Bolthole Index

Franklin County, Illinois

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

67Index Score / 100
#31 of 102 in Illinois

Franklin County, Illinois requires a building permit before construction of a permanent structure or an addition begins, and each structure needs a separate permit.1 Portable structures smaller than 12 by 14 are exempt, while agricultural uses are exempt from the $50 filing fee but not expressly from the permit itself.1 Septic permits and private-well permits go through the Franklin-Williamson Bicounty Health Department.23

At a glance

Building permit
Required for permanent structures and additions before work begins1
Small portable structures
No county permit when portable and smaller than 12 by 141
Building-permit fee
$50; no fee for agricultural uses of land or buildings4
Zoning
Countywide zoning status is unconfirmed; ask the county before choosing a use or site plan5
Septic
Permit required through the Franklin-Williamson Bicounty Health Department for new systems and major renovations2
RV and tiny-home living
Not confirmed for an individual private parcel; ask the county and Environmental Health56
Owner-builder
No exemption was confirmed; ask the Supervisor of Assessments before applying78
Private well
Permit required before construction; new wells are inspected3

Who to call

Building permits

Franklin County Supervisor of Assessments

County building-permit applications and property-assessment questions

(618) 435-9800

Franklin County Campbell Building 901 Public Square Benton, IL 62812

Septic permits

Franklin-Williamson Bicounty Health Department - Environmental Health

Private sewage disposal reviews, permits and inspections, plus private water-supply permits and inspections

(618) 439-0951

[email protected]

403 East Park Benton, IL 62812

Floodplain permits

Franklin County Highway Department and Floodplain Administrator

Floodplain review of building permits in unincorporated areas, county-highway entrances and county-road jurisdiction questions

618-439-0331

13034 Oddfellow Lane, Benton, IL 62812

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

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

Yes. Franklin County requires a building permit before construction of a permanent structure or an addition to an existing structure begins, and each structure needs its own permit.1 Mobile homes, manufactured homes, and permanently affixed decks or porches are among the covered projects.1 A portable building, portable carport, or other portable structure smaller than 12 by 14 does not require the county permit.1 The application fee is $50, although the county does not collect that fee for agricultural uses of land or buildings; the agricultural exception concerns the fee, not the underlying permit requirement.4 Franklin County says a completed application is to be issued within 30 days after the Supervisor of Assessments receives all facts and pertinent data.1

Who handles Franklin County building permits, and how do you reach the office?

Franklin County uses the Supervisor of Assessments rather than a separately named building department for building-permit applications.1 The office is in the Franklin County Campbell Building, 901 Public Square, Benton, Illinois, and its phone number is (618) 435-9800.8 The permit is required before work begins, and every structure requires a separate filing.1 The County Engineer approves all permits and, for unincorporated parcels, checks them for compliance with FEMA floodplain regulations.9 Call the Supervisor of Assessments first for the application and submission requirements, then ask whether the proposed project needs additional review for inspections, an occupancy certificate, or a locally adopted code edition because those county details could not be confirmed.8

Does Franklin County, Illinois have zoning?

Franklin County's countywide zoning status is unconfirmed; no official county zoning ordinance or clear statement that the county has no zoning was confirmed.5 Do not treat that gap as permission for a particular use, setback, building height, minimum home size, or lot layout.5 Illinois counties can establish setback lines and regulate building height through local zoning districts, so any actual dimensional limit would come from the applicable local rules.1011 A parcel inside a city, town, or village may also be governed by that municipality, and the county permit material says some property in municipalities without zoning or city ordinances may still require a county permit.1 Ask the Supervisor of Assessments which land-use authority applies to the parcel before fixing a site plan.8

How do septic permits work in Franklin County?

