Ogle County, 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.
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.
Most construction projects on unincorporated land in Dement Township.
“Permits for most construction projects are required before that construction starts.”
Installation of a private sewage disposal system for an owner's single-family residence on land in Dement Township.
“This exception does not relieve the owner from obtaining a permit to install and from complying with the other provisions of these regulations.”
Residential construction projects on unincorporated land in Dement Township.
generally stated inspection count: 3 inspections (During the course of construction; guide uses 'Generally'.)
“Generally, three inspections are made during the course of construction.”
Completed construction projects or changes in use on unincorporated land in Dement Township.
“Occupancy certificates are issued upon completion of the construction project, or when the use on a tract of land changes.”
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 Ogle County Planning & Zoning Department is responsible for regulating construction activities in the unincorporated area of the county.”
Unincorporated land in Dement Township subject to Ogle County zoning.
“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.”
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.
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').”
Private sewage disposal systems in Dement Township.
“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.”
Construction or alteration of a private sewage disposal system in Dement Township.
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 uses on unincorporated land in Dement Township subject to Ogle County zoning.
“Certain agricultural uses are exempt from meeting local zoning requirements according to state law.”
Division of land in the unincorporated portions of Dement Township.
“The Planning & Zoning Department is charged with regulating the division of land in the unincorporated areas of Ogle County.”
Development within floodplains in Dement Township that are within Ogle County and outside incorporated city or village boundaries.
“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.”
We looked and could not find an official answer yet. Silence is not permission; ask Dement Township or Ogle County directly.
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.
Off-grid gear
Going off-grid in Dement Township means bringing your own water and power. The kit we’d start with:
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