New Construction Plumbing Contractor Serving St. Louis, St. Charles & Jefferson County
Legacy Plumbing has installed commercial plumbing systems for new-build projects across the St. Louis metro since 1996. Our master-licensed team handles everything from underground rough-in through final fixture trim-out, on schedule and on budget.
Bid My New Construction Project
Tell us about your project — we respond within one business day.
Who We Serve on Ground-Up Work
- Industrial and manufacturing facilities
- Warehouse, distribution and cold storage
- Medical office buildings and clinics
- Schools and municipal buildings
- Mid-size commercial shells and retail centers
- General contractors bidding plan-and-spec work
For ground-up projects that also need site work and underground utilities, Kuesel, our sister company under Kuesel Holding Company, handles the earthwork and water and sewer site utilities.
How a New Construction Job Runs
Takeoff & Hard Bid
We price off your plans and specs, flag scope gaps, and return a written number your estimator can rely on.
Underground Rough-In
Sanitary, storm and water service set and tested before the slab pour, coordinated with the site contractor.
Above-Ground Rough
Waste, vent, domestic water and gas run tight to the model so other trades keep moving.
Trim & Fixture Set
Fixtures, carriers, water heaters and specialties installed and protected for turnover.
Test, Inspect, Close Out
Pressure tests, chlorination, inspector walk and O&M documents delivered with the punch list clear.
Why Choose Legacy for New Construction
Why Contractors Hand Us the Plumbing Scope
A commercial contractor since 1996
We are primarily a commercial contractor, with select residential service through our service division. Every crew we field has built commercial and industrial systems.
Master-licensed across the metro
Licensed in St. Louis City, St. Louis County, St. Charles County and Jefferson County jurisdictions.
Manpower that holds the schedule
UA Local 562 manpower means we can add bodies when the GC compresses the schedule instead of asking for more float.
Written pre-job planning
Every job starts with a written plan so material, manpower and inspections are sequenced before day one.
Need site utilities, excavation or earthwork? Work with our sister company Kuesel, under Kuesel Holding Company.
Request a New Construction Bid
Send scope, schedule and site address. We reply within one business day.
Bid My New Construction Project
Tell us about your project — we respond within one business day.
For examples of this work, see Ground-Up Site Utilities (O'Fallon, MO), Cold Storage Facility in Foristell (Foristell, MO) and Middle School Renovation in St. Charles (St. Charles, MO). For planning guidance, read Underground Plumbing Before the Slab: A Commercial Coordination and Inspection Checklist and How Prefabricated Plumbing Assemblies Shorten Schedules on Multifamily, Hotel, Healthcare and School Projects.
Where we work
St. Charles County
Lincoln County
Warren County
St. Louis County
Jefferson County
Need a Plumber in St. Louis or the Surrounding Area?
Written bids within one business day, scheduled service Monday–Friday 7am–4pm (emergency calls answered 24/7 — nights & weekends billed at premium rates), and union-trained crews since 1996 across the St. Louis metro and a 2-hour radius.
From Our Job Sites
