Picture a hundred-year-old clay lateral running under a driveway in Almond Grove, its joints separated just enough for a root hair to find the gap. Nobody sees this. Not the seller repainting the kitchen, not the buyer touring on a Sunday afternoon, not the town issuing paperwork. The first person who sees it is a plumber with a camera on a cable, hired by the buyer, three days before the inspection contingency expires.
That sequence is not an accident. It is a direct result of a decision Los Gatos made, or rather did not make. Unlike a growing list of California cities, the Town of Los Gatos has no ordinance requiring a sewer lateral inspection or compliance certificate before a home changes hands. Saratoga shares that distinction. Santa Cruz does not. Castro Valley does not. San Bruno does not. Burlingame does not. Los Gatos sellers of older homes are operating without a rule that a growing list of California cities already enforce, and the absence of that rule is precisely what makes the sewer line one of the most common disclosure fights in a Los Gatos escrow.
The Ordinance Los Gatos Never Passed
In cities with a point-of-sale requirement, the sewer question gets answered before the home ever hits the market. Castro Valley Sanitary District requires every property changing hands within its boundaries to carry a valid Sewer Lateral Inspection Exemption Certificate before close of escrow, a rule that has been in effect since July 2019. The City of Santa Cruz has required a point-of-sale inspection since an ordinance took effect in 2018. San Bruno enforces its version only on homes over 50 years old, a threshold it began enforcing in 2015. Burlingame's municipal code goes further, requiring lateral testing and repair whenever a structure built more than 25 years before the transfer is involved.
Los Gatos has none of this. According to a chart maintained by HomeGuard and reported by the Silicon Valley Association of Realtors, Los Gatos and Saratoga are grouped with San Jose as cities that do not require sewer lateral inspections at all. West Valley Sanitation District, which owns and maintains the public sewer system for Campbell, Los Gatos, Monte Sereno, and two-thirds of Saratoga, plays essentially no role in what happens to the private lateral running from a home to that public main. The lateral is the homeowner's asset, the homeowner's liability, and, in this town, entirely the homeowner's decision whether to look at it before selling.
Here is how that gap compares to the cities most often mentioned in the same breath as Los Gatos:
| City | Point-of-sale sewer rule | What triggers it |
|---|---|---|
| Los Gatos | None | Not applicable |
| Saratoga | None | Not applicable |
| Santa Cruz | Required since 2018 | Any sale within city limits |
| Castro Valley | Required since July 2019 | Any sale within CVSan boundaries |
| San Bruno | Required since 2015 | Home over 50 years old |
| Burlingame | Required, municipal code | Structure built 25+ years before transfer |
Why the Gap Cuts Deeper Here Than Elsewhere
A missing ordinance would matter less in a town with uniformly newer housing stock. Los Gatos is not that town. The pipe running under a home built in the 1970s hillside communities has almost nothing in common with the pipe under a cottage near downtown, and the difference is not cosmetic.
Downtown and the historic core, including the Almond Grove neighborhood recognized by the Town for its late-1800s development by figures like banker Alphonse Eli Wilder and orchardist John Bean, still carries original clay sewer pipe well over a century old in places. The flatland neighborhoods that filled in during the postwar decades were built with clay or Orangeburg, a tar-paper composite pipe that was standard through the 1950s and 60s and is now known for collapsing under sustained moisture. The hillside subdivisions that came later, through the 1970s and 80s, used ABS plastic, which resists the root intrusion that plagues the older materials but is not immune to the joint stress that comes with shifting hillside soil.
Three build eras, three failure modes, one town, and no ordinance forcing anyone to check any of them before a sale. That combination is why local plumbers who specialize in trenchless repair describe sewer line replacement as one of the most frequently negotiated disclosure items in Los Gatos transactions, a pattern that tracks with a housing stock old enough in parts to have outlived its original plumbing twice over.
What Fills the Space Where a Certificate Would Be
In a city with a point-of-sale ordinance, the process has a shape. Castro Valley Sanitary District's program tests the lateral before closing and, if it fails, issues a Notice to Repair within 30 days, giving the seller a defined window and a defined next step. There is a form. There is a timeline. There is a third party the buyer and seller can both point to.
