Bolthole Index

Marion County, Illinois

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

74Index Score / 100
#10 of 102 in Illinois

Marion County, Illinois does not publish a clear county building-permit requirement, so confirm the parcel and project with county Zoning before building12. Illinois issues no building permits for private work; any permit comes from the local government with jurisdiction, and cities such as Marion zone their own land34. Septic permits outside public sewer come from the county Health Department56.

At a glance

Building permit
County requirement not confirmed; Illinois leaves any permit to the local government with jurisdiction13
Zoning
The county lists a Zoning function, but its coverage and district rules are not confirmed72
Septic permit
Required for private sewage systems outside public-sewer service; handled by county Environmental Health68
RV living
Long-term residential use on private land is not confirmed; ask county Zoning72
Tiny home
No county-specific occupancy or minimum-size rule confirmed; ask county Zoning72
Owner-builder exemption
Not confirmed for Marion County9
Private well
Permit required before constructing, modifying or sealing a well1011
Septic soil difficulty
Only about 0.5% of soils lack severe limits for a conventional drain field12

Who to call

Zoning

Marion County Zoning

First contact for county zoning and parcel-specific land-use questions

(618) 548-3853

100 E Main St., Salem, IL 62881

Septic permits

Marion County Health Department, Division of Environmental Health

Private sewage design review, permits and installation inspections, plus private-water environmental health services

618-548-3878 ext. 215

ccain@marionco.illinois.gov

118 Cross Creek Boulevard, Salem, Illinois 62881

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Marion County means bringing your own water and power. The kit we’d start with:

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

Marion County's building-permit requirement could not be confirmed from a county permit page or ordinance1. Illinois does not issue building permits, review plans or inspect privately funded construction; any such requirement is handled by the municipality, village, city or county with jurisdiction1314. Illinois nevertheless has statewide baseline building-code requirements, including rules for places that have not adopted their own code15. For land outside a city or village, call Marion County Zoning with the parcel number and a description of the proposed work before ordering plans or materials2. For land inside a municipality, ask that municipality because the applicable local government may set its own permit process3.

Who handles building and zoning questions in Marion County?

Marion County's official directory lists Zoning at the county courthouse, with a direct telephone line, but it does not list a separate building department2. The county Zoning contact is therefore the practical first stop for an unincorporated parcel, especially because no county building-permit or inspection rule could be confirmed12. Ask the office to identify the authority having jurisdiction, confirm whether the site is inside county or municipal jurisdiction, and state which approvals apply to the exact project16. Illinois permits a county to adopt and enforce building codes in unincorporated areas, but state law does not prove that Marion County has done so16. The State does not issue a private-project occupancy certificate either; any such document is local17.

Does Marion County have zoning?

Marion County's official directory lists a county Zoning function, but the geographic coverage, zoning map and district schedule could not be confirmed72. Illinois county zoning authority applies outside municipalities that have their own zoning ordinances, and actual setback and height limits come from the applicable local district or ordinance1819. That means a county-office listing alone does not establish the allowed use, minimum lot size, setback, building height or minimum home size for a specific parcel7. Ask Marion County Zoning to identify the parcel's jurisdiction and district before relying on a seller's description of the land2. If the parcel lies inside a city or village, obtain the rule from that municipality rather than assuming the county answer controls18. The City of Marion has its own zoning ordinance with named districts, and inside city limits it prohibits using an accessory structure as a dwelling; that city rule does not govern unincorporated county land420.

How do septic permits work in Marion County?

The Marion County Health Department's Division of Environmental Health reviews and approves private sewage designs, issues permits and inspects systems during installation in areas not connected to public sewer218. A new or replacement septic permit costs $75, and the published septic realty inspection fee is also $7511. A new or renovated system must be installed by an Illinois-licensed private sewage contractor or the homeowner, and permitted through the Health Department22. Illinois requires plan approval before construction of a new private sewage system begins and advance notice before the work starts23. Soil suitability deserves early attention: only about 0.5% of Marion County soils are rated without severe limitations for a conventional drain field12. That figure does not decide an individual lot, but it supports arranging design review and site evaluation before treating a conventional system as feasible1221. A private well follows a separate path: an Illinois Department of Public Health well-permit application and a $100 application fee come first, then 48 hours' notice to the Division of Environmental Health before installation248.

