Alexander County, IL: Limited Building Permits

Alexander County, Illinois has not published a confirmed building-permit requirement for unincorporated land; Illinois leaves building permits for private construction to the local government with jurisdiction¹². Statewide baseline building codes still apply, while countywide zoning remains unconfirmed³⁴. Southern Seven Health Department handles private sewage throughout Alexander County, issuing septic permits and inspecting new systems⁵⁶⁷.

At a glance

Building permit: Alexander County's local requirement is unconfirmed; Illinois leaves private-project permits to the local government with jurisdiction¹²
Zoning: Countywide zoning could not be confirmed; ask the Alexander County courthouse about the parcel's jurisdiction⁴⁸
Septic permit: Required through Southern Seven Health Department for private sewage systems in Alexander County⁵⁶
Private well: Get a water-well permit through Southern Seven before drilling⁹
RV or tiny home: Private-land occupancy rules are unconfirmed; ask the county and Southern Seven before moving in⁸¹⁰
Owner-builder: A narrow owner-occupant exemption covers qualifying plumbing work, not general construction permits¹¹¹²
Septic soil difficulty: Only 9.8% of mapped soils rate without severe limits for a conventional drain field¹³

Who to call

Building permits

Alexander County Courthouse

General county contact and referral to the department responsible for parcel-specific building, zoning and floodplain questions

618-734-7000

2000 Washington Ave, Cairo, IL

Septic permits

Southern Seven Health Department Environmental Health

Private sewage applications and permits, new-system inspections, private-water-supply inspections and water-well permits in Alexander County

(618) 634-2297 ext: 973114

madams@s7hd.org

37 Rustic Campus Dr. Building C, Ullin, IL 62992

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

Off-grid gear

Going off-grid in Alexander 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 Alexander County, Illinois?

Alexander County's building-permit requirement for unincorporated land could not be confirmed from a current county rule or application¹. Illinois does not issue building permits, conduct plan review or perform building inspections for privately funded construction; any such requirement belongs to the municipality, village, city or county with jurisdiction¹⁴¹⁵. Statewide baseline building codes have applied since 2025, with different requirements for jurisdictions that have and have not adopted a compliant local code³. Before ordering plans or starting site work, call the Alexander County Courthouse and ask which office has jurisdiction over the parcel, whether the project needs a building permit and which code pathway applies⁸. Inside a city or village, that municipality may control building permits and zoning; Southern Seven still issues septic permits for private sewage systems in Alexander County²⁵⁶.

Who handles building permits in Alexander County, and how do you reach them?

A current Alexander County office page identifying a building-permit issuer or residential building inspector could not be confirmed. Start with the Alexander County Courthouse at 2000 Washington Ave, Cairo, IL, or call 618-734-7000 and request the department responsible for building, land-use and floodplain questions for the parcel⁸. Ask whether the land is under county or municipal jurisdiction, whether a building permit or inspection is required, and whether an occupancy certificate is issued; Illinois leaves those private-project functions to the applicable local government rather than the state²¹⁶¹⁷. In a jurisdiction without an adopted building code, a non-state commercial building must be inspected by a qualified inspector for compliance with the applicable codes¹⁸. Building-permit and zoning authority may change at a city boundary, but Southern Seven's separate septic permits and private-well permits still cover Alexander County⁵⁶⁹.

Does Alexander County have zoning?

Countywide zoning in Alexander County could not be confirmed from a current official ordinance, zoning map or county planning page⁴. That gap does not establish that a parcel is unrestricted: incorporated municipalities may apply their own rules, and Illinois law allows county zoning outside municipalities with municipal zoning ordinances¹⁹. Where zoning exists, actual setbacks and building-height limits come from the applicable local district rather than one statewide measurement¹⁹²⁰. Ask the Alexander County Courthouse to identify the authority for the parcel and confirm allowed residential use, minimum lot or dwelling size, setbacks, height, accessory buildings and subdivision review in writing⁸. The same jurisdiction check matters for agricultural buildings because no Alexander County agricultural exemption was confirmed. Qualifying owner occupants may perform plumbing work on their own single-family residence, but that narrow exemption does not waive general construction permits or every local plumbing permit and inspection¹¹¹²²¹.

How do septic permits work in Alexander County?

Southern Seven Health Department administers private sewage disposal throughout Alexander County, including land inside municipalities⁵. A Southern Seven septic permit is required for a private sewage system: the department reviews applications, issues septic permits and inspects new systems⁶⁷. Contact Southern Seven Environmental Health at (618) 634-2297 ext: 973114, madams@s7hd.org, or 37 Rustic Campus Dr. Building C, Ullin, IL 62992 before construction¹⁰. Site feasibility deserves attention before purchase because only 9.8% of mapped Alexander County soils rate without severe limitations for a conventional drain field¹³. Illinois approves certain privies and specialized toilets for human waste when their technical conditions are met, but other domestic wastewater still requires a conventional private sewage disposal system²².

