Zoning, building permits and septic rules in Eden Township, Illinois

Eden Township’s own rules

• Building permitRequired

  Specified construction on unincorporated land inside Eden Township under county administration.

  • Required for all commercial projects.
  • Required for residential structures over 200 square feet or larger than 20 feet on any side.
  • Residential remodeling requires structural changes; the page also lists signs, fences, pools, solar and wind equipment, and towers.
  • Additional zoning approvals may be necessary depending on project type.

  residential structure area threshold: > 200 square feet (or larger than 20 feet on any side) · residential structure side threshold: > 20 feet (or over 200 square feet)

  “Building permits are required for all commercial projects, all residential structures over 200 square feet or larger than 20 feet on any side, and residential remodeling requires structural changes, signs, fences, pools, solar and wind equipment, and towers. Additional zoning approvals may be necessary depending on the type of project.”

• Building code adoptedAdopted (with conditions)

  Construction on unincorporated land inside Eden Township administered under LaSalle County's construction-permit system.

  • The county notice states an effective date of January 1, 2025.
  • The notice identifies amendments including wind-load updates and deletion of IRC energy-efficiency and sprinkler-system provisions.

  International Residential Code edition: 2024 · International Building Code edition: 2024 · National Electrical Code edition: 2023

  “Effective January 1, 2025; LaSalle County Building codes will be updated to the following code years with amendments: International Residential Code 2024, International Building Code 2024 International Fire Code 2024, the International Mechanical Code 2024, International Fuel Gas Code 2024, and National Electrical Code 2023.”

• Local zoningPresent (with conditions)

  Unincorporated land inside Eden Township; the operative zoning rule is administered by LaSalle County, not shown as an Eden Township ordinance.

  • Does not establish rules for incorporated municipal territory within Eden Township.
  • The county ordinance applies to properties in unincorporated LaSalle County.

  “It is hereby declared that the provisions of this Ordinance shall apply to all properties in unincorporated LaSalle County as hereinafter specifically provided:”

• Zoning districtsPublished (with conditions)

  Unincorporated land inside Eden Township subject to LaSalle County zoning.

  • District boundaries are shown on the zoning district map of each township.
  • Does not establish zoning districts for incorporated municipal territory.

  “In order to carry out the purpose and intent of this Ordinance, the unincorporated area of the County is hereby divided into the following districts: AGRICULTURE DISTRICTS A-1 Agriculture District AC Agriculture-Conservation District RESIDENCE DISTRICTS R-1 Rural Residence District R-2 Single Family Residence District R-3 General Residence District”

• SetbacksSpecified

  Most zoning districts on unincorporated land inside Eden Township.

  • The county page says these measurements apply in most zoning districts; the particular zoning district may impose different requirements.
  • Does not establish municipal setbacks in incorporated territory.

  township-road centerline setback: 70 feet (most zoning districts) · county-road centerline setback: 85 feet (most zoning districts) · state/federal-route centerline setback: 100 feet (most zoning districts) · side/rear yard setback: 10 feet (most zoning districts)

  “Building setbacks in most zoning districts are 70 feet from Township Road centerline, 85 feet from County Road centerline, 100 feet from State/Federal Route centerline, and 10 feet from side/rear yards.”

• Who permits septicCounty (with conditions)

  Private sewage disposal on unincorporated land inside Eden Township.

  • The County zoning ordinance also requires sewage disposal and water supply to conform to LaSalle County Health Department and Illinois Health Department standards.

  “Regardless of other provisions of this Ordinance, in all classifications and in all districts there shall always be sufficient ground area left unoccupied by a structure or a paved area for, a proper system of sewage disposal and water supply conforming with the standards and requirements of the LaSalle County Health Department and the Health Department of the State of Illinois.”

• Septic permitLimited

  Repair of an existing private sewage-disposal system on floodplain land inside Eden Township.

  • This finding is limited to repairs of existing private systems in the floodplain context.
  • Repaired systems must meet all current county and state regulations.

  “In the event that existing private sewage disposal systems need repairs, a permit will be required from the LaSalle County Health Department. The LaSalle County Private Sewage Disposal Ordinance requires that systems being repaired meet all current County and State regulations.”

• Agricultural exemptionAvailable (with conditions)

  Agricultural uses on unincorporated land inside Eden Township.

  • Agricultural buildings and structures must still conform to minimum setbacks and lot sizes.
  • The exemption is as provided by Illinois Compiled Statutes.

  “Agricultural uses as previously defined, Section 3.1, except that agricultural buildings and structures shall conform to minimum setbacks and lot sizes, even if used for agricultural purposes.”

• Subdividing landRegulated (with conditions)

  Property splits and subdivision activity on unincorporated land inside Eden Township.

  • The split must comply with the LaSalle County Subdivision Ordinance, LaSalle County Zoning Ordinance, and Illinois Plat Act.
  • The county page directs applicants to contact the department before subdividing.

  “Please contact our department prior to subdividing property in order to verify that the split will comply with the LaSalle County Subdivision, LaSalle County Zoning Ordinance, and the Illinois Plat Act.”

• Building in a floodplainLimited

  Alteration or relocation of a watercourse on floodplain land inside unincorporated Eden Township.

  • LaSalle County must notify adjacent communities in writing 30 days before issuing the permit.
  • This finding is limited to alteration or relocation of a watercourse.

  adjacent-community notice before permit issuance: >= 30 days (alteration or relocation of the watercourse)

  “In addition, LaSalle County shall notify adjacent communities in writing thirty (30) days prior to the issuance of a permit for the alteration or relocation of the watercourse.”

• Permit processPartial

  Construction permitting on unincorporated land inside Eden Township.

  • Permit submittals are directed to the listed county office.
  • The page provides Safebuilt contact details for building-inspection scheduling and code/plan-review questions.
  • This is a partial published process, not a complete application checklist.

  “Permit Submittals: LaSalle County Office 119 West Madison Street - Room 107 Ottawa, Illinois 61350 Phone: 815-434-8666”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Eden Township or LaSalle County directly.

• Owner-builder exemption — Owner-built dwellings inside Eden Township.
• Inspections — Building work inside Eden Township.
• Certificate of occupancy — Occupancy inside Eden Township.
• Minimum dwelling size — Dwellings inside Eden Township.
• Minimum lot size — Residential lots inside Eden Township.

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.