Bolthole Index

DeKalb County, Illinois

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

Mayfield Township is a township in DeKalb County, Illinois. Mayfield Township adopts its own zoning, so inside its limits Mayfield Township’s rules apply, not the county’s. Septic permits inside Mayfield Township come from DeKalb County (DeKalb County Health Department, Environmental Health Division). 5 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the DeKalb County page.

Answers from the rulebook for Mayfield Township

Mayfield Township’s own rules

  • Local zoningPresent (with conditions)

    The identified property at 25330 Five Points Road in unincorporated Mayfield Township; the applicable zoning rule-maker is DeKalb County, not the township.

    • Evidence confirms county zoning for this identified unincorporated Mayfield Township property; broader district controls require parcel and zoning-map review.

    former zoning district: A-1 Agricultural District · current zoning district: PD-C Planned Development–Commercial

    “THE PLANNED DEVELOPMENT – COMMERCIAL DISTRICT LOCATED AT 25330 FIVE POINTS ROAD IN MAYFIELD TOWNSHIP”
  • Zoning districtsPartial

    The identified property at 25330 Five Points Road in unincorporated Mayfield Township.

    • This claim is parcel-specific evidence within Mayfield Township and is not a complete district inventory for the township.

    district: PD-C Planned Development–Commercial (25330 Five Points Road)

    “Planned Development – Commercial District”
  • Who permits septicCounty (with conditions)

    Private sewage disposal within Mayfield Township where no city, village, or incorporated town provides and enforces at-least-as-stringent rules.

    • The County chapter excludes cities, villages, and incorporated towns that provide and enforce rules at least as stringent as the chapter.
    “The DeKalb County Health Department’s representative shall be authorized to apply and enforce”
  • Subdividing landRegulated (with conditions)

    Subdivision proposals in unincorporated Mayfield Township, reviewed by DeKalb County.

    • Subdivision review and approval are under the County Planning, Zoning and Development Committee and County Board.
    “Subdivision review and approval is the jurisdiction”
  • Permit processPartial

    Construction subject to County building permits in unincorporated Mayfield Township.

    • Construction must begin within 180 days after permit issuance and be completed within 12 months after commencement.
    • At least one inspection is required within each 180-day period after work begins.
    • A one-time 180-day extension may be granted for reasonable cause for an unexpired permit.

    commencement deadline: <= 180 days (after building permit issuance) · completion deadline: <= 12 months (after commencement)

    “Construction shall begin within 180 days”

Still unanswered

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

  • Owner-builder exemption — Owner-builders in Mayfield Township.
  • Minimum dwelling size — Residential districts in Mayfield Township.
  • Minimum lot size — Residential and agricultural districts in Mayfield Township.
  • Setbacks — Structures in Mayfield Township.
  • Lot coverage — Zoning districts in Mayfield Township.
12 more unanswered
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic permit
  • Septic inspection
  • Well permit
  • 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 Mayfield Township publishes no rule on the point, not that none exists. DeKalb County’s page lists the county offices to call.

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