Bolthole Index

Iroquois County, Illinois

Building permits, zoning and land rules in Iroquois County, Illinois

45Index Score / 100
#81 of 102 in Illinois

Unincorporated Iroquois County, Illinois requires a county building permit for covered construction and inspections for permitted projects12. Iroquois County Planning & Zoning handles county building applications and zoning; the county zoning ordinance covers unincorporated land34. Septic permits to construct or repair a private sewage system anywhere in Iroquois County come from the county Public Health Department56.

At a glance

Building permit
Required for covered work in unincorporated Iroquois County1
Zoning
County zoning applies in unincorporated areas4
Septic authority
County Public Health Department; $100 permit and $150 inspection fees78
RV living
Temporary permit required; travel trailers must move after 180 days9
Tiny homes
No express rule confirmed; some zoning districts require 900 square feet10
Owner-builder exemption
No general exemption confirmed; qualifying owner-occupants may perform their own plumbing under state conditions1112
Private well
$100 permit fee plus $150 inspection fee13
Conventional septic soils
0% of mapped soils rate free of severe limitations14

Who to call

Building permits

Iroquois County Planning & Zoning

Building, construction and development permit applications, zoning classifications, and coordination with building, electrical and plumbing inspectors

(815) 432-7221

1001 East Grant Street, Watseka, IL 60970, Room 108C

Health department

Iroquois County Public Health Department

Private sewage disposal and private-well programs through Environmental Health

(815) 432-2483

1001 East Grant Street, Watseka, IL 60970, Room 112

Roads & driveways

Iroquois County Highway Department

County-highway questions and identification of the road authority to consult about access

(815) 432-4936

1747 North State Route 1, Watseka, IL 60970

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

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Do you need a building permit in Iroquois County, Illinois?

Unincorporated Iroquois County requires a building permit for covered building, construction and development projects, and starting without one can trigger a $1,000-per-day fine1. Applications go to the County Zoning Enforcement Officer on county forms15. Permitted projects require inspections, and the county directs applicants to contact the appropriate building, electrical and plumbing inspectors before construction2. Iroquois County’s application names the International Building Code, National Electrical Code and State Plumbing Code; the county code identifies the International Building Code edition as 20111617. Before moving into a permitted building or structure, obtain the county's Certificate of Completion; moving in without it can bring a $50-per-day fine18. Municipal building permits are handled locally in Watseka19, Gilman20, Village of Clifton21, Village of Onarga22. Septic and well permits stay with the Iroquois County Public Health Department countywide2324.

Who issues building permits in Iroquois County, and how do you reach them?

Iroquois County Planning & Zoning is the county counter for building, construction and development permit applications and zoning-classification questions in unincorporated areas315. Reach the office at (815) 432-7221 or visit 1001 East Grant Street, Watseka, IL 60970, Room 108C3. The building application asks for property identification, floodplain status, the proposed work and use, utilities, estimated cost, contractors, a plot plan, lot dimensions, setbacks, roads, well and septic locations, staking and building plans25. Septic permits and well permits are separate and go through the Iroquois County Public Health Department724. Reach Public Health at (815) 432-2483 or 1001 East Grant Street, Watseka, IL 60970, Room 11226. We could not confirm a current building-permit fee; ask Planning & Zoning for the amount3. For county-road access questions, contact the Highway Department at (815) 432-493627.

How do septic permits work in Iroquois County?

Iroquois County requires a septic permit to construct or repair a private sewage system; the county Public Health Department administers the program under county and Illinois rules65. The county's published price list gives a $100 septic-permit fee and a $150 inspection fee8. The county program inspects newly constructed or repaired systems and surveys existing systems for loan or environmental purposes, but the source does not say every existing system receives routine inspection28. Illinois also requires plan approval before new-system construction and qualifying major repairs, plus at least 48 hours' notice before work begins29. Iroquois County's mapped soils show 0% rated without severe limitations for a conventional drain field, so make system feasibility and design an early purchase contingency14. Contact Public Health at (815) 432-2483 before fixing the house site or sewage design26. Illinois approves privies, portable toilets, recirculation toilets, incinerator toilets and compost toilets for human waste only, and other household wastewater still needs a conventional private sewage system30.

Can you live in an RV or tiny home in Iroquois County?

In unincorporated Iroquois County, temporary sleeping or camping in a wheeled vehicle requires a temporary permit from the Zoning Enforcement Officer, and a travel trailer must be moved after 180 days31. The county's RV rule therefore does not provide an open-ended right to occupy a travel trailer while building9. A mobile home may be occupied as a dwelling only in a licensed and approved mobile-home park or as otherwise provided by the zoning ordinance; placing a mobile home or temporary structure on a lot for dwelling use otherwise requires authorization by temporary permit and compliance with its conditions3233. The zoning ordinance does not use the term tiny home, so Planning & Zoning decides how a proposed structure is classified; a structure used as a dwelling must meet the ordinance and the building code34. In the WF-1 Waterfront Residence District, a single-family residence must have at least 900 square feet, which rules out smaller designs there35. Other district schedules cite the same 900-square-foot floor10. Illinois allows a qualifying owner-occupant to perform plumbing on a single-family residence, subject to code, inspection and occupancy conditions, but that is not a general exemption from county permits or other trades1112.

