Unincorporated Crawford County, Illinois has no county building department and no countywide zoning; the county's department list runs from Animal Control to the Highway Department with nothing in between for building or zoning12. Zoning inside Crawford County is a city matter — the City of Robinson, the county seat, has its own zoning and building code that only applies within Robinson's limits23. Septic is different: the Crawford County Health Department reviews plans and issues every private sewage permit in the county4. This is Crawford County, Illinois — a different county from Crawford County, Arkansas and the Crawford Counties in several other states, so confirm you're reading the right one before you call a number in this guide.
At a glance
- Building permit
- Not required in unincorporated Crawford County1
- Zoning
- None countywide; only municipalities like Robinson zone, inside their own limits23
- Septic permit
- Required through the Crawford County Health Department; $100 application fee456
- Septic system type
- Mostly surface-discharge (aeration/sand filter) systems; soil conditions block subsurface seepage fields in most of the county7
- Private well permit
- Required statewide through IDPH and the local health department8
- Manufactured home occupancy
- Allowed statewide as a dwelling9
- Driveway on a state highway
- IDOT permit required before work begins in the right-of-way10
Who to call
Septic permits
Crawford County Health Department
Private sewage (septic) system permits and inspections for Crawford County
202 N. Christopher Blvd., Robinson, IL 62454
Roads & driveways
Crawford County Highway Department
Construction and maintenance of the county highway system, including road and driveway permitting on county roads
10312 N 900th St, Robinson, IL 62454
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in Crawford County, Illinois?
Crawford County's own department list has no building or inspection office, and there's no county building permit for rural residential or commercial construction in unincorporated Crawford County, Illinois1. Illinois itself doesn't issue building permits either — that's a local-government responsibility everywhere in the state, and Crawford County hasn't set up that program11. Illinois's statewide baseline building-code law, effective January 1, 2025, still applies as a code floor even where no local permit exists, and a new or substantially improved commercial building can trigger a certified-inspection requirement in a jurisdiction without an adopted building code — that requirement is separate from any local permit and applies whether or not Crawford County itself issues permits1213.
Who handles septic, roads and other permits in Crawford County?
For septic, call the Crawford County Health Department, which reviews and approves every private sewage system plan before construction and charges a $100 application fee6. Reach them at 202 N. Christopher Blvd., Robinson, IL 62454, phone 618-544-87986. For anything touching county roads, including permitting for a new or modified access point, the Crawford County Highway Department covers 160 miles of county roads and lists permitting among its regular operations; call 618-544-2416 or visit them at 10312 N 900th St, Robinson, IL 6245414. There's no separate building or zoning office, since the county runs neither program12.
Does Crawford County have zoning?
Crawford County has no countywide zoning office or ordinance, so unincorporated land in the county isn't county-zoned2. Zoning here is a municipal matter: the City of Robinson, the county seat, has its own adopted building code chapter in its municipal code, and that only governs land inside Robinson's city limits, not the surrounding unincorporated county3. In practice that means unincorporated Crawford County has no confirmed county-set minimum lot size, setback, building height or RV/tiny-home occupancy rule on its own official pages — that's an absence of a county rule, not proof nothing applies, so confirm your parcel is truly outside Robinson (or any other Crawford County municipality) before assuming county silence settles the question.
How do septic permits work in Crawford County?
Every private sewage system in Crawford County needs a plan reviewed and approved by the county Health Department's environmental health staff before construction, along with a $100 application fee65. Soil here is a serious constraint, and the county says so plainly on its own page: in most of Crawford County, the majority of systems installed have an approved surface discharge, such as an aeration system or sand filter, because soil conditions prevent subsurface seepage-field systems in most areas6. That matches the numbers — only about 1% of Crawford County's soils carry no severe limits for a conventional septic drain field, even though 97.3% of the county's land is gentle, 15% slope or less, so flat ground here does not mean easy septic siting715. If your system will discharge to a water of the United States, it also needs Illinois EPA NPDES general permit coverage before it can operate, separate from the county's own private-sewage process16. A private well needs its own permit too, reviewed and issued by IDPH and the local health department before construction8.
