Bolthole Index

Sanilac County, Michigan

Zoning, building permits and septic rules in Flynn Township, Michigan

Flynn Township is a township in Sanilac County, Michigan. Flynn Township adopts its own zoning, so inside its limits Flynn Township’s rules apply, not the county’s. 15 rules below are quoted from official sources and independently re-checked, most recently on October 30, 2026. Rules for unincorporated land are on the Sanilac County page.

Answers from the rulebook for Flynn Township

Flynn Township’s own rules

  • Building permitRequired

    Zoning land use permit from the Flynn township zoning administrator before erecting, constructing, placing, moving or altering any building or structure in the township. Only the township land use permit is established here; separate state or county building permits were not checked.

    • Permit issued by the zoning administrator; the parcel number is required for approval (township forms page).
    • Construction may proceed only after the land use permit is obtained.
    “a land use permit must be acquired from the zoning administrator before any building or structure is erected, constructed, placed, moved or altered or the use of any land, structure, or building changed in the township.”
  • Local zoningPresent (with conditions)

    Land in unincorporated Flynn township, Sanilac County, Michigan

    • Zoning applies by district; uses are principal, special exception (zoning board approval under article XV) or prohibited unless listed.
    • Ordinance text reads that it applies to 'the unincorporated portions of flynn township'.
    • Source is a third-party-hosted PDF copy of Ordinance No. 101; the township's own copy was not confirmed in this run.
    “for the establishment of zoning districts in the unincorporated portions of flynn township”
  • Zoning districtsPublished (with conditions)

    Zoning districts of unincorporated Flynn township (AR agricultural residential, R residential, C commercial, I industrial)

    • Uses not listed as principal or special exception uses are prohibited within a district (sec. 5.05).
    • The zoning map is listed in the ordinance table of contents; the map itself was not opened.
    “article vi (ar) agricultural residential district section 6.01. principal uses permitted. a. farms, farm buildings, and farm uses.”
  • Minimum dwelling sizeSpecified

    Dwellings in unincorporated Flynn township under the single family dwelling requirements (sec. 10.06)

    • Each dwelling also needs a basement, garage or storage building with at least 100 sq ft of storage and skirting of the space between the dwelling and ground.

    minimum width: >= 14 ft

    “b. minimum width. each dwelling shall be no less than fourteen (14) feet in width”
  • Minimum lot sizeDistrict specific (with conditions)

    Lots in the residential (R) district of unincorporated Flynn township

    • Read from the garbled area, setback and height table.
    • The R-district duplex/multiple-family special exception separately requires 2 acres for one dwelling structure plus 10,000 sq ft for each additional structure (sec. 7.02).

    minimum lot area per dwelling: >= 2 acre

    “ar 2 acre 250 100 25 25 900 (d) 35(e) r 2 acre 250 100 25 25 900 (d) 35”
    One more reviewed finding on this topic
  • SetbacksDistrict specific (with conditions)

    Principal buildings in the agricultural residential (AR) district of unincorporated Flynn township

    • Footnote (a) says front measured at the minimum front yard setback line; footnote (b) says 'measures from center of road right of way' (footnote placement in the front column not confirmed from the garbled table).

    minimum front yard setback: >= 100 ft (footnote (b)) · minimum side yard setback: >= 25 ft · minimum rear yard setback: >= 25 ft

    “b) measures from center of road right of way. c) in no case shall a building be constructed within 100 feet of the centerline of any public or private road right of way.”
    One more reviewed finding on this topic
  • Building heightDistrict specific (with conditions)

    Buildings in the residential (R) district of unincorporated Flynn township

    • Footnote (e) is not legible in the text extraction and may qualify the limit.

    maximum building height: <= 35 ft (footnote (e) not legible)

    “ar 2 acre 250 100 25 25 900 (d) 35(e) r 2 acre 250 100 25 25 900 (d) 35”
  • Living in an RVLimited

    Occupancy of a recreational vehicle on a residential premises in unincorporated Flynn township

    • Limited to one recreational vehicle at a time, for guests or visitors.
    • Recreational vehicles include travel-trailers, motor homes and truck campers, but not mobile homes.
    • Single-family dwellings in the AR and R districts exclude recreation vehicles and motor homes as the dwelling use (sec. 6.01, sec. 7.01).

    maximum stay: <= 3 months

    “the owner or lessee of any premises may permit the temporary occupancy of one recreational vehicle for guests or visitors for a period not to exceed three (3) months in any calendar year.”
  • Camping on your landLimited

    Campgrounds in the agricultural residential (AR) district of unincorporated Flynn township

    • Listed as a special exception use, so zoning board approval is required under article XV.
    • Minimum size of ten (10) acres; development features must be located to minimize impacts (further requirements in sec. 6.02 not read).

    minimum campground size: >= 10 acres

    “private parks, recreation areas, campgrounds, and golf courses subject to the following requirements: 1. minimum size of ten (10) acres.”
  • Manufactured homesLimited

    Temporary occupancy of a mobile home on a parcel while a permanent dwelling is built in unincorporated Flynn township

    • Temporary mobile home permit; applicant posts a cash deposit of 10% of the value of the mobile home or $1,000, whichever is greater, with the township treasurer.
    • Mobile home parks are a special exception use in the R district (sec. 7.02) under article XV.
    “the applicant shall post a cash deposit of 10% of the value of the mobile home or $1,000, whichever is greater, with the township treasurer.”
  • Subdividing landRegulated (with conditions)

    Land divisions in Flynn township

    • Township Land Division Ordinance is listed on the township ordinances page; its text was not opened.
    • Applications go to the township assessor.
    “land division application submit to connie lipka, township assessor.”
  • Permit feesPublished (with conditions)

    Land use permit fees in Flynn township

    • Fee amounts are on a linked 'Rates & Fees' page that was not opened; amounts are not stated in this record.
    “land use permit application submit to cam keesler, zoning administrator, prior to starting your project. click here for rates & fees”
  • Permit processPartial

    Land use permit process in Flynn township

    • Application goes to the zoning administrator before starting the project; the parcel number is required for approval.
    • Building-code permit process is not covered by this claim.
    “the parcel number is required for the land use permit application to be approved.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Flynn Township or Sanilac County directly.

  • Owner-builder exemption — Owner-builder exemption for Flynn township construction
  • Building code adopted — Building code adoption for new construction in Flynn township
  • Inspections — Building inspections for new homes in Flynn township
  • Certificate of occupancy — Certificate of occupancy for new dwellings in Flynn township
  • Lot coverage — Lot coverage limits in Flynn township zoning districts
11 more unanswered
  • Tiny homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • Short-term rentals

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 Flynn Township publishes no rule on the point, not that none exists. Sanilac County’s page lists the county offices to call.

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