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

A current Alexander County rule specifically allowing or prohibiting long-term RV occupancy, temporary private-land camping or tiny-home occupancy could not be confirmed. Illinois campground law regulates qualifying campgrounds, not the separate question of living in one RV on a private parcel²³. Illinois also regulates manufactured-home installation and qualifying manufactured-home communities, while allowing local zoning, building, floodplain and utility rules to apply²⁴. Before buying or moving a unit, ask the Alexander County Courthouse which local authority controls the parcel and whether the proposed use needs land-use or occupancy approval⁸. Ask Southern Seven how drinking water and every wastewater stream must be handled, because private sewage needs plan approval and a new private well needs a permit²⁵⁹.

Building a home in Alexander County: what are the steps?

Call the Alexander County Courthouse to identify whether the county or a municipality has jurisdiction over the parcel⁸.
Ask that authority to confirm the building-permit, inspection, occupancy, zoning and setback requirements before plans are finalized²¹⁶¹⁷.
Check floodplain status early; some rural floodway work requires an Illinois Department of Natural Resources permit before construction²⁶.
Contact Southern Seven for private-sewage feasibility, the required septic permit and inspection of the new system⁵⁶⁷.
Apply through Southern Seven before drilling a new private well⁹.
Identify the road owner; work within a state-maintained road right-of-way requires an IDOT permit before work begins²⁷.
Complete every inspection and local occupancy step confirmed by the authority with jurisdiction¹⁶¹⁷.

What should you check before buying land in Alexander County?

Make septic suitability a purchase contingency because only 9.8% of mapped soils rate without severe limitations for a conventional drain field¹³. Confirm the water plan too: a permit is required before drilling a new private well⁹. Review flood maps early because some rural floodway work requires an Illinois Department of Natural Resources permit, and the state may require a permit anywhere in the floodplain when no floodway has been delineated²⁶. Identify who owns the frontage road because access work on a state-maintained right-of-way requires an IDOT permit²⁷. Countywide figures provide context rather than a parcel valuation: farmland value averages about $5,148 per acre, the effective property-tax rate is about 1.6%, and the median annual property-tax bill is about $966²⁸²⁹³⁰. Finally, get the parcel's local permit and zoning status from the Alexander County Courthouse before treating the land as buildable⁸.

Watch-outs

No published Alexander County building-permit rule, building-inspection process or occupancy-certificate process was confirmed; ask the courthouse which local authority handles the parcel⁸.
Countywide zoning, parcel setbacks and minimum dwelling size remain unconfirmed, so the absence of a county zoning page should not be read as unrestricted use⁴.
Conventional septic conditions may be difficult because only 9.8% of mapped soils rate without severe drain-field limitations¹³.
Floodplain development may need state approval before construction, including some rural floodway work and work where no floodway has been delineated²⁶.

Sources

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.

Compared with neighboring counties

Rule	Alexander County	Pulaski County	Union County	Johnson County	Massac County	Pope County	Jackson County
Building permit	Limited	Not required	Required	Limited	Limited	Limited	Not required
County zoning	Not published	No	Not published	Not published	Not published	Not published	No
Septic permits	Southern Seven Health Dept.	Southern Seven Health Dept.	Southern Seven Health Dept.	Southern 7 Health Dept.	Southern Seven Health Dept.	Southern Seven Health Dept.	County Health Dept.

How Alexander County scores

Seclusion57100% ev.

Self-Sufficiency62100% ev.

Admin Boringness7468% ev.

Durability45100% ev.

Property Autonomy42100% ev.

Carry Cost68100% 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 →

$46kTypical home

1.6%Property tax

$5,148Land / acre

49.1"Annual rain

4.7% of yrsSevere drought

14.5 / yr (+13.1)Mid-century 100°F days

16.6 daysMid-century dry spell

2.5" (+6.2%)Mid-century 1-day rain

1.73×Wildfire change factor

100%Forward climate coverage

$1,774Home insurance / yr

3.4% / yrInsurance growth

0%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

31,911People within 30 min

1,387,402People within 2 hr

54,467Radius comparison (15 mi)

19.9People / sq mi

23.7%Federal land

78.8%Land at 15% slope or less

9.8%Soils rated "not limited" for septic (strict USDA rating)

13,458 acWorkable land screen

49.1%Wooded land

48.3 tonsBiomass / forest ac

57.7°FAvg temp

Cities and towns in Alexander 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.

Cairo · Village of East Cape Girardeau · Village of McClure · Village of Tamms · Village of Thebes

