Commercial Plumbing in Hazelwood, MO
Hazelwood contracts with St. Louis County, so commercial plumbing permits run through the county. Legacy Plumbing serves Hazelwood with commercial plumbing and select residential service. In Hazelwood our commercial plumbing focus includes dental and medical tenant plumbing; our documented Dental Office project in Hazelwood included plumbing rough-in and medical gas.
Free Estimate — Hazelwood
Same-business-day response from our O'Fallon office.
Who permits plumbing work in Hazelwood
Public facts from government and utility sources, not Legacy Plumbing project claims.
- Hazelwood contracts with St. Louis County for the electrical and plumbing codes (the city runs its own building and mechanical codes), so commercial plumbing permits and inspections run through St. Louis County Transportation & Public Works. St. Louis County Transportation & Public Works
- Hazelwood's industrial base includes the ~160-acre Aviator Business Park, the ~180-acre Hazelwood Logistics Center on U.S. 67 across from Lambert, and Hazelwood Trade Port behind Park 370. City of Hazelwood
Public sources checked 2026-10-30
Commercial plumbing services in Hazelwood
Industrial plumbing
Waste, water and equipment connections for Hazelwood plants, warehouses and logistics buildings.
Explore industrial plumbingTenant build-outs
Office, retail and medical suites in Hazelwood, with permits through the county.
Explore tenant build-outsService & repair
Scheduled repairs, water heaters and drain work for Hazelwood properties, plus select residential calls.
Explore service & repairBackflow install & testing
Annual testing and assembly replacement for Hazelwood buildings.
Explore backflow install & testingScheduling commercial plumbing in Hazelwood
Hazelwood sits in St. Louis County, MO, roughly 18 straight-line miles from our O'Fallon shop; the closest towns we also serve are Florissant (about 3 mi), Bridgeton (about 3 mi) and Maryland Heights (about 5 mi). Legacy Plumbing has worked as a UA Local 562 signatory commercial plumbing contractor in St. Louis since 1996, and the St. Louis plumbing hub covers the wider area.
Licensed to pull plumbing permits in Hazelwood
For Hazelwood work, our master plumbers pull the plumbing permit through the jurisdiction covering Hazelwood in St. Louis County ourselves. Legacy Plumbing is licensed to pull plumbing permits in every St. Louis–area jurisdiction we serve: St. Louis City, St. Louis County and its municipalities, St. Charles County and Jefferson County.
Legacy Plumbing projects in and near Hazelwood
We have 1 documented project in Hazelwood itself and 6 more elsewhere in St. Louis County, covering multi-operatory dental office, outpatient dialysis clinic, middle school renovation and dental surgical center. Distances are straight-line between town centers.
- In Hazelwood
Multi-operatory dental office
Hazelwood
Medical gas, dental vacuum, backflow and water heater work for a dental practice build-out that opened on schedule for patients.
View project scope - Near Hazelwood — Florissant, ~3 mi
Outpatient dialysis clinic (2021)
Florissant
Clinic plumbing from the water room to each dialysis station box, 14 lavatories with thermostatic mixing valves, and a recirculating gas water heater.
View project scope - Near Hazelwood — St. Charles, ~6 mi
Middle school renovation
St. Charles
Interior additions and remodeling on an active school campus — ADA restroom groups, re-routed water and sanitary for classroom additions, and kitchen grease waste tie-ins, phased around the school calendar.
View project scope - Near Hazelwood — Richmond Heights, ~11 mi
Dental surgical center (2024)
Richmond Heights
Clinical plumbing with plaster traps, 12 floor drains, hub drains and cleanouts, plus a grinder lift station and sump pump.
View project scope
Documented project work in Hazelwood & nearby
Hazelwood Plumbing Questions
- What plumbing did you complete at Dental Office in Hazelwood?
- We delivered plumbing rough-in and the dental/medical gas package for the multi-operatory practice in Hazelwood, MO, including fixture coordination, backflow prevention and water heater installation.
- Who issues commercial plumbing permits in Hazelwood?
- Hazelwood contracts with St. Louis County for the electrical and plumbing codes (the city runs its own building and mechanical codes), so commercial plumbing permits and inspections run through St. Louis County Transportation & Public Works.
Nearby areas we serve
Need a Plumber in Hazelwood?
Call 636-978-0120 or request your free estimate — we respond same business day across St. Louis County.