What are the steps to build a home in Iroquois County?

  1. Confirm that the parcel is unincorporated and identify its zoning district3637.
  2. Review the district's lot size, setbacks, height and dwelling dimensions before finalizing plans38394010.
  3. Submit the county application with its required plot and building plans, and do not start covered construction before the permit is issued251.
  4. Arrange the required building, electrical and plumbing inspections before construction2.
  5. Secure the county septic permit and state-required plan approval before sewage-system work729.
  6. Obtain the well permit; the county procedure lists a $100 permit fee and a $150 inspection fee24.
  7. Obtain the Certificate of Completion before moving in18.

What should you check before buying land in Iroquois County?

Confirm the parcel's zoning district, dimensional rules and allowed dwelling type before closing373833. Make septic feasibility a purchase contingency because 0% of mapped county soils rate free of severe limitations for a conventional drain field14. Check floodplain status before siting improvements: county-regulated replacement work and additions must meet FEMA elevation and flood-proofing specifications, and some projects also need state authorization4142. Unincorporated Iroquois County lots must abut a public thoroughfare with at least 30 feet of frontage; driveway spacing and access-easement standards vary by district and road classification43. For driveways installed or changed under the county rule, openings may not exceed 24 feet at the street line or 30 feet at the roadway44. Work in a state right-of-way needs an IDOT permit45. If dividing land, county subdivision approval may apply; a qualifying agricultural division of at least 5 acres without new streets or access easements is exempt from that ordinance4647.

Watch-outs

  • Beginning covered construction without an Iroquois County permit can bring a $1,000-per-day fine1.
  • A travel trailer on an unincorporated lot needs a temporary permit and must be moved after 180 days9.
  • Moving into a permitted building without the county's Certificate of Completion can bring a $50-per-day fine18.

Sources

  1. Building/Construction/Development Permit Application, quoted and re-checked
  2. iroquoiscountyil.gov, quoted and re-checked
  3. Iroquois County Planning & Zoning (iroquoiscountyil.gov)
  4. Iroquois County Zoning Ordinance, quoted and re-checked
  5. Application for Permit to Construct or Repair a Private Sewage System, quoted and re-checked
  6. Application for Permit to Construct or Repair a Private Sewage System, quoted and re-checked
  7. Application for Permit to Construct or Repair a Private Sewage System, quoted and re-checked
  8. Iroquois County Public Health Department Price List, quoted and re-checked
  9. Iroquois County Zoning Ordinance, quoted and re-checked
  10. Iroquois County Zoning Ordinance, quoted and re-checked
  11. HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
  12. 225 ILCS 320/18 — Local regulation; Department standards (Illinois statewide rule), quoted and re-checked
  13. Well Program Procedure, quoted and re-checked
  14. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  15. Iroquois County Zoning Ordinance, quoted and re-checked
  16. Building/Construction/Development Permit Application, quoted and re-checked
  17. Iroquois County Code, Chapter 8, quoted and re-checked
  18. Building/Construction/Development Permit Application, quoted and re-checked
  19. Watseka: 11-1-2: Building Permits (Iroquois County), quoted and re-checked
  20. Gilman: Gilman Code, Title 18, §18.36.010 (Iroquois County), quoted and re-checked
  21. Village of Clifton: Code of Ordinances, Sec. 8-3. Building permit required (Iroquois County), quoted and re-checked
  22. Village of Onarga: Building permits required (Iroquois County), quoted and re-checked
  23. Application for Permit to Construct or Repair a Private Sewage System, quoted and re-checked
  24. Well Program Procedure, quoted and re-checked
  25. Building/Construction/Development Permit Application, quoted and re-checked
  26. Iroquois County Public Health Department (iroquoiscountyil.gov)
  27. Iroquois County Highway Department (iroquoiscountyil.gov)
  28. iroquoiscountyil.gov, quoted and re-checked
  29. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  30. 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
  31. Iroquois County Zoning Ordinance, quoted and re-checked
  32. Iroquois County Zoning Ordinance, quoted and re-checked
  33. Iroquois County Zoning Ordinance, quoted and re-checked
  34. Iroquois County Zoning Ordinance, quoted and re-checked
  35. Iroquois County Zoning Ordinance, quoted and re-checked
  36. Iroquois County Zoning Ordinance, quoted and re-checked
  37. Iroquois County Zoning Ordinance, quoted and re-checked
  38. Iroquois County Zoning Ordinance, quoted and re-checked
  39. Iroquois County Zoning Ordinance, quoted and re-checked
  40. Iroquois County Zoning Ordinance, quoted and re-checked
  41. Iroquois County Zoning Ordinance, quoted and re-checked
  42. Permit Program (Illinois statewide rule), quoted and re-checked
  43. Iroquois County Zoning Ordinance, quoted and re-checked
  44. Iroquois County Zoning Ordinance, quoted and re-checked
  45. Highway Permits (Illinois statewide rule), quoted and re-checked
  46. Subdivision Ordinance, quoted and re-checked
  47. Iroquois County Subdivision Ordinance, quoted and re-checked

