Lee County, Illinois
Hamilton Township is a township in Lee County, Illinois. Septic permits inside Hamilton Township come from Lee County (Lee County Health Department, Environmental Health · 815-284-3371). 7 rules below are quoted from official sources and independently re-checked, most recently on October 29, 2026. Rules for unincorporated land are on the Lee County page.
Hamilton Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Onsite septic and private sewage disposal systems inside Hamilton township, Lee County, Illinois. The county code applies countywide, including Hamilton township; this is a county rule, not a Hamilton township ordinance.
“no septic tank, privy vault, sink drain, or sewage disposal system shall be erected, constructed, or repaired in this county, except in accordance with this chapter, and it shall be unlawful to proceed with such work unless a permit has first been obtained from the county board of health”
New or repaired septic tanks and sewage disposal systems inside Hamilton township, Lee County, Illinois (where no public sewer connection is required). County rule applied inside Hamilton township.
“applications shall be approved by the county health department and permits shall be issued before any construction or repair is undertaken and before the building permit is issued.”
Septic systems installed inside Hamilton township, Lee County, Illinois. County rule applied inside Hamilton township.
“Before backfilling is started but after the complete installation of the system”
Subdivisions creating individual lots that will use private sewage systems inside Hamilton township, Lee County, Illinois. General county subdivision regulation (Title 11) was not opened.
minimum subdivision review fee (septic lots): >= 100 USD
“a minimum of one hundred dollars ($100.00)”
Septic / sewage disposal permit application fees for systems inside Hamilton township, Lee County, Illinois (county fee schedule). Building and zoning permit fees were not located in an official source.
tank-only permit application fee (licensed contractor): 125 USD (2027 column $150.00; 2030 column $175.00) · residential tank and field permit application fee (licensed contractor): 225 USD (2027 column $250.00; 2030 column $275.00) · commercial permit application fee (licensed contractor): 325 USD (2027 column $350.00; 2030 column $375.00)
“one hundred twenty-five dollars ($125.00)”
“a fee of twice the amount of a contractor-installed residential system must accompany each sewage application submitted by the property owner installing a septic system on their own residential property.”
The septic / sewage disposal permit process inside Hamilton township, Lee County, Illinois. The general building permit process was not located in an official source.
“Application for permits under this section”
We looked and could not find an official answer yet. Silence is not permission; ask Hamilton Township or Lee 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 Hamilton Township publishes no rule on the point, not that none exists. Lee County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Hamilton Township means bringing your own water and power. The kit we’d start with:
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