Zoning, building permits and septic rules in Mill Township, Indiana

Rules another office applies inside Mill Township

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

• Building permitRequired

  Improvement location and building permits for construction on unincorporated land inside Mill township; issued by the Grant County Area Plan office

  • Gas City issues its own permits in the south of Mill township and the Area Plan states that the cities of Marion and Gas City issue their own permits.
  • Construction may proceed only after the improvement location or building permit is issued.

  “issue and maintain improvement location and building permits (the cities of marion and gas city issue their own permits)”

• InspectionsRequired

  Inspections of projects with permits issued by the Grant County Area Plan office on unincorporated land inside Mill township

  • Applies to projects permitted by the county; Gas City and Marion inspect their own permitted projects.

  “inspect projects associated with all permits issued according to current local and state building codes.”

• Local zoningVaries (with conditions)

  Land inside Mill township outside the limits of Gas City and Marion: the Grant County Area Wide Zoning Ordinance, administered by the Grant County Area Plan office, applies to unincorporated Grant County

  • Gas City occupies the south three-quarters of Mill township and issues its own permits; the city's own zoning rules govern inside its limits and are not covered here.
  • Area Plan jurisdiction is stated for unincorporated Grant County; the Area Plan page does not state the zoning district for any given parcel.
  • The county zoning statement is a recital in a draft solar amendment (Draft 8 v2, plan commission recommendation dated 1/6/25); the adopted ordinance text was not opened.

  “area plan has planning jurisdiction over the communities of: jonesboro fairmount matthews upland van buren sweetser unincorporated grant county”

• Who permits septicCounty (with conditions)

  Residential onsite septic systems for dwellings in Mill township (applies inside Mill township under the county health department program)

  • The state rule (Indiana Administrative Code, as quoted by the county) sets the required system type; the county health department issues permits and reviews plans.

  “you will need a septic permit, issued by the grant county health department, prior to repairing, replacing, constructing, or otherwise altering your septic system.”

• Septic permitRequired

  New construction, replacement, or repair of a residential septic system for a dwelling inside Mill township

  • The portion of plumbing 2 feet outside the foundation is considered part of the septic system, so repairs or replacements beyond that point require a permit.
  • Permit requires an application and a soil analysis by a certified soil scientist, then contractor plan submittal and health department plan approval before the permit is issued.
  • Permit fees are listed as parameters; the FAQ does not state a fee effective date.

  septic permit fee, new construction: 150 USD · septic permit fee, replacement system: 125 USD · septic permit fee, repair: 50 USD

  “the portion of your plumbing that is 2 feet outside of your foundation is considered part of your septic system; therefore any repair or replacement beyond this point will require a septic permit.”

• Subdividing landRegulated (with conditions)

  Subdivision of land on unincorporated land inside Mill township, under the Grant County Subdivision Ordinance administered by the Area Plan office

  • Gas City and Marion regulate subdivisions inside their own limits; not covered here.
  • Subdivision petitions are taken by the Area Plan office.

  “enforce ordinances including the zoning and subdivision ordinances”

• Permit feesPublished (with conditions)

  Septic permit fees for dwellings inside Mill township, published by the Grant County Health Department

  • Covers septic permits only; building and improvement location permit fees were not established.

  septic permit fee, new construction: 150 USD · septic permit fee, replacement system: 125 USD · septic permit fee, repair: 50 USD

  “permits for new construction are $150. permits for replacement systems are $125.”

• Permit processPartial

  Septic permit process for dwellings inside Mill township; building permit process not established

  • The FAQ covers septic steps only; the building permit application process is not described on the opened pages.

  “you must fill out an application and get a soil analysis completed.”

Still unanswered

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

• Owner-builder exemption — Owner-builder exemption for a homeowner building on their own land in Mill township
• Building code adopted — Which residential building code applies to construction inside Mill township
• Certificate of occupancy — Certificate of occupancy for a new dwelling inside Mill township
• Minimum dwelling size — Minimum dwelling size for residential construction inside Mill township
• Minimum lot size — Minimum lot size for a residence inside Mill township, including the main single-family residential district and any agricultural or rural-residential district

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.