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

Residential RV occupancy and tiny-home occupancy on private land in Marion County could not be confirmed from a county ordinance7. Illinois campground regulation allows camping in licensed campgrounds, but that framework does not establish permission to live in a single RV on a private parcel25. A tiny home still needs an answer on allowed use, zoning dimensions, sanitation and the applicable building-code path7156. Illinois approves several off-grid human-waste options, including compost toilets, subject to technical requirements, while other domestic wastewater still requires a conventional private sewage disposal system26. Before moving an RV or tiny home onto land, ask Marion County Zoning about occupancy and placement and ask Environmental Health about wastewater disposal28.

Building a home in Marion County: the steps, in order

  1. Ask Marion County Zoning to confirm the parcel's jurisdiction, zoning district, allowed residential use and local approval path72.
  1. Confirm the applicable building-code and inspection route because Illinois has a statewide baseline but leaves private-project permits and inspections to local government1513.
  1. If public sewer is unavailable, take the site and preliminary house plan to Environmental Health for private sewage design review and a permit216.
  1. Submit the Illinois Department of Public Health well-permit application and $100 fee before constructing a private well, and give the Division of Environmental Health 48 hours' notice before installation2410.
  1. If access enters a state-maintained road, obtain the required IDOT right-of-way permit before work begins27.
  1. Schedule every locally required building inspection and the Health Department's septic inspection during installation1428.

What should you check before buying land in Marion County?

Start with jurisdiction and zoning because Marion County lists a Zoning function but does not publish enough detail to confirm a parcel's permitted uses or dimensions72. Investigate septic feasibility early because only about 0.5% of county soils are rated without severe limits for a conventional drain field12. Check flood mapping and permit exposure because regulated Illinois floodway construction requires state authorization under defined conditions29. Verify legal road access, and remember that work in a state-maintained right-of-way needs an IDOT permit27. Marion County is mostly gentle terrain, with about 91.8% of land at a slope of 15% or less, but parcel-level drainage and soil conditions still matter30. The effective property-tax rate is about 1.7%, with a median annual bill near $1,7093132.

Watch-outs

  • A county Zoning listing is not proof that every Marion County parcel has the same zoning rules; confirm jurisdiction and district with the office72.
  • No Marion County owner-builder exemption could be confirmed, so ask the authority having jurisdiction before assuming self-performed work changes permit or inspection requirements916. Illinois lets an owner who will live in a single-family home do the plumbing, but that exemption covers plumbing only, not building permits generally33.
  • Conventional septic conditions are difficult across nearly all county soils, so make wastewater feasibility a purchase contingency rather than a post-closing task12.

Sources

  1. Illinois Codes FAQ (2026 county census)
  2. Marion County Zoning (marioncountyil.gov)
  3. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  4. Zoning Ordinance, City of Marion, Illinois, quoted and re-checked
  5. Private Sewage Program, quoted and re-checked
  6. Private Sewage Disposal, quoted and re-checked
  7. Marion County, Illinois - Contact/Departments (2026 county census)
  8. Marion County Health Department, Division of Environmental Health (marioncountyhealthdept.org)
  9. HB5913 Enrolled — Illinois Plumbing License Law amendment (2026 county census)
  10. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  11. Permit Fees | Marion County Health Department, quoted and re-checked
  12. 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
  13. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  14. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  15. Building Codes and Regulations (Illinois statewide rule), quoted and re-checked
  16. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  17. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  18. ilga.gov (Illinois statewide rule), quoted and re-checked
  19. 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
  20. Zoning Ordinance, City of Marion, Illinois, quoted and re-checked
  21. Private Sewage Disposal, quoted and re-checked
  22. Marion County Full Board Meeting Minutes, February 25, 2025, quoted and re-checked
  23. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  24. Private Water Program, quoted and re-checked
  25. Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
  26. 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
  27. Highway Permits (Illinois statewide rule), quoted and re-checked
  28. Private Sewage Program, quoted and re-checked
  29. Permit Program (Illinois statewide rule), quoted and re-checked
  30. Share of land at 15% slope or less: Bolthole Index county data
  31. Effective property tax rate: Bolthole Index county data
  32. Median property tax bill: Bolthole Index county data
  33. HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked

Written October 10, 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

Unlike 5 of its 6 neighbors, Marion County requires a building permit only in limited cases.

RuleMarion CountyFayette CountyJefferson CountyClay CountyClinton CountyEffingham CountyBond County
Building permitLimitedLimitedRequiredNot requiredRequiredNot requiredRequired
County zoningYesYesYesNoYesNoYes
Septic permitsCounty Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.

County locator

Marion County in Illinois

74
County map
Marion County highlighted among the Illinois counties · colored by Index score

How Marion County scores

Seclusion61100% ev.
Self-Sufficiency70100% ev.
Admin Boringness7090% ev.
Durability60100% ev.
Property Autonomy42100% ev.
Carry Cost64100% 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 →

$122kTypical home
1.7%Property tax
$6,108Land / acre
44.7"Annual rain
1.7% of yrsSevere drought
11.6 / yr (+10.5)Mid-century 100°F days
15.3 daysMid-century dry spell
2.01" (+6.2%)Mid-century 1-day rain
1.86×Wildfire change factor
100%Forward climate coverage
$1,504Home insurance / yr
3.7% / yrInsurance growth
1.29%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
13,943People within 30 min
2,681,102People within 2 hr
23,780Radius comparison (15 mi)
64.1People / sq mi
0.1%Federal land
91.8%Land at 15% slope or less
0.5%Soils rated "not limited" for septic (strict USDA rating)
1,908 acWorkable land screen
30.5%Wooded land
45.7 tonsBiomass / forest ac
54.9°FAvg temp

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Cities and towns in Marion 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: Alma Township · Village of Alma · Carrigan Township · Village of Central City · Centralia Township · Foster Township · Haines Township · Iuka Township · Village of Iuka · Village of Junction City · Village of Kell · Kinmundy · Kinmundy Township · Meacham Township · Odin Township · Village of Odin · Omega Township · Patoka Township · Village of Patoka · Raccoon Township · Romine Township · Salem · Salem Township · Sandoval Township · Village of Sandoval · Stevenson Township · Tonti Township · Village of Vernon · Village of Walnut Hill

Answers from the rulebook for Marion County

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

Marion County rules

  • Who permits septicMixed (with conditions)

    Private sewage systems in Marion County.

    • IDPH regulates private sewage disposal statewide.
    • The Marion County Health Department administers permitting locally under the Illinois Private Sewage Disposal Licensing Act and Code.
    “The private sewage program is performed in accordance with the Illinois Department of Public Health’s Private Sewage Disposal Licensing Act and Code”
    One more reviewed finding on this topic
    • County — Private sewage systems in Marion County administered through the Marion County Health Department.
      “The local health department works to protect public health and the environment by reviewing and approving system designs, issuing permits, and performing inspections during installation to ensure compliance with state and local codes.”
  • Septic permitRequired

    Any new or renovated private sewage system in Marion County.

    • The system must be installed by an Illinois-licensed private sewage contractor or the homeowner.
    • The permit is through the Marion County Health Department.
    • IDPH rules and code apply.
    “Any new or renovated system must be installed by an Illinois licensed private sewage contractor or the homeowner and permitted through the Marion County Health Department.”
  • Septic inspectionRequired

    Private sewage system installation in Marion County.

    • Inspections occur during installation.
    • The health department may enter the property to conduct the inspection.
    “The local health department works to protect public health and the environment by reviewing and approving system designs, issuing permits, and performing inspections during installation to ensure compliance with state and local codes.”
  • Well permitRequired

    Private water well installation in Marion County, Illinois.

