Sewer Line Inspections for Home Sales
Sewer Line Inspections in Marin, Sonoma & Napa County
Your sewer line is one of the most critical components of your home’s plumbing system, but because it’s underground, problems often go undetected until serious damage occurs.
At Ongaro & Sons, we offer professional sewer line inspections to help homeowners and home buyers in the North Bay make informed decisions and avoid costly surprises.
Using advanced camera inspection technology, our licensed plumbers can quickly and accurately assess the condition of your sewer line without digging up your yard.
Whether you’re buying a new home, preparing to sell, or simply want to understand the health of your existing plumbing system, a sewer line inspection gives you the insight you need.
From detecting clogs and root intrusions to identifying corrosion, cracks, or collapsed pipes, our inspection service uncovers issues early, when they’re most manageable and affordable to fix.
Sewer Inspections for the Purchase and Sale of a Home
Are you selling or purchasing a home in the North Bay? Or are you a real estate agent helping a client sell or buy a home? Don’t forego a sewer line and plumbing inspection! A sewer line inspection offers real advantages on both sides of the transaction:
- Sewer line inspections allow sellers to uncover and address plumbing problems before putting a home on the market, helping avoid surprises during escrow.
- Buyers gain peace of mind knowing the condition of the sewer line and plumbing system before closing, supporting a more informed and confident purchase.
- Inspection findings can be used to negotiate the sale price or request repairs or credits from the seller before finalizing the deal.
- Knowing the sewer line’s condition upfront protects buyers from unexpected repair costs after they take ownership of the property.
- A completed sewer inspection can be a strong selling point for sellers and real estate agents. It demonstrates transparency and helps attract serious buyers.

Camera Inspection by Licensed Plumbing Experts
Call Ongaro & Sons when you need a team of experts to assess the health of your plumbing and sewer line systems. We have the highest level of licensing in California and remain diligent about staying up to date with new and advanced technology in our industry.
Don’t wait for a plumbing emergency, schedule a sewer line inspection today and enjoy peace of mind knowing your system is in good shape.

Schedule Your Sewer Line Inspection Service
Whether you’re preparing to sell your home, finalizing a purchase, or simply want peace of mind as a homeowner, a professional sewer line inspection is one of the smartest decisions you can make. We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, San Rafael, Novato, and surrounding cities. Call us now at 415-741-2820 or book your appointment online for fast, reliable service you can trust.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Sewer Inspections Before a Sale
A lateral inspection is the cheapest way to stop a sale falling apart in the last fortnight.
Schedule Service →A recorded inspection you can hand to either side
Video and a written finding give the buyer, the seller and the agent the same facts, which is what keeps a negotiation from becoming a guess.
Findings separated into must-fix and monitor
Not every imperfection on a camera survey is a defect that needs correcting before completion. Saying which is which is the useful part.
Repair costed at the same time
If something does need doing, you get a real number rather than an allowance invented in escrow.
C-42 sanitation system licensed
Santa Rosa requires a Class A or C-42 contractor for lateral plumbing. We hold it, so an inspection can turn into a repair without a second contractor.
Scheduling that fits a transaction timeline
Ongaro & Sons has worked with North Bay homeowners and agents since 1932.

Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
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Read MoreFrequently Asked Questions
Can sewer odors enter my home?
Yes, dry P-traps, cracked vent lines, or broken seals can allow gases to escape indoors.
Do I need permits for sewer line installation?
Yes, permits and inspections are required to ensure code compliance and public safety.
How often should I inspect my sewer line?
Have your line inspected with a camera every 1–2 years, especially if your home is older or surrounded by trees.
What causes sewer backups?
Common causes include tree roots, grease buildup, damaged pipes, and flushing inappropriate items.
What materials are used in modern sewer line replacement?
Durable options like PVC or HDPE are commonly used for their longevity and resistance to corrosion or root intrusion.