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 5 of the neighbors with published rules, Iroquois County has countywide zoning.

RuleIroquois CountyFord CountyKankakee CountyLivingston CountyVermilion CountyWill CountyGrundy County
Building permitRequiredRequiredRequiredLimitedLimitedRequiredRequired
County zoningYesYesYesYesNot publishedYesYes
Septic permitsCounty Public Health Dept.County Public Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.

County locator

Iroquois County in Illinois

45
County map
Iroquois County highlighted among the Illinois counties · colored by Index score

How Iroquois County scores

Seclusion39100% ev.
Self-Sufficiency30100% ev.
Admin Boringness4390% ev.
Durability55100% ev.
Property Autonomy42100% ev.
Carry Cost58100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$152kTypical home
2%Property tax
$8,638Land / acre
38.8"Annual rain
1.5% of yrsSevere drought
5.8 / yr (+5.5)Mid-century 100°F days
13.6 daysMid-century dry spell
1.82" (+9.4%)Mid-century 1-day rain
1.74×Wildfire change factor
100%Forward climate coverage
$1,532Home insurance / yr
3.3% / yrInsurance growth
1.04%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
17,220People within 30 min
9,171,328People within 2 hr
17,993Radius comparison (15 mi)
23.4People / sq mi
0%Federal land
99.6%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
0 acWorkable land screen
3.8%Wooded land
71.8 tonsBiomass / forest ac
51.2°FAvg temp

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Cities and towns in Iroquois County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Artesia Township · Ash Grove Township · Ashkum Township · Village of Ashkum · Beaver Township · Beaverville Township · Village of Beaverville · Belmont Township · Village of Buckley · Village of Cissna Park · Concord Township · Crescent Township · Village of Crescent City · Danforth Township · Village of Danforth · Village of Donovan · Douglas Township · Fountain Creek Township · Iroquois Township · Village of Iroquois · Loda Township · Village of Loda · Lovejoy Township · Martinton Township · Village of Martinton · Middleport Township · Milford Township · Village of Milford · Milks Grove Township · Onarga Township · Papineau Township · Village of Papineau · Pigeon Grove Township · Prairie Green Township · Ridgeland Township · Sheldon Township · Village of Sheldon · Stockland Township · Village of Thawville · Village of Wellington · Village of Woodland

Answers from the rulebook for Iroquois County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Iroquois County rules

  • Building permitRequired

    Buildings, structures, alterations, and development covered by the county Building/Construction/Development Permit Application.

    • Construction must not begin until the permit is issued.
    • The application requires a fee and plot plan; building plans must accompany the application.
    • The county page states a $1,000-per-day fine for beginning construction without a permit.

    fine for beginning construction without permit: per 1000 USD per day

    “Construction must not be started until permit is issued.”
    One more reviewed finding on this topic
    • Required — Building, construction, and development projects subject to county permitting in unincorporated Iroquois County.
      “Be aware the county has established a fine of $1,000 per day for beginning construction without a permit”
  • Building code adoptedAdopted (with conditions)

    Building-code regulation under the Iroquois County Code.

    • The county code states that the International Building Code, 2011 edition, is adopted by reference.
    • Three copies are on file in the county clerk and recorder's office.
    • Agricultural exemptions appear separately in Section 8-21.

    International Building Code edition: 2011

    “There is hereby adopted by reference as if set out at length herein that publication known as the International Building Code, 2011 edition, recommended by International Code Council, Inc.”
    One more reviewed finding on this topic
    • Adopted (with conditions) — County building-code requirements associated with the Iroquois County building permit.
      “Iroquois County has adopted the International Building Code, National Electrical Code and State Plumbing Code.”
  • InspectionsRequired

    Projects requiring a county building permit.

    • The county directs applicants to contact the appropriate building/construction, electrical, and plumbing inspectors before construction.
    “Building code requires inspections for your permit. Please contact the appropriate inspector prior to any construction on your project-”
    One more reviewed finding on this topic
    • Required — County building permits.
      “Building code requires inspections for your permit.”
  • Certificate of occupancyRequired

    Moving into a permitted building or structure under the county permit application.