Los Gatos has no equivalent structure, which means when a sewer problem surfaces, it surfaces entirely inside the private negotiation between buyer and seller, usually during the inspection contingency, usually with a clock already running. A buyer's inspector recommends a camera scope. The scope finds a bellied section or a root mass. Now the seller is negotiating a five-figure repair estimate under contract deadline pressure, with no certificate, no district-mandated exemption, and no prior warning built into the process by anyone but the seller's own foresight.
That is the actual cost of the missing ordinance. It does not remove the sewer line as an issue. It just removes any structure around when and how the issue gets discovered, and hands that timing entirely to the buyer's side of the table.
The Sequence a Seller Can Still Control
None of this requires waiting for the Town to catch up to its neighbors. A seller can build the same certainty a point-of-sale ordinance would provide, just earlier and on their own terms.
- Place the home in its build era. A cottage near downtown or in Almond Grove is a different conversation than a 1970s hillside home in Surmont, and knowing which conversation applies changes what to ask for in a quote.
- Commission a private camera inspection before listing, not after an offer is in hand. This is the single step that converts an unknown into a known number, months before a buyer's inspector would find the same thing under contract.
- Get written estimates for both a full replacement and trenchless lining. Local contractors quote full sewer line replacement in Los Gatos in the range of roughly $5,000 to $16,000 depending on length and access, with permit costs from the Town's building division typically running $280 to $640. Trenchless cured-in-place lining, which threads a new pipe inside the old one without digging up a driveway or a mature garden bed, tends to fall in a similar or slightly lower range and is often the preferred option in the historic districts and hillside lots where excavation would mean tearing up landscaping that took decades to establish.
- Decide, with the numbers in hand, whether to complete the repair before listing, disclose the condition and price it into the offer, or offer a credit. Each is a legitimate strategy. None of them work well when the seller is choosing under pressure three days before a contingency deadline.
The Backwater Valve Wrinkle
One related detail catches sellers off guard for a different reason. Los Gatos Town Code section 22.20.055(b) states plainly that the Town is not liable for damage from a sewer overflow if the property owner has not installed and maintained a backwater valve. This is not about the lateral's condition. It is about whether a one-way valve exists to stop a public system backup from pushing wastewater into a lower-elevation home. Older homes, especially those built before the valve became standard practice, may not have one, and the Town's own guidance suggests involving West Valley Sanitation District when investigating whether a property needs one. It is a small, inexpensive fix that rarely comes up until an inspector asks about it, usually in the same conversation as the sewer scope.
Why This Matters Beyond the Repair Bill
The absence of a Los Gatos ordinance is often read as good news, one less requirement, one less cost, one less delay. The pattern in local transactions suggests the opposite reading is closer to accurate. The requirement other cities impose does not eliminate the underlying pipe problem. It just moves the discovery earlier and gives both sides a shared process for handling it. Los Gatos sellers get neither the requirement nor the process, only the same aging infrastructure everyone else has, discovered on someone else's timeline unless the seller moves first.
For a seller with a home in Almond Grove, along Broadway, near Fairview Plaza, or in one of the postwar flatland neighborhoods, the sewer line is not a box the Town will make you check. It is a decision only the seller can choose to make early, or leave for a buyer's inspector to make for them.
If you are weighing a sale of an older Los Gatos home and want a clear-eyed read on what a pipe inspection is likely to show and how to sequence it against the rest of your prep list, Knight Roberts Real Estate can walk through the specifics with you. Explore more about the Los Gatos market or start with a home valuation to see where your numbers stand today.
Frequently Asked Questions
Does Los Gatos require a sewer lateral inspection before I can sell my home? No. Los Gatos and Saratoga are both listed as cities without a point-of-sale sewer lateral inspection requirement, unlike other California cities such as Castro Valley and San Bruno.
Who is responsible for the sewer lateral, the homeowner or West Valley Sanitation District? The homeowner. West Valley Sanitation District maintains the public sewer main serving Campbell, Los Gatos, Monte Sereno, and part of Saratoga, but the private lateral connecting a home to that main is the property owner's responsibility to maintain and repair.
Is trenchless repair a realistic option for a home in one of the historic districts? Yes, in most cases. Trenchless lining and pipe bursting methods are commonly used specifically because they avoid excavating mature landscaping, brick walks, and original hardscape that define neighborhoods like Almond Grove.
Does the Town of Los Gatos require a permit for sewer line repair or replacement? Yes. The Town of Los Gatos Building Division requires a permit for sewer line work regardless of whether the repair is trenchless or a traditional dig, separate from any West Valley Sanitation District review.
