Clay County, IL: No Building Permit, No Zoning

Unincorporated Clay County, Illinois generally does not require a county building permit for a home, although the county has not published a direct permit statement and buyers should confirm before building¹. Countywide zoning appears absent, but the City of Flora has its own zoning ordinance and adopts its own building codes, so Flora building permits and zoning approval come from the city^1,2,3. Septic permits and private well permits are handled by the Clay County Health Department, not by a city^4,5.

At a glance

Building permit (unincorporated): Generally not required, but confirm with Clay County before building¹
Countywide zoning: No countywide zoning program identified; confirm parcel-specific rules with the county and municipality¹
Septic permit: Required through the Clay County Health Department before installation⁴
Private well permit: Required through the Clay County Health Department before construction⁵
RV or tiny-home living: No countywide private-land occupancy rule was confirmed; ask the county and municipality¹
Owner-builder: A narrow plumbing exemption applies; no general construction exemption was confirmed⁶
Inside Flora: Flora has municipal zoning, adopted building codes and local permitting^2,3
Conventional septic soils: Only 3.4% of soils lack severe drain-field limitations⁷

Who to call

Health department

Clay County Health Department, Division of Environmental Health

Private sewage disposal and private water well permits and inspections in Clay County

(618) 662-4406

601 E 12th St, Flora, IL

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

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

Unincorporated Clay County generally does not require a county residential building permit, but we could not confirm that answer in a direct county permit statement; request written confirmation for the parcel and project before starting work¹. Illinois has had a statewide building-code baseline since 2025, with different treatment for jurisdictions that have and have not adopted local codes⁸. The state does not perform building-code inspections for privately funded construction; any required inspection is handled by the applicable county or municipality⁹. Qualifying new residential construction is exempt from the state's certification-of-inspection requirement, but that exemption does not resolve a separate local inspection or occupancy requirement^10,11. Inside Flora, the city reviews plans, performs inspections and issues permits under its adopted codes³.

Who handles building permits, zoning and septic permits in Clay County, Illinois?

Clay County has not identified a county building department or published an accessible page that directly answers whether unincorporated residential construction needs a county permit.

Clay County has not identified a county building department or published an accessible page that directly answers whether unincorporated residential construction needs a county permit¹. The State of Illinois does not serve as the local inspection office for privately funded work, so unresolved permit, inspection and occupancy questions must go to the applicable local government⁹. Ask the Clay County Engineer about setbacks and entrance or culvert requirements before fixing a house location. For septic and well work, contact the Clay County Health Department, Division of Environmental Health, at 601 E 12th St, Flora, IL, or (618) 662-4406¹². Building permits and zoning approval for projects inside Flora go to Flora's Building & Zoning Department because the city administers zoning and its own adopted codes^2,3. Septic permits stay with the Clay County Health Department, which regulates private sewage disposal systems in Clay County⁴.

Does Clay County have zoning?

Clay County appears to have no countywide zoning program, but we could not confirm that conclusion in an official county statement.

Clay County appears to have no countywide zoning program, but we could not confirm that conclusion in an official county statement¹. Do not translate that into no land-use rules: Clay County's official Engineer/Highway page links a building setback ordinance, and its scope and parcel-level effect need confirmation from the County Engineer. Illinois law allows a county zoning ordinance, where one applies, to establish setback lines and height limits by district¹³. Flora has municipal zoning for development within the city and territory along its borders shown on the city's official maps². Louisville requires buildings within village limits to sit at least 20 feet from the front lot line and 10 feet from the side and rear lot lines, subject to stated exceptions and variances¹⁴. Before buying, ask the county and relevant municipality in writing about zoning, setbacks, minimum lot size, allowed uses, and overlays for the exact parcel.

How do septic and well permits work in Clay County?

Before installing a private sewage system in Clay County, submit the plan-review application and fee to the Clay County Health Department; approval depends on compliance with the state sewage code, and the department requires at least 24 hours' notice before installation⁴. The Health Department provides local permit review and inspection, while IDPH regulates covered private sewage systems at the state level^4,15. Only 3.4% of Clay County soils lack severe limitations for a conventional drain field, so obtain a site evaluation before committing to a house location⁷. A new or renovated septic system generally cannot be approved when an eligible sanitary sewer is available within 300 feet of residential property, subject to the rule's exceptions¹⁶. New private wells require permits and inspections through IDPH and local health departments; Clay County's process calls for a $100 fee and at least 24 hours' notice before construction^5,17.

