Bolthole Index

Cass County, Illinois

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

64Index Score / 100
#45 of 102 in Illinois

Unincorporated Cass County, Illinois requires building permits for covered residential and commercial projects, with limited exceptions for minor work, utility connections and agricultural uses1. County zoning applies in unincorporated areas and villages without their own zoning ordinance2. Private sewage construction, alteration or extension requires a Cass County Health Department permit and inspection345.

At a glance

Building permit
Required for covered projects in the county zoning jurisdiction1
Zoning
County rules cover unincorporated areas and villages without their own ordinance2
Septic
Health Department permit and final written approval required45
RV living
Temporary permit required; occupancy capped at 182 days per calendar year6
Minimum home size
Varies by district; 720 to 1,300 square feet in listed residential districts7
Agricultural residence
At least 800 square feet on a lot of at least 3 acres89
Owner-builder
No general building-permit exemption confirmed; qualifying homeowners may do plumbing work under state conditions1011
Private well
Permit required before construction, modification or sealing12

Who to call

Zoning

Cass County Zoning Officer

Building permits, county zoning, variances, conditional uses, special-use permits and rezoning requests

(217) 370-0111

davecchd@gmail.com

Online permits →

Health department

Cass County Health Department

Local contact to confirm Cass County private sewage and water-well administration

(217) 452-3057

331 South Main, Virginia, IL 62691

Roads & driveways

Cass County Highway Department

Construction and maintenance of bridges and roads in the Cass County Highway System

217-452-7525

highway@co.cass.il.us

5432 County Shed Rd., P.O. Box 22, Virginia, IL 62691

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

Off-grid gear

Going off-grid in Cass 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 Cass County, Illinois?

Unincorporated Cass County requires a permit for buildings, structures, uses and structural alterations covered by its zoning ordinance, and starting a covered project without one may result in a fine1. Exceptions include routine maintenance or repair, alterations valued below $300, service connections to municipally owned utilities and most agricultural uses1. Agricultural buildings still face building and setback lines, and residences on agricultural land still face minimum-lot rules13.

Inside Virginia, the city issues building permits; private sewage permits remain with the Cass County Health Department1415. Apply to the Cass County Zoning Enforcement Officer on county forms submitted in triplicate before beginning work1. A permit expires if the authorized work or change of use is not substantially started within 90 days1. Illinois has statewide baseline building-code requirements, but Cass County's adoption of a separate general building code, its general inspection schedule and any occupancy-certificate requirement could not be confirmed; ask the Zoning Officer what plans, construction standard, inspections and final approval apply1617.

Who issues building permits in Cass County and how do you reach the office?

Cass County routes building-permit and land-use work through the Cass County Zoning Officer rather than a separately named building department17. The office issues building permits and processes variances, conditional uses, special-use permits and rezoning requests17. Call (217) 370-0111 or email davecchd@gmail.com to request the application and assistance before a residential or commercial project in county zoning jurisdiction1817.

Ask the Zoning Officer to identify the parcel’s district, allowed use, setbacks, required drawings, current fee, inspections and final approval18. Cass County sets fees for zoning petitions, use permits, certificates of compliance, variations and appeals by County Board action, but a general residential building-permit fee schedule could not be confirmed19. For access involving a county-system road, contact the Cass County Highway Department, which maintains roads and bridges in that system20.

Does Cass County have zoning?

Cass County zoning applies to unincorporated land and villages without their own zoning ordinance2. Inside Virginia, city zoning applies; private sewage permits still come from the Cass County Health Department2115. The county ordinance establishes zoning districts, with its certified map available at the County Clerk’s office2223.

In county districts R-1, R-2 and R-3, minimum dwelling areas are respectively 1,300, 1,000 and 720 square feet, minimum lots are 10,000, 7,500 and 6,000 square feet, and maximum building height is 35 feet72425. R-1 front and rear setbacks are 25 and 30 feet26. Agricultural District residences require at least 800 square feet of living area and a lot of at least 3 acres89. Agricultural front setbacks are 50 feet from federal or state highway rights-of-way and 35 feet from county or township road rights-of-way; residences or detached structures need 35-foot side and rear setbacks2728.

