Sourced from the Los Angeles County FY 2025-2026 Public Health fee schedule, County Code Title 11 Division 1 Chapter 11.38, the ordinance adopting the county’s Local Agency Management Program, and USDA and RCAC program material — last checked August 2026.
What LA County Charges
These are the amounts published in the county’s FY 2025-2026 Public Health fee schedule. OWTS is a conventional onsite wastewater treatment system; NOWTS is a non-conventional one, meaning it uses supplemental treatment.
| Permit | Fee |
|---|---|
| OWTS, new or replacement (conventional) | $1,528.00 |
| NOWTS, new or replacement (non-conventional) | $1,986.00 |
| OWTS or NOWTS modification or repair, without prior approval | $522.00 |
| OWTS or NOWTS modification or repair, with prior approval | $447.00 |
Note the $75 gap between a repair with prior approval and one without. Getting the county’s sign-off before work starts is cheaper than explaining it afterwards.
The 200-Foot Rule Is the Number That Matters
This is the part that changes budgets, and most LA County septic owners have never heard of it until it applies to them.
County Code §11.38.730 says the Director of Environmental Health shall not issue a permit for a new onsite system, nor approve the repair or replacement of one, nor approve a project requiring the evaluation of an existing one:
Read what that means. In much of Los Angeles County, a failing septic system is not a repair job. It is a mandatory sewer connection, and the cost of a lateral, the trenching and the connection fees dwarfs the $1,528 permit.
The third clause catches more people than the first two: a project “requiring the evaluation of an existing onsite wastewater treatment system.” That is the remodel and addition case. You may not be touching the septic system at all and still find the rule applies to you.
So the first question on any LA County septic project is not what it costs. It is how far the nearest sewer main is from your building.
Get Free Quotes From Local Septic Pros
Three fields, about fifteen seconds. No cost and no obligation.
We pass your request to licensed local companies so they can quote you directly. Your details are never published or sold on.
When the County Says Your System Has Failed
§11.38.042 defines failure by sewage backup, discharge to the surface, excessive pumping frequency, structural failure, or groundwater contamination.
Where the Director finds a system at risk of failing, §11.38.820 gives the owner seven days to obtain an evaluation. That is a genuinely short window, and worth knowing before a letter arrives.
There Is No Point-of-Sale Inspection Requirement
LA County does not require a septic inspection when a property changes hands. We checked this across three separate county documents — the OWTS Requirements and Procedures document, the ordinance that adopted the county’s Local Agency Management Program, and the Environmental Health program pages. The LAMP ordinance is explicit that there is “no mandatory inspection requirement triggered by property sales or transfers.”
That does not make an inspection a bad idea when buying. It means nobody is going to require one of you, and anyone telling you the county mandates it is mistaken.
City of Los Angeles Is a Separate Question
If your property is inside the City of Los Angeles rather than unincorporated county territory, a different rule may apply. LAMC §64.26 provides for mandatory abandonment of private sewage disposal systems in parts of the San Fernando Valley area, requiring connection within one year of a Notice to Connect, with variances not to exceed two years and enforcement that can extend to water shutoff.
Assistance: There Isn’t Any
Los Angeles County publishes no septic repair or replacement assistance. Not on the Environmental Health site, not in the LAMP-adopting ordinance, which contains no provisions for grants, rebates or financial aid, and not in the fee schedule.
That leaves the statewide routes, and one of them is a poor fit here. USDA Section 504 requires the property to sit in a USDA-eligible rural area, which excludes most of urbanized Los Angeles County — though not all of it, and the USDA property eligibility tool settles your address in about a minute. RCAC lends up to $15,000 at 1% but limits itself to communities of 50,000 or fewer, which rules out most LA County addresses.
Where a sewer connection is what you actually need, ask your local sewer agency about connection financing rather than looking for septic assistance. Districts elsewhere in California run substantial programs of this kind — Central San in Contra Costa County finances up to $65,000 through the property tax roll — and the equivalent question in your area is worth asking of whoever operates the sewer.
The full picture, including which California routes are real and which are dead ends, is on our California septic assistance page.
Who to Call
LA County Department of Public Health, Environmental Health Division — Onsite Wastewater Treatment Program
- 5050 Commerce Drive, Baldwin Park
- (626) 430-5380
The Los Angeles Regional Water Quality Control Board sets the overlying policy, but County Public Health issues the homeowner’s permit. Start with the county.
Need Help With New Installation?
Tell us what’s going on and we’ll connect you with a licensed California provider. Free, and no obligation.
Independent — not affiliated with any state or county health or environmental agency, and not a septic contractor.
Frequently Asked Questions
How much is a septic permit in Los Angeles County?
The county’s FY 2025-2026 fee schedule lists $1,528.00 for a new or replacement conventional onsite wastewater treatment system, and $1,986.00 for a non-conventional one. A modification or repair is $447.00 with prior approval and $522.00 without. That fiscal year has now ended, so confirm the current figures on (626) 430-5380 before budgeting.
Can I replace my septic system in LA County if there is a sewer nearby?
Not if a public sewer is available within 200 feet of your building. County Code section 11.38.730 bars the Director from issuing a permit for a new system, approving a repair or replacement, or approving a project requiring evaluation of an existing system where a sewer is available within that distance. In much of Los Angeles County a failing septic system is therefore a mandatory sewer connection rather than a repair, and the connection costs far more than the permit. Measure the distance to the nearest main before anything else.
Does Los Angeles County require a septic inspection when you sell a house?
No. There is no point-of-sale septic inspection requirement in Los Angeles County. The ordinance adopting the county’s Local Agency Management Program states there is no mandatory inspection requirement triggered by property sales or transfers, and neither the OWTS Requirements and Procedures document nor the Environmental Health program pages impose one. An inspection is still sensible when buying, but nobody will require it of you.
Is there financial help for septic repair in Los Angeles County?
The county publishes none — not on the Environmental Health site, not in the LAMP ordinance, and not in the fee schedule. The statewide routes are also a poor fit here: USDA Section 504 requires a USDA-eligible rural area, which excludes most of urbanized LA County, and RCAC limits itself to communities of 50,000 or fewer. If a sewer connection is what you need, ask whoever operates your local sewer about connection financing rather than looking for septic assistance.