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

Clay County has not published a confirmed countywide rule allowing or prohibiting long-term RV occupancy or tiny-home occupancy on private land.

Clay County has not published a confirmed countywide rule allowing or prohibiting long-term RV occupancy or tiny-home occupancy on private land¹. Illinois campground licensing does not answer that private-parcel question because it applies to qualifying campgrounds that meet statutory thresholds¹⁸. A tiny home intended for occupancy still needs a compliant water source and either a public sewer connection or a code-compliant private sewage system¹⁹. Illinois permits specified alternative toilets for human waste, but other domestic wastewater still requires a conventional disposal system, and the septic tank cannot be smaller than 750 gallons²⁰. Manufactured homes follow separate state installation rules, and qualifying parks require licensing²¹. Ask Clay County and the applicable municipality for a written answer covering full-time occupancy, duration, utilities, setbacks, and address assignment before moving an RV or tiny home onto the parcel.

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

Confirm whether the parcel is unincorporated or inside Flora or another municipality; Flora administers municipal zoning and adopted building codes.

Confirm whether the parcel is unincorporated or inside Flora or another municipality; Flora administers municipal zoning and adopted building codes^2,3.

Ask Clay County for written confirmation of building-permit, local inspection, occupancy, zoning and setback requirements because the county-specific answers remain incompletely documented^1,9.

Contact the Clay County Health Department at 601 E 12th St, Flora, IL, or (618) 662-4406, and complete septic review before installation^4,12.

If the house needs a private well, obtain the well permit before construction and give the required advance notice⁵.

If work affects a regulated waterway, floodway, floodplain or wetland, use the joint-permit process; ask IDNR for a free determination of whether authorization and a review fee are required^22,23,24.

For access onto a state-maintained road, obtain the required state highway permit before right-of-way or driveway work²⁵.

What should you check before buying land in Clay County?

Start with septic feasibility: only 3.4% of county soils lack severe limitations for a conventional drain field, making an early site evaluation valuable.

Start with septic feasibility: only 3.4% of county soils lack severe limitations for a conventional drain field, making an early site evaluation valuable⁷. Check whether a sanitary sewer is close enough to trigger the state connection rule before budgeting for septic¹⁶. Ask Clay County about its building setback ordinance, culvert or entrance policy, and floodplain status because zoning and driveway rules were not fully confirmed. A driveway connecting to a state-maintained route requires a state highway permit²⁵. Land disturbance of at least 1 acre may require state construction-stormwater coverage and an application fee, so include erosion control in early site planning²⁶. Clay County land is mostly gentle, with 96.2% at a slope of 15% or less, while 21.9% is wooded⁷. Typical property tax is about 1.6%, with a median annual bill near $1,523 and a typical home value of about $110,745⁷.

Watch-outs

Clay County has not published a direct answer on residential permits or separate local inspection and occupancy requirements for unincorporated construction; request written confirmation before work begins^1,11.
Clay County appears to have no countywide zoning, but parcel-specific setback coverage should be confirmed with the County Engineer¹.
Rules inside Flora differ because Flora has municipal zoning and its own adopted building codes^2,3.
A surface-discharging septic system may need separate pollution-discharge coverage when effluent reaches waters of the United States⁴.

Sources

26 official pages, each quoted and re-checked · written October 9, 2026

Written October 9, 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.

Off-grid gear

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

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Compared with neighboring counties

Like 5 of its 6 neighbors, Clay County has no countywide zoning.

Rule	Clay County	Effingham County	Richland County	Marion County	Jasper County	Wayne County	Fayette County
Building permit	Not required	Not required	Required	Not required	Not required	Not required	Limited
County zoning	No	No	No	No	No	No	Yes
Septic permits	County Health Dept.	County Health Dept.	IL Dept. of Public Health	County Health Dept.	County Health Dept.	County Health Dept.	County Health Dept.