How do septic permits work in Cass County?

Off-grid private sewage systems are allowed in Cass County subject to Health Department approval and county and state standards; available public sewerage may prevent approval29. The Cass County Health Department issues permits for constructing, altering or extending individual sewage systems in Cass County34. An application must include enough data and a complete plan for the proposed facility, and a construction permit becomes void if work has not started within 6 months4. The Board of Health may refuse a private-system permit when public or community sewerage is available30.

A homeowner may install a system serving the homeowner's personal residence, but the system cannot be covered or used until the Health Department inspects it and issues written approval5. Call the Cass County Health Department at (217) 452-3057 before site design to confirm the application, soil work, fee and inspection timing31. Only 28.1% of county soils are rated without severe limitations for a conventional drain field, so evaluate wastewater feasibility before committing to a house location32. Alternative toilets do not remove the requirement to dispose of other domestic wastewater through a conventional private sewage system33.

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

On unincorporated Cass County land, temporary use of a qualifying wheeled sleeping or camping vehicle on a lot of record requires a temporary permit from the Zoning Enforcement Officer, with occupancy capped at 182 days per calendar year634. The vehicle must remain removable, currently licensed and screened or fenced, cannot be permanently connected to septic or water, must sit at least 100 feet from property lines and requires a lot of at least 3 acres6. The lot owner, vehicle owner and occupant must be the same, and the permit must be renewed annually6.

We could not confirm a separate tiny-home occupancy rule for unincorporated Cass County; ask the Zoning Officer how the district’s dwelling-area, lot and setback standards apply7242617. Manufactured homes are expressly permitted in the R-3 district only when the mobile-home-park regulations are satisfied, with other placement and permit requirements potentially applying35. Ask the Zoning Officer to classify the proposed unit and confirm its permitted district before purchase17.

What are the steps to building a home in Cass County?

  1. Confirm whether Cass County zoning or a municipality's ordinance governs the parcel2.
  2. Ask the Zoning Officer for the district, allowed residential use, minimum home and lot size, setbacks, application and current fee1872426.
  3. Apply to the Health Department for the private-sewage permit and arrange inspection before covering or using the system45.
  4. Obtain a permit before constructing, modifying or sealing a private well12.
  5. Obtain the Cass County building permit before covered construction begins36.
  6. For work in a state-road right-of-way, obtain the required IDOT permit; ask the Highway Department about county-system road access3720.
  7. Check floodplain status and secure any county or state approval that applies before development3839.

What should you check before buying land in Cass County?

County zoning applies in unincorporated areas and villages without their own ordinance, while municipal rules may apply elsewhere40. Agricultural residences generally need at least 3 acres, 800 square feet of living area and 20 feet of public-road frontage, plus district setbacks13. Planned-development projects must follow the separate Subdivision Regulations Ordinance’s approval procedure, even under single ownership41.

Cass County requires a private-sewage permit and inspection, and conventional drain fields face severe soil limitations across much of the county4532. New private wells require a permit42. Floodplain development is regulated, and access work on a state-maintained road requires an IDOT permit3837. Cass County's effective property-tax rate is about 2.1%, with a median annual property-tax bill of about $2,0074344.

Watch-outs

  • Cass County zoning does not govern an incorporated municipality that administers its own ordinance; identify the parcel's jurisdiction before relying on county rules2.
  • Agricultural use can avoid the general permit requirement, but agricultural structures still face building or setback lines and residences on agricultural land still face dimensional rules45.
  • A private sewage permit may be refused where a public or community sewer is available, so resolve sewer availability before paying for a private-system design30.

