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Cregger Plumbing, Heating & Cooling
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Highest average public rating among plumbers on Rebuild Detroit.
Metro Detroit • 437 plumbers profiles
Commercial Plumbing in Metro Detroit
Compare verified commercial plumbers for service, tenant build-outs and backflow testing. Get free quotes, check licenses, and hire with confidence.
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437Plumbers profiles
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Featured commercial plumbing pros
Top Commercial Plumbing Pros in Metro Detroit
Featured spots are paid placements shown first. The Verified badge records dated checks; other listed businesses have not been verified yet. Confirm current licensing, insurance and written scope with each provider.
H2O Plumbing, Sewer and Drain
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Jermor Plumbing
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On My Way Plumbing & Drain Services
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Schaefer Plumbing
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SL Plumbing
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Before you hire
Commercial plumbing in Detroit: what to expect
Commercial plumbing in Detroit ranges from downtown and Midtown storefronts to plants and apartment buildings in Southfield, Troy and Sterling Heights. Commercial plumbing covers offices, retail, restaurants, apartment buildings, churches, schools and light industrial space. Common calls are backed-up main lines, grease-clogged kitchen drains, water heater and booster pump service, restroom fixture repairs, and backflow preventer testing. Planned work includes tenant build-outs, restroom upgrades and new restaurant kitchens.
Commercial jobs add requirements homes do not have: plan review for larger alterations, backflow protection on water lines, grease interceptors for food service, and work scheduled around business hours. Many Metro Detroit commercial buildings are decades old, with cast iron and galvanized piping that fails under heavy use. Ask about a camera inspection or hydro jetting for recurring line problems, and see tenant improvement contractors for full build-outs. For restaurant lines, see commercial drain cleaning, or compare Detroit plumbers for other work.
What a proper job includes
- Site walk and written scope before planned work
- Service scheduled to limit business disruption
- Licensed plumbing contractor with a designated master plumber
- Permits, plan submittals and inspections handled
- Backflow preventer testing by a certified tester
- Grease line and interceptor service for food service
- Documentation of work, permits and test results for your building records
What drives the price
- Service call vs planned project or build-out
- Building size, number of fixtures and floors
- After-hours or weekend work to avoid closing
- Plan review, engineering or drawings required
- Pipe material and condition of existing systems
- Backflow devices, grease interceptors and special equipment
Rebuild Detroit does not publish price ranges. Get written quotes for the same scope and compare.
Permits and licensing in Michigan
Commercial plumbing needs a licensed plumbing contractor, which must designate a licensed master plumber to supervise installation, and a plumbing permit from the state or local enforcing agency (BSEED in Detroit). Larger alterations may need plan review before the permit is issued, so build that time into the schedule.
Michigan requires public water systems to run a cross connection program, and certain backflow preventers need periodic testing by a certified tester (ASSE 5110). Your water supplier sets the schedule; check the license on the LARA lookup.
Verify: LARA license lookup Detroit BSEED plumbing permits EGLE registered well contractors How We Vet
How to compare quotes
- Provide drawings, fixture counts and access hours for accurate quotes.
- Confirm the plumbing contractor license and master plumber on the LARA lookup.
- Ask for proof of general liability and workers compensation insurance.
- Confirm who handles permits, plan review and inspections.
- Ask for backflow tester certification if testing is included.
- Compare response terms for emergency calls in writing.
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Common questions
Commercial Plumbing in Detroit: FAQ
Yes for most alterations and installations. Larger projects may also need plans submitted for review.
EGLE guidance calls for a tester with ASSE 5110 certification. Your water supplier may also keep a list of approved testers.
It depends on volume and menu. Many owners schedule regular jetting along with grease interceptor service; your plumber can recommend an interval.
Many commercial plumbers offer nights and weekends to avoid closing. Confirm how after-hours work is billed in the quote, and who needs to be on site to give access.
Price depends on whether it is a service call or a planned build-out, building size and fixture count, after-hours work, plan review or engineering, the condition of existing piping, and equipment such as backflow preventers and grease interceptors.
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Compare Metro Detroit plumbers and confirm credentials, scope and cost drivers before you hire.