Commercial Plumbing Contractor in St. Louis, MO
From century-old brick warehouses downtown to new medical buildings along the Grand Center corridor, St. Louis work means tying modern systems into infrastructure that has been in the ground for generations. Our crews plan around cast-iron mains, tight alleys and occupied buildings so your project keeps moving.
Legacy Plumbing has worked in the City of St. Louis and St. Louis County since 1996. Here, our work centers on commercial new construction, tenant build-outs in older downtown buildings and service and repair on aging cast-iron and galvanized systems.
Get a St. Louis Bid
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Services We Provide in St. Louis
Every scope below is self-performed by Legacy crews working in St. Louis, MO and the surrounding St. Louis City & County, MO.
New Construction in St. Louis
Commercial New Construction Plumbing
View serviceTenant Build-Out in St. Louis
Tenant Improvement Plumbing
View serviceMedical Gas in St. Louis
Medical Gas Piping
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Commercial Plumbing Service and Repair
View serviceDesign-Assist & Preconstruction in St. Louis
Design-Assist and Preconstruction Plumbing
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Licensed for St. Louis, MO Work
Work inside the City of St. Louis is permitted under a City of St. Louis plumbing license and inspected by the city's Building Division. We hold the city license and pull city permits directly — no third-party sub, no waiting on someone else's paperwork.
- Master-licensed supervision on every commercial job
- UA Local 562 signatory manpower
- Bonded and insured for commercial and industrial scopes
- Scheduled service 7am–4pm Mon–Fri
Contact Us About St. Louis
Send scope, schedule, and the job site address. We reply within one business day.
St. Louis Bid Request
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Need a Plumber in St. Louis or the Surrounding Area?
Same-day estimates, transparent pricing, and 25+ years of trusted craftsmanship across the St. Louis metro and a 2-hour radius.