Apartment & Multi-Family Sewer Rehab in Van Nuys, Panorama City & the San Fernando Valley

Published May 18, 2026 • BBC Rooter & Plumbing • Northridge, CA

If you manage or own an apartment building, condo complex, or multi-family property in the San Fernando Valley, your sewer system is handling 10 to 50 times the volume of a single-family home — and it's probably running through the same aging cast iron pipe that was installed when the building went up in the 1960s or 1970s.

Multi-family sewer failures are different from single-family problems. The stakes are higher (multiple tenants affected, potential habitability complaints, city code enforcement), the pipe diameters are larger (6-inch to 12-inch mains vs. 4-inch residential laterals), and the repair logistics are more complex (parking lot access, tenant notification, building permit requirements). Here's what property managers and building owners in Van Nuys, Panorama City, North Hills, and the surrounding Valley need to know.

Why Multi-Family Sewer Systems Fail Faster

Higher Volume = Faster Wear

A 20-unit apartment building pushes roughly 4,000 to 6,000 gallons of wastewater through its sewer main every day. That's 20 times what a single-family home generates. The constant flow accelerates pipe corrosion (especially in cast iron), accelerates grease accumulation, and makes root intrusion problems worse faster — a small root mass that would take 2 years to clog a residential lateral can block a high-volume commercial line in 6 months.

Shared Laterals and Connection Points

Most Valley apartment buildings from the 1960s-1980s era use a shared sewer lateral — one main line that collects waste from every unit and runs to the city main in the street. Each unit connects to this shared line through branch connections, and each of those connections is a potential failure point. Older buildings often have hub-and-spigot cast iron joints at every connection, and those joints are where roots enter, offsets develop, and corrosion concentrates.

Grease from Multiple Kitchens

Twenty kitchens pouring cooking grease, oil, and food waste into the same line creates a grease problem that no single-family home has to deal with. In buildings without a grease trap (and most 1960s-era Valley apartments don't have one), the grease accumulates in the shared lateral and solidifies. Regular hydrojetting is the only way to keep these lines flowing.

Sewer Rehab Options for Multi-Family Properties

Option 1: Hydrojetting Maintenance Program

For buildings where the pipe is still structurally sound but accumulates grease, roots, or scale, a scheduled hydrojetting program is the most cost-effective approach. BBC Rooter uses commercial-grade hydrojetting equipment rated for 6-inch to 12-inch sewer mains — the larger nozzles and higher flow rates required for multi-family lines (residential machines aren't powerful enough).

Typical schedule: hydrojet the main lateral once or twice per year, with a camera inspection every 2-3 years to monitor pipe condition. Annual cost for a 10-20 unit building: $800 to $2,000 per session.

Option 2: CIPP Lining (Trenchless)

CIPP lining is often the best solution for multi-family buildings because it avoids the massive disruption of excavation. The liner is installed through an existing cleanout or small access pit — no tearing up parking lots, no blocking driveways, no relocating tenants. The building's sewer can typically be back in service the same day.

CIPP works on 4-inch to 12-inch pipes, which covers the range used in most Valley apartment buildings. The liner has a 50+ year design life, making it a long-term solution rather than a temporary patch. Cost for a typical 100-foot shared lateral: $8,000 to $25,000 depending on diameter and access conditions.

Option 3: Pipe Bursting

When the existing pipe is too deteriorated for lining (collapsed sections, severe bellies, or extensive root damage), pipe bursting replaces it with new HDPE pipe by pulling the new pipe through the old one, shattering the original pipe outward. This is more disruptive than CIPP but less disruptive than full excavation — it requires only two access pits (entry and exit) rather than a continuous trench.

Pipe bursting is the preferred method when the building needs a larger diameter pipe (upsizing from 6-inch to 8-inch to handle increased flow, for example) or when the existing pipe has multiple bellies that can't be lined over.

Option 4: Traditional Excavation and Replacement

Sometimes there's no trenchless alternative — the pipe is fully collapsed over a long run, the line needs to be re-graded to fix persistent bellies, or the building's sewer layout needs to be reconfigured. Traditional excavation is the most expensive and disruptive option, but it's the only one that solves certain structural problems. Cost: $15,000 to $50,000+ depending on depth, length, and surface restoration (parking lot repaving, landscaping, etc.).

The Multi-Family Sewer Inspection Process

BBC Rooter's approach for apartment buildings and multi-family properties follows a specific sequence:

1. Locate all cleanouts and access points. Many Valley apartment buildings have cleanouts buried under landscaping, hidden behind dumpster enclosures, or paved over during parking lot resurfacing. We locate them before scoping.
2. Full camera inspection of the shared lateral. We document every joint, every connection, every root mass, every belly, and every area of corrosion. The camera footage becomes the basis for the rehab recommendation.
3. Branch line inspection. If individual units are experiencing backups, we camera the branch connections to determine whether the problem is in the shared lateral or in a unit-specific branch.
4. Written report with options. Property managers get a written report with camera footage, a map of the pipe layout, and cost estimates for each repair option — from maintenance-only to full replacement.

Common Multi-Family Sewer Problems in the Valley

The most frequent issues BBC Rooter sees in Van Nuys, Panorama City, North Hills, and Sylmar apartment buildings:

• Cast iron corrosion at the belly of the pipe — the bottom of the pipe corrodes first because that's where water sits. In a high-volume building, this happens faster.
• Orangeburg pipe in 1950s-era buildings — this tar-paper pipe was cheap and common in postwar construction. It collapses under soil pressure after 40-50 years. If your building has Orangeburg, it needs replacement, not lining.
• Root intrusion from street trees — city-planted ficus, magnolia, and carrotwood trees along Van Nuys Blvd, Sepulveda Blvd, and other major streets send roots directly into apartment building laterals that run under the sidewalk to reach the city main.
• Grease blockages from multi-kitchen buildings — buildings without grease traps accumulate FOG (fats, oils, grease) in the shared lateral. Without regular hydrojetting, these blockages cause backups into ground-floor units.
• Backups into ground-floor units — in a multi-family building, a mainline blockage always affects the lowest-elevation units first. Ground-floor tenants experience backups while upper-floor units may not notice any problem.

BBC Rooter & Plumbing provides sewer inspection, rehab, and maintenance for apartment buildings, condo complexes, and multi-family properties in Van Nuys, Panorama City, North Hills, Sylmar, Northridge, Reseda, and throughout the San Fernando Valley. Licensed contractor CSLB #720343. Call 818-280-9135 for a free estimate.