    • Before installation, the Illinois Department of Public Health Application for Permit to Construct, Modify or Abandon a Water Well must be submitted.
    • The $100.00 application fee payable to the Illinois Department of Public Health must be submitted.
    • A permit is granted only if the proposed water well meets the Illinois Water Well Construction Code.
    • The applicant must give 48 hour notification to the Division of Environmental Health prior to installation.
    • Community water wells are excluded from the IDPH private-water program described in the statewide source.

    application fee: 100 USD (payable to the Illinois Department of Public Health) · installation notice: 48 hours (notification to the Division of Environmental Health prior to installation)

    “Before a private water well can be installed, Illinois Department of Public Health, Application for Permit to Construct, Modify or Abandon a Water Well and the $100.00 application fee payable to the Illinois Department of Public Health must be submitted. If the proposed water well meets the requirements of the Illinois Water Well Construction Code, the applicant will be granted a permit. It is then the responsibility of the applicant to give 48 hour notification to the Division of Environmental health prior to installation.”
  • Permit feesPublished

    Marion County Health Department environmental-health permits and inspections.

    • The published fee schedule lists environmental-health fees; it does not establish building-permit fees.
    • The page lists the Marion County Health Department Division of Environmental Health as the administering office.

    new well permit: 100 USD · existing well/testing: 25 USD · new/replacement septic permit: 75 USD · septic realty inspection: 75 USD · water realty inspection: 75 USD

    “Water Permits | | New Well | $100.00 | Existing Well/Testing | $25.00 Septic Permit | | New/Replacement | $75.00 Reality Inspection | | Septic | $75.00 | Water | $75.00”
  • Permit processPartial

    Marion County Health Department private-water and private-sewage permitting processes.

    • Private sewage applications involve design review, permit issuance, and installation inspections.
    • Private wells require an IDPH application and fee, plus 48-hour notice to county environmental health before installation.
    “The local health department works to protect public health and the environment by reviewing and approving system designs, issuing permits, and performing inspections during installation to ensure compliance with state and local codes.”
  • County-wide zoningPresent

    The county lists a Zoning function (administered through the Supervisor of Assessments office), indicating countywide zoning is administered.

    Marion County, Illinois - Contact/Departments ↗Scouted from the county site, not yet independently re-checked

Illinois rules that apply here

  • Building permitLimited

    Privately funded construction in Illinois; the State does not itself issue building permits, while any required permit is addressed by the applicable local government.

    • Permit requirements may be imposed and administered by the municipality, village, city, or county having jurisdiction.
    • The Illinois Capital Development Board states that statewide building codes became effective 1/1/2025, while local code officials remain the best source for project-specific answers.

    statewide building-code effective date: 2025-01-01

    “No. If any of these are required, they would be addressed by the unit of local government.”
    One more reviewed finding on this topic
    • Not required — Issuance of building permits by the State of Illinois for privately funded construction.
      “No. If any of these are required, they would be addressed by the unit of local government.”
  • 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.”
  • Building code adoptedPartial

    Building-code requirements statewide in Illinois, including residential and commercial construction subject to the Capital Development Board Act baseline requirements.

    • Effective 2025-01-01, Illinois requires statewide baseline building-code requirements.
    • Local governments may adopt building codes, but they are not required to adopt codes; jurisdictions that do not adopt a code are treated as non-building-code jurisdictions and must follow the applicable state-law baseline requirements.
    • For jurisdictions with adopted codes, local codes must regulate structural design at least as stringently as the applicable IRC, IBC, or IEBC baseline.
    • Commercial buildings in non-building-code jurisdictions and state-funded buildings are subject to the state-listed codes and qualified-inspection requirements.
    • Residential requirements differ depending on whether the jurisdiction has adopted a compliant building code and whether the home purchaser and builder agree to an alternative code.