The Franklin-Williamson Bicounty Health Department handles Franklin County private sewage disposal permits and inspections.12 A new system or major renovation needs a department permit before construction, and new, altered, or repaired systems are reviewed and approved before work starts.2 The department inspects systems to confirm that construction follows the application plans and code requirements.13 Contact Environmental Health at the Benton office, 403 East Park, Benton, Illinois, by calling (618) 439-0951 or emailing [email protected].6 Septic feasibility is a major purchase issue because only about 3.1% of Franklin County soils are rated without severe limitations for a conventional drain field.14 Illinois requires plan approval from the state or local authority before a new private sewage system is built.15

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

Franklin County has not confirmed a rule allowing or prohibiting long-term RV occupancy, temporary camping, or tiny-home occupancy on an individual private parcel.5 The county's permit rule still applies to permanent structures, additions, mobile homes, and manufactured homes, while only portable structures smaller than 12 by 14 receive the stated size exception.1 Illinois campground licensing addresses regulated campgrounds and temporary RV parking there, not the separate question of living in an RV on your own land.16 Before buying or moving a unit onto land, ask the Supervisor of Assessments whether the proposed structure and use need county approval, and ask Environmental Health how wastewater will be approved.86 A manufactured home also remains subject to Illinois installation requirements and any applicable local zoning, floodplain, and utility rules.17

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

  1. Confirm whether the parcel is unincorporated or inside a municipality, and ask the Supervisor of Assessments which land-use rules apply because countywide zoning is unconfirmed.58
  2. Submit a separate Franklin County building-permit application for each permanent structure before construction begins and pay the $50 fee unless the agricultural-use fee exception applies.14
  3. Have the County Engineer complete the required permit approval and floodplain review for an unincorporated site.9
  4. Obtain the Bicounty Health Department's septic approval before construction and arrange the required inspections.213
  5. Obtain a private-well permit before construction if the property will use a new well.3
  6. Ask the Supervisor of Assessments whether inspections or an occupancy certificate apply because Franklin County's published materials do not confirm those steps.8
  7. Obtain an IDOT permit before doing any work within a state-maintained road right-of-way.18

What should you check before buying land in Franklin County?

Start with septic feasibility because only about 3.1% of Franklin County soils are rated without severe limitations for a conventional drain field, and Bicounty Health must approve the system before construction.142 Check the proposed house site for floodplain constraints; the County Engineer reviews unincorporated building permits for FEMA floodplain compliance and can provide base flood elevations.9 Identify the road authority before planning an entrance because Franklin County says several government units control roads, while IDOT requires a permit for work in a state-maintained right-of-way.918 If the tract will be divided, Franklin County requires land transfers to follow its Subdivision Ordinance and the Illinois Plat Act.19 Reported farmland value is about $5,677 per acre, while the median property-tax bill is about $1,316 a year at an effective rate near 1.5%.202122

Watch-outs

  • The agricultural provision waives Franklin County's $50 building-permit fee, but it does not say agricultural construction is exempt from obtaining the permit.4
  • Do not assume that an unconfirmed zoning status means unrestricted land; ask the Supervisor of Assessments which local land-use rules govern the parcel.58
  • Only about 3.1% of Franklin County soils are rated without severe limitations for a conventional septic drain field, so get a site evaluation before fixing the house location.142
  • The County Engineer reviews building permits in unincorporated areas for FEMA floodplain compliance, so floodplain review belongs early in the site-planning process.9

Sources

  1. § 150.01 Building Permits, quoted and re-checked
  2. Environmental Health, quoted and re-checked
  3. Environmental Health — Private Water Supply Program, quoted and re-checked
  4. § 150.01 Building Permits, quoted and re-checked
  5. (2026 county census)
  6. Franklin-Williamson Bicounty Health Department - Environmental Health (bicountyhealth.org)
  7. (2026 county census)
  8. Franklin County Supervisor of Assessments (franklincountyil.gov)
  9. Franklin County Highway Department and Floodplain Administrator (franklincountyil.gov)
  10. 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
  11. 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
  12. Franklin-Williamson Bicounty Health Department - Environmental Health (2026 county census)
  13. Environmental Health, quoted and re-checked
  14. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  15. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  16. Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
  17. Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
  18. Highway Permits (Illinois statewide rule), quoted and re-checked
  19. § 151.02 Scope and Purpose, quoted and re-checked
  20. Farmland value per acre (USDA census): Bolthole Index county data
  21. Median property tax bill: Bolthole Index county data
  22. Effective property tax rate: Bolthole Index county data

