New Construction Plumbing Contractor in O'Fallon, MO

Scope of Work on an O'Fallon New Build

On new construction, plumbing is a series of inspections and handoffs, so we plan by the sequence of the job:

• Underground: sanitary and storm laterals to the building, floor drains, interceptors where required, and domestic water service piping coordinated with the site contractor (underground and site utilities)
• Slab and below-grade rough-in: under-slab piping, trench drains, sleeves and stubs set to the architectural and structural drawings
• Overhead and in-wall rough-in: waste, vent, storm and supply piping, restroom carriers, and coordination with mechanical, electrical and fire protection above the ceiling
• Set and trim: fixtures, water heaters, drinking fountains, hose bibs, floor sinks and the items on the plumbing schedule
• Backflow, testing and closeout: backflow assemblies, pressure and flow testing, and inspection sign-off (backflow prevention)
• Specialty systems where the project needs them, including medical gas

Building Types

Warehouse and light industrial, restaurant and food service, office and tenant finish, multifamily, healthcare and dental (healthcare, dental), and education.

How We Bid and Deliver

• Bid-spec: send plans and specs and we deliver a line-item proposal with clear inclusions, exclusions and alternates (bid-spec plumbing)
• Design-build and design-assist: we help work out riser layouts, fixture counts and routing early, when changes are cheap (design-build, design-assist preconstruction)
• Coordination: we raise conflicts at coordination, not on site, because late changes cost the GC the most.

Local Conditions and Permitting in O'Fallon

Based on City of O'Fallon published information (always confirm current requirements before bid):

• The Building Division performs plan review and inspections. The City states that commercial permits are required for any new commercial project, including alterations or additions.
• Plumbing work requires a permit, and inspections are scheduled through the City's CitizenServe portal.
• The City's adopted ICC codes, including local amendments, can be viewed at codes.iccsafe.org. Confirm the adopted plumbing code edition with the Building Division for your permit set.
• Grading, driveways and excavation permits run through the Engineering Department, and stormwater facilities require a maintenance agreement.
• Public Works maintains the City's water mains and sewer lines, so tap and tie-in timing should be coordinated early.

Why Legacy

• Local office and crews in O'Fallon.
• Underground, rough-in, trim and backflow handled by one plumbing contractor, so one party is responsible for tests and sign-offs.
• We stay on after turnover through service agreements and commercial service.

Service Area

O'Fallon plus St. Peters, St. Charles, Wentzville, Lake Saint Louis, Dardenne Prairie, Cottleville and the rest of St. Charles County.

Request a Bid

Send drawings and your bid date through our contact page or see bid-spec plumbing. General contractors: see our page for general contractors.