Can you live in an RV or tiny home on your land in Crawford County?
No official Crawford County page states a rule for a single RV or tiny home parked on your own unincorporated land, so don't read the absence of a zoning department as a green light. Illinois's statewide campground rule covers a different situation — overnight camping in a licensed, inspected campground — and doesn't establish permission for RV living on a private, non-campground parcel17. A manufactured home itself is recognized statewide as a lawful dwelling, subject to installation and tie-down standards9. Since Crawford County has no zoning department to ask, your best move is to call the Highway Department or Health Department about your specific parcel, or check with Robinson's city offices if your land might fall inside its limits143.
Building a home in Crawford County: the steps, in order
- Confirm your parcel is truly outside Robinson or any other Crawford County municipality; those have their own zoning and building rules the county doesn't3.
- Apply for your septic permit with the Crawford County Health Department, budgeting for the $100 application fee and likely a surface-discharge system given local soils67.
- If a surface-discharging system will reach a water of the United States, get Illinois EPA NPDES general permit coverage before it goes into operation16.
- If you need a private well, get it permitted through IDPH and the local health department before drilling8.
- If your driveway will connect to a state highway, get an IDOT permit before work begins in the right-of-way; for a county road, check with the Highway Department first1014.
- Build to Illinois's statewide baseline residential code, effective January 1, 2025, even though Crawford County issues no separate local building permit12.
What to check before you buy land in Crawford County
Soil is the single biggest thing to check here: only about 1% of Crawford County's soils carry no severe limits for a conventional septic drain field, the tightest number in this guide series, and the county's own health department confirms most installed systems are surface-discharge aeration or sand-filter systems rather than buried drain fields7. Almost all of the county's land is gentle, 97.3% at 15% slope or less, and about 24.5% is wooded with roughly 1.3% federal land, so most tracts are open farmland151819. Severe drought is uncommon, hitting about 2.2% of years, against 45.1 inches of average annual precipitation2021. A typical home insurance premium runs about $1,506 a year, and the county's effective property tax rate is about 1.6%, with a median annual property tax bill around $1,769222324. Crawford County sits about 73 miles from the nearest metro area25.
Watch-outs
- Only about 1% of Crawford County's soils carry no severe limits for a conventional septic drain field; plan on a surface-discharge system like aeration or a sand filter rather than a buried drain field, and budget accordingly76.
- This is Crawford County, Illinois, not Crawford County in Arkansas or the several other states that share the name — double-check any office you call is the Robinson, Illinois one (area code 618)614.
- Crawford County has no zoning department, so there's no confirmed county rule for a single RV or tiny home on your own land; confirm with the county before you buy, and check whether your parcel is actually inside Robinson's city limits, where separate rules apply3.
Sources
- Crawford County, Illinois - County Government (2026 county census)
- Crawford County, Illinois - County Government (2026 county census)
- Robinson City Code – City of Robinson, Illinois, quoted and re-checked
- Crawford County Health Department - Private Sewage (2026 county census)
- Private Sewage Disposal, quoted and re-checked
- Crawford County Health Department (cchd.net)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Private Water & Closed Loop Wells, quoted and re-checked
- Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
- Highway Permits (Illinois statewide rule), quoted and re-checked
- Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
- Illinois Codes (Illinois statewide rule), quoted and re-checked
- Building Codes and Regulations, quoted and re-checked
- Crawford County Highway Department (crawfordcounty.illinois.gov)
- Share of land at 15% slope or less: Bolthole Index county data
- Illinois Surface Discharge Permit (ILG62), quoted and re-checked
- Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
- Wooded share of land: Bolthole Index county data
- Federal land share: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Annual precipitation: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
Written September 24, 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.