Written September 27, 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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County locator

Franklin County in Illinois

67
County map
Franklin County highlighted among the Illinois counties · colored by Index score

How Franklin County scores

Seclusion46100% ev.
Self-Sufficiency68100% ev.
Admin Boringness7468% ev.
Durability54100% ev.
Property Autonomy42100% ev.
Carry Cost65100% ev.

Evidence strength: 95%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$109kTypical home
1.5%Property tax
$5,677Land / acre
47"Annual rain
2.8% of yrsSevere drought
11.9 / yr (+10.7)Mid-century 100°F days
16 daysMid-century dry spell
2.23" (+7.6%)Mid-century 1-day rain
1.86×Wildfire change factor
100%Forward climate coverage
$1,666Home insurance / yr
3.2% / yrInsurance growth
1.32%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
44,174People within 30 min
2,412,558People within 2 hr
48,161Radius comparison (15 mi)
90.8People / sq mi
5.4%Federal land
98.5%Land at 15% slope or less
3.1%Septic soil without severe limits
7,731 acWorkable land screen
30%Wooded land
45.8 tonsBiomass / forest ac
56.1°FAvg temp

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Answers from the rulebook for Franklin County

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

Franklin County rules

  • Building permitRequired

    Construction of new structures and alteration of existing structures on real property in Franklin County.

    • A permit is required before construction or alteration begins.
    • The permit must be issued within 30 days after all facts and pertinent data are properly presented to the County Supervisor of Assessments.
    • Each structure requires a separate permit.
    • Portable buildings, portable carports, or other portable structures smaller than 12 x 14 do not require a permit.
    • The county building-permit information page also states that certain property within city, town, or village limits may require a county permit when that locality has no zoning or city ordinances.

    application fee: 50 USD (No fee is collected for agricultural uses of land or buildings.)

    “Building Permits are required for: [...] Any permanent structure erected on the property [...] Any additions to an existing structure [...] Cook Portable buildings, Portable Carports or any structure that is portable and smaller than 12 x 14 do not require a permit”
  • Who permits septicMixed (with conditions)

    Private sewage disposal regulation in Franklin and Williamson Counties.

    • The Bi-County Health Department operates under local health ordinances incorporating the Illinois Department of Public Health Private Sewage Code.
    • The department reviews and approves systems before construction and has enforcement authority.
    “This program is conducted in compliance with local health ordinances that incorporates the Illinois Department of Public Health Private Sewage Code and includes enforcement authority.”
  • Septic permitRequired

    New and major-renovation private sewage systems in Franklin County.

    • New, altered, and repaired private sewage systems are reviewed and approved before construction.
    • The source specifically states permits are issued on new and major renovation systems.
    • A separate FY2025 health-department report states all private sewage systems serving fifteen people or less must have a permit before construction begins.
    “All private sewage systems installed serving fifteen people or less must have a permit through this department before construction begins.”
  • Septic inspectionRequired

    Private sewage disposal systems in Franklin County.

    • Inspections confirm compliance with application plans and code requirements.
    • The source also reports annual evaluations of septage hauling equipment, storage facilities, and land-disposal sites.
    “Inspections are made to confirm compliance with application plans & code requirements.”
  • Well permitRequired

    Construction of new private wells serving Franklin County properties.

    • The health department acts under a written agreement with the Illinois Department of Public Health.
    • The permit is issued after determining compliance with the Illinois Water Well Construction Code.
    • All new wells are inspected.
    “A permit is issued prior to construction on any new well after determining if it is in compliance with the Illinois Water Well Construction Code & all new wells are inspected.”
  • Agricultural exemptionConditional

    Agricultural uses of land or buildings subject to the county building-permit fee.