    • The application uses the term Certificate of Completion rather than Certificate of Occupancy.
    • The application states a $50-per-day fine for moving in without the Certificate of Completion.

    fine for moving in without Certificate of Completion: per 50 USD per day

    “There will be a FINE of $50.00 per day for moving in without Certificate of Completion.”
  • County-wide zoningPresent (with conditions)

    County zoning in unincorporated areas of Iroquois County.

    • The ordinance applies to all lands and waters within the unincorporated areas of Iroquois County.
    • Municipal areas are outside the stated jurisdiction of this county ordinance.
    “The jurisdiction of this ordinance shall include all lands and waters within the unincorporated areas of Iroquois County.”
    One more reviewed finding on this topic
    • Present (with conditions) — Zoning regulation in unincorporated Iroquois County.
      “The jurisdiction of this ordinance shall include all lands and waters within the unincorporated areas of Iroquois County.”
  • Local zoningPresent (with conditions)

    Land and waters within the unincorporated areas of Iroquois County.

    • The ordinance expressly applies to unincorporated areas only.
    • Municipal zoning administration was not established by the reviewed county sources.
    “The jurisdiction of this ordinance shall include all lands and waters within the unincorporated areas of Iroquois County.”
  • Zoning districtsPublished (with conditions)

    Zoning districts established by the Iroquois County Zoning Ordinance for unincorporated areas.

    • The certified Zoning Atlas is on file and may be viewed in the County Clerk's office.
    • District boundaries are established by the Zoning Atlas and ordinance rules.
    “For the purpose of this ordinance, the County of Iroquois is hereby divided into the following zoning districts”
    One more reviewed finding on this topic
    • Published (with conditions) — County zoning districts in unincorporated Iroquois County.
      “For the purpose of this ordinance, the County of Iroquois is hereby divided into the following zoning districts:”
  • Minimum dwelling sizeSpecified

    Residential buildings in county zoning districts where the cited bulk requirements apply.

    • The ordinance contains district-specific requirements; the cited examples require 900 square feet minimum total floor area or minimum total ground floor area.
    • Other districts and use categories may have different requirements.

    minimum total floor area: >= 900 square feet (district-specific)

    “Minimum Total Floor Area: 900 square feet”
    One more reviewed finding on this topic
  • Minimum lot sizeDistrict specific (with conditions)

    Development in the UR-1 Single Family Residential District in unincorporated Iroquois County.

    • With community sewer and water, the minimum buildable area is 6,000 square feet.
    • Without community sewer and water, the minimum area is 20,000 square feet.
    • The ordinance jurisdiction is limited to unincorporated areas of Iroquois County.

    minimum buildable area with community sewer and water: >= 6000 square feet · minimum area without community sewer and water: >= 20000 square feet

    “Minimum Buildable Area: 6,000 square feet”
    One more reviewed finding on this topic
    • Specified — Lots in specified county zoning districts.
      “Remaining homesite One Acre Minimum building lot size One Acre Structure must not exceed 20% of buildable lot area”
  • SetbacksSpecified

    Permitted and conditional uses in unincorporated Iroquois County, subject to the ordinance's agricultural exception and thoroughfare classifications.

    • Public utilities are exempt from the stated minimum setback provision.
    • The stated setback requirements do not pertain to agricultural uses described in Section 3.4(1)(b-1), but agricultural structures must comply.
    • Setbacks vary by thoroughfare: interstate and major state 100 feet, area service state 50 feet, county and township collectors/land-access roads 80 feet from center of road.

    county/township thoroughfare setback: 80 feet from center of road (thoroughfare classification applies)

    “All permitted and conditional uses (public utilities exempt) shall maintain a minimum setback in accord with the associated thoroughfare classification.”
    One more reviewed finding on this topic
    • Specified — Structures in county zoning districts and along classified thoroughfares.
      “Front: 80 feet from center of road Rear: 20 feet from property line Side: Minimum 8 and 15 feet from property line”
  • Lot coverageSpecified

    Structures in specified county zoning districts.

    • The cited district schedule limits structures to 20 percent of buildable lot area; other districts may have different limits.

    maximum structure coverage: <= 20 percent of buildable lot area (district-specific schedule)

    “Structure must not exceed 20% of buildable lot area”
  • Building heightSpecified

    Buildings in specified county zoning districts.

    • The cited district schedule provides a maximum height of 35 feet; Section 8 lists exceptions and modifications.

    maximum height: <= 35 feet (Section 8 exceptions and modifications)

    “Minimum Total Floor Area: 900 square feet Minimum Building Width: 22 feet Maximum Height: 35 feet”
    One more reviewed finding on this topic
    • Specified — Buildings in unincorporated county zoning districts.
      “BUILDING: Minimum Total Floor Area: 900 square feet Minimum Building Width: 22 feet Maximum Height: 35 feet”
  • Living in an RVLimited

    Wheeled vehicles designed for sleeping or camping and travel trailers used for dwelling purposes.