Cities and towns in Clay 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 covered: Bible Grove Township · Blair Township · Clay City Township · Village of Clay City · Harter Township · Hoosier Township · Village of Iola · Larkinsburg Township · Louisville Township · Oskaloosa Township · Pixley Township · Village of Sailor Springs · Songer Township · Stanford Township · Xenia Township · Village of Xenia

Answers from the rulebook for Clay County

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

Clay County rules

Who permits septicLocal
Local review of private sewage disposal system construction plans in Clay County by the Clay County Health Department as the county health agency listed by IDPH.
- IDPH states that local health agencies review sewage disposal system construction plans either under local ordinance or as agents of IDPH.
- The IDPH directory identifies the Clay County Health Department as serving Clay County.
“Program activities include the issuance of construction permits, the inspection of new or existing sewage disposal systems, and complaint investigations. The program regulates all private sewage disposal systems that treat a flow of 1,500 gallons per day or less.”
Private Sewage Disposal ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- County — Private sewage disposal permitting and inspections in Clay County
  “Program activities include the issuance of construction permits, the inspection of new or existing sewage disposal systems, and complaint investigations. The program regulates all private sewage disposal systems that treat a flow of 1,500 gallons per day or less.”
  Private Sewage | Clay County Health Department ↗Re-checked Sep 10, 2026
Septic permitRequired
Installation of a private sewage disposal system in Clay County
- Before installation, a Private Sewage Disposal Plan Review Application and application fee must be submitted to the Health Department for approval.
- A permit is granted only if the proposed system meets the IDPH Private Sewage Disposal Code and Private Sewage Disposal Licensing Act.
- The applicant must notify the health department at least 24 hours before installation.
- Surface-discharging systems discharging to Waters of the United States also require NPDES General Permit coverage; the Clay County page states that permit took effect February 10, 2014.
notification lead time: >= 24 hours minimum
“Before a private sewage disposal system can be installed in Clay County, a Private Sewage Disposal Plan Review Application and an application fee must be submitted to the Health Department for approval. The applicant will be granted a permit if the proposed system meets the requirements of the IDPH Private Sewage Disposal Code and the Private Sewage Disposal Licensing Act. It is the applicant’s responsibility to notify the health department a minimum of 24 hours prior to installation.”
Private Sewage | Clay County Health Department ↗Re-checked Sep 10, 2026
Well permitRequired
Construction of a private water well in Clay County
- An application and $100 application fee payable to IDPH must be submitted to the Clay County Health Department before construction.
- The applicant must notify the health department at least 24 hours before construction.
- The county program also issues construction permits and inspects new water well construction.
application fee: 100 USD (Payable to the Illinois Department of Public Health.) · construction notification lead time: >= 24 hours minimum
“Clay County Health Department administers the private water program under the authority of the Illinois Water Well Construction Code. Before a private water well can be constructed in Clay County an application and the $100.00 application fee, payable to the Illinois Department of Public Health, must be submitted to the Clay County Health Department. It is the applicant’s responsibility to notify the health department a minimum of 24 hours prior to construction.”
Potable Water Supplies | Clay County Health Department ↗Re-checked Sep 10, 2026
County-wide zoningAbsent
The county's own offices list no planning or zoning department; only individual townships (e.g., Clay Township) have their own zoning ordinances, indicating no countywide zoning.
Clay County, Illinois - Official Website ↗From the county’s own site, awaiting a second reviewer

