# Tenant Finish Plumbing Contractor | St. Louis | Legacy > Tenant finish plumbing for St. Louis office, retail, restaurant and medical suites: existing-system review, rough-in, fixtures and GC coordination. Request Canonical: https://legacyplumbingmo.com/commercial/tenant-finish Last updated: 2026-10-29 Tenant Improvement Tenant finish plumbing connects a commercial shell or existing suite to the fixtures and equipment needed by its new tenant. Legacy Plumbing handles existing-system review, rough-in, fixture installation and permit coordination across St. Louis, St. Charles and Jefferson County. Request a Bid [636-978-0120](tel:+16369780120) ## Price My Build-Out Send plans, scope and your proposed schedule. Who We Serve ## Tenant Build-Outs for Office, Retail & Medical Suites - Dental and medical suites - Office suites and corporate floors - Light industrial and flex space - Retail and service tenants - Veterinary and outpatient clinics - Property managers turning vacant suites ### Explore More - [Service & Repair](https://legacyplumbingmo.com/services/service-repair) - [New Construction](https://legacyplumbingmo.com/services/new-construction) - [Plumbing in St. Charles, MO](https://legacyplumbingmo.com/locations/st-charles) - [All Commercial Services](https://legacyplumbingmo.com/commercial) Scope ## What Tenant Finish Plumbing Includes Tenant finish work connects a new layout to a building that is already standing. We field-verify what is there, then build only what the suite needs. ### Tie-Ins to Existing Risers New waste, vent and domestic water branches connected to the building's existing risers and mains. ### Restrooms & ADA Fixtures Restroom groups and accessible fixtures laid out and set for the suite's occupancy. ### Break Rooms Sinks, dishwasher and ice-maker connections, and water heaters for staff break areas. ### Medical Gas Med gas piping for dental and medical suites, installed by ASSE 6010 certified brazers. ### Restaurant Grease Interceptors Grease interceptors and kitchen waste for restaurant tenant finish, ready for scheduled cleaning. Occupied Buildings ## Coordinating Tenant Build-Out Plumbing in Occupied Buildings Most build-outs happen next to tenants who need water and drains all day. We plan the disruptive steps before a valve turns. ### Shutdown Planning Water shutdowns are noticed, scheduled and communicated to the building engineer in advance. ### Core Drilling Core drilling and selective demo scheduled around tenant hours where the building requires it. ### Trade Coordination Rough-in sequenced with the GC and other trades so the suite stays on its turnover date. [Grease trap cleaning & interceptor service](https://legacyplumbingmo.com/facility-services/grease-trap-cleaning) ## Match the plumbing scope to the tenant A restaurant fit-out combines kitchen drainage, grease interception, equipment connections and water heating. Retail and office suites commonly focus on restroom groups, accessible fixtures and break-room connections. Medical and dental spaces add clinical sinks, sterilization and equipment rough-in; medical gas belongs in the scope when specified, not in every office build-out. Verify fixture locations and retained risers before treating these uses as interchangeable. Coordinate submittals, shutdowns and inspections with the GC and building engineer. Inspect concealed piping before finishes close. Send the tenant type, plans link, bid due date, equipment information and schedule. Project proof shows actual scopes, not a standard duration or promised turnover date for a different suite. - [Working with general contractors](https://legacyplumbingmo.com/general-contractors) - [Permits and inspections](https://legacyplumbingmo.com/resources/commercial-plumbing-permits-st-louis-st-charles) - [Request a Bid](https://legacyplumbingmo.com/contact-us) Our Process ## Tenant Improvement Plumbing: Rough-In, Fixtures & Inspections ### Walk the Suite We field-verify existing waste, water and gas before pricing so surprises stay out of the change order log. ### Permit & Coordinate Plans submitted to the local jurisdiction and sequenced with the building engineer and other trades. ### Demo & Rough-In Selective demo, core drilling and rough-in scheduled around tenant hours where the building requires it. ### Trim & Inspection Fixtures set, tested and inspected so the tenant can take occupancy on the promised date. Project Proof ## Tenant Finish & Build-Out Projects Healthcare / Dental ### Dental Office Plumbing in Hazelwood Hazelwood, MO Dental office rough-in, medical gas, dental vacuum, sterilization and lab plumbing. View project scope Restaurant / Food Service ### Restaurant Plumbing in Crestwood Crestwood, St. Louis County Pizza restaurant interior plumbing with kitchen drainage, solids and grease interceptors, water heating and restroom fixtures. View project scope Healthcare / Dental ### Dental Plumbing in Webster Groves Webster Groves, St. Louis County Dental vacuum and compressed air, fixture connections and existing-system tie-ins in an occupied multi-tenant building. View project scope Healthcare / Dental ### Dental Surgery Plumbing in Richmond Heights Richmond Heights, St. Louis County Dental surgical center interior plumbing with clinical sinks, accessible fixtures, grinder lift station, tankless water heating and RPZ. View project scope [View all projects](https://legacyplumbingmo.com/projects) FAQ ## Tenant Finish Plumbing — FAQs - **What is tenant finish plumbing?:** Tenant finish plumbing, also called tenant build-out or tenant improvement plumbing, is the plumbing installed when an existing commercial shell or suite is fitted out for a specific tenant. - **What's included in a tenant build-out plumbing scope?:** Tie-ins to the building's existing risers, restroom and ADA fixtures, break rooms, and, where the tenant needs them, medical gas and restaurant grease interceptors, followed by testing and inspection. - **Do you work with general contractors on tenant finish projects?:** Yes. We sequence rough-in with the general contractor and other trades so the suite stays on its turnover date, with one point of contact from pricing through final inspection. - **What areas do you serve?:** The St. Louis metro, St. Charles County, Jefferson County and roughly a 2-hour radius of O'Fallon, MO. - **Can you work in an occupied building?:** Yes. We plan shutdowns in advance, coordinate with the building engineer and schedule disruptive work like core drilling around tenant hours. - **Do you handle tenant finish permits and inspections?:** Yes. We submit the plumbing plans to the local jurisdiction and coordinate inspection stages with the GC and building engineer before concealed work is covered and fixtures are turned over. Need site utilities, excavation or earthwork? We refer site work to [Kuesel Excavating](https://kueselinc.com/) . ## Request a Tenant Build-Out Bid Send plans, scope, bid due date and construction schedule. ## Price My Build-Out Send plans, scope and your proposed schedule. For examples of this work, see [Retail Plumbing in South St. Louis County (St. Louis, South St. Louis County)](https://legacyplumbingmo.com/projects/retail-building-plumbing-south-st-louis-county) , [Dental Office Renovation in St. Louis (St. Louis, City of St. Louis)](https://legacyplumbingmo.com/projects/dental-office-renovation-st-louis-city) and [Plant Cafeteria Plumbing in St. Louis (St. Louis, City of St. Louis)](https://legacyplumbingmo.com/projects/pharmaceutical-plant-cafeteria-renovation-st-louis) . For planning guidance, read [Tenant Build-Out Plumbing Timeline: What to Expect](https://legacyplumbingmo.com/resources/tenant-build-out-plumbing-timeline) . ### Related Services - [ADA Restroom Retrofits](https://legacyplumbingmo.com/facility-services/ada-retrofits) - [Medical Gas