    • The ordinance exempts agricultural uses from the $50 building-permit filing fee.
    • The source does not state that agricultural construction is exempt from obtaining a building permit.

    building-permit filing fee: 50 USD (No fee collected for agricultural uses of land or buildings.)

    “Any application for a building permit shall be accompanied by a fee of $50. The fee for the same shall be paid to the Office of the Supervisor of Assessments, except fees shall not be collected for agricultural uses of land or buildings.”
  • Subdividing landRegulated (with conditions)

    Subdivision and platting of land within the county's jurisdiction.

    • Unless otherwise excepted, the County Board approves subdivisions.
    • Municipal approval and county approval are both required when the subdivision falls within a municipality or within one and one-half miles of municipal corporate limits that has adopted the chapter and filed a comprehensive plan.
    • Exceptions include certain divisions of two acres or more with at least 125 feet of road frontage, certain public-purpose conveyances, adjoining-owner exchanges, certain historic parcel divisions, and other situations where the State Plat Act does not require filing.
    “All land transfers must adhere to Franklin County‘s Subdivision Ordinance and the Illinois Plat Act. All property transfers outside of city and subdivision lots must be approved by the Supervisor of Assessments to assure compliance.”

Illinois rules that apply here

  • 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©.”
    One more reviewed finding on this topic
    • 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.”
  • Permit feesVariable (with conditions)

    Applications and written inquiries for Illinois Department of Natural Resources public-water, dam, and floodway work requiring authorization.

    • The Department reviews applications and written inquiries free of charge to determine whether authorization is required when sufficient information is provided.
    • A permit application fee may apply under the Department's permit fee schedule.
    “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 processPublished (with conditions)

    Construction projects in Illinois waterways, floodplains, and wetlands seeking State and Federal authorizations through the joint permit application process.

    • The joint application seeks authorizations from the U.S. Army Corps of Engineers, Illinois Department of Natural Resources, Office of Water Resources, and Illinois Environmental Protection Agency.
    • The joint application form replaced the former Protecting Illinois Waters application package.
    “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.”
  • 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 authorityGeneral

    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 a building code.
    • A county that does not adopt a building code is treated as a non-building-code jurisdiction, and section 10.09-1 of the Capital Development Board Act applies.
    • A county that adopts a building code must comply with section 10.18 of the Capital Development Board Act.
    • Locally adopted codes must regulate residential structural design at least as stringently as the baseline International Residential Code.
    • For privately funded projects, the local code official is the authority having jurisdiction; the State does not issue private-project building permits, perform plan reviews, or perform inspections.
    “A municipality or county is not required to adopt building codes. If they do NOT adopt a building code then they are considered a non-building code jurisdiction and section 10.09-1 of the Capital Development Board Act (20 ILCS 3105) applies. If they do adopt a building code(s) then it must comply with section 10.18 of the Capital Development Board Act (20 ILCS 3105).”

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemptions from county building-permit requirements.
  • County-wide zoning — Countywide zoning in Franklin County, including unincorporated areas.
  • Local zoning — Aggregate of municipal and other local zoning within Franklin County.
  • Zoning districts — Published zoning districts for Franklin County.
  • Minimum dwelling size — Minimum dwelling size in unincorporated Franklin County.
7 more unanswered
  • Minimum lot size
  • Lot coverage
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Mandatory utility hookup

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 Franklin County, Illinois

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

Franklin County scores 67/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and strong self-sufficiency basics: 47″/yr rainfall with little drought.

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

Franklin County generally requires a residential building permit. Onsite septic is permitted by Franklin-Williamson Bicounty Health Department. 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 Franklin County, Illinois?

Land in Franklin County runs about $5,677 per acre, based on the latest county data.

What is the water situation in Franklin County?

Franklin County gets about 47" of rain a year, with severe drought in roughly 2.8% of years.

How remote is Franklin County?

A representative private-land location has about 44,174 people within a 30-minute drive and 2,412,558 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.

Off-grid gear

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

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How Franklin compares in Illinois

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