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.”
Illinois Codes FAQ ↗Re-checked Sep 26, 2026
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.”
  Illinois Codes FAQ ↗Re-checked Sep 9, 2026
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”
HB5913 Enrolled — Illinois Plumbing License Law amendment ↗Re-checked Oct 4, 2026
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.”
  Illinois Codes FAQ ↗Re-checked Oct 4, 2026
- 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.”
  225 ILCS 320/18 — Local regulation; Department standards ↗Re-checked Oct 4, 2026
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©.”
Illinois Codes ↗Re-checked Sep 9, 2026
3 more reviewed findings on this topic
- Adopted (with conditions) — Statewide Illinois building-code baseline applicable to jurisdictions including Clay County, subject to the statutory distinctions for jurisdictions that have or have not adopted local building codes.
  “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. Until then, units of local government such as cities and counties can adopt codes of their choice.”
  Building Codes and Regulations ↗Re-checked Sep 26, 2026
- Adopted (with conditions) — Statewide Illinois building-code baseline applicable to construction in Illinois, including Clay County, subject to the distinctions and conditions in the Capital Development Board materials.
  “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.”
  Building Codes and Regulations ↗Re-checked Sep 26, 2026
- 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.”
  Building Codes and Regulations ↗Re-checked Sep 26, 2026
InspectionsLimited
New residential construction in Illinois, including qualifying construction in Clay County
- The exemption is subject to the exception in Section 15 of the Illinois Residential Building Code Act.
- New residential construction means original construction of a single-family home or a dwelling containing 2 or fewer apartments, condominiums, or townhouses.
- The changes made by Public Act 103-510 apply beginning January 1, 2025.
- This claim addresses the state certification-of-inspection requirement and does not establish whether Clay County imposes a separate local inspection requirement.
effective date: 2025-01-01
“(e) Except as provided in Section 15 [...] new residential construction is exempt from this Section. [...] (h) [...] apply beginning on January 1, 2025.”
20 ILCS 3105/10.09-1, Certification of inspection ↗Re-checked Sep 29, 2026
3 more reviewed findings on this topic
- Limited — Privately funded construction, including construction in Clay County, Illinois
  “Does the State perform plan reviews, issue building permits, perform inspections for building code compliance or issue occupancy permits for privately funded construction? No. If any of these are required, they would be addressed by the unit of local government.”
  Illinois Codes FAQ ↗Re-checked Sep 26, 2026
- 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.”
  Illinois Codes FAQ ↗Re-checked Sep 9, 2026
- Limited — Privately funded construction statewide in Illinois, as to inspections performed by the State rather than by a local authority having jurisdiction.
  “No. If any of these are required, they would be addressed by the unit of local government.”
  Illinois Codes FAQ ↗Re-checked Sep 26, 2026
Certificate of occupancyNot required
The state statutory certification-of-inspection prerequisite to occupancy under 20 ILCS 3105/10.09-1 for new residential construction in a non-building-code jurisdiction, including qualifying residential construction in Clay County.
- This is limited to the certification-of-inspection requirement in 20 ILCS 3105/10.09-1 and is not a determination that Clay County or an incorporated municipality does not require a separate certificate of occupancy.
- The exemption is subject to Section 15 of the Illinois Residential Building Code Act.
- New residential construction means original construction of a single-family home or a dwelling containing 2 or fewer apartments, condominiums, or townhouses.
- The statutory changes apply beginning January 1, 2025.
“(e) Except as provided in Section 15 of the Illinois Residential Building Code Act, new residential construction is exempt from this Section”
20 ILCS 3105/10.09-1 — Certification of inspection ↗Re-checked Sep 10, 2026
2 more reviewed findings 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.”
  Illinois Codes FAQ ↗Re-checked Sep 9, 2026
- Limited — Occupancy permits or certificates for privately funded construction in Illinois.
  “No. If any of these are required, they would be addressed by the unit of local government.”
  Illinois Codes FAQ ↗Re-checked Sep 26, 2026
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”
ilga.gov ↗Re-checked Sep 9, 2026
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”
55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures ↗Re-checked Sep 9, 2026
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”
Manufactured & Modular Homes/Mobile Structures ↗Re-checked Sep 9, 2026
One more reviewed finding on this topic
- Limited — Manufactured-home communities and manufactured-home installation in Clay County, Illinois.
