Oregon's New Off-Site Fabrication Rule: Your Prefab Shop Just Became a Public Works Contractor

If you have a specialty contractor — a mechanical fab shop, a plumbing prefab operation, a structural iron fabricator — doing custom work for your public projects, pay attention. Oregon's prevailing wage law just expanded in a way that almost nobody in the industry is talking about yet. Since July 1, 2026, certain off-site fabrication work has been covered under Oregon's Prevailing Wage Rate (PWR) law. Your fabricator now has to pay prevailing wage rates, keep certified payroll records, and file a public works bond.

And here’s the thing: it's already in effect.

What Changed: HB 2688 and the New "Bespoke Fabrication" Rule

The new rule covers off-site fabrication when the work meets all four of the following conditions:

1.       Bespoke: custom-made, not a standard or stock product

2.       Performed off the project site: in a fabrication shop or secondary facility

3.       Performed specifically for, and in accordance with the specifications of, a particular covered public works project

4.       Performed on one of eight specific systems or components:

◦       Mechanical systems (HVAC, refrigeration, ducting, piping)

◦       Plumbing systems or components

◦       Electrical systems conforming with Oregon's electrical licensing standards

(ORS 479.510 to 479.945 and Electrical and Elevator Board rules)

◦       Boiler systems or components

◦       Ornamental and structural iron work

◦       Masonry and plaster systems or components

◦       Roofing, flashing, and architectural panel systems (glazing is excluded)

◦       Mechanical insulation

All four conditions must be met. If any one is absent — if the work is standard inventory, if it's not tied to a specific project's specifications, if it's on a system not in that list — the coverage doesn't apply. The workers performing covered fabrication work must be paid the applicable prevailing wage rate for the hours they spend on that project.

The Word That Does All the Work: "Bespoke"

The law turns almost entirely on whether the fabrication is bespoke: created specifically for one project. This isn't just a vocabulary choice; it's the jurisdictional trigger.

Standard ductwork pulled from stock inventory and shipped to a jobsite? Probably not covered. Custom-fabricated HVAC assemblies engineered to the dimensions and specifications of a particular public building? That's the scenario the law is aimed at.

In practice, "bespoke" is going to generate a lot of questions that don't have obvious answers. What about semi-custom work? Modular components assembled to project specs from standard parts? Pre-assembled units that are project-specific in configuration but not in materials? These edge cases are exactly the kind of thing that looks straightforward until an investigator starts asking questions.

HB 2688 directed BOLI to adopt rules before July 1, 2026 that specifically clarify which manufacturing processes and standard inventory items are excluded from the definition, and what the reporting requirements for off-site work will look like. Check with BOLI for the current status of those rules; they are where the practical line between covered and not-covered gets drawn.

Who Gets Hit by This — and How

Specialty contractors and fabrication shops: If your shop fabricates custom mechanical, plumbing, electrical, or HVAC systems for public works projects, you are now in the prevailing wage system. That means certified payroll records for the workers performing covered hours, the applicable BOLI prevailing wage rates posted for that work, and, on projects with a total project cost of $100,000 or more, a $30,000 public works bond filed with the Construction Contractors Board (CCB) before work begins. Note that the threshold is total project cost, not your contract amount. Businesses certified under ORS 200.055 as DBE, MBE, WBE, ESB, or SDVBE may elect not to file for up to four years after certification.

The operational complexity here is real. Most fab shops work on multiple projects simultaneously: some public works, some private. Your workers may spend part of a day on a covered public project and part of the day on something else entirely. Tracking, allocating, and reporting those hours correctly on certified payroll is not simple, and getting it wrong exposes both the fabricator and the general contractor ("GC") above them.

GCs: You have a new category of subcontractor to manage. If you're using a specialty fabricator for bespoke work on a public project, you need to onboard them into your compliance program: get them into your certified payroll system, verify their public works bond, and make sure your subcontract includes the required prevailing wage flow-down language. If your fab sub isn't compliant and you don't have the documentation to show you required it, the liability doesn't stay with them.

This applies to procurements solicited on or after July 1, 2026. If you're bidding new work right now, this rule applies to the contracts you're about to sign.

What You Need to Do Now

The list is short, but none of it is automatic:

GCs: Audit your subcontractor pool for specialty fabricators doing project-specific work on public contracts solicited on or after July 1, 2026. Get them into your onboarding process. Update your subcontract language to require certified payroll compliance. Don't assume your fab sub has done any of this; most haven't heard of HB 2688.

Fabricators: Talk to someone about whether your work meets the bespoke test. If it does, you need your public works bond filed with CCB, your payroll systems set up to track and report covered hours, and your rates posted at the shop for that work.

Anything solicited before July 1, 2026 is under the old rule. Anything solicited on or after it is under the new one. Know which of your projects are which.

Naylor Construction Consulting (NCC) works in Washington, where this is standard practice. Ask how we can help.

Frequently Asked Questions

Does HB 2688 apply to all off-site fabrication on Oregon public works projects? No. Only fabrication that is "bespoke," meaning custom-created for a specific project. Standard stock components or materials purchased off-the-shelf and shipped to a project are not covered.

What systems and components are covered under the new law? Eight specific categories: mechanical systems (HVAC, refrigeration, ducting, piping), plumbing, electrical systems conforming with Oregon's electrical licensing standards (ORS 479.510 to 479.945), boilers, ornamental and structural iron, masonry and plaster, roofing and architectural panels (excluding glazing), and mechanical insulation.

Are there rules clarifying what "bespoke" means and what's excluded? HB 2688 directed BOLI to adopt rules before July 1, 2026 that identify which standard inventory and manufacturing items fall outside the definition, and what the reporting requirements for off-site work will be. Check BOLI's website for the current status of those rules; they are the practical guide to where the line is.

When does HB 2688 take effect? The amendments became operative on July 1, 2026 and apply to procurements solicited on or after that date. If a contracting agency did not solicit the procurement, they apply to public contracts entered into on or after July 1, 2026.

Does a fabrication shop need to file a public works bond? On a public works project with a total project cost of $100,000 or more, yes: a $30,000 public works bond filed with the Construction Contractors Board before work begins. The requirement follows the obligation to pay prevailing wages, not the license, so it applies even if the entity doesn't have a CCB contractor's license. Businesses certified under ORS 200.055 as DBE, MBE, WBE, ESB, or SDVBE may elect not to file for up to four years after certification.

What happens if a GC's fabricator isn't compliant under HB 2688? HB 2688 didn't change who is liable; it changed what counts as covered work. Under ORS 279C.855, the fabricator that underpays is liable to those workers. What reaches the GC is SB 426, which since January 1, 2026 has made direct contractors jointly and severally liable for unpaid wages owed by subcontractors at any tier. This is exactly why documentation — subcontract language, bond verification, certified payroll review — matters before work starts, not after.

Where can I get more information on HB 2688? BOLI maintains an HB 2688 information page and takes questions at PWR.email@boli.oregon.gov. For project-specific guidance, get in touch. This is new territory, and we're already working through it with clients.

[Disclaimer: This article is intended for general informational purposes only and does not constitute legal advice. Application of HB 2688 depends on the specific facts and circumstances of each project and scope of work. Contractors should consult qualified legal counsel regarding their obligations under Oregon law.]