Bolthole Index

Ogle County, Illinois

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

Dement Township is a township in Ogle County, Illinois. Septic permits inside Dement Township come from Ogle County (Ogle County Health Department · (815) 562-6976). 12 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Ogle County page.

Answers from the rulebook for Dement Township

Rules another office applies inside Dement Township

Dement 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

    Most construction projects on unincorporated land in Dement Township.

    • The guide says permits are generally required for most residential construction, including new homes, additions, decks, porches, patios, detached buildings, and pools.
    • A zoning certificate is required before construction or preliminary work under the county zoning code.
    “Permits for most construction projects are required before that construction starts.”
  • Owner-builder exemptionConditional

    Installation of a private sewage disposal system for an owner's single-family residence on land in Dement Township.

    • The owner remains required to obtain a permit and comply with all regulations.
    • A resident owner intending to install the system must attend the health officer's educational training session and pay the scheduled training fee.
    “This exception does not relieve the owner from obtaining a permit to install and from complying with the other provisions of these regulations.”
  • InspectionsRequired

    Residential construction projects on unincorporated land in Dement Township.

    • The county guide characterizes the number as generally three inspections during construction; individual projects may differ.

    generally stated inspection count: 3 inspections (During the course of construction; guide uses 'Generally'.)

    “Generally, three inspections are made during the course of construction.”
  • Certificate of occupancyRequired

    Completed construction projects or changes in use on unincorporated land in Dement Township.

    • The certificate is issued upon project completion or when a tract's use changes.
    • A certificate issued in conflict with the zoning chapter is null and void.
    “Occupancy certificates are issued upon completion of the construction project, or when the use on a tract of land changes.”
  • Local zoningPresent (with conditions)

    Land in Dement Township that is outside an incorporated city, village, or town; administered by Ogle County rather than documented as a Dement Township ordinance.

    • The official guide limits the county department's construction regulation to the unincorporated area.
    • Parcel zoning district must be identified before determining permitted uses or dimensional controls.
    “The Ogle County Planning & Zoning Department is responsible for regulating construction activities in the unincorporated area of the county.”
  • Zoning districtsPublished (with conditions)

    Unincorporated land in Dement Township subject to Ogle County zoning.

    • District controls depend on the parcel's underlying zoning district.
    “The unincorporated area of the county is divided into districts or “zones”. Certain types of uses are allowed in each of these districts. The ordinance lists those uses.”
  • Minimum lot sizeSpecified

    A single-family dwelling constructed on a lot divided and set aside from a farm in Ogle County's AG-1 Agricultural District, if that district applies to land in Dement Township.

    • At least one listed criterion must be met before issuance of the special-use permit.
    • The applicant must certify by affidavit and record it with the property deed; proof of recordation is required before a zoning certificate issues.

    minimum lot area: >= 1 acre (Single-family dwelling on a lot divided and set aside from a farm in AG-1.) · minimum lot width: >= 150 feet (Single-family dwelling on a lot divided and set aside from a farm in AG-1.)

    “Single-family dwelling, when constructed on a lot divided and set aside from a farm as defined herein. Lot area shall be not less than one (1) acre and the lot width shall be not less than one hundred fifty feet (150').”
  • Who permits septicCounty (with conditions)

    Private sewage disposal systems in Dement Township.

    • The county health officer issues the permit for the specific proposed construction or alteration.
    “It shall be unlawful for any person to construct, or make alterations to, a private sewage disposal system within Ogle County unless a valid permit has been issued by the Ogle County health officer in the name of such person for the specific construction or alteration proposed.”
  • Septic permitRequired

    Construction or alteration of a private sewage disposal system in Dement Township.

    • Permit issuance requires a completed conforming application.
    • For severe site-soil limitations or relocation, the health officer may require additional borings, exploration pits, or an engineering plan.
    • The permit lasts one year; if unfinished then, a new permit is necessary.
    • The application fee follows § 10-1D-2.

    permit validity: 1 year (A new permit is necessary if the system is not completed by the end of the period.)

    “permits shall be issued for a period of one year; if the system is not completed at the end of the one year period, a new permit will be necessary.”
  • Agricultural exemptionConditional

    Agricultural uses on unincorporated land in Dement Township subject to Ogle County zoning.

    • The guide says the exemption is according to state law.
    • The county advises confirming the possibility with the zoning department and legal counsel.
    “Certain agricultural uses are exempt from meeting local zoning requirements according to state law.”
  • Subdividing landRegulated (with conditions)

    Division of land in the unincorporated portions of Dement Township.

    • A preliminary plat must be approved before final-plat submission.
    • One-lot subdivisions often require county approval, although some may be exempt or may be approved by the Plat Officer.
    “The Planning & Zoning Department is charged with regulating the division of land in the unincorporated areas of Ogle County.”
  • Building in a floodplainRequired

    Development within floodplains in Dement Township that are within Ogle County and outside incorporated city or village boundaries.

    • The county planning and zoning administrator processes development permits.
    • The administrator must inspect development projects and ensure other required local, state, and federal permits are obtained.
    “The planning and zoning administrator shall be designated the floodplain administrator, shall be responsible for the general administration of this division and shall ensure that all development activities within the floodplains under the jurisdiction of Ogle County (those floodplains that are within the boundaries of the county of Ogle but outside the boundaries of any incorporated city or village) meet the requirements of this division.”

Still unanswered

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

  • Building code adopted — Dement Township, Illinois.
  • Minimum dwelling size — Single-family dwellings in Dement Township.
  • Setbacks — New residential construction in Dement Township.
  • Lot coverage — Residential lots in Dement Township.
  • Building height — Residential buildings in Dement Township.
12 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Driveway access
  • Short-term rentals
  • Permit fees

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

← All of Ogle County: county rules, score and offices