- A homeowner can put in a standard or basic system on their own property with no hired help.
- Plan for a trade exam.
- A surety bond of $10,000 for a basic installer or $30,000 for a complex installer.
- Every year. Permits expire January 1. Installers also take an approved refresher course every three years.
Do you need a state license in Idaho?
Idaho licenses septic system work at the state level through the Idaho Department of Environmental Quality, with the seven public health districts. Below is what the board asks for, in the order you will run into it.
A homeowner can put in a standard or basic system on their own property with no hired help.
Idaho license types for septic system work
Idaho splits the work into 2 licenses. Pick the one that matches the jobs you take, since working outside its scope is the same as working without one.
| License | What it covers |
|---|---|
| Basic installer | Standard individual systems not classed as complex |
| Complex installer | Pressure distribution, sand mounds, sand filters, lagoons, large soil absorption and other alternative systems |
Steps to get licensed in Idaho
- Pass the basic or complex installer exam with 70 percent.
- Pay the registration fee to your local public health district.
- Get a surety bond: $10,000 basic or $30,000 complex.
- Renew by January 1 each year and take a refresher course every three years.
Experience and other requirements
Experience. The official pages we read do not say. Check with the board (official site).
The license to apply for. Basic or complex installer's registration permit.
Idaho septic installer exams
Trade exam. The basic or complex installer exam, passed with 70 percent, in person at your health district or online through NOWRA.
Business and law exam. The official pages we read do not say. Check with the board (official site).
What it costs in Idaho
We could not confirm the current fee schedule on an official page. Check with the board before you budget: Idaho Department of Environmental Quality, with the seven public health districts.
Insurance and bond
Insurance. The official pages we read do not say. Check with the board (official site).
Bond. A surety bond of $10,000 for a basic installer or $30,000 for a complex installer.
Renewal and licenses from other states
Renewal. Every year. Permits expire January 1. Installers also take an approved refresher course every three years.
Reciprocity. The official pages we read do not say. Check with the board (official site).
After you are licensed
The license lets you take the work. Getting the work is the next job.
- Register the business. If you work under a name other than your own, register it where your state asks (often the Secretary of State, sometimes the county), and keep the name the same on your license, your truck and your invoices.
- Claim your Google Business Profile. It is the listing people see when they search for septic installation near them. Fill in your service area, hours and real photos of your work.
- Put up a website that shows the license. Customers look for it before they call. Koira builds a contractor website for you and keeps it current.
- See where you stand. The free Koira report checks how your business shows up in search and on maps against shops near you.
Where this comes from
Every fact on this page comes from the Idaho Department of Environmental Quality, with the seven public health districts and the official pages below, checked October 9, 2026. Fees and rules change, so confirm with the board before you file.