Sources

  1. Zoning - Cass County Illinois, quoted and re-checked
  2. Zoning - Cass County Illinois, quoted and re-checked
  3. Cass County Private Sewage Disposal Ordinance, quoted and re-checked
  4. Cass County Private Sewage Disposal Ordinance, quoted and re-checked
  5. Cass County Private Sewage Disposal Ordinance, quoted and re-checked
  6. Cass County Zoning Ordinance, quoted and re-checked
  7. Cass County Zoning Ordinance, quoted and re-checked
  8. Cass County Zoning Ordinance, quoted and re-checked
  9. Cass County Zoning Ordinance, quoted and re-checked
  10. HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
  11. 225 ILCS 320/18 — Local regulation; Department standards (Illinois statewide rule), quoted and re-checked
  12. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  13. Zoning Ordinances 2023, quoted and re-checked
  14. Virginia: 4-1-2: Building Permits (Cass County), quoted and re-checked
  15. Virginia: official source (Cass County), quoted and re-checked
  16. Building Codes and Regulations (Illinois statewide rule), quoted and re-checked
  17. Cass County Zoning Officer (co.cass.il.us)
  18. Zoning - Cass County Illinois, quoted and re-checked
  19. Cass County Zoning Ordinance, quoted and re-checked
  20. Cass County Highway Department (co.cass.il.us)
  21. Virginia: Chapter 6: Residential Districts (Cass County), quoted and re-checked
  22. Zoning - Cass County Illinois, quoted and re-checked
  23. Cass County Zoning Ordinance, quoted and re-checked
  24. Cass County Zoning Ordinance, quoted and re-checked
  25. Zoning Ordinances 2023, quoted and re-checked
  26. Cass County Zoning Ordinance, quoted and re-checked
  27. Cass County Zoning Ordinance — dimensional standards, quoted and re-checked
  28. Cass County Zoning Ordinance, quoted and re-checked
  29. Cass County Private Sewage Disposal Ordinance, quoted and re-checked
  30. Cass County Private Sewage Disposal Ordinance, quoted and re-checked
  31. Cass County Health Department (co.cass.il.us)
  32. 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
  33. 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
  34. Cass County Zoning Ordinance, quoted and re-checked
  35. Cass County Zoning Ordinance, quoted and re-checked
  36. Zoning - Cass County Illinois, quoted and re-checked
  37. Highway Permits (Illinois statewide rule), quoted and re-checked
  38. Zoning - Cass County Illinois, quoted and re-checked
  39. Permit Program (Illinois statewide rule), quoted and re-checked
  40. Zoning - Cass County Illinois, quoted and re-checked
  41. Cass County Zoning Ordinance, quoted and re-checked
  42. Division of Environmental Health's Environmental Engineering Section, quoted and re-checked
  43. Effective property tax rate: Bolthole Index county data
  44. Median property tax bill: Bolthole Index county data
  45. Cass County Zoning Ordinance, quoted and re-checked

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

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Compared with neighboring counties

Unlike 5 of its 6 neighbors, Cass County requires a building permit for a home.

RuleCass CountyMorgan CountySchuyler CountyMenard CountyBrown CountyScott CountyMason County
Building permitRequiredNot requiredNot requiredRequiredNot requiredNot requiredLimited
County zoningYesYesNoYesNoNoYes
Septic permitsCounty Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.

County locator

Cass County in Illinois

64
County map
Cass County highlighted among the Illinois counties · colored by Index score

How Cass County scores

Seclusion59100% ev.
Self-Sufficiency63100% ev.
Admin Boringness4390% ev.
Durability57100% ev.
Property Autonomy42100% ev.
Carry Cost61100% 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 →

$99kTypical home
2.1%Property tax
$7,711Land / acre
38.4"Annual rain
2.9% of yrsSevere drought
9.2 / yr (+8.3)Mid-century 100°F days
15.3 daysMid-century dry spell
1.9" (+9.5%)Mid-century 1-day rain
1.81×Wildfire change factor
100%Forward climate coverage
$1,500Home insurance / yr
2.8% / yrInsurance growth
1.03%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
11,381People within 30 min
1,428,833People within 2 hr
18,703Radius comparison (15 mi)
33.5People / sq mi
0.6%Federal land
87.5%Land at 15% slope or less
28.1%Soils rated "not limited" for septic (strict USDA rating)
65,782 acWorkable land screen
21.2%Wooded land
43.8 tonsBiomass / forest ac
53°FAvg temp