Piping](https://legacyplumbingmo.com/services/medical-gas) - [Grease Trap Cleaning](https://legacyplumbingmo.com/facility-services/grease-trap-cleaning) - [For General Contractors](https://legacyplumbingmo.com/general-contractors) ### Next Steps - [Request Service](https://legacyplumbingmo.com/request-service) - [View All Commercial Services](https://legacyplumbingmo.com/commercial) - [Request a Free Estimate](https://legacyplumbingmo.com/contact-us) ## Where we work ### St. Charles County - [Commercial plumbing in St. Charles County](https://legacyplumbingmo.com/locations/st-charles-county) - [Commercial plumbing in O'Fallon](https://legacyplumbingmo.com/locations/ofallon) - [Commercial plumbing in St. Peters](https://legacyplumbingmo.com/locations/st-peters) - [Commercial plumbing in St. Charles](https://legacyplumbingmo.com/locations/st-charles) - [Commercial plumbing in Wentzville](https://legacyplumbingmo.com/locations/wentzville) - [Commercial plumbing in Lake Saint Louis](https://legacyplumbingmo.com/service-area/lake-st-louis-mo) - [Commercial plumbing in Dardenne Prairie](https://legacyplumbingmo.com/service-area/dardenne-prairie-mo) - [Commercial plumbing in Cottleville](https://legacyplumbingmo.com/service-area/cottleville-mo) ### Lincoln County - [Commercial plumbing in Troy](https://legacyplumbingmo.com/service-area/troy-mo) - [Commercial plumbing in Moscow Mills](https://legacyplumbingmo.com/service-area/moscow-mills-mo) - [Commercial plumbing in Elsberry](https://legacyplumbingmo.com/service-area/elsberry-mo) ### Warren County - [Commercial plumbing in Warrenton](https://legacyplumbingmo.com/service-area/warrenton-mo) - [Commercial plumbing in Wright City](https://legacyplumbingmo.com/service-area/wright-city-mo) - [Commercial plumbing in Marthasville](https://legacyplumbingmo.com/service-area/marthasville-mo) ### St. Louis County - [Commercial plumbing in Chesterfield](https://legacyplumbingmo.com/locations/chesterfield) - [Commercial plumbing in Clayton](https://legacyplumbingmo.com/locations/clayton) - [Commercial plumbing in Affton](https://legacyplumbingmo.com/service-area/affton-mo) - [Commercial plumbing in Ladue](https://legacyplumbingmo.com/service-area/ladue-mo) - [Commercial plumbing in Brentwood](https://legacyplumbingmo.com/service-area/brentwood-mo) ### Jefferson County - [Commercial plumbing in Jefferson County](https://legacyplumbingmo.com/locations/jefferson-county) - [Commercial plumbing in Arnold](https://legacyplumbingmo.com/service-area/arnold-mo) - [Commercial plumbing in Festus](https://legacyplumbingmo.com/service-area/festus-mo) - [Commercial plumbing in Crystal City](https://legacyplumbingmo.com/service-area/crystal-city-mo) ### St. Louis City - [Commercial plumbing in St. Louis](https://legacyplumbingmo.com/locations/st-louis) - [Commercial plumbing in Central West End](https://legacyplumbingmo.com/service-area/central-west-end-mo) - [Commercial plumbing in Compton Heights](https://legacyplumbingmo.com/service-area/compton-heights-mo) - [Commercial plumbing in Lafayette Square](https://legacyplumbingmo.com/service-area/lafayette-square-mo) [All commercial plumbing service areas by county](https://legacyplumbingmo.com/service-areas) ## Need a Plumber in St. Louis or the Surrounding Area? Request a Bid for tenant finish plumbing. Regular office hours are Monday–Friday, 7am–4pm. [Get Free Estimate](https://legacyplumbingmo.com/contact-us) [636-978-0120](tel:+16369780120) ## From Our Job Sites Copper water risers in a commercial build-out Copper supply rough-in in metal stud framing In-wall water supply rough-in New drain line in a saw-cut slab trench during a renovation New pipe in a slab trench during an interior renovation ## Related - [Contact Legacy Plumbing](https://legacyplumbingmo.com/contact-us) - [Company facts](https://legacyplumbingmo.com/company-facts) - [All pages (llms.txt)](https://legacyplumbingmo.com/llms.txt)