Unincorporated Kankakee County, Illinois requires building permits for new and temporary buildings, additions, renovations, demolitions, prefabricated structures, building systems and utility hookups1. The county also administers zoning in unincorporated areas2. Septic and private-well permits go through the Kankakee County Health Department34.
At a glance
- Building permit
- Required for listed construction and building-system work in unincorporated areas1
- Zoning
- County-administered in unincorporated areas; most municipalities administer their own rules25
- Septic
- Kankakee County Health Department issues permits and inspects installations3
- Owner-builder
- A homeowner may do the work, but still needs the permit and applicable inspections6
- Septic soils
- Only about 2% of soils rate free of severe limits for a conventional drain field7
- Private well
- Kankakee County Health Department issues permits where public water is unavailable4
- Permit fees
- Variable, based on estimated project value including materials and labor8
- Nearest city of 100,000+
- About 29 miles away, straight-line9
Who to call
Building permits
Kankakee County Building Division (Planning Department)
Building permits, plan review, code enforcement, contractor registration, and floodplain management for unincorporated Kankakee County
189 E. Court Street, Kankakee, IL 60901
Septic permits
Kankakee County Health Department, Environmental Health / Septic Program
Septic system construction permits, installation inspections, evaluation of existing systems, and dye testing for suspected failures in Kankakee County
2390 W Station St, Kankakee, IL 60901
Roads & driveways
Kankakee County Highway Department
County road and highway maintenance for Kankakee County; a starting point for questions about access to a county-maintained road
750 S East Avenue, Kankakee, IL 60901
Contact details are copied from each office’s official page and were checked against it on September 29, 2026.
Do you need a building permit in Kankakee County, Illinois?
Unincorporated Kankakee County, Illinois requires building permits for new and temporary buildings, additions, demolitions, renovations, prefabricated structures, electrical and plumbing systems, HVAC, water and sewer hookups, and other listed projects1. Kankakee County has adopted building regulations for the unincorporated area, and the Building Division enforces them1011. Permit fees vary with the estimated value of materials and labor; contact a county code official for an estimate8. A homeowner may perform all work on the homeowner's own project without county contractor registration, but the permit, plans, code requirements and inspections still apply; owner-performed plumbing also requires a plumbing affidavit6.
Who is the Kankakee County building department, and how do you reach them?
The Kankakee County Building Division, within the Planning Department, handles permits and adopted building regulations for unincorporated Kankakee County110. Reach the division at 189 E. Court Street in Kankakee or by phone at 815-936-550011. Its online portal accepts permit applications and supporting documents and lets applicants check status1211. The county's published process calls for parcel and owner information, a project description, plot plan, cost estimate or signed contract, and a contractor list; some projects also need a floodplain survey, recorded deed or construction plans12. The review target is 10 working days, but scope and application volume can change the timing12.
Does Kankakee County have zoning?
Kankakee County administers zoning in unincorporated areas, while many incorporated municipalities administer their own zoning; Cabery, Irwin, Reddick and Union Hill are identified as exceptions governed by the county code25. Each county district has its own allowed and special uses and bulk requirements13. For lots created through subdivision, minimum depth, width and area depend on the applicable zoning district and subdivision rules14. Principal-structure setbacks also vary by district, and accessory structures must be at least 10 feet from the principal structure or 5 feet from an interior lot line15. Ask the Building Division to identify the parcel's current district and requirements rather than relying on a general county summary11.
How do septic permits work in Kankakee County?
The Kankakee County Health Department issues private-septic permits and inspects installations, while Illinois regulates private sewage-disposal systems statewide316. Illinois requires plan approval before a new system is built and advance notice before construction, repair or modification17. Only about 2% of Kankakee County soils rate free of severe limits for a conventional drain field, so arrange the site evaluation before fixing the house location or purchase budget7. The same Health Department issues permits for private wells where public water is unavailable and inspects their installation4. Reach Environmental Health at 815-802-9400 or 2390 W Station Street in Kankakee18.
Can you live in an RV or tiny home on your land in Kankakee County?
We could not confirm a county rule that plainly allows or prohibits long-term RV occupancy, temporary camping or a site-built tiny home on private land. Ask the Building Division what the parcel's zoning district permits before buying or moving a unit there, because unincorporated Kankakee County has district-specific uses and bulk requirements21311. We also could not confirm a countywide minimum dwelling floor area. Illinois campground rules do not answer whether an owner may occupy one RV on private land19. A manufactured home still needs an Illinois-licensed installer, and state siting requirements apply20.
Building a home in Kankakee County, Illinois: the steps, in order
- Confirm whether the parcel is unincorporated and identify its zoning district; municipal zoning often differs from county zoning5.
- Verify district uses, lot dimensions and setbacks with the Building Division before fixing the site plan141511.
- Arrange septic evaluation and permitting, and obtain a county Health Department well permit if public water is unavailable34.
- Create a portal account and submit the building application with the required parcel, project, site-plan, cost and contractor information12.
- Confirm the fee estimate with a code official because fees depend on project value8.
- If acting as owner-builder, submit the same permit documents and any required plumbing affidavit; the exemption is from contractor registration, not permitting6.
- Resolve driveway spacing and floodplain approvals before construction where they apply2122.
What to check before you buy land in Kankakee County, Illinois
Confirm jurisdiction and zoning before making an offer: Kankakee County regulates unincorporated parcels, while many municipalities use their own rules5. If you intend to split land, county subdivision rules may require a plat, and lot dimensions must satisfy the applicable district2314. A qualifying owner may use the county's farmstead process to divide a farmstead from an agricultural parcel instead of rezoning24. Test soils before assuming a conventional septic field will work; only about 2% rate free of severe limits7. County zoning regulates driveway spacing, and access from a state-maintained highway requires an IDOT permit2125. Floodplain development can require county, state or federal review, so bring mapped-floodplain questions to the Building Division before siting improvements2211.
Watch-outs
- Kankakee County lets a homeowner perform work on the homeowner's own project without contractor registration, but permits, plans, inspections and any required plumbing affidavit still apply6.
- Most of Kankakee County's soils rate poorly for a standard septic drain field, so budget time and money for a site evaluation and possibly an engineered system before you commit to a lot7.
- County driveway-spacing rules and possible floodplain approvals can affect where improvements fit on a parcel; resolve both before finalizing a site plan2122.
Sources
- Guide to Obtaining a Building Permit, quoted and re-checked
- Kankakee County Developers Handbook, quoted and re-checked
- Septic Program, quoted and re-checked
- Application for Permit to Construct, Modify or Abandon a Water Well, quoted and re-checked
- Kankakee County Developers Handbook, quoted and re-checked
- Developers Handbook, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Guide to Obtaining a Building Permit, quoted and re-checked
- Distance to the nearest metro area: Bolthole Index county data
- Resolution 2014-02-11-18, quoted and re-checked
- Kankakee County Building Division (Planning Department) (planning.k3county.net)
- Building Permits, quoted and re-checked
- County of Kankakee Guide to Development, quoted and re-checked
- Kankakee County Code, Chapter 117 - Subdivisions, quoted and re-checked
- Frequently Asked Questions - Zoning, quoted and re-checked
- Private Sewage Disposal, quoted and re-checked
- 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
- Kankakee County Health Department, Environmental Health / Septic Program (kankakeehealth.org)
- Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
- Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
- Subdivision, quoted and re-checked
- County of Kankakee Guide to Development, quoted and re-checked
- Subdivision | Kankakee County, IL, quoted and re-checked
- Zoning Division | Kankakee County, IL, quoted and re-checked
- Highway Permits (Illinois statewide rule), quoted and re-checked
Written September 29, 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.