    statewide baseline effective date: 2025-01-01 · local code structural minimum for residential buildings: IRC minimum structural requirements · local code structural minimum for commercial new buildings: IBC minimum structural requirements · local code structural minimum for existing commercial buildings: IEBC minimum structural requirements

    “The State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide building codes effective 1/1/2025. [...] Commercial buildings in jurisdictions that have not adopted a building code AND state funded buildings. [...] Starting 1/1/25 local codes must regulate the structural design in a manner that is at least as stringent as the IBC© for new buildings or IEBC© for existing buildings. [...] Residential buildings in jurisdictions that have not adopted a building code where agreed to by the home purchaser and home builder. [...] Residential buildings in jurisdictions that have adopted a building code. [...] Starting 1/1/25 local codes must regulate the structural design in a manner that is at least as stringent as the IRC©.”
    4 more reviewed findings on this topic
    • Adopted — Statewide Illinois building-code baseline applicable to construction in Marion County, including jurisdictions that have not adopted a local building code.
      “The State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide building codes effective 1/1/2025.”
    • Partial — New residential construction in Illinois, including non-building-code portions of Marion County outside incorporated municipalities.
      “The State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide building codes effective 1/1/2025.”
    • Adopted — Statewide Illinois building-code baseline requirements, including residential and commercial construction in Marion County.
      “Please be advised that the State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide baseline building codes effective 1/1/2025. Locally adopted building codes must comply with the requirements of the Act.”
    • Adopted — Statewide baseline building-code requirements for residential construction in Illinois, including jurisdictions with and without locally adopted building codes.
      “Please be advised that the State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide baseline building codes effective 1/1/2025. Locally adopted building codes must comply with the requirements of the Act.”
  • InspectionsLimited

    Privately funded construction statewide in Illinois, as to inspections performed by the State rather than by a local authority having jurisdiction.

    • The Illinois Capital Development Board does not perform building-code inspections for privately funded construction.
    • If inspections are required, they are addressed by the applicable unit of local government.
    • A local municipality or county may be a non-building-code jurisdiction, in which case applicable state baseline requirements and inspection-certification provisions may apply.
    “No. If any of these are required, they would be addressed by the unit of local government.”
    One more reviewed finding on this topic
    • Not required — Building-code-compliance inspections performed by the State of Illinois for privately funded construction.
      “No. If any of these are required, they would be addressed by the unit of local government.”
  • Certificate of occupancyLimited

    Occupancy permits or certificates for privately funded construction in Illinois.

    • The State does not issue occupancy permits for privately funded construction.
    • If an occupancy permit is required, it is addressed by the applicable unit of local government.
    “No. If any of these are required, they would be addressed by the unit of local government.”
    One more reviewed finding on this topic
    • Not required — Issuance of occupancy permits or certificates by the State of Illinois for privately funded construction.
      “No. If any of these are required, they would be addressed by the unit of local government.”
  • SetbacksDistrict specific (with conditions)

    County zoning regulations for building or setback lines outside municipalities with municipal zoning ordinances.

    • The actual setback distances are established by applicable county zoning districts or other local ordinances.
    • Agricultural buildings may be required to conform to building or setback lines.
    “to establish building or setback lines”
  • Building heightDistrict specific (with conditions)

    County zoning districts outside municipalities with municipal zoning ordinances.

    • The applicable county zoning ordinance determines the actual height limit by district or use.
    • No single statewide height measurement was identified.
    “including height of buildings and structures”
  • Manufactured homesAllowed (with conditions)

    Occupancy of manufactured homes as dwellings, including occupancy in manufactured home communities regulated by IDPH.

