The Indiana septic permit, start to finish
A septic permit in Indiana is issued by your county health department and signed by the health officer. The state writes one rule, 410 IAC 6-8.3, and all 92 counties administer it with their own forms and fees. Before a permit can be issued somebody has to describe the soil on your property, and that soil profile decides what system you are allowed to build. Counties issue more than 15,000 permits a year for new systems and about 6,000 for repairs, so this is a routine process, just an unfamiliar one.
Who issues the permit?
The local health department, not the state. The rule puts the duty on the property owner or the owner's agent to obtain a written construction permit signed by the health officer before the work begins. The Indiana Department of Health writes the rule and reviews commercial system plans; residential permits, inspections and records stay at the county.
Source: 410 IAC 6-8.3-53(a), Indiana Administrative Code, read 2026-08-20.
What triggers a permit?
The permit is required before the start of construction of a residence, the placement of a manufactured, modular or mobile home, the construction or placement of a residential outbuilding that will include plumbing or the addition of plumbing to an existing one, and the replacement, reconstruction, expansion or remodeling of a residence that may increase the number of bedrooms.
The remodeling trigger catches people out. Adding a bedroom, or adding anything the county counts as one, changes the size the system has to be, and that is a permit matter rather than a plumbing detail.
Source: 410 IAC 6-8.3-53(a), read 2026-08-20.
What has to happen before the county will issue it?
Before any construction permit is issued, and before a soil absorption system is replaced or altered, an on-site evaluation including a description of the soil profile has to be conducted. The soil is described by a soil scientist using NRCS guidelines, and the profile is recorded to a depth of five feet or until a layer is reached that cannot be read.
In order: soil evaluation, then a system design that suits the soil, then the permit application, then the county's decision. A contractor who tells you the soil work can wait until after the permit has the sequence backwards.
Source: 410 IAC 6-8.3-56(a) to (c), read 2026-08-20.
Is there a second permit after the system is running?
A local health department may require a written operating permit. Where it does, the permit is renewed at least once every three years for systems with components other than a septic tank that need scheduled inspection and maintenance, and at least once every five years for all other systems.
Whether your county requires one is a county question. Ask when you apply, because the renewal cycle starts running from the day the system goes in.
Source: 410 IAC 6-8.3-54(a), read 2026-08-20.
What does the permit cost?
Counties set their own fees, so there is no statewide number and any figure you see quoted as "the Indiana septic permit fee" is one county's fee. Your county health department publishes its fee schedule, and the contractor doing the work usually knows it by heart. What we will not do is print a number here that is wrong in 91 counties.
Who is allowed to do the work?
Indiana has no state license for septic installers, so the answer is set county by county. Many counties require an IOWPA certificate and some run their own installer permit and exam.
What Indiana counties require of a septic installer
Source: Indiana Professional Licensing Agency, professions list, read 2026-08-20.
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Tell us the county and the jobLast reviewed 2026-08-20.