Septic System Installation in Minnesota

Septic system installation in Minnesota

Building a home or replacing an old system? Find licensed businesses in your county and call them directly. Not sure who to call? Tell us about the job and we pass it to one with a current MPCA license.

1,013 licensed installers in MPCA records

Call any of them directly

No business pays to be listed

Not sure who to call? We can find one for you, free

Listings checked on Nov 3, 2026

Not sure who to call?

Tell us about the job and we'll pass it to one licensed septic business that serves your area. Free, for new systems, replacements, repairs and inspections.

Within one business day we pass your request to one septic business with a current MPCA license.

They contact you by phone, text or email to set up an estimate.

You decide. Free, no obligation.

Project

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By sending this, you agree we can share your request with one licensed septic business, who will contact you by phone, text or email about your project. Free, no obligation. Privacy

How a new septic system gets built

Design. A licensed designer studies the soil on your lot (people often call this a perc test) and designs a system that fits it.
Permit. Your county, city or township reviews the design and issues the permit.
Installation. A licensed installer builds the system. Many businesses hold both design and installer licenses.
Inspection. State law requires a compliance inspection of every new or replacement system. It is done by the local government or a licensed inspector who is independent of the owner and the installer. A passing system gets a certificate of compliance, good for five years.

Mound or trench?

A conventional system sends treated water from the tank into trenches in the ground. Where the soil is tight, bedrock is shallow or groundwater sits close to the surface, the system has to be built up above the ground instead. That is a mound, and it costs more.

Conventional system: $5,575 to $8,000 in the Minneapolis area, average $6,614 (Angi).

Mound system: $10,000 to $20,000 (Angi).

Aerobic system: $10,000 to $20,000 (Angi).

Before you sign

Check the license on MPCA's search. Search MPCA licenses

Ask who pulls the permit and make sure it is in the price.

Get it in writing: the design, tank size, materials, start date, payment schedule and what happens to your yard.

Hold back the final payment until the system passes its compliance inspection.

How it works

Browse licensed businesses

Every septic business based in your county with a current MPCA license, in alphabetical order.

Compare and check the license

See what each one is licensed to do and when the license runs out. Confirm it on MPCA's search.

Contact them directly

Call the number from their license record. Not sure who to call? Tell us about the job and we pass it to one licensed business.

Questions

How much does a new septic system cost in Minnesota?

Angi puts a conventional system in the Minneapolis area at $5,575 to $8,000. Mound and aerobic systems run $10,000 to $20,000. Your soil decides which one you need.

Do I need a permit for a new septic system?

Yes. Septic permits come from your county, or in some places your city or township. Your designer or installer usually handles it.

Who inspects a new septic system?

Your local government or a licensed inspector who does not work for you or the installer. State law requires a compliance inspection for every new or replacement system.

Why does my lot need a mound?

When the soil is too tight, bedrock is shallow or groundwater is close to the surface, there is not enough good soil to treat the water. A mound adds that soil above ground.