    • Manufactured home communities with 5 or more sites must be licensed by IDPH, except communities located in home rule units.
    • IDPH annually inspects licensed communities for renewal, including water, sewage disposal, electrical systems, lighting, roads, spacing of homes, and garbage disposal.
    • Manufactured homes moved since January 1, 1980 must be secured using equipment meeting IDPH standards.
    • Effective December 31, 2001, manufactured homes must be installed by an Illinois licensed manufactured home installer or the homeowner and installed according to manufacturer instructions; if unavailable, the IDPH Manufactured Home Installation Code applies.
    • Local zoning, building, floodplain, and utility requirements may also apply.

    manufactured home community license threshold: >= 5 sites (Communities located in home rule units are excepted from this IDPH licensing statement.) · moved-home tiedown requirement effective date: >= 1980-01-01 · installation requirement effective date: >= 2001-12-31

    “designed and situated so as to permit its occupancy as a dwelling place for one or more persons”
  • 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.”
  • Driveway accessRequired

    Work within the right-of-way of an Interstate, U.S. state route, Illinois state route, or state-maintained roadway, including access-driveway requests to State highways.

    • A permit must be obtained before work begins.
    • Requirements may vary by IDOT district; the applicant must contact the district office for specific requirements.
    • IDOT's access-driveway handbook guides what is allowable for highway access requests.
    “Per 605 ILCS 5/4 209, IDOT requires a permit when working within the right-of-way of an Interstate, U.S. state route, Illinois state route, or state maintained roadway. A permit must be obtained prior to the start of any work and a copy of the approved permit must be at the worksite at all times.”
  • Building in a floodplainRequired

    Construction activities in regulated Illinois floodways and, where a floodway has not been delineated, generally work anywhere in the floodplain.

    • For downstate streams, IDNR Division permitting applies to floodways of streams draining at least one square mile in urban areas or ten square miles in rural areas.
    • In northeastern Illinois, Part 3708 applies to identified floodways in Cook County excluding Chicago, DuPage, Kane, Lake, McHenry, and Will Counties.
    • Some minor activities are automatically authorized by statewide or regional permits if their terms and conditions are met.
    • For State-owned property, Part 3710 requires a permit for all development activity in FEMA-mapped floodplains.

    urban stream drainage area threshold: >= 1 square mile (regulated floodways under Part 3700) · rural stream drainage area threshold: >= 10 square miles (regulated floodways under Part 3700)

    “All construction activities in the floodways of streams (the channel and the adjacent portion of the floodplain that is needed to safely convey and store flood waters) in urban areas where the stream drainage area is one square mile or more or in rural areas where the stream drainage area is ten square miles or more must be permitted by the Division prior to construction.”
  • 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).”

Inside cities and towns in Marion County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

  • Zoning districtsPublished

    Zoning districts in the City of Marion zoning jurisdiction.

    • This claim is limited to the City of Marion and does not establish countywide zoning districts.
    “For the purposes of this ordinance, the City of Marion is divided into the following districts:”
  • Accessory dwellingsProhibited

    Use of an accessory structure as a dwelling within the City of Marion zoning jurisdiction.

    • This claim is limited to the City of Marion and does not establish a countywide rule.
    “Use As A Dwelling: Use of an accessory structure as a dwelling is prohibited in the City of Marion.”

Still unanswered

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

  • Local zoning — Zoning administered by municipalities or other local authorities within Marion County.
  • Minimum dwelling size — Minimum dwelling size in unincorporated Marion County.
  • Minimum lot size — Minimum lot size in unincorporated Marion County.
  • Lot coverage — Lot coverage in unincorporated Marion County.
  • Living in an RV — Long-term or residential RV occupancy in unincorporated Marion County.
5 more unanswered
  • Camping on your land
  • Tiny homes
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land

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 Marion County, Illinois

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

Marion County scores 74/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and workable self-sufficiency basics (44.7″/yr rainfall).

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

Marion County requires a building permit only in limited cases (such as floodplains or specific zones), and it enforces county zoning. Onsite septic is permitted by Marion County Health Department, Division of 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.

How much does land cost in Marion County, Illinois?

Land in Marion County runs about $6,108 per acre, based on the latest county data.

What is the water situation in Marion County?

Marion County gets about 44.7" of rain a year, with severe drought in roughly 1.7% of years.

How remote is Marion County?

A representative private-land location has about 13,943 people within a 30-minute drive and 2,681,102 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 Marion compares in Illinois

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