Zoning, building permits and septic rules in Troy Grove Township, Illinois

Troy Grove Township’s own rules

• Building permitRequired

  Buildings and covered structures on unincorporated land within Troy Grove Township.

  • The structure must be 200 square feet or larger, or have a side 20 feet or greater.
  • The County brochure lists structures less than 200 square feet with no side dimension greater than 20 feet among common structures not requiring permits.
  • County permits do not apply inside corporate city/village boundaries.

  area threshold: >= 200 square feet (Permit trigger alternative.) · side threshold: >= 20 feet (Permit trigger alternative.)

  “BUILDING PERMITS ARE REQUIRED FOR: Any…. Building, Accessory Structure, Structure, Deck, Rebuilding, Structurally Altering, Adding to, Relocation, or significant change of use, of structure in unincorporated LaSalle County If…. The Structure is one of the following: 1. 200 s.f. or larger or; 2. has a side of 20 feet or greater”

• Owner-builder exemptionConditional

  Owner-occupant installation of a private sewage disposal system in a subdivision approved after April 1988 within unincorporated Troy Grove Township.

  • The owner-occupant must meet the stated Illinois Private Sewage Disposal Licensing Act and Code standards and the LaSalle County Private Sewage Disposal Ordinance.
  • The ordinary rule requires a Registered LaSalle County Individual Sewage System Contractor.
  • The system is subject to County Inspector inspection before it is covered.

  “All private sewage disposal systems within subdivisions approved after April 1988 shall be installed only by a Registered LaSalle County Individual Sewage System Contractor. One exception would be the installation by the owner occupant as long as he/she meets the standards provided in the "Private Sewage Disposal Licensing Act and Code", 2003 or the latest revision thereof, the LaSalle County Private Sewage Disposal Ordinance enacted April 11, 1988, or the latest revision thereof.”

• Building code adoptedAdopted (with conditions)

  Permit-required structures in unincorporated land within Troy Grove Township; incorporated city/village land is excluded from the County building-permit program.

  • Residential structures subject to permits use the 2024 International Residential Code and 2023 National Electrical Code as amended by the County Board.
  • Specified nonagricultural commercial, industrial, storage, business, institutional-public except state/federally funded, and multifamily structures use the listed 2024 ICC codes and 2023 NEC.
  • County brochure identifies structures inside a corporate city/village boundary as not requiring County permits.

  residential code edition: 2024 International Residential Code (One- and two-family dwellings requiring building permits.) · electrical code edition: 2023 National Electrical Code (As amended by the LaSalle County Board.)

  “Residential Structures that require Building Permits are subject to the International Residential Codes - for one and two family dwellings, 2024 and 2023 National Electric Code as amended by the LaSalle County Board.”

• Living in an RVLimited

  Recreational vehicle living or sleeping use on unincorporated land within Troy Grove Township.

  • Living or sleeping use is limited to 180 days in a calendar year.
  • It cannot be used for living or sleeping at any time in a subdivision, unincorporated platted town, or parcel with an existing residence, unless otherwise permitted by the ordinance.

  maximum living or sleeping period: <= 180 days per calendar year (Additional location prohibitions apply.)

  “A recreational vehicle, as defined in Chapter 3, may be used for living or sleeping purposes for a period not exceeding 180 days in a calendar year. A recreational vehicle shall not be used for living or sleeping purposes for any period of time when located in a subdivision, unincorporated platted town, or on a parcel with an existing residence; unless otherwise permitted by this ordinance.”

• Who permits septicCounty (with conditions)

  Private sewage disposal systems within Troy Grove Township where a County private-sewage permit is needed.

  • A completed application, fee, and onsite survey by County Health Department personnel are prerequisites to permit issuance.

  “A permit for construction will not be issued until a completed application and fee have been submitted to the LaSalle County Health Department and an onsite survey performed by department personnel.”

• Septic permitRequired

  Construction of a private sewage disposal system within Troy Grove Township.

  • Construction permit is not issued until the completed application and fee are submitted to the LaSalle County Health Department and its personnel perform an onsite survey.
  • The listed application fee is returned if the permit is denied.

  private sewage disposal permit application fee: 230 USD (Returned to applicant if permit is denied.)

  “This is your permit application. There is a two hundred thirty ($230.00) dollar application fee for a private sewage disposal system permit. If a permit is denied, the fee shall be returned to the applicant.”

• Septic inspectionRequired

  Private sewage disposal-system construction within Troy Grove Township.

  • The Health Department must be notified for final inspection before backfilling.
  • For subdivisions approved after April 1988, systems must be inspected by the County Inspector before being covered.

  “The Health Department must be notified for a final inspection sewage disposal system construction before backfilling.”

• Mandatory utility hookupSewer (with conditions)

  Subdivision lots within Troy Grove Township located within 1,000 feet of a community public sewer system.

  • Connection/use is required only if allowed by the controlling authority.
  • This source establishes a sewer requirement for the specified subdivision condition, not a general water-connection requirement for every Township parcel.

  distance to community public sewer system: <= 1000 feet (Only when connection is allowed by controlling authority.)

