Union Signatory · Since 1996
Commercial Plumbing Contractors in St. Louis
Union commercial plumbing for St. Louis GCs and facility owners.
- New construction and tenant finish
- Building service and maintenance
Credentials GCs Ask For
UA Local 562
Union signatory contractor
Master Plumbers
Missouri & Illinois licensed leadership
Bonded
$5M single / $10M aggregate
OSHA 30
Field leadership trained
Working on a bid? See what we provide on our general contractor page, or what our UA Local 562 signatory status means for your project.
Our Commercial Plumbing Services
Facility Service
Restaurants and kitchens also call us for grease trap and interceptor service, owners rely on us for multifamily plumbing, and we handle commercial plumbing in St. Charles County from our O'Fallon shop. See how we support facility and property managers.
Recent Work
Industrial / Cold Storage
Cold Storage Plumbing in Foristell
Foristell, MO
Site utilities: sanitary sewer, storm, and domestic water service; Underground plumbing rough-in coordinated with cold-storage slab pours
View project scopeHealthcare / Dental
Dental Office Plumbing in Hazelwood
Hazelwood, MO
Dental office rough-in, medical gas, dental vacuum, sterilization and lab plumbing.
View project scopeEducation
School Plumbing Renovation in St. Charles
St. Charles, MO
Restroom group renovations with ADA-compliant fixtures; Domestic water and sanitary re-routing for classroom additions
View project scopeHow We Bid
- 1
Send Plans
Send drawings, specs or a written scope for the project.
- 2
Written Scope & Bid
We review the plans and scope to prepare a written bid.
- 3
Preconstruction
Once awarded, we plan material, manpower and inspections before mobilizing.
We cover St. Louis and the surrounding counties — see all service areas.
FAQ
Commercial Plumbing Contractor — FAQs
- What does a commercial plumbing contractor handle that a residential plumber doesn't?
- Commercial plumbing contractors work from drawings and specs on new construction, tenant finish, medical gas, backflow and building systems for GCs, developers and facility owners. Legacy Plumbing is primarily commercial, with select residential service through our service division.
- Which project types do you take?
- New construction, tenant finish and build-out, design-build, plan and spec, industrial plumbing, medical gas, repiping, and facility service and repair, including water heaters, grease traps and backflow testing.
- How do I request a bid?
- Send drawings, specs or a written scope through our Contact page or call 636-978-0120. Include the bid due date and project location.
- Is Legacy Plumbing a union contractor?
- Yes — signatory with UA Local 562; certified journeymen and registered apprentices.
- What areas do you cover?
- St. Louis City and County, St. Charles, Jefferson, Franklin and Lincoln counties, and the Metro East in Illinois.
- What should I include with a bid invitation?
- Include drawings, specifications, scope, project location and the bid due date.
- How do I request plumbing service?
- Call 636-978-0120 or use Request Service to describe the building and issue. The office confirms scheduling; an online request is not a confirmed dispatch.
- Can you provide bonding and insurance certificates?
- Yes; bonded $5M single / $10M aggregate; certificates on request.
Need a Plumber in St. Louis or the Surrounding Area?
Commercial construction and building service by union plumbers, based in O'Fallon since 1996.
From Our Job Sites