  “IDPH licenses all parks with 5 or more sites (except those located in home rule units).”
  Manufactured & Modular Homes/Mobile Structures ↗Re-checked Sep 10, 2026
Septic inspectionLimited
New and replacement surface-discharging private sewage disposal systems covered by Illinois EPA general NPDES Permit ILG62.
- Coverage under the general permit is limited to eligible dischargers.
- Systems not eligible for general-permit coverage may require an individual NPDES permit.
- Periodic inspection, monitoring, and reporting are required under the permit.
“The permit sets discharge limits and requires periodic inspection, monitoring and reporting.”
Illinois Surface Discharge Permit (ILG62) ↗Re-checked Sep 9, 2026
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.”
77 Ill. Adm. Code 905.130 Human Waste Disposal ↗Re-checked Sep 9, 2026
One more reviewed finding on this topic
- Limited — Human-waste disposal and other domestic wastewater for occupied buildings in Clay County
  “Privies, portable toilets, recirculation toilets, incinerator toilets and compost toilets are approved for private sewage disposal of human wastes. Other domestic wastes shall be disposed of in a conventional system (see Section 905.30); however, the size of all components, as designed in accordance with Appendix A, Illustration A, may be reduced 25 percent (except that septic tanks may not be smaller than 750 gallons).”
  Section 905.130 Human Waste Disposal ↗Re-checked Sep 10, 2026
Mandatory utility hookupConditional
Private sewage disposal systems in Clay County where an IEPA-permitted sanitary sewer is available
- New or renovated private sewage disposal systems may not be approved when an IEPA-permitted sanitary sewer is available for connection.
- For residential property or non-residential property with sewage flow under 1,500 gallons per day, sewer availability is within 300 feet.
- For non-residential property with sewage flow of at least 1,500 gallons per day, sewer availability is within 1,000 feet.
- The availability rule does not apply when a physical barrier or local ordinance prevents connection.
- A private sewage disposal system may be installed if connection cannot be made with an individual 4-inch line.
residential or non-residential flow under 1500 gallons per day sewer distance: <= 300 feet (Unless a physical barrier or local ordinance prevents connection.) · non-residential flow at least 1500 gallons per day sewer distance: <= 1000 feet (Unless a physical barrier or local ordinance prevents connection.) · individual sewer connection line: 4 inches (If connection cannot be made with an individual line, a private sewage disposal system may be installed.)
“New or renovated private sewage disposal systems shall not be approved where a sanitary sewer operated and maintained under permit of the Illinois Environmental Protection Agency is available for connection. A sanitary sewer is available for connection when it is within 300 feet of a residential property or a non-residential property with a sewage flow less than 1500 gallons per day, or within 1000 feet of a non-residential property with a sewage flow greater than or equal to 1500 gallons per day, unless a physical barrier or local ordinance exists that prevents connection to the sewer. If connection from the property to the sanitary sewer cannot be made with an individual line (i.e., 4" inch line), then a private sewage disposal system may be installed.”
ilga.gov ↗Re-checked Sep 10, 2026
2 more reviewed findings on this topic
- Conditional — Buildings intended for human habitation or occupancy in Clay County, subject to Illinois Plumbing Code
  “Each building which is intended for human habitation or occupancy shall have a connection to a public water system, a semi-private water system, or a private water supply constructed in accordance with the requirements of the Illinois Water Well Construction Code (77 Ill. Adm. Code 920) or the Surface Source Water Treatment Code ( 77 Ill. Adm. Code 930), and a connection to a public sewer system or private sewage disposal system constructed to the requirements of the Illinois Private Sewage Disposal Code (77 Ill. Adm. Code 905).”
  Section 890.170 Sewer and/or Water Required ↗Re-checked Sep 10, 2026
- Water and sewer (with conditions) — Each building in Illinois intended for human habitation or occupancy, where the Illinois Plumbing Code applies to its plumbing-system design or installation.
  “Each building [...] shall have a connection to a public water system, [...] and a connection to a public sewer system or private sewage disposal system”
  77 Ill. Adm. Code 890.170 — Sewer and/or Water Required ↗Re-checked Nov 4, 2026
Agricultural exemptionAvailable
Agricultural experiences conducted as a secondary use with agricultural production on a farm in Illinois.
- The activity must be agriculture-related, a secondary use in conjunction with agricultural production, and occur on a farm.
- The activity must be open to the public with the intended purpose of promoting or educating the public about agriculture, agricultural practices, agricultural activities, or agricultural products.
