Cass County, Illinois
Arenzville Township is a township in Cass County, Illinois. Septic permits inside Arenzville Township come from the state health agency. 13 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Cass County page.
Arenzville Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
New construction and projects on land in unincorporated Arenzville township (county zoning permit)
“Failure to obtain a building permit before starting a project may result in a fine.”
Solar energy systems on land in unincorporated Arenzville township
“Roof or building mounted solar energy systems shall meet the requirements of all Cass County Building and Property Maintenance Codes.”
Land inside Arenzville township that is outside village limits (unincorporated). County-administered zoning, not a township ordinance, applies there.
“This applies to the unincorporated areas of the county as well as villages that do not have a zoning ordinance.”
County zoning districts applicable to unincorporated land in Arenzville township
“2. R-2 – Single-Family Residential District”
Residences on land in the agricultural district in unincorporated Arenzville township
minimum living area: >= 800 sq ft
“The minimum living area of any residence constructed in an agricultural district must be at least eight hundred (800) square feet.”
Single-family residence or detached structure on land in the agricultural district in unincorporated Arenzville township
minimum lot size: >= 3 acres
“The minimum lot size permitted for the construction of a single-family residence or detached structure in an agricultural district is a minimum of three (3) acres.”
Yards for single-family dwellings in the R-2 district in unincorporated Arenzville township
front yard: 25 feet · rear yard: 30 feet
“2) Minimum Yards: a) Front 25 feet b) Rear 30 feet c) Side 10% of lot width”
Building ground coverage on R-2 lots in unincorporated Arenzville township
maximum ground coverage: <= 30 percent of lot
“a) Maximum Ground Coverage 30% of lot area”
Principal buildings on R-2 lots in unincorporated Arenzville township
maximum building height: <= 35 feet
“10,000 sq. ft. 75 feet 25 feet 30 feet 10% of lot 30% of lot 1,300 sq. ft. 35 feet”
Private sewage disposal systems with no surface discharge (septic tanks, seepage fields) on land inside Arenzville township; the state rule applies there. Whether the Cass County Health Department acts as an IDPH agent for plan review in this area was not verified.
“The Illinois Department of Public Health (IDPH) regulates the installation of all private sewage disposal systems that have no surface discharge (such as septic tanks and seepage fields)”
Installation of a septic or private sewage system on land inside Arenzville township
“Staff also review and approve plans for private sewage disposal systems and alternative private sewage disposal systems before construction.”
Land used for agricultural purposes in unincorporated Arenzville township
“the regulations of this ordinance shall not be construed to impose regulations or require permits with respect to land used for agricultural purposes, as herein defined”
Zoning permit application for projects on land in unincorporated Arenzville township
“Applications for a permit shall be made in triplicate to the County Zoning Enforcement Officer on forms furnished by the County Zoning Enforcement Officer”
We looked and could not find an official answer yet. Silence is not permission; ask Arenzville Township or Cass 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 Arenzville Township publishes no rule on the point, not that none exists. Cass County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Arenzville Township means bringing your own water and power. The kit we’d start with:
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