Zoning, building permits and septic rules in Coal Valley Township, Illinois

Rules another office applies inside Coal Valley Township

Coal Valley 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 buildings and structures constructed in unincorporated Coal Valley township (county land, not village land)

  • Exempt categories are limited; the county FAQ says permits are required for all home improvements except carpet, paint and gutters.
  • Work started without a permit is charged double, with no exceptions, per the county FAQ.
  • Agricultural structures are exempt from fees but still require a permit (state law as quoted by county).

  “require building permits, fees, minimum design standards with specifications and occupancy permits for all structures and buildings to be constructed in the unincorporated areas of rock island county except as exempted.”

• Owner-builder exemptionAvailable

  Homeowners doing work on their own home in unincorporated Coal Valley township

  • Contractors doing the work must provide proof of liability insurance.
  • Contractors pulling a permit must register with the county.
  • Plumbers and roofers must be licensed with the State of Illinois.

  “a homeowner can do the work on their home, but we do require proof of liability insurance from contractors who would do the work.”

• Building code adoptedAdopted

  New construction and alterations in unincorporated Coal Valley township (Rock Island County rules; the Village of Coal Valley applies its own codes)

  • County page lists 2021 International Building, Existing Building, Fuel Gas, Mechanical, Property Maintenance, Residential, and Swimming Pool and Spa codes, plus the 2024 Illinois Energy Conservation Code (effective nov 30, 2025), 2014 Illinois Plumbing Code, and 2020 National Electrical Code, all with local amendments.
  • Older county material cited 2012 I-codes; the current county page was used here, but its currency should be confirmed with the office.

  “current codes being used (not inclusive of all federal and state of illinois requirements): 2021 international building code (see note 1)”

• InspectionsRequired

  Permitted construction in unincorporated Coal Valley township

  • Inspections are by county building staff; inspectors cover the county in field hours 10 am to 3 pm per county page.
  • The county says the permit is not complete until field personnel conduct a final inspection (agricultural structures form).

  “the building department is responsible for enforcement of the county's building codes, including reviewing plans for new and altered construction projects, issuing building permits and occupancy permits and on-site inspections.”

• Certificate of occupancyRequired

  Buildings in unincorporated Coal Valley township that the county building department reviews

  • Occupancy permits are issued by the county building department after its inspections.
  • Applies to structures covered by the county building code; agricultural exemptions still require an occupancy permit under the county code paragraph.

  “the building department is responsible for enforcement of the county's building codes, including reviewing plans for new and altered construction projects, issuing building permits and occupancy permits and on-site inspections.”

• Zoning districtsPublished (with conditions)

  Parcels in unincorporated Coal Valley township

  • Map is a county PDF; parcel zoning class is available through the county GIS mapping site.
  • The county says it only has zoning information for unincorporated land.

  “a zoning map (pdf) is available in 11-inch-by-17-inch pdf format on our downloads page.”

• Minimum lot sizeDistrict specific (with conditions)

  Residential building lots in unincorporated Coal Valley township; the main single-family district and any agricultural district were not identified in the pages opened

  • The county says the minimum lot size varies across the county by zoning classification.
  • The county's building FAQ says the smallest parcels may be about 20,000 square feet.
  • The county may require a 40-acre minimum building site in extreme outlying areas; the county advises emailing its director for a specific site.

  minimum lot size (smallest parcels): >= 20000 square feet (varies by zoning classification; outlying areas may require 40 acres) · minimum building site (outlying areas): >= 40 acres (extreme outlying areas only, per county)

  “the minimum lot size varies all throughout the county ranging from 20,000 square feet and in some outlying areas it requires a minimum lot size of 40 acres to build a residence.”

• SetbacksSpecified

  Agricultural structures in unincorporated Coal Valley township; the main single-family residential district setbacks were not located

  • Setbacks are the minimums stated for agricultural structures in the county exemption application.
  • Lot area and yard requirements of the property's zoning classification also apply, per the county form.

  primary structure front yard: >= 40 feet (agricultural structures; from common right-of-way/property line boundary) · primary structure rear yard: >= 40 feet (agricultural structures) · primary structure side yard: >= 15 feet (agricultural structures) · accessory structure front yard: >= 40 feet (agricultural structures) · accessory structure rear yard: >= 5 feet (agricultural structures) · accessory structure side yard: >= 5 feet (agricultural structures)

  “primary structure o front yard - minimum 40 feet back from common right-of-way/property line boundary.”

• Who permits septicCounty (with conditions)

  Septic systems for new homes in unincorporated Coal Valley township, handled by the Rock Island County Health Department (Environmental Health)

  • Environmental Health approval is required before the county building permit for a new home is issued.
  • The county health department's Environmental Health program is at 2112 25th Avenue, Rock Island, per the health department page (not separately opened in this run).

  “approval from environmental health, a division of the rock island county health department for a septic system.”

• Septic permitRequired

  New home septic systems in unincorporated Coal Valley township

  • Septic approval from Environmental Health must be in hand before the building permit application for a new home is complete.

  “approval from environmental health, a division of the rock island county health department for a septic system.”

• Agricultural exemptionAvailable (with conditions)

  Agricultural buildings on farmland in unincorporated Coal Valley township

  • Agriculture must be the principal activity on the land; the agricultural exemption form must be completed.
  • Agricultural permits are issued free of charge under ILCS 5/5-12001, but a permit is still required.
  • The exemption does not exempt state codes, including the Illinois plumbing code, accessibility code and private sewage disposal code.

  “agricultural building / use exemption form must be completed in its entirety for the issuance of an agricultural permit.”

• Building in a floodplainRequired

  Development in special flood hazard areas in unincorporated Coal Valley township

  • Applies where the land is in a special flood hazard area; county floodplain rules are in county section 3-2-38.
  • Floodplain rules apply to all buildings under the Illinois statute the county cites.

  “floodplain regulations shall apply to all building. all agricultural structures and buildings shall adhere to section 3-2-38 development in a special flood hazard area (floodplain regulations)”

• Permit feesVariable (with conditions)

  Building permit fees for construction in unincorporated Coal Valley township

  • Fees vary with the value of the work, using national averages including labor, per county FAQ.
  • Work begun without a permit is charged double.
  • Contractor registration carries no county fee, but proof of liability insurance is required.

  “fees vary with the value of the work being done using national averages, including labor.”

• Permit processPartial

  New home permits in unincorporated Coal Valley township

  • Required items per county FAQ: septic approval, site layout, two sets of blueprints, engineered truss drawings with Illinois engineer stamp, contractor list, erosion control plan, and energy-code compliance (REScheck or ComCheck or equivalent).
  • Address assignment is handled by the county GIS department; address requests need a site layout.

  “a site layout, which is a simple drawing of where the structure will be located on the property, showing rough distances from property lines.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Coal Valley Township or Rock Island County directly.

• Local zoning — Land inside Coal Valley township limits (Rock Island County, IL)
• Minimum dwelling size — Minimum dwelling size in unincorporated Coal Valley township
• Lot coverage — Lot coverage in unincorporated Coal Valley township
• Building height — Building height in unincorporated Coal Valley township
• Living in an RV — Long-term RV occupancy on private land in unincorporated Coal Valley 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.