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

Rules another office applies inside Spring Township

Spring Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

• Building permitRequired

  New construction on unincorporated land inside Spring township, permitted by the Boone County Building & Zoning department

  • A permit is released only after the review is approved and payment is received.
  • Most structures need a site plan approval from the health department before the building permit is released.
  • If the property is inside a subdivision, additional approvals or permits may be required.
  • Zoning must be correct before a building permit can issue.

  “a building permit will be released once the review is approved and payment has been received.”

• Building code adoptedAdopted

  Building construction on unincorporated land inside Spring township, Boone County

  • Adopted with Boone County local amendments.
  • The same page also lists the 2024 Illinois Energy Conservation Code (commercial & residential) with state amendments, the 2020 National Electrical Code with local amendments, and the 2014 Illinois Plumbing Code with local amendments.

  “effective boone county codes 2021 international building code local amendments 2021 international residential code local amendments”

• Local zoningPresent (with conditions)

  Unincorporated land inside Spring township, Boone County, outside any municipality. County zoning is the only zoning rule located for this land; no Spring township zoning ordinance was found.

  • Applies only outside incorporated municipalities; land inside a city or village in Spring township follows that municipality's rules.
  • Township-level adoption of its own zoning was not verified. See the separate township-scope claim.
  • The zoning ordinance text was not opened. The planning page states the final UDO and zoning map were adopted June 18, 2026; the zoning page states the earlier zoning ordinance was adopted July 9, 2008 with amendments to November 18, 2015.

  “the final boone county unified development ordinance (udo) and zoning map adopted june 18, 2026.”

• Zoning districtsPublished (with conditions)

  Zoning district maps covering unincorporated land inside Spring township

  • Interactive county zoning map covers unincorporated Boone County.
  • The district standards themselves were not opened. The zoning page cites the 2008 ordinance; the planning page says the final UDO and zoning map were adopted June 18, 2026, so the district list should be confirmed against the UDO.

  “zoning maps are available for viewing here.”

• Who permits septicMixed (with conditions)

  Private sewage (septic) systems on unincorporated land inside Spring township, Boone County

  • The county health department administers permits and inspections; the page says systems must follow both IDPH and Boone County health department codes.
  • Installer must be Illinois-licensed and Boone County-licensed.

  “the system must be installed in accordance with all idph and boone county health department private sewage disposal codes.”

• Septic permitRequired

  Septic systems for new construction on unincorporated land inside Spring township

  • Septic plan must be drawn to scale and show proposed home or building locations; review takes about 5-10 business days.
  • Soil bores by a certified soil classifier are required for new installation or septic-field replacement after failure.
  • Permit application fees are paid at plan submittal.
  • Installation may not begin before the septic permit is issued.

  “the septic plan and well application must be approved and permits issued before installation or drilling may begin or before a boone county building permit will be issued.”

• Septic inspectionRequired

  Septic system installation on unincorporated land inside Spring township

  • Health department must be notified 48 hours before installation starts; the installer then receives a confirmation number.
  • A call the day before or early on the day of completion is required to book the final inspection.
  • Unscheduled inspections can be requested sooner, for a fee.

  “no portion of any private sewage disposal system shall be covered or concealed until after it has been inspected and approved by the health officer.”

• Well permitRequired

  Water well drilling on unincorporated land inside Spring township

  • The well application must be approved and the permit issued before drilling begins.
  • The well permit is issued together with the septic permit, through the county health department.

  “the septic plan and well application must be approved and permits issued before installation or drilling may begin or before a boone county building permit will be issued.”

• Permit processPublished (with conditions)

  Building and septic permit process for unincorporated land inside Spring township

  • Building permits are filed through the county online system (CloudPermit).
  • Septic plan review takes about 5-10 business days after the plan is received.
  • Variances from Illinois or county code must be requested in letter form before approval.

  “all permits must be submitted using our online system, which is accessible by using the link below.”

Still unanswered

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

• Owner-builder exemption — Owner-builder construction of a home inside Spring township
• Inspections — Building inspections for construction inside Spring township
• Certificate of occupancy — Certificate of occupancy for new homes inside Spring township
• Minimum dwelling size — Minimum dwelling size for the main single-family residential district in Spring township
• Minimum lot size — Minimum lot size for the main single-family residential and agricultural districts in Spring 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.