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Cities and towns in Cass 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: Arenzville Township · Village of Arenzville · Ashland Township · Beardstown · Beardstown Township · Bluff Springs Township · Chandlerville Township · Village of Chandlerville · Hagener Township · Newmansville Township · Panther Creek Township · Philadelphia Township · Sangamon Valley Township · Virginia Township

Answers from the rulebook for Cass County

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

Cass County rules

  • Building permitRequired

    Buildings, structures, uses, and structural alterations subject to the Cass County Zoning Ordinance in unincorporated Cass County, including villages without their own zoning ordinance.

    • A permit application is made to the County Zoning Enforcement Officer on forms furnished by that officer and in triplicate.
    • No permit is required for routine maintenance or repair; alterations of an existing building with replacement value less than $300; construction of a service connection to a municipally owned and operated utility; or any agricultural use, except as required in Section 2.2.
    • The agricultural-use exception remains subject to Section 2.2 building or setback lines for agricultural buildings or structures and minimum lot size for residences on agricultural land.
    • A permit authorized work or change in use not substantially started within 90 days requires a new permit.
    • Failure to obtain a building permit before starting a project may result in a fine.
    • Incorporated municipalities may have separate rules.
    “The jurisdiction of this ordinance shall include all lands and waters within the unincorporated areas of Cass County. All buildings erected hereafter; all uses of land or buildings established hereafter; all structural alterations or relocation of existing buildings occurring hereafter; and all enlargements of or additions to existing uses occurring hereafter shall be subject to all regulations of this ordinance which are applicable to the zoning districts in which such buildings, uses, or land shall be located.”
    One more reviewed finding on this topic
    • Required — Commercial and residential projects in unincorporated Cass County subject to county zoning.
      “Failure to obtain a building permit before starting a project may result in a fine.”
  • County-wide zoningPresent (with conditions)

    Unincorporated areas of Cass County and villages without their own zoning ordinance.

    • The county zoning ordinance does not apply inside municipalities with their own zoning ordinance.
    “This applies to the unincorporated areas of the county as well as villages that do not have a zoning ordinance.”
    One more reviewed finding on this topic
    • Present (with conditions) — Cass County Zoning Ordinance in unincorporated areas and villages that do not have their own zoning ordinance.
      “The Cass County Zoning Officer administers the Cass County Zoning Ordinance. This applies to the unincorporated areas of the county as well as villages that do not have a zoning ordinance.”
  • Local zoningVaries (with conditions)

    County aggregate of zoning coverage: county zoning applies in unincorporated areas and villages without their own ordinance; incorporated municipalities may administer their own zoning.

    • This is an aggregate conclusion and does not mean the county administers every local ordinance.
    “This applies to the unincorporated areas of the county as well as villages that do not have a zoning ordinance.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate local zoning across Cass County, including county zoning for unincorporated areas and villages without their own zoning ordinance, with municipal zoning potentially applying elsewhere.
      “This applies to the unincorporated areas of the county as well as villages that do not have a zoning ordinance.”
  • Zoning districtsPublished

    Zoning districts established by the Cass County Zoning Ordinance for unincorporated Cass County.

    • The certified zoning map is on file and may be viewed in the County Clerk's office.
    • The ordinance refers to a zoning map dated February 1973.
    “For the purpose of this ordinance, the County of Cass is hereby divided into the following zoning districts:”
    One more reviewed finding on this topic
    • Published (with conditions) — County zoning districts in the Cass County Zoning Ordinance.
      “For the purpose of this ordinance, the County of Cass is hereby divided into the following zoning districts:”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Residential and agricultural zoning districts in unincorporated Cass County.

