Building permits, zoning and septic rules in Calhoun County, Michigan

At a glance

Building permit

Required before construction; identify the enforcing agency for the parcel¹

Zoning

Varies by local government; the county reviews township ordinances²

Septic permit

Required before construction where public sewer is unavailable⁴

Well permit

Required from the county Health Department before construction⁵

Owner-builder

A licensing exemption is available for a home built for the owner's own use and occupancy⁶

RV or tiny-home living

Set locally; Marshall Township bars permanent RV living, so ask the parcel's township⁷⁸

Soils rated favorable for a standard septic field

Only about 5% of the county's soils⁹

Off-grid sanitation

When public sewer is unavailable, sanitation needs a county-approved disposal method¹⁰

Who to call

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Do you need a building permit in Calhoun County, Michigan?

Yes. Before construction of a building or structure in Calhoun County, the owner or the owner's representative must apply in writing to the appropriate enforcing agency¹. A permit is also required for a change in use or occupancy, while ordinary repairs are exempt only within the rule's limits¹. The Michigan Building Code governs construction and related work, while one- and two-family dwellings fall under the Michigan Residential Code¹¹. The parcel's enforcing agency may be the state, county or local government¹. Permitted construction is periodically inspected by the permit issuer; where the state has enforcement authority, Michigan’s Building Section performs inspections and issues certificates of occupancy¹²¹³¹⁴. A new or altered building may not be occupied until the code official issues a certificate of occupancy¹⁵. Michigan's owner-builder licensing exemption does not waive applicable permits, inspections, codes, zoning or utility requirements⁶.

Who issues building permits in Calhoun County, and how do you reach them?

The correct building-code enforcing agency depends on the property because Michigan assigns enforcement to the appropriate state, county or local agency¹. Start with the municipality or township where the parcel lies and ask who accepts its building-permit application. Marshall Township is one local example: permit questions go to 269-781-7976 at 13551 15 Mile Road, Marshall, MI 49068¹⁶. Marshall Township publishes applications for zoning, building and plan examination, mechanical, electrical, plumbing and sign permits, with processing after payment is received¹⁷. Those forms and procedures are specific to Marshall Township¹⁷. County Environmental Public Health applications, service requests and current well-and-septic fees use the county portal, and septic installers must register before starting installation¹⁸. Health-department permit and service fees follow its fee schedule, so check the portal for current amounts¹⁹.

Does Calhoun County have zoning, and what does it mean for your land?

Zoning for unincorporated Calhoun County varies by township, so ask the parcel’s township for its zoning district and ordinance². The Calhoun County Planning Commission keeps local plans and ordinances and reviews township amendments; we could not confirm a single countywide zoning-district map or ordinance²⁰². In Marshall Township, minimum gross floor area is 800 square feet in AG, R-1 and R-2 districts and 600 square feet in R-3, which also has a 700-square-foot minimum average²¹. Marshall Township lot-area requirements vary by district and sewer or septic service²². These township standards do not establish rules elsewhere in Calhoun County². The Village of Union City, mainly in Branch County but extending into Calhoun County, sets its own zoning; village septic-tank construction or use also requires a Village Clerk permit²³²⁴. For rural systems without municipal service, Calhoun County Environmental Public Health handles septic permits³. The sanitation code’s agricultural exemption covers only the pre-sale soil-and-water evaluation for property sold and used solely for dairy, grazing or crops²⁵.

How do septic permits work in Calhoun County?

The Calhoun County Environmental Public Health Department administers private septic permits³. Where public sewer is unavailable, a municipality or township may not issue a building permit or allow construction to begin until the Health Officer has issued the private sewage-disposal permit⁴. Ask the township about municipal service before applying³. County sanitarians evaluate sites, help locate and design systems, issue septic permits and inspect completed work²⁶²⁷. A new or replacement system may not be backfilled until the county inspection is complete and approval is granted²⁸. Current fees follow the Health Department fee schedule¹⁹. Only about 5% of Calhoun County soils lack severe limits for a conventional drain field, making an early site evaluation especially useful⁹. Fill for a new onsite sewage system is not allowed in a designated wetland or floodplain²⁹.

Can you live in an RV or tiny home on your land in Calhoun County?

RV rules are local. In Marshall Township's residential districts, an RV on a lot with an occupied residence may not have permanent fixed connections to electricity, water, gas or sewer and may not be used for permanent living; temporary driveway living is limited to 21 days, no more than two times per calendar year, with at least 30 days between stays, and permits are required⁷. Those Marshall Township limits do not apply elsewhere in the county. We could not confirm a countywide rule allowing residential or long-term RV use, temporary camping or tiny-home occupancy in Calhoun County. Ask the zoning office for the parcel's municipality or township before placing or occupying any of them because land-use rules vary locally². Michigan guidance for tiny houses used as resort cabins says local zoning, building, electrical and plumbing approvals still apply³⁰. Marshall Township's dwelling-size standards show why the exact district matters, but those standards do not answer the question elsewhere in Calhoun County²¹. Sanitation also needs an approved plan: where public sewer is unavailable, facilities that receive or carry sewage must connect to a sewage-disposal system or another method approved by the Health Officer¹⁰. Where public sewer crosses, adjoins or abuts the property, a habitable building must connect³¹.