- The property’s primary use must be agricultural production.
- The exemption prevents a county from requiring a conditional use permit, special use permit, special exception, or variance; the statute does not state that other applicable State or local requirements are waived.
“a county shall not require a conditional use permit [...] or variance for agricultural experiences on property of which the primary use is agricultural production.”
Public Act 102-0492 — Agricultural Experiences Act ↗Re-checked Nov 4, 2026
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.”
Highway Permits ↗Re-checked Sep 9, 2026
Building in a floodplainRequired
Construction in floodways and, where a floodway has not been delineated, work in floodplains in Clay County under Illinois Department of Natural Resources floodway and floodplain rules.
- The rules affect all streams and lakes except those in northeastern Illinois regulated under Part 3708.
- Floodway construction must be permitted before construction in urban areas where the stream drainage area is one square mile or more or rural areas where it is ten square miles or more.
- If a floodway has not been previously delineated, the Division generally requires permits for work anywhere in the floodplain.
- Common minor construction activities may be automatically authorized by statewide permits; no application is needed when the activity meets the statewide permit terms and conditions.
urban stream drainage area threshold: >= 1 square mile (For floodway construction under Part 3700.) · rural stream drainage area threshold: >= 10 square miles (For floodway construction under Part 3700.)
“must be permitted by the Division prior to construction.”
Permit Programs ↗Re-checked Sep 10, 2026
One more reviewed finding on this topic
- Required — Construction activities in regulated Illinois floodways and, where a floodway has not been delineated, generally work anywhere in the floodplain.
  “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.”
  Permit Program ↗Re-checked Sep 9, 2026
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.”
FY 2025-28, Hotel Operators’ Occupation Tax Updates for Hosting Platforms for Short-Term Rentals ↗Re-checked Sep 9, 2026
Permit feesVariable (with conditions)
IDNR Office of Water Resources permit application review fees for activities in Illinois public waters, floodways of Illinois streams, and covered dam activities, including such activities in Clay County.
- A permit application review fee is required when a permit is required and the activity is not already covered by Statewide Permit authorization.
- Applications and written inquiries are reviewed free of charge to determine whether authorization is required when sufficient information is provided for that determination.
- If authorization is not required or the activity is already covered by Statewide Permit authorization, no permit application review fee is required.
- The fee is non-refundable except for overpayments.
- The applicant is notified in writing of the fee determination after initial review; continued review will not proceed without payment.
- The application is deemed withdrawn if the fee is not received within 90 days after notification of the amount.
- Fees are based on estimated professional and administrative staff time, with a standard activity structure ranging from $200 to $5,000 and a $5,000 cap.
- If multiple IDNR Office of Water Resources authorizations are required, the applicable review fees are added together, subject to the $5,000 cap.
- The review fee is adjusted on July 1 each year using the CPI-U and rounded to the nearest $10.
- The cited fee notice states that the fiscal-year-2026 schedule was effective July 1, 2025 through June 30, 2026.
standard activity fee range: 200-5000 USD (The review fee is capped at $5,000.) · fee effective date: 2014-01-15 · fiscal-year-2026 permit-required determination fee: 0 USD (The determination review is free; a non-refundable review fee applies if a permit is required and not covered by Statewide Permit authorization.) · fiscal-year-2026 example general-permit construction fee: 690 USD (Construction activities must meet the terms and conditions of a general permit.)
“If a permit is required for the activity proposed and is not already permitted by Statewide Permit authorization, permit applicants must pay a non-refundable”
Illinois Permit Application Fees - Water Resources ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Published (with conditions) — Illinois EPA initial NPDES construction stormwater permit application fees for construction activities in Clay County that require permit coverage.
  “Projects with less than 5 acres, the fee is $250. Projects with 5 acres or more, the fee is $750.”
  NPDES Permit For Construction Activities ↗Re-checked Sep 26, 2026
- Variable (with conditions) — Applications and written inquiries for Illinois Department of Natural Resources public-water, dam, and floodway work requiring authorization.