    • R-1 requires 1,300 square feet; R-2 requires 1,000 square feet; R-3 requires 720 square feet; agricultural districts require at least 800 square feet of living area.
    • Other districts may have different or no residential minimums.

    R-1 minimum total floor area: >= 1300 sq ft · R-2 minimum total floor area: >= 1000 sq ft · R-3 minimum total floor area: >= 720 sq ft · agricultural district minimum living area: >= 800 sq ft

    “The minimum living area of any residence constructed in an agricultural district must be at least eight hundred (800) square feet.”
    One more reviewed finding on this topic
    • Specified — Single-family residences constructed in the Cass County Agricultural District.
      “The minimum living area of any residence constructed in an agricultural district must be at least eight hundred (800) square feet.”
  • Minimum lot sizeDistrict specific (with conditions)

    Lots in unincorporated Cass County zoning districts.

    • R-1 minimum area is 10,000 square feet; R-2 is 7,500 square feet; R-3 is 6,000 square feet; agricultural residences generally require three acres.
    • District-specific and use-specific rules apply.

    R-1 minimum area: >= 10000 sq ft · R-2 minimum area: >= 7500 sq ft · R-3 minimum area: >= 6000 sq ft · agricultural residence minimum lot size: >= 3 acres

    “The minimum lot size permitted for the construction of a single-family residence or detached structure in an agricultural district is a minimum of three (3) acres.”
    One more reviewed finding on this topic
    • Specified — Single-family residences or detached structures in the Cass County Agricultural District.
      “The minimum lot size permitted for the construction of a single-family residence or detached structure in an agricultural district is a minimum of three (3) acres.”
  • SetbacksDistrict specific (with conditions)

    Structures in unincorporated Cass County zoning districts.

    • R-1 setbacks are front 25 feet, rear 30 feet, and side 10% of lot width.
    • Agricultural setbacks include 50 feet from federal and state highway rights-of-way, 35 feet from county or township road rights-of-way, and 35 feet from side and rear lot lines.

    R-1 front setback: >= 25 feet · R-1 rear setback: >= 30 feet · agricultural front setback from federal or state highway right-of-way: >= 50 feet · agricultural front setback from county or township road right-of-way: >= 35 feet · agricultural side and rear setback: >= 35 feet

    “The minimum front setback requirement for all structures constructed in an agricultural district must be at least fifty (50) feet from federal highway right-of way, fifty (50) feet from state highway right-of-way and thirty-five (35) feet from county or township road right-of-way.”
    2 more reviewed findings on this topic
    • Specified — Structures in Cass County zoning districts.
      “The minimum side and rear setback requirements for residences or detached structures constructed in an agricultural district must be at least thirty-five (35) feet.”
    • Specified — Structures and residences constructed in the Cass County Agricultural District.
      “The minimum side and rear setback requirements for residences or detached structures constructed in an agricultural district must be at least thirty-five (35) feet.”
  • Building heightDistrict specific (with conditions)

    Buildings and structures regulated by Cass County zoning districts in unincorporated Cass County.

    • The ordinance establishes multiple districts, including Agricultural, Conservation, Residential R-1 through R-4, Business B-1 through B-3, Industrial M-1 through M-3, and Planned Development.
    • R-1, R-2, and R-3 have 35-foot maximum-height provisions; R-4 has a 45-foot maximum-height provision.
    • Agricultural structures such as barns, silos, and windmills may not exceed twice their distance from the nearest lot line.
    • Public or semipublic facilities may be erected to 60 feet only if required yards are increased at least 1 foot for each foot above the district maximum.
    • Architectural projections, special structures, essential services, utilities, water towers, electric power and communication transmission lines are exempt from district height limitations.
    • Communication structures may not exceed three times their distance from the nearest lot line.

