Plumbing · Government contracting
Plumbing Government Contracts & Bids
Last reviewed August 14, 2026 · How we source this
Public buildings need constant plumbing work — fixture and piping replacement, restroom renovations, backflow prevention, and water and sewer service connections. Plumbing contractors bid this as prime contractors on standalone projects and as subcontractors on new construction and larger renovations.
NAICS codes for plumbing contractors
- 238220 — Plumbing, Heating, and Air-Conditioning Contractors (shared with HVAC)
- 237110 — Water and Sewer Line and Related Structures Construction (utility-scale work)
Not sure which codes apply to your business? See the NAICS code definition in the glossary.
Typical government plumbing projects
- Fixture and piping replacement and restroom renovations in public buildings.
- Backflow-prevention installation, testing, and repair.
- Water and sewer service lines and connections (utility-scale work overlaps NAICS 237110).
- Plumbing systems on new public construction and major renovations, often as a subcontractor.
Where the work is
Federal plumbing work (GSA, VA, and military projects through the Army Corps of Engineers and NAVFAC) is posted on SAM.gov. State facilities agencies and universities bid building plumbing, and locally, school districts, cities, and counties are steady buyers. Utility-scale water and sewer work is often bid by public-works departments and water/sewer districts as civil projects.
You can also browse opportunities by state to see how the work is posted where you operate.
What it takes to win plumbing bids
- Plumbing shares NAICS 238220 with HVAC — make sure your codes and profile reflect the plumbing scope you self-perform.
- Plumbing licensing (master/journeyman and contractor) is required in most jurisdictions — confirm before bidding.
- Decide your role per project: prime on standalone plumbing, subcontractor on new construction.
- Prevailing wage / Davis-Bacon commonly applies — price the correct plumber rates.
- Bid, performance, and payment bonds are standard on public work.
For the full pursuit process, read How to Win Government Contracts.
Plumbing government contracting FAQ
What NAICS code do plumbing contractors use for government contracts?
What NAICS code do plumbing contractors use for government contracts?
Plumbing contractors use NAICS 238220, Plumbing, Heating, and Air-Conditioning Contractors — a code shared with HVAC. Utility-scale water and sewer line work falls under 237110. Carry the codes that match the work you self-perform.
Where are government plumbing projects posted?
Where are government plumbing projects posted?
Federal plumbing work is on SAM.gov (GSA, VA, and military projects). State facilities agencies and universities bid building plumbing, school districts, cities, and counties are steady local buyers, and utility-scale water and sewer work is bid by public-works departments and water districts.
Do I need a license for government plumbing work?
Do I need a license for government plumbing work?
Yes, in most jurisdictions. Public plumbing work requires the appropriate plumbing license (contractor, and often master/journeyman credentials for the workers). Confirm the jurisdiction's licensing before you bid — it's a common disqualifier.
Find plumbing contracts that match your business
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