Bolthole Index

LaSalle County, Illinois

Zoning, building permits and septic rules in Dayton Township, Illinois

Dayton Township is a township in LaSalle County, Illinois. Septic permits inside Dayton Township come from LaSalle County. 7 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the LaSalle County page.

Answers from the rulebook for Dayton Township

Dayton Township’s own rules

  • Building code adoptedAdopted (with conditions)

    Construction in the unincorporated portion of Dayton Township, if any, administered by LaSalle County.

    • The County page limits its statement to unincorporated areas of the County; it does not identify a code edition or establish coverage for incorporated land within the township.
    “The Department also oversees the Building Code inspections conducted by Safe Built. They are a private firm hired by LaSalle County to conduct inspections on construction taking place in the county to ensure compliance with locally adopted building codes.”
  • InspectionsLimited

    Construction in the unincorporated portion of Dayton Township, if any, administered by LaSalle County.

    • The County page describes inspections conducted by Safe Built but does not state every project or inspection stage that is mandatory.
    “The Department also oversees the Building Code inspections conducted by Safe Built. They are a private firm hired by LaSalle County to conduct inspections on construction taking place in the county to ensure compliance with locally adopted building codes.”
  • Who permits septicCounty (with conditions)

    Private sewage disposal systems inside Dayton Township.

    • The application requires an onsite survey by County Health Department personnel before construction permit issuance.
    “a permit for construction will not be issued until a completed application and fee have been submitted to the lasalle county health department and an onsite survey performed by department personnel.”
  • Septic permitRequired

    Construction of a private sewage disposal system inside Dayton Township.

    • Completed application, fee, and onsite survey by Department personnel are required before construction permit issuance.
    • The application identifies a $230 application fee and provides for its return if the permit is denied.

    private sewage disposal permit application fee: 230 USD (If a permit is denied, the fee shall be returned to the applicant.)

    “there is a two hundred thirty ($230.00) dollar application fee for a private sewage disposal system permit. if a permit is denied, the fee shall be returned to the applicant.”
  • Septic inspectionRequired

    Construction of a private sewage disposal system inside Dayton Township.

    • The Department must be notified before backfilling.
    “the health department must be notified for a final inspection sewage disposal system construction before backfilling.”
  • Permit feesPublished (with conditions)

    Private sewage disposal permits inside Dayton Township.

    • If the permit is denied, the septic application fee shall be returned to the applicant.
    • A service fee is assessed for credit- or debit-card payment.

    private sewage disposal permit application fee: 230 USD (Returned if the permit is denied.)

    “a service fee will be assessed when using a credit or debit card.”
  • Permit processPublished (with conditions)

    Private sewage disposal permits inside Dayton Township.

    • Submit a plat of survey, plot plan, soil-investigation report, completed application, and fee.
    • Department personnel must perform an onsite survey before construction permit issuance.
    “a. plat of survey: please submit a copy of your plat of survey, including the legal property description.”

Still unanswered

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

  • Building permit — Residential construction inside Dayton Township.
  • Owner-builder exemption — Owner-built residential construction inside Dayton Township.
  • Certificate of occupancy — Residential occupancy inside Dayton Township.
  • Minimum dwelling size — Residential dwellings inside Dayton Township.
  • Minimum lot size — Residential lots inside Dayton Township.
14 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • 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 Dayton Township publishes no rule on the point, not that none exists. LaSalle County’s page lists the county offices to call.

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