    R-1 maximum height: 35 feet · R-2 maximum height: 35 feet · R-3 maximum height: 35 feet · R-4 maximum height: 45 feet · public or semipublic facility maximum height: 60 feet (required yards increase at least 1 foot for each foot above the district maximum) · communication structure height: <= 3 times distance from nearest lot line · agricultural structure height: <= 2 times distance from nearest lot line

    “The district height limitations stipulated elsewhere in this ordinance may be exceeded, but such modification shall be in accord with the following:”
  • Living in an RVTemporary only (with conditions)

    Temporary use of lots of record by wheeled vehicles designed for sleeping or camping.

    • A temporary permit from the Zoning Enforcement Officer is required.
    • Occupancy may not exceed 182 days per calendar year.
    • The vehicle may not be permanently attached to septic or water, must be removable, screened or fenced, renewed annually, currently licensed, at least 100 feet from property lines, and placed on a lot of at least three acres.
    • The lot owner, vehicle owner, and occupant must be the same.

    maximum occupancy: <= 182 days per calendar year · minimum lot size: >= 3 acres · minimum distance from property lines: >= 100 feet

    “The vehicle may not be occupied more than 182 days per calendar year.”
  • Camping on your landLimited

    Temporary camping by wheeled vehicles designed for sleeping or camping on lots of record.

    • Temporary Zoning Enforcement Officer permit required.
    • The 182-day annual limit and all vehicle, screening, setback, lot-size, renewal, licensing, and ownership conditions apply.

    maximum occupancy: <= 182 days per calendar year

    “temporary usage of lots of record, either with or without dwellings may be permitted for wheeled vehicles designed for sleeping or camping by temporary permit from the Zoning Enforcement Officer”
  • Manufactured homesLimited

    Mobile or manufactured homes in county residential zoning districts.

    • Mobile homes are expressly listed as permitted in the R-3 Single-Family Residential District only when Section 18.2 Mobile Home Park Regulations is complied with.
    • Other district, placement, foundation, and permit requirements may apply.
    “Mobile homes (providing Section 18.2, Mobile Home Park Regulations is complied with)”
  • Who permits septicCounty

    Private sewage disposal systems within Cass County.

    • The county ordinance incorporates the Illinois Private Sewage Disposal Licensing Act and Code.
    “It shall be unlawful for any person to construct, alter or extend individual sewage disposal systems within Cass County unless he holds a valid permit issued by the Health Department”
  • Septic permitRequired

    Construction, alteration, or extension of individual sewage disposal systems in Cass County.

    • The permit is issued by the Health Department.
    • The Board of Health may refuse a permit where public or community sewerage is available.
    • A permit to construct is valid for six months from issuance; if construction has not started within that period, the permit is void.
    • Applications must include sufficient data and a complete proposed-facility plan.

    application decision period: 15 days · permit validity: 6 months (void if construction has not started)

    “2.8 Said permit to construct is valid for a period of six months from date of issuance. If construction has not started within this period, the permit is void.”
  • Septic inspectionRequired

    Private sewage disposal systems in Cass County, including homeowner-installed systems serving a personal residence.

    • The system may not be covered or placed in operation until inspected and written approval is issued by the Health Department.
    • The Health Department may inspect during construction and may require covered portions to be uncovered.
    “An individual sewage disposal system which has been installed by a homeowner for his personal residence shall not be covered or placed in operation until the said installation shall have been inspected and written approval of the said system shall have been issued by the Health Department.”
  • Off-grid sanitationAllowed (with conditions)

    Private sewage disposal systems used instead of public sewer in Cass County.

    • A valid Health Department permit is required.
    • Public or community sewer availability may prevent issuance of a private sewage permit.
    • The system must comply with county and incorporated state standards.
    “It shall be unlawful for any person to construct, alter or extend individual sewage disposal systems within Cass County unless he holds a valid permit issued by the Health Department”
  • Mandatory utility hookupConditional

    Private sewage disposal applications where public or community sewerage may be available.