  “January 15, 2014, a new Permit Application Fee went into effect. All applications and written inquiries received will be reviewed free of charge to determine whether the Public Water, dam and/or floodway work proposed requires authorization by the Department, so long as sufficient information is provided for the Department to make that determination.”
  Permit Program ↗Re-checked Sep 9, 2026
Permit processPartial
State and federal authorization process for construction projects in waterways, floodplains, and wetlands in Clay County.
- Projects often require both State and Federal authorization.
- The joint application seeks project authorizations from the U.S. Army Corps of Engineers, Illinois Department of Natural Resources, Office of Water Resources, and Illinois Environmental Protection Agency.
- The page provides application forms, instructions, and a Permit Fee Notice, but does not establish the complete county-level process.
“Construction projects in Illinois' waterways, floodplains and wetlands often require both State and Federal authorization.”
Permit Application and Instructions ↗Re-checked Sep 10, 2026
One more reviewed finding on this topic
- Published (with conditions) — Construction projects in Illinois waterways, floodplains, and wetlands seeking State and Federal authorizations through the joint permit application process.
  “Construction projects in Illinois' waterways, floodplains and wetlands often require both State and Federal authorization. This joint application is designed to simplify the approval process for the applicant seeking project authorizations from the U. S. Army Corps of Engineers, the Illinois Department of Natural Resources, the Office of Water Resources and the Illinois Environmental Protection Agency.”
  Permit Application and Instructions ↗Re-checked Sep 9, 2026
Campground & park staysLimited
Operation of a campground providing temporary parking of recreational vehicles in Illinois; this is not a determination of long-term RV occupancy on an individual private parcel outside the statutory campground definition.
- IDPH annually inspects and licenses covered campgrounds.
- A covered campground includes an area where three or more tents, cabins, recreational vehicles, or other shelters are erected and maintained for camping, or where space is provided for camping or temporary RV parking for 10 or more persons for six or more camping days in a calendar year.
- Campgrounds within home-rule units of government are exempt from this State program.
- IDPH inspects water supply and sewage disposal systems, electrical systems, sanitation, food service, and recreational facilities.
- IDPH reviews construction plans for new campgrounds and major expansions or alterations.
- Local zoning and other local requirements may separately apply.
recreational vehicles or other shelters erected and maintained for camping: >= 3 shelters (One alternative branch of the statutory campground definition.) · persons using space for camping or temporary RV parking: >= 10 persons (Applies for six or more camping days during a calendar year.) · camping days: >= 6 days per calendar year (Applies to the 10-or-more-person branch of the statutory campground definition.)
“State law requires the IDPH to annually inspect and license campgrounds in Illinois. The Campground Licensing and Recreational Area Act defines campground as a recreational area where three or more tents, cabins, recreational vehicles or other permanent or non-permanent type shelters are erected and maintained for camping or where space is provided for camping, temporary parking of recreational vehicles or placing of such tents, cabins, recreational vehicles or other permanent or non-permanent type shelters of any kind for 10 or more persons for six or more camping days during a calendar year.”
Youth Camps and Campgrounds ↗Re-checked Nov 4, 2026
3 more reviewed findings on this topic
- Limited — Temporary camping and temporary recreational-vehicle parking in campgrounds located in Clay County, Illinois.
  “for 10 or more persons for six or more camping days during a calendar year.”
  Youth Camps and Campgrounds ↗Re-checked Sep 10, 2026
- Allowed (with conditions) — Overnight camping in Illinois campgrounds subject to the Campground Licensing and Recreational Area Act.
  ““Camping Day” means any 24 hour period or portion thereof during which the participants remain overnight at the site.”
  Youth Camps and Campgrounds ↗Re-checked Sep 9, 2026
- Limited — Temporary camping in covered Illinois campgrounds; this claim does not establish whether camping is allowed on a private parcel outside the statutory campground definition.
  “Campgrounds within home rule units of government are exempt. Staff inspects the water supply and sewage disposal systems, the electrical systems, general sanitation, food service and recreational facilities. IDPH also reviews construction plans for all new campgrounds and for major expansions or alterations of existing ones.”
  Youth Camps and Campgrounds ↗Re-checked Nov 4, 2026
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”
55 ILCS 5/5-1064 — Buildings in certain counties of less than 1,000,000 population ↗Re-checked Oct 1, 2026
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).”
  Illinois Codes FAQ ↗Re-checked Sep 26, 2026