Answers from the rulebook for Alexander County

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

Alexander County rules

Who permits septicLocal (with conditions)
Private sewage disposal in Alexander County, administered through the Southern Seven Health Department serving seven southern Illinois counties.
- The program serves Alexander, Hardin, Johnson, Massac, Pope, Pulaski, and Union Counties.
- IDPH regulates private sewage disposal statewide and local health agencies may act under local ordinance or as IDPH agents.
“issue septic permits [...] Serving: Alexander, Hardin, Johnson, Massac, Pope, Pulaski, & Union County”
Private Sewage Disposal & Water Supply Program - Southern 7 Health Department ↗Re-checked Oct 4, 2026
Septic permitRequired
Private sewage disposal systems in Alexander County served by the Southern Seven Health Department.
- The Southern Seven Health Department serves Alexander County and administers the private sewage disposal program for the district.
- The department reviews sewage system applications, issues septic permits, and inspects new sewage disposal systems.
- IDPH regulates private sewage disposal system installations and reviews and approves plans before construction.
- Surface-discharging systems may also require applicable Illinois EPA or federal NPDES coverage; this claim concerns the Southern Seven septic-permit process.
“Through the private sewage disposal program, our Environmental Health staff inspect pumper trucks, review sewage system applications, issue septic permits, offer guidance when designing a sewage disposal system, and inspect new sewage disposal systems. [...] Serving: Alexander, Hardin, Johnson, Massac, Pope, Pulaski, & Union County”
Private Sewage Disposal & Water Supply Program - Southern 7 Health Department ↗Re-checked Oct 3, 2026
One more reviewed finding on this topic
- Required — Private sewage disposal systems in Alexander County served by Southern Seven Health Department.
  “review sewage system applications, issue septic permits”
  Private Sewage Disposal & Water Supply Program - Southern 7 Health Department ↗Re-checked Oct 4, 2026
Septic inspectionRequired
New private sewage disposal systems in Alexander County served by Southern Seven Health Department.
- Southern Seven states that its Environmental Health staff inspect new sewage disposal systems.
“Through the private sewage disposal program, our Environmental Health staff inspect pumper trucks, review sewage system applications, issue septic permits, offer guidance when designing a sewage disposal system, and inspect new sewage disposal systems.”
Private Sewage Disposal & Water Supply Program - Southern 7 Health Department ↗Re-checked Oct 4, 2026

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
2 more reviewed findings on this topic
- Adopted (with conditions) — Statewide Illinois baseline building-code requirements applicable to Alexander County projects.
  “require statewide baseline building codes effective 1/1/2025.”
  Illinois Codes FAQ ↗Re-checked Oct 4, 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
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.”
Illinois Codes FAQ ↗Re-checked Sep 26, 2026
2 more reviewed findings on this topic
- Limited — Non-state commercial buildings in Illinois jurisdictions that have not adopted a building code, including potentially applicable projects in Alexander County.
  “Non-state buildings must be inspected by a qualified inspector stating the building complies with the above codes.”
  Building Codes and Regulations ↗Re-checked Oct 4, 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
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.”
Illinois Codes FAQ ↗Re-checked Sep 26, 2026
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.”
  Illinois Codes FAQ ↗Re-checked Sep 9, 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
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
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.”
77 Ill. Admin. Code 920.130, Water Well Permit Requirements ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Required — New private water wells in Alexander County, excluding community water wells.
  “issue permits for new well construction, and inspect wells.”
  Private Water & Closed Loop Wells ↗Re-checked Oct 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 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.”
Permit Program ↗Re-checked Sep 9, 2026
One more reviewed finding on this topic
- Limited — Construction and development in floodways and, where no floodway has been delineated, potentially anywhere in the floodplain in Alexander County.
  “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 - Illinois Department of Natural Resources ↗Re-checked Oct 4, 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)
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 Program ↗Re-checked Sep 9, 2026
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.”
Permit Application and Instructions ↗Re-checked Sep 9, 2026
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.”
Youth Camps and Campgrounds ↗Re-checked Sep 9, 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

Still unanswered

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

County-wide zoning — Countywide zoning authority or zoning ordinance in Alexander County.
Local zoning — Aggregate zoning status across Alexander County municipalities and unincorporated areas.
Zoning districts — Published zoning districts or zoning maps for Alexander County.
Minimum dwelling size — Minimum dwelling-size requirements in Alexander County.
Minimum lot size — Minimum lot-size requirements in Alexander County.

8 more unanswered

Lot coverage
Living in an RV
Camping on your land
Tiny homes
Accessory dwellings
Mandatory utility hookup
Agricultural exemption
Subdividing land

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Alexander County, Illinois

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

Alexander County scores 67/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost.

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

Alexander County requires a building permit only in limited cases (such as floodplains or specific zones). Onsite septic is permitted by Southern Seven Health Department. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Alexander County, Illinois?

Land in Alexander County runs about $5,148 per acre, based on the latest county data.

What is the water situation in Alexander County?

Alexander County gets about 49.1" of rain a year, with severe drought in roughly 4.7% of years.

How remote is Alexander County?

A representative private-land location has about 31,911 people within a 30-minute drive and 1,387,402 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 Alexander County, Illinois

At a glance

Who to call

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

Who handles building permits in Alexander County, and how do you reach them?

Does Alexander County have zoning?

How do septic permits work in Alexander County?

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

Building a home in Alexander County: what are the steps?

What should you check before buying land in Alexander County?

Watch-outs

Sources

Compared with neighboring counties

Alexander County in Illinois

How Alexander County scores

Find land. Bring the promising ones back.

Parcel due diligence

Cities and towns in Alexander County

Answers from the rulebook for Alexander County

Alexander County rules

Illinois rules that apply here

Still unanswered

Living off-grid in Alexander County, Illinois

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

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

How much does land cost in Alexander County, Illinois?

What is the water situation in Alexander County?

How remote is Alexander County?

How Alexander compares in Illinois