    • Temporary use requires a permit from the Zoning Enforcement Officer.
    • Travel trailers must be moved after 180 days.
    • Mobile homes may not be occupied as dwellings except in a licensed and approved mobile home park or as otherwise provided in the ordinance.

    maximum travel-trailer period: 180 days (must be moved after this period)

    “temporary usage of lots of record, either with or without dwellings may be permitted for wheeled vehicles designed for sleeping or camping”
    One more reviewed finding on this topic
    • Limited — Wheeled vehicles designed for sleeping or camping on temporary-use lots.
      “However, temporary usage of lots of record, either with or without dwellings may be permitted for wheeled vehicles designed for sleeping or camping by temporary permit from the Zoning Enforcement Officer. Travel Trailers must be moved after one hundred and eighty (180) days.”
  • Camping on your landLimited

    Temporary camping or sleeping in wheeled vehicles on lots of record.

    • A temporary permit from the Zoning Enforcement Officer is required.
    • Travel trailers must be moved after 180 days.

    travel-trailer duration: 180 days (must be moved after this period)

    “However, temporary usage of lots of record, either with or without dwellings may be permitted for wheeled vehicles designed for sleeping or camping by temporary permit from the Zoning Enforcement Officer. Travel Trailers must be moved after one hundred and eighty (180) days.”
    One more reviewed finding on this topic
    • Limited — Temporary camping or temporary use of lots by wheeled vehicles designed for sleeping or camping.
      “by temporary permit from the Zoning Enforcement Officer. Travel Trailers must be moved after one hundred and eighty (180) days.”
  • Tiny homesLimited

    A tiny home proposed for occupancy as a single-family residence in the unincorporated WF-1 Waterfront Residence District.

    • The ordinance applies only in unincorporated areas of Iroquois County.
    • WF-1 is limited to specified waterfront areas adjacent and contiguous to named rivers and streams, with frontage along those bodies of water; the ordinance states those areas are not in floodplains or floodways and generally front on county or township roads, subject to the stated road-maintenance exception.
    • WF-1 permits a single-family residence.
    • The buildable lot must be at least 20,000 square feet and 100 feet wide at the building line.
    • Required yards are 80 feet from the center of the road in front, 8 and 15 feet from the property line at the sides, and 20 feet from the property line at the rear.
    • The residence must have at least 900 square feet and be at least 22 feet wide; maximum ground coverage is 30% and maximum height is 35 feet.
    • Driveways intersecting county and township roads must be 400 feet apart, except that parallel driveways no more than 20 feet apart at the road entrance are permitted; easements must be at least 66 feet wide.

    minimum buildable lot size: >= 20000 square feet · minimum building-line width: >= 100 feet · minimum total floor area: >= 900 square feet · minimum building width: >= 22 feet · maximum ground coverage: <= 30 percent · maximum height: <= 35 feet

    “1) Single Family Residence [...] Minimum total floor area: 900 square feet”
    One more reviewed finding on this topic
    • Limited — Occupancy of a tiny home as a dwelling in the unincorporated areas of Iroquois County. The ordinance does not use the term tiny home; this claim applies its structure, temporary-dwelling, and mobile-home provisions to tiny homes used for dwelling purposes.
      “The jurisdiction of this ordinance shall include all lands and waters within the unincorporated areas of Iroquois County. [...] No structure shall be used for dwelling purposes that does not comply with the requirements of this ordinance or any applicable Building Codes.”
  • Manufactured homesLimited

    Occupancy of mobile homes as dwellings in the unincorporated areas subject to the Iroquois County Zoning Ordinance.

    • A mobile home may be occupied as a dwelling only when located in a licensed and approved mobile home park or as otherwise provided in the ordinance.
    • Mobile home parks with two or more mobile home units are conditional uses subject to the Mobile Home Park Regulations in Appendix B.
    • The zoning ordinance states that no mobile home may be erected or moved onto a lot and used for dwelling purposes unless authorized by a temporary permit and satisfying all conditions, except as otherwise provided.
    • The zoning ordinance requires the mobile home to meet ANSI A119.1 specifications.
    “No garage or other accessory building, mobile home, basement, partial or temporary structure whether of a fixed or portable construction shall be erected or moved onto a lot and used for any dwelling purposes unless authorized by the issuance of a temporary permit by the Zoning Enforcement Officer and satisfying all of the conditions thereof. However, temporary usage of lots of record, either with or without dwellings may be permitted for wheeled vehicles designed for sleeping or camping by temporary permit from the Zoning Enforcement Officer. Travel Trailers must be moved after one hundred and eighty (180) days. 8. Mobile Homes - No mobile home shall be occupied as a dwelling except when such mobile home is located in a licensed and approved mobile home park or as otherwise herein provided.”
    One more reviewed finding on this topic
    • Limited — Mobile-home dwelling occupancy in unincorporated areas.
      “No mobile home shall be occupied as a dwelling except when such mobile home is located in a licensed and approved mobile home park or as otherwise herein provided.”
  • Who permits septicCounty (with conditions)

    Private sewage-system permitting and inspection administered by the Iroquois County Public Health Department, Division of Environmental Health.