Inside cities and towns in Clay County

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

Building code adoptedAdopted (with conditions)
Construction and alterations within the City of Flora, Illinois.
- The City Building Inspector enforces the adopted codes through plan review and inspections.
- Residential, commercial, and industrial construction permits are issued after building-plan examination and approval.
- The City states that a building permit may be needed for building, remodeling, or other construction projects and directs applicants to contact the Building/Zoning Department.
- The adopted International Residential Code of 2024 includes Amendment R309.2 requiring automatic sprinkler systems for one- and two-family dwellings.
- The page lists the 2024 International Building Code, 2024 International Residential Code, 2024 International Existing Building Code, 2024 International Mechanical Code, 2024 International Property Maintenance Code, 2024 International Fire Code, 2024 Illinois Energy Conservation Code, 2012 NFPA Life Safety Code, current NFPA 13 and NFPA 72 codes, 2024 International Swimming Pool and Spa Code, State of Illinois Accessibility Code, 2024 International Fuel Gas Code, current Illinois Plumbing Code, and 2023 National Electrical Code.
International Building Code edition: 2024 · International Residential Code edition: 2024 (Amendment R309.2 requires automatic sprinkler systems for one- and two-family dwellings) · International Existing Building Code edition: 2024 · International Mechanical Code edition: 2024 · International Property Maintenance Code edition: 2024 · International Fire Code edition: 2024 · Illinois Energy Conservation Code edition: 2024 · NFPA Life Safety Code edition: 2012 · National Electrical Code edition: 2023
“The City has adopted the following editions of the International Codes: The International Building Code of 2024”
Building & Zoning - Flora, Illinois ↗Re-checked Sep 29, 2026
One more reviewed finding on this topic
- Adopted (with conditions) — Construction and alterations within the City of Flora, including residential, commercial, and industrial construction subject to Flora's Building & Zoning Department.
  “The City has adopted the following editions of the International Codes: The International Building Code of 2024”
  Building & Zoning - Flora, Illinois ↗Re-checked Sep 10, 2026
Local zoningPresent (with conditions)
Buildings constructed within the corporate limits of the Village of Louisville, Clay County, Illinois.
- The rule does not apply to buildings constructed upon the Public Square.
- The Mayor and Board of Trustees may grant a variance for irregular, narrow, shallow, or steep lots or other physical conditions causing unnecessary hardship.
- The variance must be consistent with the Article's general purpose and intent and not injurious to the neighborhood or otherwise detrimental to the public welfare.
- The ordinance is identified as Ordinance No. 455, dated 12-12-96.
front setback: >= 20 feet (Does not apply to buildings on the Public Square.) · side setback: >= 10 feet (Does not apply to buildings on the Public Square.) · rear setback: >= 10 feet (Does not apply to buildings on the Public Square.)
“twenty (20) feet to the front lot line, [...] ten (10) feet to the side lot line [...] ten (10) feet to the rear lot line”
Municipal Code – Village of Louisville ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Present (with conditions) — Commercial, industrial, and residential development changes within the City of Flora and along its borders.
  “The City of Flora has a zoning ordinance to control commercial, industrial and residential development changes within the city and along its borders.”
  Zoning Board - Flora, Illinois ↗Re-checked Oct 9, 2026

Still unanswered

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

Zoning districts — Countywide zoning-district publication for Clay County, Illinois.
Minimum dwelling size — Minimum floor-area or dwelling-size requirements for residences in Clay County.
Minimum lot size — Minimum lot-area requirements for residential or other development in Clay County.
Living in an RV — RV occupancy, including long-term or residential occupancy and temporary camping, on private land in Clay County, including unincorporated areas.
Tiny homes — Tiny-home occupancy in unincorporated Clay County.

1 more unanswered

Accessory dwellings

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 Clay County, Illinois

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

Clay County scores 77/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and strong self-sufficiency basics: 45.9″/yr rainfall with little drought.

How much does land cost in Clay County, Illinois?

Land in Clay County runs about $6,235 per acre, based on the latest county data.

What is the water situation in Clay County?

Clay County gets about 45.9" of rain a year, with severe drought in roughly 2% of years.

How remote is Clay County?

A representative private-land location has about 8,008 people within a 30-minute drive and 1,793,549 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.

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