirements.

At that time, apprentices must perform 15% or more of the total labor hours in public works contracts estimated at $2 million or more.

In subsequent years, apprenticeship utilization requirements will change twice more. On July 1, 2026, contracts over $1.5 million must follow these regulations; in 2028, contracts over $1 million are also included.

If existing local laws or ordinances are more favorable to apprentices than the minimum requirements under state law, the more favorable local laws still apply and may be enforced.

Below are selected examples of local apprenticeship utilization requirements; note than they were developed before the passage of HB 1050 and may not meet legislative requirements after July 1, 2024.

  • Burien Municipal Code Ch. 2.80 – At least 15% of labor hours must be performed by apprentices for public work projects over $1 million. Includes schedule of fines for every unmet hour.
  • Edmonds Municipal Code Sec. 18.00.050 – Public works director or designee may require up to 15% of labor hours to be performed by apprentices for public works contracts of $1 million or more. Failure to meet requirements is considered a breach of contract and may affect contractors' qualification for future contracts.
  • Hoquiam Municipal Code Ch. 1.59 – At least 10% of labor hours must be performed by apprentices for public works in which the cost of labor, excluding materials, is estimated at $100,000 or more; includes provisions for emergencies and waivers.
  • King County Apprenticeship Program – Establishes apprenticeship requirements on selected public works projects based on the scope of work and total anticipated labor hours; includes required apprentice utilization forms and other resources.
  • Port Angeles Municipal Code Sec. 3.80 – At least 15% of labor hours must be performed by apprentices for public works over $1 million, except for emergencies or waivers.
  • Shoreline Ordinance No. 1016 (2024) – Updates several sections of procurement code to reflect recent changes to state law, including the statewide small works roster and apprenticeship utilization requirements
  • Tacoma Local Employment and Apprenticeship Training Program (LEAP) – At least 15% of labor hours must be performed by apprentices for civil or building projects over $1 million, as well as certain service contracts related to public works; also includes local employment requirements; also see LEAP Forms for required documentation.

Public Works Topics

For more information about public works contracting in Washington, see the topics below:


Last Modified: August 01, 2024