Building a home in Calhoun County: the steps, in order

1. Identify the parcel's municipality or township and confirm its zoning district, allowed use and dimensional standards².
2. Ask which state, county or local enforcing agency accepts the written building-permit application¹.
3. Check municipal sewer and water availability with the township before applying for county well or septic permits³. Where sewer is unavailable, obtain the septic permit before construction begins; obtain the well permit before well construction⁴⁵.
4. If the driveway enters a state trunkline highway, obtain the Michigan Department of Transportation driveway permit³².
5. Submit the required plans and build under the Michigan Building Code or Michigan Residential Code, as applicable¹¹.
6. Leave the septic system uncovered until county inspection and approval, schedule building inspections with the permit issuer, and obtain the certificate of occupancy before using a new or altered building²⁸¹²¹⁵.

What to check before you buy land in Calhoun County

Start with wastewater feasibility: only about 5% of Calhoun County soils lack severe limits for a conventional drain field, so obtain the county's site evaluation before relying on a homesite⁹. Confirm whether public sewer adjoins the property because connection may be required³¹. For a private water supply, a county well permit is required before construction⁵. Land divisions and subdivision developments without municipal water require a test well; subdivision or site-condominium projects also need engineered plans for Health Department review³³³⁴. Check the road owner before planning access because a driveway entering a Michigan state trunkline requires a state permit³². Michigan requires a permit for certain work in a regulated river, stream or drain floodplain, prohibits new homes in the floodway and also requires compliance with local rules³⁵.

Watch-outs

• The Calhoun County Planning Commission released a draft county comprehensive plan for public and intergovernmental review, with the review period ending October 14, 2026; check with the Office of Community Development for its current status if you are researching land-use plans now³⁶.
• Do not assume Marshall Township's forms or procedures apply elsewhere; its published process is township-specific¹⁷.
• In Marshall Township residential districts, the RV rule applies to lots with an occupied residence and bars permanent RV living; do not rely on it to authorize living on vacant land while building⁷. Ask the parcel’s township about RV or tiny-home occupancy and dimensional requirements elsewhere in Calhoun County².
• A driveway entering a state trunkline needs a Michigan Department of Transportation permit, while requirements for access from county or local roads could not be confirmed³².

Sources

1. Building Permit Information, quoted and re-checked
2. Calhoun County Planning Commission 2023 Annual Report, quoted and re-checked
3. Well & Septic, quoted and re-checked
4. Calhoun County Sanitation Code, quoted and re-checked
5. Calhoun County Sanitation Code, quoted and re-checked
6. Frequently Asked Questions – Residential Builder (Michigan statewide rule), quoted and re-checked
7. Marshall Township Zoning Ordinance — Recreational Vehicle Parking, quoted and re-checked
8. Calhoun County Planning Commission 2023 Annual Report, quoted and re-checked
9. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
10. Calhoun County Sanitation Code, quoted and re-checked
11. Building Permit Information, quoted and re-checked
12. MCL 125.1512, Inspection of construction (Michigan statewide rule), quoted and re-checked
13. Building Section, quoted and re-checked
14. Building Section, quoted and re-checked
15. Certificate of Occupancy Request (Michigan statewide rule), quoted and re-checked
16. Marshall Township (Calhoun County) - example township building department (marshalltownship.org)
17. Permits, Applications, & Inspections — Marshall Township, quoted and re-checked
18. Well & Septic, quoted and re-checked
19. Calhoun County Sanitation Code, quoted and re-checked
20. Calhoun County Planning Commission 2023 Annual Report, quoted and re-checked
21. Marshall Township Zoning Ordinance, quoted and re-checked
22. Marshall Township Zoning Ordinance, quoted and re-checked
23. Village of Union City: § 152.01 Zoning Regulations Adopted by Reference (Calhoun County), quoted and re-checked
24. Village of Union City: § 50.40 Permit Required (Calhoun County), quoted and re-checked
25. Calhoun County Sanitation Code, quoted and re-checked
26. Well & Septic, quoted and re-checked
27. Well & Septic, quoted and re-checked
28. Calhoun County Sanitation Code, quoted and re-checked
29. calhouncountymi.gov, quoted and re-checked
30. michigan.gov (Michigan statewide rule), quoted and re-checked
31. Calhoun County Sanitation Code, quoted and re-checked
32. Infrastructure permits (Michigan statewide rule), quoted and re-checked
33. Calhoun County Sanitation Code, quoted and re-checked
34. Calhoun County Sanitation Code, quoted and re-checked
35. Floodplains (Michigan statewide rule), quoted and re-checked
36. Calhoun County Office of Community Development / County Planning Commission (calhouncountymi.gov)

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.