St. Clair County, Michigan
Yale is a city in St. Clair County, Michigan. Yale adopts its own zoning, so inside its limits Yale’s rules apply, not the county’s. Septic permits inside Yale come from St. Clair County (St. Clair County Health Department - Environmental Health Division · (810) 987-5306). 14 rules below are quoted from official sources and independently re-checked, most recently on November 4, 2026. Rules for unincorporated land are on the St. Clair County page.
Factory-built single-family dwellings brought into Yale city.
“All such dwelling units must meet the current construction standards of the State of Michigan and the City of Yale prior to being brought into the City and prior to issuance of a building permit.”
Mechanical-code enforcement inside Yale city limits.
“Pursuant to the provisions of the Michigan Mechanical Code, in accordance with Act 230 of the Public Acts of 1972, the mechanical official of the City of Yale is hereby designated as the enforcing agency”
Mobile homes subject to Yale Zoning Ordinance § 16.20.
“All wheels, axles and towing apparatus must be removed from a mobile home prior to issuance of a certificate of occupancy.”
Land inside the incorporated City of Yale, St. Clair County, Michigan.
“This Ordinance shall be known and may be cited as the “City of Yale Zoning Ordinance.””
Single-family dwellings in Yale zoning districts.
minimum first-floor area: >= 600 square feet (Dwelling with one and one-half or more stories.)
“Each dwelling with one and one-half (1-1/2) or more stories shall have a minimum first floor area of not less than six hundred (600) square feet.”
Lots in Yale zoning districts.
“EXCEPT as otherwise specifically provided in this Ordinance, no lot shall be smaller than the minimum size specified below; nor less than the minimum width specified below;”
Structures in Yale zoning districts.
minimum rear-or-side distance for accessory building: >= 5 feet (Where located within a residential district; see cited provision for other accessory-building rules.)
“no structure shall be erected or maintained between any lot line and the pertinent setback distance listed below”
Buildings and structures on lots in Yale zoning districts.
“nor shall the buildings or structures on any lot occupy a greater percentage of the lot than the maximum specified below.”
Buildings in Yale zoning districts.
“no building shall be erected or maintained which exceeds the height limit specified below.”
Travel trailers, motor homes, and similar enclosures used as dwellings inside Yale city.
maximum occupancy period: <= 30 days (Only within an approved and licensed campground or other overnight camping facility.)
“A tent, travel trailer, motor home or similar enclosure maybe occupied for periods up to thirty (30) days only within an approved and licensed campground or other overnight camping facility.”
Tent, camper, travel-trailer, and similar recreational-vehicle camping inside Yale city.
minimum campground site: >= 20 acres (R-2 district.) · maximum same-site occupancy: <= 30 days (Individual tent or recreational vehicle in any campground.)
“Campgrounds and overnight camping parks for tents, campers, travel trailers, and similar recreational vehicles may be permitted on a minimum site of twenty (20) acres in the R-2 district, subject to the following:”
One accessory apartment per single-family dwelling in Yale R-1, R-2, and R-3 districts.
minimum accessory-apartment area: >= 550 square feet · maximum accessory-apartment area: <= 700 square feet · maximum bedrooms: <= 2
“One (1) accessory apartment per single family dwelling unit may be permitted in R-l, R-2 and R-3 districts subject to the following:”
Dwellings erected, altered, or moved inside Yale city.
“Every dwelling hereafter erected, altered or moved shall be connected to a public sanitary sewer or to a private sewage disposal system approved by the St. Clair County Health Department.”
Yale does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Private sewage disposal systems serving dwellings inside Yale city.
“Every dwelling hereafter erected, altered or moved shall be connected to a public sanitary sewer or to a private sewage disposal system approved by the St. Clair County Health Department.”
We looked and could not find an official answer yet. Silence is not permission; ask Yale or St. Clair County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Yale publishes no rule on the point, not that none exists. St. Clair County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Yale means bringing your own water and power. The kit we’d start with:
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