Commercial sewer camera inspection in Sterling Heights, MI

What's included in a commercial sewer inspection

Whatever triggered the call — maintenance, a sale, a lease, or a dispute — every commercial inspection produces the same documentation package. That consistency is what makes the report useful months later, whether it's sitting in a maintenance file or getting attached to a demand letter.

Pipe materials and defects in commercial buildings

Older commercial buildings across Sterling Heights, Warren, and the rest of Metro Detroit were built across several decades, so it's common to find two or three pipe materials in one building's history — clay or transite laterals from the original construction, cast-iron risers and stacks, and PVC from a past repair. Each transition point is a place roots and offsets like to form. We're looking for the same defects we'd flag on a residential job — root intrusion, cracked or offset joints, bellies holding water, partial or full blockage — but across a longer run with more junctions. A sewer line video inspection of the full run, not just the section nearest a problem fixture, is what catches a defect two units away from where the backup actually showed up.

Restaurant and food-service grease lines

A grease trap slows buildup, it doesn't stop it. Fat, oil, and grease still coat the inside of a food-service line over time, narrowing it until a normal service load backs up — usually mid-shift. The camera shows what a cleaning log can't: how much buildup remains on the pipe walls right now, and whether there's a structural defect underneath it that cleaning alone won't fix. That distinction matters before you approve another round of jetting or sign off on a new tenant's build-out, and it's a common ask during turnover, when a landlord wants the kitchen line documented before the next restaurant tenant takes possession.

Multi-unit buildings and heavy drain loads

A shared lateral under an apartment building, strip mall, or office complex carries far more daily flow than a single-family line, and it was often sized for a different era of tenant use. When one unit's fixtures back up, the cause is frequently downstream — a shared main taking on more volume than it was built for, or a defect that only shows symptoms in the unit closest to the blockage. Documenting the shared line on camera is how you fairly allocate responsibility between units when a backup affects more than one tenant, instead of guessing which lease is on the hook.

Due diligence before you buy or lease a commercial property

The sewer lateral is one of the most expensive systems in a commercial building, and it's routinely left out of a standard property condition assessment. If you're closing on a building or signing a multi-year lease, that's a costly blind spot — the same one we cover on the residential side with a real estate sewer inspection before a home sale. On the commercial side, we scope the line before you sign, so any defect gets negotiated into the deal instead of discovered after you're responsible for it — the exact scenario covered in our guide on commercial pre-sale and lease sewer scoping. It's a step we also walk landlords and property managers through as a standard part of due diligence, and we handle this kind of work for office parks and retail centers throughout the Troy service area and beyond.

What the camera can — and can't — prove

A sewer camera inspection shows the interior of the pipe at the moment we run it: material, cracks, offsets, roots, bellies, and blockage, all on recorded video you keep. It can't predict exactly when a marginal section will fail, assess soil conditions outside the pipe, or inspect a section the camera physically can't reach, such as a fully collapsed run. We tell you plainly when a finding is definitive versus a risk factor worth monitoring — an honest limitation beats false certainty.

Access, equipment, and what limits a commercial scope

Commercial laterals are usually bigger and longer than a residential line — 6- to 10-inch mains instead of 4-inch, sometimes running 150 feet or more from the building to the street tap. A standard push-camera reel handles most single-tenant runs in one pass, but a large multi-building property, a strip mall with several stub-ins, or a lateral with multiple bends may need the reel extended, a secondary access point opened, or the run broken into segments. Access itself varies more than on a house: we've entered commercial lines through exterior cleanouts, roof vents, floor drains in a mechanical room, and buried cleanouts under a parking lot that need to be located first. Heavy grease or sediment buildup — common in food-service lines — can stop the camera short of a full run, in which case jetting or cleaning first is the only way to get a complete picture rather than a partial one.

When a defect turns up and you need to know exactly where it sits before anyone breaks pavement or opens a wall, we pair the camera with a sewer line locating pass using a sonde transmitter. That's the difference between telling a contractor "somewhere under the loading dock" and giving them a marked spot with a depth reading — it's what keeps a commercial excavation targeted instead of exploratory, and it matters even more on a property with underground utilities, irrigation lines, or a parking structure to work around.

Deciding how much of the building to scope

Not every call needs a full-building assessment, and not every spot check tells you what you actually need to know. A few questions usually settle it:

A recurring backup at a Sterling Heights strip mall

A property manager called us about a strip mall on Van Dyke where a nail salon and a small restaurant shared a single lateral, and the salon kept flooding every few weeks even though the restaurant had never had an issue. Two plumbers had already snaked the line from the salon's cleanout with only short-term relief. We ran a full camera scope of the shared lateral from the restaurant's grease-trap outlet all the way to the street tap, and found the real problem two units away from the complaint: a cracked clay joint near the property line was letting roots in, and grease from the restaurant's line was catching on those roots and building a partial dam that backed pressure up toward the salon first, since it sat at a slightly lower elevation. Snaking the salon's own line had never touched the actual defect. With the footage in hand, the property manager split the repair cost between both tenants' leases based on documented cause, instead of assuming it was the salon's problem because that's where the water showed up.

Common mistakes commercial property owners make

• Treating a single jetting or snaking as a permanent fix on a grease-prone food-service line, instead of documenting whether a structural defect sits underneath the buildup
• Assuming a plumber's snake report is the same as a recorded camera inspection — a snake tells you it went through; it doesn't show you what's actually wrong with the pipe
• Skipping a sewer scope before a tenant build-out, then discovering the existing line can't handle the new tenant's fixture count or grease load
• Waiting until more than one unit is affected before scoping a shared lateral, which makes it harder to pin down where a defect actually sits
• Assuming a triple-net lease shifts all sewer responsibility to the tenant without documentation — a dispute over a shared or ambiguous line almost always comes down to who has evidence
• Closing on a commercial property or signing a long lease without ever having the lateral scoped, on the assumption that a general property condition report covers it

Macomb County's aging commercial corridors

Much of the commercial development along corridors like Van Dyke, Mound Road, and Hall Road in Sterling Heights and neighboring Warren went up between the 1950s and 1980s, often on the same clay-tile lateral stock used in the residential subdivisions around them — see our breakdown of clay sewer line failure across Metro Detroit for why that material fails the way it does after 40–70 years in the ground. Older commercial stretches closer to Detroit also sit on or near combined sewer infrastructure, which put more properties at risk of backup pressure during the 2021 Metro Detroit floods than most owners expected. None of that means every older building has a failing lateral, but it does mean age and location are real risk factors worth documenting rather than assuming away — something we see constantly across Macomb County commercial work.

What insurers, buyers, and attorneys look for in the report

A verbal description of a sewer problem doesn't hold up the way a dated, recorded inspection does. When a commercial sewer report ends up supporting an insurance claim, a purchase negotiation, or a tenant dispute, what matters most is that it's independent, specific, and time-stamped: footage showing the actual condition on the day of the visit, still images tied to approximate distances along the run, plain-language notes on material and defect type, and — where relevant — a sonde-located position referenced to a fixed point on the property. Because we don't bid the repair ourselves, that documentation carries more weight with an adjuster, opposing counsel, or a buyer's attorney than a report from whoever is also submitting the invoice to fix it.