    • The Board of Health may refuse a private sewage permit when a public or community sewer is available.
    • A sewer is deemed available when a line adjoins or abuts the premises, or when a practical permitted connection is within the stated reasonable distance; for commercial establishments, subdivisions, or multi-family dwellings, reasonable distance is not greater than 1,000 feet.

    reasonable distance for commercial establishment, subdivision, or multi-family dwelling: <= 1000 feet (public sewer connection must be practical and permitted)

    “The Board of Health or its Authorized Representative may refuse to grant a permit for the construction of a private sewage disposal system where public or community sewerage systems are available.”
  • Agricultural exemptionConditional

    Land used for agricultural purposes and buildings or structures used or to be used for agricultural purposes in unincorporated Cass County, subject to the Cass County Zoning Ordinance.

    • The ordinance generally does not impose regulations or require permits for agricultural land or agricultural buildings and structures.
    • The exemption does not eliminate regulation of building or setback lines for agricultural buildings or structures.
    • The exemption does not eliminate the minimum lot size for residences on agricultural land.
    • The Agricultural District requires at least 3 acres for a single-family residence or detached structure.
    • Agricultural District residences also have minimum living area of 800 square feet, minimum width of 14 feet, minimum public-road frontage of 20 feet, front setbacks of 50 feet from federal or state highway rights-of-way and 35 feet from county or township road rights-of-way, and minimum side and rear setbacks of 35 feet.
    • Nonagricultural uses, buildings, or structures in Agricultural Zones remain subject to regulations and permit requirements.
    • Other applicable federal, state, and local laws and regulations may still apply.

    Agricultural District minimum lot size for single-family residence or detached structure: >= 3 acres · Agricultural District minimum living area: >= 800 square feet · Agricultural District minimum residence width: >= 14 feet · Agricultural District minimum public road frontage: >= 20 feet · Agricultural District front setback from federal highway right-of-way: >= 50 feet · Agricultural District front setback from state highway right-of-way: >= 50 feet · Agricultural District front setback from county or township road right-of-way: >= 35 feet · Agricultural District side and rear setback for residence or detached structure: >= 35 feet

    “the regulations of this ordinance shall not be construed to impose regulations or require permits with respect to land used for agricultural purposes, as herein defined, or with respect to the erection, maintenance, repair, alteration, remodeling or extension of buildings or structures used or to be used for agricultural purposes upon such land.”
    One more reviewed finding on this topic
    • Available (with conditions) — Land and buildings used for agricultural purposes in unincorporated Cass County.
      “the regulations of this ordinance shall not be construed to impose regulations or require permits with respect to land used for agricultural purposes”
  • Subdividing landLimited

    Planned development projects treated as subdivisions under Cass County zoning procedures.

    • Planned development projects must follow the subdivision approval procedure in the Subdivision Regulations Ordinance.
    • The cited provision concerns planned development projects and does not establish the complete county subdivision code.
    “For procedural purposes, a Planned Development Project shall be treated as a subdivision, and the procedure for subdivision approval, as set forth in the Subdivision Regulations Ordinance, and shall be followed in its entirety whether the development shall be in single or divided ownership.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Planned-development projects and subdivision approval within county zoning jurisdiction.
      “For procedural purposes, a Planned Development Project shall be treated as a subdivision, and the procedure for subdivision approval, as set forth in the Subdivision Regulations Ordinance, and shall be followed in its entirety whether the development shall be in single or divided ownership.”
  • Building in a floodplainLimited

    Development within the county zoning jurisdiction and floodplain regulations.

    • The county zoning page identifies flood plain regulations as part of the zoning ordinance.
    • No numeric floodplain development standard was extracted in this pass.
    “All lands determined to be in the flood plain shall be subject to the procedures and regulations established in this section.”
    One more reviewed finding on this topic
    • Limited — Development subject to Cass County zoning and floodplain regulations.
      “All lands determined to be in the flood plain shall be subject to the procedures and regulations established in this section.”
  • Permit feesVariable (with conditions)

    County zoning petitions, use permits, certificates of compliance, variations, and appeals.

