Will County, Illinois
Custer Township is a township in Will County, Illinois. Septic permits inside Custer Township come from Will County (Will County Health Department — Private Sewage Program (Joliet Main Office) · 815-727-8490). 4 rules below are quoted from official sources and independently re-checked, most recently on October 30, 2026. Rules for unincorporated land are on the Will County page.
Custer 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 alterations of buildings on unincorporated land inside Custer township (outside the limits of cities, villages and incorporated towns)
“a permit must be obtained in advance and all other requirements of the building ordinance must be complied with whenever a building or parts of appurtenance thereof, such as water supply, sewage disposal, plumbing installation, electrical installation and heating equipment located outside the limits of cities, villages and incorporated towns of this county and regulated by the ordinance, is erected, installed, altered, converted, remodeled, re-roofed, structurally repaired, moved or changed, except as provided hereafter”
Electrical work by an owner on their own residence on unincorporated land inside Custer township; a general owner-builder exemption was not found
“qualified homeowners who can demonstrate their ability to perform such work, to the satisfaction of the building department, may work on their own place of residence as long as they reside on site for a period of at least six (6) months after issuance of the certificate of occupancy.”
Private sewage disposal systems on land inside Custer township (the Will County Health Department handles septic permits; the county also reviews lots for sewage disposal under the building ordinance)
“for fy2018, eh conducted 2,010 water program activities, 1,166 sewage program activities, and handled 138 septic permits.”
Agricultural-use exemption from county building permits on unincorporated land in Custer township
“150.003 agricultural exemptions (a) (no fee permit) see agricultural exemptions in the will county zoning ordinance (150-1.50 (a)). any plumbing or electrical herein will require a permit.”
We looked and could not find an official answer yet. Silence is not permission; ask Custer Township or Will 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 Custer Township publishes no rule on the point, not that none exists. Will County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Custer Township means bringing your own water and power. The kit we’d start with:
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