    • The application requires compliance with the Illinois Private Sewage Disposal Licensing Act and Code.
    • The county program may require periodic effluent sampling and necessary inspections.
    “Iroquois County Public Health Department Division of Environmental Health APPLICATION FOR PERMIT TO CONSTRUCT OR REPAIR A PRIVATE SEWAGE SYSTEM”
    2 more reviewed findings on this topic
  • Septic permitRequired

    Construction or repair of a private sewage system.

    • The county application is for a permit to construct or repair a private sewage system.
    • The 2014 environmental fee schedule lists a $100 septic permit fee.

    septic permit fee: 100 USD

    “APPLICATION FOR PERMIT TO CONSTRUCT OR REPAIR A PRIVATE SEWAGE SYSTEM”
  • Septic inspectionLimited

    Iroquois County Public Health Department inspections involving newly constructed or repaired septic systems, disposal sites, pumper trucks, and complaints.

    • The official source describes these as program services and does not state that inspection is categorically required for every existing septic system.
    • Existing septic systems are surveyed for loan/environmental purposes.
    • The program also issues permits for newly constructed or repaired septic systems.
    “Inspections of newly constructed or repaired septic systems [...] Surveying of existing septic systems for loan/environmental purposes”
  • Well permitRequired

    Private water wells on properties located in Iroquois County.

    • The county procedure requires a completed application, a $100 permit fee, and a $150 inspection fee.
    • The well driller must give the county 24-hour notice on completion so the well can be inspected.
    • Wells must be constructed according to the Illinois Water Well Construction Code.

    well permit fee: 100 USD · well inspection fee: 150 USD · completion inspection notice: 24 hours (notice by well driller)

    “Issue permits to install private water wells on properties located in Iroquois County”
    One more reviewed finding on this topic
    • Required — Private water wells in Iroquois County.
      “Issue permits to install private water wells on properties located in Iroquois County in accordance with state and local requirements”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural divisions of land into parcels of five acres or more.

    • The division must not involve any new streets or easements of access.
    • The exemption is from the Iroquois County Subdivision Ordinance requirements.

    minimum parcel size: >= 5 acres (no new streets or easements of access)

    “The division of land for agricultural purposes into parcels of five (5) acres or more in size which does not involve any new streets or easements of access.”
  • Subdividing landRegulated (with conditions)

    Subdivision plats and related improvements under the Iroquois County Subdivision Ordinance.

    • Final plats require county approval and must conform to the approved preliminary plat and the ordinance requirements.
    “The subdivider shall make application to the Iroquois County Board for approval of a final plat. The final plat submitted shall conform to the approved preliminary plat.”
  • Driveway accessLimited

    Lots and driveways in unincorporated Iroquois County.

    • All lots must abut a public thoroughfare with at least 30 feet of frontage.
    • Driveway spacing and access-easement rules vary by district and road classification; examples include 1,000 feet between arterial-road driveways and 66-foot access easements.
    • The cited zoning ordinance contains exceptions for parallel driveways.

    minimum public-thoroughfare frontage: >= 30 feet · arterial driveway spacing: >= 1000 feet (parallel driveways no more than 10 feet apart in cited A-1 provision) · access easement width: >= 66 feet (district-specific)

    “All driveways intersecting arterial roads, as designated shall be a minimum of 1000 feet apart”
    One more reviewed finding on this topic
    • Required — Driveways installed, altered, changed, replaced, or extended after the effective date of the zoning ordinance.
      “All driveways installed, altered, changed, replaced, or extended after the effective date of this ordinance shall meet the following requirements: 1. Openings for vehicular ingress and egress shall not exceed 24 feet at the street line and 30 feet at the roadway.”
  • Building in a floodplainLimited

    Replacement, modification, or additions to structures within flood plains in unincorporated Iroquois County.

    • Such work must meet FEMA or successor specifications pertaining to elevations and flood proofing.
    • The permit application asks whether the property is in a floodplain.
    “replacement, modification, or addition to structures within flood plains must also meet specifications set by the Federal Emergency Management Agency”
    One more reviewed finding on this topic
    • Limited — Replacement structures and additions in county-regulated floodplain areas.
      “replacement, modification, or addition to structures within flood plains must also meet specifications set by the Federal Emergency Management Agency, or its successors, pertaining to elevations and flood proofing.”
  • Permit feesPublished (with conditions)

    County environmental-health septic permits and inspections.

