How Septic Permits Work in Warren County, Kentucky
Updated October 2026. Steps follow the Barren River District Health Department's installation guide and Kentucky's onsite sewage rules, for owners planning more than routine septic tank pumping.
Who Issues Septic Permits in Warren County
Septic permits in Warren County come from the Barren River District Health Department, which provides public health services in eight counties: Barren, Butler, Edmonson, Hart, Logan, Metcalfe, Simpson and Warren. Warren County's Focus 2030 plan states plainly that the decision sits with the health department, outside the control of the county, the city or the planning commission.
The legal backbone is KRS 211.350, which says nobody may build, install or alter an on-site sewage system without first getting a permit from the local health department. Apart from farmstead owners working on their own property, the work must be done by someone the state has certified.
The Permit Steps, in Order
The district's installation guide lays the process out in a fixed order:
- Fill out the Application for Site Evaluation, form DFS-319, which asks about the lot, the planned house, the number of bedrooms, a garbage disposal and a basement.
- Sign the district's owner affidavit; the bedroom count and garbage disposal answers set the size of the system.
- Attach a drawing of the property; Warren County asks for a plot plan showing wells, ponds, streams, easements and sinkholes.
- Turn in the application, affidavit, drawing and fee at the county health department.
- Have two backhoe pits dug, or ready, for the scheduled site evaluation.
- Hire a certified septic system installer, who needs a copy of the completed site evaluation to bid.
- The installer lays out the system and takes a proposed drawing to the certified inspector for approval.
- Once the drawing is approved, the inspector issues the construction permit.
- Build within the permit's one-year life, then call for the final inspection before anything is backfilled.
Backhoe Pits: What the Health Department Asks For
From February 2017 on, every site evaluation application in the district's eight counties has needed two backhoe pits in the general area of the planned system. The pits sit 40 to 50 feet apart, go 42 inches deep and are at least 24 inches wide, so the certified inspector can climb in and look at the soil.
The policy recognizes that 42 inches is not always possible: bedrock, a high water table or a restrictive layer such as a fragipan or a clay pan can stop the dig. The owner arranges the digging, pays for it and tells the health department when the site is ready.
Fees and Timing
These are the numbers to plan around. The fees come from the district's installation guide, which is several years old, so confirm them with the Warren County Health Department before you budget.
| Item | Amount or time | Source |
|---|---|---|
| Site evaluation fee | $230 | Barren River District Health Department guide |
| Construction permit fee | $315 | Barren River District Health Department guide |
| Health department site evaluation | Within 15 working days of the application | KRS 211.350 |
| Permit life | Expires one year from issue unless extended | 902 KAR 10:085 |
Backhoe pit digging is a separate cost the owner pays to whoever does the digging.
How the Site Gets Rated
Under 902 KAR 10:085, a certified inspector or a professional engineer rates each part of a proposed site as Suitable, Provisionally Suitable or Unsuitable on an official form. A site rates Suitable only when it has twice the usable land the system needs, which leaves room for a future replacement field.
Karst shapes many of those ratings around Bowling Green. Ground within 70 feet of an open sinkhole throat is rated Unsuitable, and lateral fields may not be placed within 12 inches of bedrock or squeezed in by blasting it. Our karst guide covers the setbacks in detail.
The Forms You Will See
- DFS-319: the site evaluation application, with a location map and a site drawing attached.
- Owner affidavit: the district's form for bedrooms and garbage disposal use, which drive the system size.
- DFS-326: the existing sewage system form, recording an older system's install date, tank size, lateral field length and repair area.
- DFS-330: the installer's affidavit, recording level readings for each trench and certifying the excavation met the rule.
- DFS-450: for drip systems only, a covenants form written into the property deed so future owners know what is in the ground.
Who Can Do the Work
Kentucky certifies septic installers under KRS 211.357. Licensed master plumbers are certified automatically, and new installers start on a probationary certificate that becomes full certification after five inspected installations, so it is fair to ask which one an installer holds.
A homeowner can also get a permit under 902 KAR 10:110 for a single-family home they live in or are building for themselves, once every five years, and must do the work personally. A Kentucky-licensed professional engineer may do the site evaluation and design instead of the health department, but the final inspection still belongs to the local health department.
Repairs and Changes to an Existing System
Permits are not only for new homes. Under 902 KAR 10:085, anyone who wants to alter an existing lateral field pays the fee and applies with a basic site plan, and every system that is installed, altered or repaired must be inspected by a certified inspector.
The same rule allows repairs to an existing system when no public sewer is available and the work is needed because of a malfunction, damage or an upgrade. KRS 211.350 also asks owners to protect an approved site and request a new look if conditions on it change significantly before the work is done.
After the Final Inspection
A system that fails the final inspection has to be rebuilt as needed, and KRS 211.350 bars anyone from using a system an inspector finds was not built to the permit. Once it passes and is backfilled, the owner may start using it. Complaints about a system, an installer or a pumper go to the local health department, according to the state's onsite sewage program.