Most sellers of an older Burlingame home assume the sewer question got answered during the general home inspection, when the inspector ran a camera down the line and handed over a report. That assumption is wrong, and it tends to surface at the worst possible moment: a week or two before a scheduled close, when someone finally checks whether the property complies with the city's actual sewer lateral ordinance.
Burlingame's rule is not the same as a standard camera scope, and it is not something a buyer's inspector satisfies on your behalf. It is a separate, city-witnessed test that the seller is responsible for arranging, and the city will not let title transfer until the property either passes it or gets repaired until it does.
What the Ordinance Actually Requires
Burlingame's Sewer Lateral Test Ordinance, first adopted as Ordinance 1329 and later revised by Ordinance 1623 in 2000, is codified today as Section 15.12.110 of the Burlingame Municipal Code. The rule is direct: whenever a property with a building constructed more than 25 years before the transfer changes hands, the sewer lateral connecting that building to the city main has to be tested for infiltration, and any necessary repairs or replacement have to be completed and approved by the city before title can transfer.
The city places the burden of figuring out whether testing applies squarely on the property owner. There is no automatic flag from escrow, no reminder built into a standard purchase contract, and no assumption that a listing agent or title company will catch it. If your home was built before roughly 2001, it likely qualifies, and it is on you to know that before you sign a listing agreement.
Why the Camera Your Inspector Already Ran Doesn't Count
Here is the detail that catches sellers off guard. Burlingame's own guidance is explicit that video inspection is not accepted for compliance purposes. The test has to be a physical infiltration test, either a water exfiltration test or an air test, and it has to be witnessed in person by a city representative.
The water test works by plugging the lateral and riser at the city cleanout, then filling the line with water to a level at least two feet above the connection point at the cleanout. If any fixture inside the home sits lower than that testing water level, the contractor has to plug the fixture separately or install an approved backwater valve first. In hillside areas, where water pressure inside the pipe can run too high for an accurate reading, the city allows an air test instead. Either way, someone from the city has to be there to watch it happen, and a Plumbing Permit is required for the work itself.
That is a meaningfully different process from the sewer scope most buyers request during a standard inspection contingency, and it is why a clean inspection report is not proof that a Burlingame home is ready to close.
How Burlingame Compares to Its Neighbors
Part of what makes this confusing is that San Mateo County does not apply one rule countywide. Seven cities require some form of inspection and compliance certificate before a sale can close, and they do not agree on methodology.
| City | Test method | When it applies |
|---|---|---|
| Burlingame | Witnessed water or air infiltration test; video is not accepted | Any sale of a building more than 25 years old |
| Hillsborough | Video camera run through the lateral, unless it connects within a street right of way, in which case a water test applies | At time of sale, under a program running since 2012 |
| Millbrae | Video inspection | At time of sale |
| San Mateo | No single mandated method | Triggered by a sale or by certain remodel and sewer backup events, under an ordinance effective December 2020 |
| Belmont | No mandatory test; sewer lateral condition is handled as a listing disclosure | The city considered a point-of-sale testing program in 2014 and settled on disclosure instead |
| San Carlos | Test required when remodeling, not automatically at sale | Not a point-of-sale trigger |
A seller who has moved from Hillsborough to Burlingame, or who owns property in both, can reasonably assume the video inspection that satisfied one city will satisfy the other. It will not. Confirming the specific method your city requires, before you schedule anyone, saves a repeat trip and a second invoice.
The Number That Should Change Your Pre-Listing Checklist
Since Burlingame enacted the ordinance in 1986, roughly half of the homes tested under it have required some form of repair or replacement before the lateral passed. That is not a rare outcome. It is closer to a coin flip.
The city allows one free retest if the first attempt fails, but after that, repair or full replacement is required, followed by another witnessed test, until the line passes. Only then can the transaction proceed to title transfer. The city does not dictate who pays for testing or repairs. That gets negotiated between buyer and seller like any other item, but the work itself is not optional and the timeline is not flexible.
A handful of practical exemptions exist. Condominium and cooperative units are excused from the requirement entirely, except when a building is converting to condominium ownership. A property is also excused for ten years after a passing test, or for 25 years after a full, city-approved replacement. If the city engineer determines the piping is short enough and simple enough that testing is unnecessary, that can excuse a property too, though that determination is made case by case.
Why Age Makes This Nearly Universal in Burlingame
The 25-year threshold sounds narrow until you look at how old Burlingame's housing stock actually is. The city's own general plan materials describe Burlingame as holding a wealth of older building stock that forms the basis of the community's character, with residential growth proceeding in waves starting in the 1890s, around the same era the Burlingame train station was built in 1893 and 1894, according to the city's Envision Burlingame general plan. The decades that followed layered in Craftsman bungalows through the 1910s and 1920s, Spanish and Tudor Revival homes through the 1920s and 1930s, and postwar traditional homes in the 1940s and 1950s.
Almost none of that building stock falls outside the ordinance's 25-year window. In a city developed this early and this steadily, the requirement is not a corner case that applies to a handful of unusual properties. It applies to most of what is actually for sale.
Building Your Timeline Backward From Listing Day
The ordinance's real cost to a seller is rarely the test fee itself. It is the time a failed test adds to a transaction that was otherwise ready to close. A few sequencing decisions make the difference between a routine sale and a stalled one.
- Order the test before you schedule photography or set a listing date, not after you have an accepted offer.
- Ask your plumber directly whether they perform Burlingame's witnessed test, since a contractor experienced with Hillsborough's video method may not be set up for Burlingame's water or air test.
- Coordinate with Burlingame's Public Works Department early to schedule the city representative who has to witness the test in person.
- If the test fails, budget for repair, permitting, and a second witnessed retest, all of which have to be city-approved before your closing date is realistic.
- Keep any prior test certification or replacement paperwork on hand. A property that passed within the last ten years, or was fully replaced within the last 25, may already be exempt.
A Few Direct Questions
Does this apply to my condo? No. Condominium and cooperative units are excused under the ordinance, except when a building is converting to condominium ownership.
What if my lateral was already replaced? A full replacement that was permitted and approved by the city is good for 25 years from that approval. A passing test alone is good for ten years.
Who has to pay for the test and any repairs? The city takes no position on this. It gets worked out between the parties as part of the transaction, the same way other repair credits or concessions do.
What happens if the test fails? The city allows one free retest. Beyond that, the lateral has to be repaired or replaced and retested, with the work approved by the city, before title can transfer.
Selling an older Burlingame home rewards the sellers who treat this ordinance as a scheduling problem to solve in month one, not a surprise to manage in week three. If you are weighing when to list a property built before the early 2000s, Peninsula Realty Partners can help you sequence the sewer lateral test, permitting, and your marketing timeline so none of them collide. Reach out for a consultation before you set a date.
