Installing or replacing a septic system in Michigan: the county permit steps

How a county permit works, step by step

EGLE's guide says local health departments approve residential systems under 1,000 gallons a day under their sanitary code or the Michigan Criteria, whichever is more stringent. The Criteria add that construction of the building shall not begin until a permit for the sewage system has been obtained. Counties describe the sequence in similar terms, with local details:

1. Check first whether a public sewer is available. Genesee County asks owners to do this, and state law can require connection within 200 feet.
2. Get the soil evaluated. Livingston County wants two borings 50 feet apart and 8 feet or more deep after a MISS DIG ticket, and Macomb and Jackson counties run the soil evaluation first.
3. Apply with a plot plan. Wayne County asks for the 10-digit parcel ID and, for new construction, a survey and legal description, per its page; check the current form with the county.
4. Build under inspection. The Criteria say not to backfill treatment facilities until the agency approves, and Ottawa County requires a final inspection before anything is covered.
5. Get the final approval before anyone moves in, as Genesee County requires.

What septic installation costs in Michigan: fees and ranges we can cite

Our estimate for a new or replacement system is $6,025 to $20,200 per system, a model and not a quote, built from two published national ranges and Michigan's operating engineer wage ratio to the US (1.05); one of the two ranges is EGLE's own replacement range. The table pairs it with permit fees from the counties that publish them, and several of those bill the soil or site evaluation separately. Michigan has no statewide septic permit fee and no installation price list.

How we estimate costs: the Estimated range row is a model, not a quote. It takes two published national ranges for this job (a third-party cost guide that we have not verified and do not cite, and EGLE's published replacement range) and multiplies them by Michigan's operating engineer median wage ratio to the US (1.05, BLS 2025 data). No permit or evaluation fee is added: the county rows are shown as the schedules print them. The wage and fee rows are what workers are paid and what a county charges, and neither is a price you will be quoted. We have not collected Michigan septic quotes, and one company's published pumping price is not a range. Your tank, soil and site move a real quote outside any range, so get written quotes. Full method. Prices as of Oct 19, 2026.

What the state Criteria set for design

The 1994 Criteria call for a septic tank of at least 1,000 gallons regardless of flow, with 24 hours of retention at design flow and at least one 18-inch opening per compartment brought to the surface under a secure cover. Detailed plans must come from a registered professional engineer or sanitarian, and a project of $15,000 or more needs an engineer, though plans may be waived for small systems under that cost. Those are 1994-era figures, and counties set their own plan rules. Splitting land has its own state rule: R 560.401 and the rules after it require approval of on-site sewage disposal suitability for land divisions and subdivisions.

Who may install: county licenses, not a state license

We found no statewide septic installer license in Michigan, and SB 771 contains none. Counties fill the gap. Oakland County makes it unlawful to install without its license, which costs $50 for the class and exam and $100 a year. Genesee County licenses installers at $220 a year with a surety bond. Livingston County's license is $260 to start, and owners may install a conventional system for their own single or two-family home after passing a license exam. Saginaw County registers installers for $255 every three years. Eaton County requires installers to be certified only for certain technologies, not for conventional systems.

Winter limits and wet ground

Genesee County bars installing a septic field from December 15 to April 15 without the health department's written consent, and St. Clair County bars it from December 1 to March 1 without prior approval.

Paying for it

EGLE and Michigan Saves lend up to $50,000 for failing systems, with income-based Tier One loans of up to $30,000 at a fixed 1 percent. Loan-funded work must follow EGLE's minimum standards, including a watertight riser to grade. See the loan guide.

When a replacement cannot wait

Before you collect bids

1. Call the county health department and ask for its permit steps and current fee schedule.
2. Ask whether a sewer is available and whether your county licenses installers.
3. Ask each installer whether the bid includes the soil evaluation, the permit and the final inspection.

Permit authority and fees

The county or district health department issues the permit. Published fees for a new residential system range from $175 in Muskegon County, which includes the site evaluation, to $743 in Ottawa County, and several counties bill the soil or site evaluation separately. Doing the work without a permit costs double in Saginaw, Ottawa, St. Clair and Jackson counties.

A tool for this job

Questions people ask

Keep reading

Guides

• Septic versus sewer in Michigan: when connection is required
• Michigan Septic Replacement Loan Program: who qualifies and how it works
• Winter and spring septic care in Michigan: frozen ground, thaw and floods

Related services

• Septic repair
• Drain field
• Riser and lid

Michigan licensing, code and permit facts · Who licenses and permits septic work in Michigan · Report a wrong price or rule