Henry County, Illinois
Andover Township is a township in Henry County, Illinois. Septic permits inside Andover Township come from Andover Township. 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 Henry County page.
Andover Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Construction, alteration, repair, movement, demolition, enlargement, or change of occupancy of a building or structure in the unincorporated portions of Andover Township.
“Any owner or authorized agent (contractor)who intends to construct, enlarge, alter, repair, move, demolish or change occupancy of a building/structure shall first obtain required building permit.”
Buildings in the unincorporated portions of Andover Township.
code edition: International Building Code 2000 Edition
“henry county adopted the uniform building code 1976 edition on may 8, 1979; replaced the code with uniform building code 1988 edition on december 12, 1989 and replaced the code with international building code 2000 edition on april 17, 2001.”
Permitted construction in the unincorporated portions of Andover Township.
“All construction or work for which a permit is required shall be subject to inspection by the building official.”
Accessory buildings in the unincorporated portions of Andover Township.
maximum accessory building height: <= 20 ft (Measured from floor of building to roof peak.)
“accessory buildings shall not exceed 20 feet in height, measured from floor of building to roof peak of building.”
Private sewage-disposal systems inside Andover Township where public sewer is unavailable.
“Our office regulates these systems to ensure: new installations meet code requirements and are properly installed, malfunctioning systems are repaired promptly to prevent contamination, and all repairs and new installations are permitted through our office.”
New installations and repairs of private sewage systems inside Andover Township where public sewer is unavailable.
“all repairs and new installations are permitted through our office.”
Private water wells for projects in the unincorporated portions of Andover Township.
“PLEASE OBTAIN NECESSARY PRIVATE WATER WELL AND SEWAGE DISPOSAL SYSTEM PERMITS FROM THE HENRY COUNTY HEALTH DEPARTMENT BEFORE STARTING PROJECT”
Agricultural buildings and structures in the unincorporated portions of Andover Township.
“illinois law exempts agricultural buildings/structures from all zoning regulations except minimum set back from road right-of-way requirements”
Subdivision of land in the unincorporated portions of Andover Township.
“to manage the zoning, planning, subdividing, building, ag areas and floodplain management programs.”
New driveway access for construction projects in the unincorporated portions of Andover Township.
“Driveway access permits are required from highway authority with jurisdiction and must be installed prior to starting construction project.”
County building permits in the unincorporated portions of Andover Township.
“A building permit fee made payable to Henry County Treasurer in amount as prescribed by the County Board shall be submitted with the permit application and construction documents.”
County building-permit applicants in the unincorporated portions of Andover Township.
“To obtain required building permit, applicant shall provide the following information on the application:”
We looked and could not find an official answer yet. Silence is not permission; ask Andover Township or Henry 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 Andover Township publishes no rule on the point, not that none exists. Henry County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Andover Township means bringing your own water and power. The kit we’d start with:
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