    • Fees are established by County Board action from time to time and paid to the County Clerk.
    • No general residential building-permit fee schedule was located.
    “Fees pertaining to petitions for zoning amendments, use permits, certificates of compliance, variations, and for appeals to the Board of Zoning Appeals shall be established by action of the County Board from time to time.”
  • Permit processPublished (with conditions)

    County zoning and building-permit process for commercial and residential projects.

    • Applicants are directed to contact the Cass County Zoning Officer before proceeding.
    • Applications for building permits are available from the Zoning Officer.
    • Variances, conditional uses, special-use permits, and rezoning requests are processed by the Zoning Officer.
    “Property owners and contractors can obtain applications for building permits and receive assistance by contacting the Cass County Zoning Officer.”
    One more reviewed finding on this topic
    • Published (with conditions) — County zoning and building-permit process.
      “Property owners and contractors can obtain applications for building permits and receive assistance by contacting the Cass County Zoning Officer.”

Illinois rules that apply here

  • Owner-builder exemptionConditional

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

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

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

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

    Construction of a new water well, modification of an existing water well, or sealing of an abandoned water well in Illinois.

    • A permit must be obtained from the Illinois Department of Public Health or an approved local health department before work begins.
    • The application must use Department or approved local health department forms and include a plan and drawing of the proposed construction.
    • The plan must include the lot size, slope, property lines, distances to septic tanks, abandoned wells, property lines, seepage fields, sewers, and other contamination sources; driller license number and name; estimated daily pumping capacity if greater than 100,000 gallons per day; well location; owner name and address; well type; estimated depth; well-use type; and proposed aquifer.
    • The permit is void if construction has not commenced within one year after issuance.
    • The permit fee for constructing, deepening, modifying, or sealing a water well may not exceed $100.
    • The Department will deny a permit request when available information indicates groundwater contamination exceeds Class I groundwater standards, subject to the treatment approval provision in subsection (f)(2).
    • The permittee must notify the Department, approved local health department, or approved unit of local government by telephone or in writing at least two days before work begins.

    maximum water well permit fee: <= 100 USD · permit commencement deadline: 1 year after issuance (Permit is void if construction has not commenced within that period.) · pre-work notification: >= 2 days (Notification may be by telephone or in writing.)

    “A permit to construct a new water well, modify an existing water well or seal an abandoned water well shall be obtained from the Department or approved local health department prior to start of work.”
    One more reviewed finding on this topic
    • Required — New private water-well construction applicable in Illinois, including Cass County.
      “To ensure the safety of these water supplies, the division and local health departments review water well installation plans, issue permits for new well construction and inspect wells.”
  • 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.”
  • Short-term rentalsLimited

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

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

    rental period: < 30 consecutive days

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

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

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

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

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

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

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

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

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

Still unanswered

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

  • Lot coverage — Lot coverage limits in unincorporated Cass County.
  • Tiny homes — Tiny-home occupancy.
  • Accessory dwellings — Accessory dwelling units.

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 Cass County, Illinois

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

Cass County scores 64/100 on the Bolthole Index, a strong county profile. Its strengths: workable self-sufficiency basics (38.4″/yr rainfall) and manageable long-term carry cost.

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

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

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

Living in an RV on your own land in Cass County is allowed on a temporary basis only: Temporary use of lots of record by wheeled vehicles designed for sleeping or camping. A temporary permit from the Zoning Enforcement Officer is required. Occupancy may not exceed 182 days per calendar year. Confirm with the county before relying on it.

How much does land cost in Cass County, Illinois?

Land in Cass County runs about $7,711 per acre, based on the latest county data.

What is the water situation in Cass County?

Cass County gets about 38.4" of rain a year, with severe drought in roughly 2.9% of years.

How remote is Cass County?

A representative private-land location has about 11,381 people within a 30-minute drive and 1,428,833 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 Cass compares in Illinois

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