Building permits, zoning and septic rules in St. Joseph County, Michigan

A St. Joseph County property owner must apply for a building permit before constructing a building or structure, and a permit is also required when a structure's use or occupancy changes¹. Ordinary repairs may be exempt, but that exception does not cover work that crosses the cited structural, egress, utility, public-health or safety limits¹. Michigan’s Building Code governs applicable construction in St. Joseph County; residential requirements are in the Michigan Residential Code^1,8. Michigan's owner-builder exemption allows an individual to build on the individual's own property for personal use and occupancy, but it is a builder-licensing exemption—not an exemption from the building permit⁵. A new or altered building cannot be used or occupied until the code official issues a Certificate of Occupancy after completion, final permits and payment of fees⁶.

Start with Michigan LARA’s Statewide Jurisdiction List to identify the enforcing agency for the St. Joseph County parcel¹. Sturgis handles building permits and plan reviews through Community Development⁹. White Pigeon Township issues building permits only after a zoning inspection¹⁰. Septic and well permits remain with the Branch-Hillsdale-St. Joseph Community Health Agency¹¹. In Park Township, call the Building Official at 269-816-4951¹². LARA publishes a building-permit fee schedule and offers online application and permit checks through its portal; confirm the parcel’s enforcing agency before using the state route¹.

In unincorporated St. Joseph County, ask the township about parcel-level zoning; incorporated cities and villages make their own land-use decisions, while county planning is advisory². Sturgis, Three Rivers and Village of Constantine have their own zoning^9,13,14. Onsite septic and well permitting stays with the Branch-Hillsdale-St. Joseph Community Health Agency¹¹. For Park Township zoning questions, call (269) 386-1110¹². In Leonidas Township’s A-1 district, the listed minimum dwelling floor area is 900 square feet and minimum lot area is 1 acre; other districts and dwelling types have different requirements¹⁵. Ask the parcel’s zoning office about setbacks and accessory dwellings before designing.

The Branch-Hillsdale-St. Joseph Community Health Agency administers onsite sewage permitting in St. Joseph County³. An onsite septic system requires a septic permit; BHSJ accepts online or paper applications^3,11. The agency also requires a permit before an onsite water-supply well is installed⁴. For a new building served by septic, health-agency approval must come before the local construction permit; an application may require site maps, soil analysis, test borings, groundwater and flood elevations, nearby wells and detailed system plans¹⁶. Septic and well permits stay with the health agency even where a city, village or township issues the building permit¹¹. The schedule effective April 1, 2023 lists $235 for residential septic and $215 for a residential well; confirm current charges with BHSJ⁷. Only about 3.1% of county soils have no severe limitation for a conventional drain field, so settle septic feasibility early¹⁷.

Michigan treats a tiny house as distinct from a recreational vehicle even when the tiny house is built on wheels¹⁸. A tiny house needs zoning, building, electrical and plumbing permits and final approvals from the authorities serving the parcel, plus health-department approval for a well or septic system when applicable¹⁸. St. Joseph County's cities, villages and townships make parcel-level land-use decisions, so ask the applicable local zoning office whether its ordinance permits the proposed use². In Leonidas Township, occupying a travel trailer, motor home or camper for more than 24 hours is prohibited unless the use is permitted or approved as a special exception; the zoning administrator may issue a temporary permit for no more than 10 days¹⁵. We could not confirm a countywide RV-occupancy rule; ask the parcel’s township, city or village zoning office about living in an RV while building.

1. Identify the township, city or village containing the parcel, then confirm the state or local enforcing agency assigned to issue its building permits¹.
2. Ask the applicable zoning office which district covers the parcel and whether the proposed home and accessory uses are allowed².
3. Apply to the health agency first if the project needs septic service; septic approval must precede the construction permit for a new building served by an onsite system¹⁶.
4. Obtain the required well permit before installing an onsite water-supply system⁴.
5. Submit the building-permit application with construction documents; the building official may waive those documents when the application description is enough to determine compliance¹.
6. Arrange the enforcing agency's required periodic inspections as permitted construction proceeds¹⁹.
7. Submit a written request for the Certificate of Occupancy after completing the work, finalizing permits and paying fees⁶.

Confirm the parcel's local jurisdiction and zoning district before buying because zoning and permit administration vary across St. Joseph County^1,2. Test septic feasibility early: only about 3.1% of county soils have no severe limitation for a conventional drain field, and the health agency may require soil analysis, test borings, groundwater and flood elevations, and nearby-well information^16,17. If planned non-agricultural earth changes cover one acre or more within 500 feet of a watercourse or lake, contact the Drain Commissioner about soil-erosion oversight²⁰. A driveway connecting to a state trunkline requires an MDOT permit in addition to the local building permit²¹. Ask EGLE about regulated river, stream or drain floodplains before planning construction or fill; new residential construction is prohibited in the floodway²².