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Licensed Installers and Self Installers

Septic installers working in Flathead County must be licensed through the Flathead City-County Health Department. This page explains how to get and renew that license.

If you are a homeowner planning to install your own septic system, contact Environmental Health at (406) 751-8130 to ask about the self-installer process.

Becoming a Licensed Installer

All septic installers must be licensed through the County. This license is obtained by passing a written test administered by the Flathead City-County Health Department. The fee for this test is $120 and must be scheduled 48 hours in advance. A yearly $65 renewal fee is required to maintain this license.

The test is open book, and you will be provided a copy of the septic regulations and construction standards to reference at the time of the test.

Please Note

  • Septic systems must be installed exactly as described on the septic permit. Any desired changes must be approved by the department prior to installation and final inspection.
  • Installers ready to schedule a septic final inspection: please call our office at (406) 751-8130 to speak with the front desk.
  • The Self-Installer or Licensed-Installer must be present at the time of the final inspection. Additionally, if the system is engineered, the engineer must also be present and will be responsible for producing final as-built drawings.

Licensure Fees

Septic installer licensure fees
Type of Fee Fee Amount
New Contractor/Designer Licensure $120
Contractor/Design Licensure Renewal (annual)

$65
Self Installer Licensure (valid for 1 year)

$100

Forms & Reference Documents
(Quick Links)

Location

40 11th St W
Suite 210
Kalispell, MT 59901

Mailing Address

1035 1st Ave W
Kalispell, MT 59901

Contact Info

+1 (406) 751-8130

Email Us

+1 (406) 751-8131

Page Last Updated: Jul 24, 2026