  “Subdivisions located within 1000 feet of a community public sewer system shall utilize said sewer system if allowed by controlling authority.”

• Agricultural exemptionAvailable (with conditions)

  Agriculture as defined by the LaSalle County Zoning Ordinance on unincorporated land within Troy Grove Township.

  • The exemption applies to agriculture as the ordinance defines it.
  • The cited provision concerns exemption from the County zoning ordinance, not exemption from every separate state, County, health, or building requirement.

  “AGRICULTURE, AS DEFINED IN CHAPTER 3, IS EXEMPT FROM THE REGULATIONS OF THIS ORDINANCE AS PROVIDED IN SECTION 6.4B.- EXEMPTIONS.”

• Subdividing landRegulated (with conditions)

  Subdivision development within unincorporated Troy Grove Township.

  • Private sewage disposal systems must meet Illinois and applicable County requirements.
  • For subdivisions approved after April 1988, the registered-contractor rule and owner-occupant exception apply.

  “Rules and Regulations Governing Subdivisions and Dedications in LaSalle County”

• Permit feesPublished (with conditions)

  County building permits for qualifying construction on unincorporated land within Troy Grove Township.

  • Fees are paid when permit is issued and picked up.
  • Fees are nonrefundable.
  • Final price is figured by the building inspector after plan review.
  • The $25 figure is specifically for bona fide agricultural-building compliance permits.

  agricultural compliance permit fee: 25 USD per application (Bona fide agriculture buildings.)

  “Agriculture (Bona Fide agriculture buildings): $25.00 per AG Exempt application”

• Permit processPublished (with conditions)

  County building permits for qualifying construction on unincorporated land within Troy Grove Township.

  • The owner agrees to comply with County zoning and building-permit ordinances.
  • For permits requiring inspections, use before occupancy is prohibited.
  • The application requests project location, township, permit type, estimated value, planned use, proposed setbacks, and height.

  “The owner agrees that construction will be accomplished in strict compliance with this application and regulations contained in the LaSalle County Zoning Ordinance and LaSalle County Building Permit Ordinance.”

Rules another office applies inside Troy Grove Township

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

• Zoning districtsPublished (with conditions)

  Unincorporated portions of Troy Grove Township subject to the LaSalle County Zoning Ordinance; incorporated places are outside the County zoning scope described by the ordinance.

  • District applicability is parcel-specific and should be confirmed against the official County zoning map and amendments.
  • The County's zoning page warns that electronic versions may not be the official record.

  “the County Board shall have the power to regulate and restrict the location and use of buildings, structures and land [...] outside the limits of cities, villages and incorporated towns which have in effect municipal zoning ordinances; to divide the entire County outside the limits of such cities, villages and incorporated towns into districts of such number, shape, area and of such different classes”

• Minimum lot sizeDistrict specific (with conditions)

  Single-family detached dwellings on unincorporated Troy Grove Township land zoned A-1 Agriculture District.

  • Except as otherwise provided in the ordinance.
  • Minimum lot width for a single-family detached dwelling is 150 feet.

  minimum lot area: >= 35 acres (Except as otherwise provided in the ordinance.) · minimum lot width: >= 150 feet (Single-family detached dwellings.)

  “A. MINIMUM LOT AREA: 1. Single Family Detached Dwellings: The zoning lot shall be not less than thirty-five (35) acres. [...] B. MINIMUM LOT WIDTH: 1. Single Family Detached Dwellings: Not less than 150 feet.”

• Building heightDistrict specific (with conditions)

  Dwelling units on unincorporated Troy Grove Township land zoned A-1 Agriculture District.

  • On lots one acre or greater, non-dwelling buildings have no height limitation.
  • The stated 36-foot limitation applies to all dwelling-unit buildings and buildings on lots under one acre.

  maximum dwelling building height: <= 36 feet (A-1 district dwelling units.)

  “MAXIMUM HEIGHT OF BUILDINGS: On zoning lots of one (1) acre of land area or greater, no height limitations on non-dwelling unit buildings. On zoning lots with less than one (1) Acre of land area, and on all buildings used as dwelling units the building height shall not exceed thirty-six (36) feet in height.”

• Accessory dwellingsLimited

  Accessory dwelling units on unincorporated Troy Grove Township land zoned R-2 Single Family Residence District.

  • Accessory dwelling units are listed as a special use in R-2.
  • Special uses require prior approval after public hearing under Section 14.10.

  “The following Special Uses require prior approval after public hearing in accordance with the requirements of Sec. 14.10. [...] R. ACCESSORY DWELLING UNIT (see Chapter 3, Definitions).”

Still unanswered

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

• Certificate of occupancy — Residential construction within Troy Grove Township.
• Local zoning — Whether Troy Grove Township itself has adopted and administers a zoning ordinance.
• Minimum dwelling size — Dwellings within Troy Grove Township.
• Setbacks — Residential development within Troy Grove Township.
• Lot coverage — Lots within Troy Grove 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.