    • The county price list identifies a septic permit fee of $100 and septic inspection fee of $150.
    • The price-list PDF is labeled 'Price List 12-03-2025' in its source text.
    • An additional official environmental-fee schedule states it was revised 10/24/14; that revision stamp is not treated as an effective date.

    septic permit fee: 100 USD · septic inspection fee: 150 USD

    “SEPTIC PERMIT $100.00 SEPTIC INSPECTION FEE $150.00”
  • Permit processPartial

    County zoning permits in unincorporated Iroquois County.

    • Applications are made to the County Zoning Enforcement Officer on county-furnished forms.
    • The planning page lists building/construction/development and conditional-use permit applications.
    “Applications for a permit shall be made to the County Zoning Enforcement Officer on forms furnished by the County Zoning Enforcement Officer and shall include the following where applicable:”
    One more reviewed finding on this topic
    • Published (with conditions) — County building/construction/development permits.
      “Building Plans must accompany the Building Permit Application. Permit will not be issued without said documentation.”

Illinois rules that apply here

  • Owner-builder exemptionConditional

    Owner occupants or lessee occupants of single-family residences, and owners of single-family residences under construction for their own occupancy, performing plumbing planning, installation, alteration, or repair in Illinois.

    • The exemption is limited to plumbing work on the specified single-family residence; the cited statute does not establish a general owner-builder exemption for all construction trades or a statewide exemption from building permits.
    • The plumbing must comply with the minimum standards in the Illinois State Plumbing Code.
    • The plumbing is subject to inspection by the Illinois Department of Public Health or by the local governmental unit if it retains a licensed plumber as inspector.
    • The owner, owner occupant, or lessee occupant may not employ anyone other than a plumber licensed under the Illinois Plumbing License Law to assist.
    • An occupant must have taken possession of and be living in the premises as their bona fide sole and exclusive residence, or, for a residence under construction, expect to take possession and live there as that residence, with current intent to live there for at least 6 months after completion of the plumbing work or, for a residence under construction, at least 6 months after completion of construction.
    • Failure to possess and live in the premises as a sole and exclusive residence for 6 months or more creates a rebuttable presumption that the required intent was lacking.

    minimum occupancy period: >= 6 months (After completion of plumbing work; for a residence under construction, after completion of construction.)

    “Nothing herein contained shall prohibit the owner occupant or lessee occupant of a single family residence, or the owner of a single family residence under construction for his or her occupancy, from planning, installing, altering or repairing the plumbing system of such residence”
    2 more reviewed findings on this topic
    • Conditional — Privately funded construction in Illinois, including projects performed by an owner-builder, as to state-issued building permits, state plan review, state building-code inspections, and state occupancy permits.
      “No. If any of these are required, they would be addressed by the unit of local government.”
    • Conditional — Statewide treatment of local plumbing permits and inspections for qualifying owner occupants performing plumbing work on a single-family residence.
      “Nothing contained in this Act shall prohibit any city, town, village, township or county from providing for a Plumbing Inspector or from requiring permits for the installation and repair of plumbing and collecting a fee therefor, but a city, town, village, township, or county that requires a permit for installation and repair of plumbing may not issue that permit without verification that the applicant has a valid plumbing license or that the applicant is the owner occupant of a single family residence that is the subject of the permit.”
  • Off-grid sanitationAllowed (with conditions)

    Off-grid disposal of human wastes through privies, portable toilets, recirculation toilets, incinerator toilets, and compost toilets statewide in Illinois.

    • Other domestic wastes must be disposed of in a conventional private sewage disposal system.
    • Compost toilets may also be used for other organic domestic wastes.
    • Privies have construction, capacity, venting, maintenance, and abandonment requirements.
    • A privy pit must have a minimum capacity of 50 cubic feet per seat.
    • A privy must be pumped when filled to within 18 inches of the bottom of the riser.
    • Vault privies are required where groundwater or limestone formations are within 4 feet of the bottom of the pit.
    • Recirculating toilets must meet NSF International/ANSI Standard 41 and residuals must go to an approved public or private sewage disposal system.
    • Incinerator and compost toilets have separate maintenance and disposal requirements; compost toilets must meet NSF International/ANSI Standard 41.

    privy pit minimum capacity: >= 50 cubic feet per seat · privy pumping trigger: <= 18 inches from bottom of riser (Pump when filled to within this distance.) · vault-privy groundwater or limestone separation: < 4 feet from bottom of pit (Watertight, non-metal vaults are required where the condition applies.)

    “Privies, portable toilets, recirculation toilets, incinerator toilets and compost toilets are approved for private sewage disposal of human wastes.”
  • Short-term rentalsLimited

    Short-term rentals in Illinois where at least one room is rented for fewer than 30 consecutive days and accommodations are reserved in advance, when the hosting platform meets the statutory definition of a re-renter.

