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

Seneca Township’s own rules

• Local zoningPresent

  Land inside Seneca township's limits, under the Seneca Township Zoning Ordinance

  • Source is a third-party copy of the ordinance hosted on energyzoning.org, not the township's own website. Confirm against the township's official copy and its amendment history before relying on it.
  • The copy is titled as a combined zoning, dangerous structure and nuisance ordinance and cites the Township Zoning Act (Act 184) in its preamble.

  “this ordinance shall be known and may be cited as the seneca township zoning ordinance.”

• Zoning districtsPublished

  Land inside Seneca township's limits

  • Districts are listed as: A agriculture, R residential, C commercial, M mobile home park, I industrial, X extractive industrial; commercial and extractive districts are described as floating.
  • Source is a third-party copy; confirm the official zoning map against the township.

  “the township of seneca is hereby divided into zones or districts as shown on the official zoning map and shall include the following: abbreviation districts a agriculture r residential c commercial m mobile home park i industrial x extractive industrial”

• Minimum dwelling sizeSpecified

  Dwelling units under the Section 4.25 mobile home minimum residential requirements in Seneca township

  • Floor area is measured from the exterior faces of exterior walls and excludes basements, unfinished attics, attached garages, breezeways, and enclosed and unenclosed porches.
  • Minimum floor-to-ceiling height of the dwelling is 7.5 feet.
  • Section 4.25 is titled mobile home minimum residential requirements; confirm whether it applies to all single-family dwellings or only to mobile homes.

  minimum floor area per dwelling unit: >= 850 square feet

  “minimum floor area of a dwelling unit shall be eight hundred fifty (850) square feet.”

• SetbacksSpecified

  Land abutting bean creek, other creeks or tributaries, drainage ditches, and natural or man-made lakes inside Seneca township

  • Waterfront setbacks: fifteen feet from a drainage ditch, twenty-five feet from a creek or tributary, fifty feet from Bean Creek, and fifty feet from a natural or man-made lake, measured from the water's edge.
  • Other uses not otherwise covered must be set back one hundred feet from the water's edge.
  • Tile fields must be kept outside the 50-foot distance and their bottoms must be four feet above the flood plain level, per the same section.

  setback from natural or man-made lake: >= 50 feet · setback from Bean Creek: >= 50 feet · setback from creek or tributary: >= 25 feet · setback from drainage ditch: >= 15 feet

  “the general setback limitations shall be based on the following minimum distances from the waters' edge: a. fifteen (15) feet from any drainage ditch. b. twenty-five (25) feet from any creek or tributary. c. fifty (50) feet from bean creek. d. fifty (50) feet from any natural or man-made lake.”

• Living in an RVLimited

  Parking or storage of recreational vehicles, campers and camper trailers in residential districts inside Seneca township

  • Prohibited for more than 72 hours in all residential districts except where other provisions of the ordinance expressly permit it, unless the minimum conditions are met.
  • Vehicles must be placed behind the front face of the principal building.
  • Storage or parking must be on a lot with an inhabited dwelling unit.
  • This rule governs storage and parking; it does not state whether an RV may be lived in.

  maximum storage or parking period without conditions: <= 72 hours (except where expressly permitted by other provisions of this ordinance)

  “shall be prohibited for a period greater than seventy-two (72) hours in all residential districts, except where expressly permitted by other provisions of this ordinance, unless the following minimum conditions are met:”

• Manufactured homesLimited

  Mobile or manufactured homes used as dwellings on lots inside Seneca township, under the Section 4.25 residential requirements

  • Minimum floor area of 850 square feet and 7.5-foot floor-to-ceiling height.
  • Connect to central water and sanitary sewer if available.
  • On-site septic systems must be approved by the county health department.
  • Mobile home parks are a separate district (M).

  “if central water and sanitary sewage facilities are available; the dwelling shall be connected to said facilities. on-site septic systems shall be approved by the county health department.”

• Accessory dwellingsProhibited

  Garages and accessory buildings inside Seneca township

  • Basement or cellar apartments may not be used for dwelling purposes for more than one year unless a conventional story is above them used as a dwelling (Section 4.05).

  “buildings erected after the effective date of this ordinance as garages or accessory buildings, shall not be occupied for dwelling purposes.”

• Mandatory utility hookupConditional

  Dwellings inside Seneca township under Section 4.25 when central water and sanitary sewer are available

  • Connection is required only where central water and sanitary sewage facilities are available; no distance threshold is stated in the excerpt.
  • Where not available, on-site septic must be approved by the county health department.

  “if central water and sanitary sewage facilities are available; the dwelling shall be connected to said facilities.”

• Subdividing landRegulated (with conditions)

  Proposed plats of new or redesigned subdivisions inside Seneca township

  • Plats must conform to the Michigan plat act and any related township ordinance.
  • Lots must equal or exceed the minimum size and width of the district in which they lie.

  “no proposed plat of a new or redesigned subdivision shall hereafter be approved by the township unless the lots within such plat equal or exceed the minimum size and width requirements set forth in the various districts of this ordinance”

Rules another office applies inside Seneca Township

Seneca Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

• Who permits septicCounty (with conditions)

  On-site septic systems serving dwellings inside Seneca township (the county health department approves them)

  • Stated in the township ordinance; the county health department is the approving body. The county scope is countywide because the county geography enum does not allow township-specific.
  • Health department service area inside Seneca township was not separately confirmed.

  “on-site septic systems shall be approved by the county health department.”

• Septic permitRequired

  On-site septic systems serving dwellings inside Seneca township

  • Approval by the county health department is required under the township ordinance; the excerpt does not name a permit form or fee.
  • Applies where central sewer is not available.

  “on-site septic systems shall be approved by the county health department.”

Still unanswered

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

• Building permit — General building permits for new dwellings inside Seneca township
• Owner-builder exemption — Owner-builder exemption for residential construction inside Seneca township
• Building code adopted — Adoption of the Michigan residential or construction code in Seneca township
• Inspections — Building inspections for new dwellings inside Seneca township
• Certificate of occupancy — Certificates of occupancy for new dwellings inside Seneca township

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.