Commercial Plumbing in Warrenton, MO
Warrenton enforces the 2015 International Plumbing Code through its own building department. Legacy Plumbing serves Warrenton with commercial plumbing and select residential service. In Warrenton, the Warren County seat, we typically handle plumbing for the I-70 industrial parks.
Free Estimate — Warrenton
Same-business-day response from our O'Fallon office.
Water, sewer & site infrastructure in Warrenton
Public facts from government and utility sources, not Legacy Plumbing project claims.
- The city's construction guide requires solder with no more than 0.2% lead on all copper water-supply piping. City of Warrenton
- The City of Warrenton Building Department (Building Commissioner) issues permits at City Hall; water is the city's Water Department. City of Warrenton
- Warrenton has adopted the 2015 International Plumbing Code. City of Warrenton code
- Warrenton, incorporated in 1864, is the Warren County seat. Missouri Secretary of State
Public sources checked 2026-10-30
Getting crews and materials to Warrenton
Warrenton sits in Warren County, MO, roughly 24 straight-line miles from our O'Fallon shop; the closest towns we also serve are Truesdale (about 1 mi), Innsbrook (about 6 mi) and Wright City (about 7 mi). Legacy Plumbing has worked as a UA Local 562 signatory commercial plumbing contractor in St. Louis since 1996.
Licensed to pull plumbing permits in Warrenton
Legacy Plumbing has master plumbers on staff and holds the licensing to pull plumbing permits in the jurisdiction covering Warrenton in Warren County, as in every other St. Louis–area jurisdiction we serve — St. Louis City, St. Louis County and its municipalities, St. Charles County and Jefferson County.
Site, water and service plumbing for Warrenton
Underground & site utilities
Sanitary, storm and water service connections for new Warrenton sites.
Explore underground & site utilitiesBackflow install & testing
Annual backflow testing, with reports sent to Warrenton's water provider.
Explore backflow install & testingService & repair
Scheduled repairs, water heaters and drain work for Warrenton properties, plus select residential calls.
Explore service & repairTenant build-outs
Suite plumbing for new tenants in Warrenton.
Explore tenant build-outsLegacy Plumbing projects in and near Warrenton
Our closest documented work to Warrenton is in Foristell, within about 10 straight-line miles — cold storage distribution center and dental practice expansion. Distances are straight-line between town centers.
- Near Warrenton — Foristell, ~10 mi
Cold storage distribution center
Foristell
New industrial building where we ran site utilities and underground rough-in around cold-storage slab pours, then set floor drains, backflow and water heating on a fast-track schedule.
View project scope - Nearest recent project — Wentzville, ~15 mi
Dental practice expansion (2020)
Wentzville
Five new treatment rooms with nitrous oxide, oxygen, air and vacuum, a sterilization area and an ADA restroom rework in an operating practice.
View project scope
Warrenton Plumbing Questions
- Who issues commercial plumbing permits in Warrenton?
- The City of Warrenton Building Department (Building Commissioner) issues permits at City Hall; water is the city's Water Department.
Nearby areas we serve
Need a Plumber in Warrenton?
Call 636-978-0120 or request your free estimate — we respond same business day across Warren County.