    • Beginning July 1, 2025, qualifying hosting platforms are subject to Hotel Operators’ Occupation Tax.
    • The source establishes tax and registration obligations, not statewide land-use permission; local zoning and licensing may separately apply.

    rental period: < 30 consecutive days

    “Beginning July 1, 2025, hosting platforms for short-term rentals that meet the definition of “re-renter” are subject to Hotel Operators’ Occupation Tax.”
  • Campground & park staysAllowed (with conditions)

    Overnight camping in Illinois campgrounds subject to the Campground Licensing and Recreational Area Act.

    • IDPH annually inspects and licenses campgrounds in Illinois.
    • The state campground definition includes camping and temporary parking of recreational vehicles.
    • Campgrounds within home rule units of government are exempt from the state campground licensing requirement.
    • Recreational areas without overnight camping, such as highway rest stops and picnicking areas, are subject to the rules but are not licensed or routinely inspected.

    minimum persons for statutory campground threshold: >= 10 persons · minimum camping duration for statutory campground threshold: >= 6 camping days per calendar year

    ““Camping Day” means any 24 hour period or portion thereof during which the participants remain overnight at the site.”
  • county building authorityLimited

    County building-construction and building-code regulation, including residential structures, in counties meeting the statutory population and metropolitan-area conditions.

    • The county must have a population not in excess of 1,000,000.
    • The county must be located in the area served by the Northeastern Illinois Metropolitan Area Planning Commission.
    • Rules are subject to rules or regulations adopted by the State Fire Marshal under the cited gasoline and volatile-oils statute.
    • The county must exempt municipalities located wholly or partly within the county when the municipal building code is equal to the county regulation and local authorities are enforcing that municipal code.
    • The rules apply throughout the county, but municipalities may establish higher standards.
    • The rules do not apply to construction or alteration of buildings or structures used or to be used for agricultural purposes on a tract zoned and used for agricultural purposes.
    • The county board must follow the publication and posting requirements in 55 ILCS 5/5-1063.
    • Beginning on the effective date of the amendatory Act of the 92nd General Assembly, a county adopting a new building code or amending an existing building code must provide the building-code identification to the Capital Development Board under Section 10.18 at least 30 days before adoption.
    • Violations are petty offenses, and enforcement is by an officer designated by county-board resolution.
    • The provision expressly authorizes county building-construction and building-code rules, but the opened text does not expressly use the phrase residential building permit requirement.

    population threshold: <= 1000000 persons (The county must be located in the area served by the Northeastern Illinois Metropolitan Area Planning Commission.) · pre-adoption identification period: >= 30 days (Applies to a new building code or amendment under the stated amendatory-Act provision.)

    “The county board in any county with a population not in excess of 1,000,000 located in the area served by the Northeastern Illinois Metropolitan Area Planning Commission may prescribe by resolution or ordinance reasonable rules and regulations (a) governing the construction and alteration of all buildings and structures and parts and appurtenances thereof and governing the maintenance thereof in a condition reasonably safe from the hazards of fire, explosion, collapse, contagion and the spread of infectious disease”
    One more reviewed finding on this topic
    • General — Illinois counties adopting and enforcing building codes and issuing building permits for residential construction in unincorporated areas, subject to the statewide baseline framework.
      “A municipality or county is not required to adopt building codes. If they do NOT adopt a building code then they are considered a non-building code jurisdiction and section 10.09-1 of the Capital Development Board Act (20 ILCS 3105) applies. If they do adopt a building code(s) then it must comply with section 10.18 of the Capital Development Board Act (20 ILCS 3105).”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Accessory dwellings — Accessory dwelling units.
  • Mandatory utility hookup — Water and sewer connection requirements.

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.

Living off-grid in Iroquois County, Illinois

Is Iroquois County a good place to live off-grid or homestead?

Iroquois County scores 45/100 on the Bolthole Index, a marginal county profile. Its strengths: higher long-term carry cost. Watch-outs: workable self-sufficiency basics (38.8″/yr rainfall) and sparse surroundings — about 17,220 people within a 30-minute drive.

Do you need a building permit in Iroquois County, Illinois?

Iroquois County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Iroquois County Public Health Department - Environmental Health. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Iroquois County?

Living in an RV on your own land in Iroquois County is limited to specific cases: Wheeled vehicles designed for sleeping or camping and travel trailers used for dwelling purposes. Temporary use requires a permit from the Zoning Enforcement Officer. Travel trailers must be moved after 180 days. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Iroquois County, Illinois?

Land in Iroquois County runs about $8,638 per acre, based on the latest county data.

What is the water situation in Iroquois County?

Iroquois County gets about 38.8" of rain a year, with severe drought in roughly 1.5% of years.

How remote is Iroquois County?

A representative private-land location has about 17,220 people within a 30-minute drive and 9,171,328 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Iroquois compares in Illinois

Compare side-by-side →See all 102 Illinois counties ranked →