Unincorporated Randolph County, Illinois requires building permits for new structures, subject to a qualifying agricultural exemption, and county zoning controls land use.123 Municipalities with their own zoning codes handle building permits and zoning locally.4 The Randolph County Health Department issues septic permits and inspects private systems; Red Bud also requires a private-sewage permit signed by its City Superintendent.567
At a glance
- Building permit
- Required for new structures; qualifying agricultural exemption applies12
- Zoning
- County zoning applies outside municipalities with their own zoning codes89
- Septic permit
- County Health Department permit and inspection; Red Bud also requires city approval1067
- Manufactured home
- Conditionally allowed; individual-lot homes need a permanent foundation11
- RV living
- Private-lot occupancy rule not confirmed; ask Land Resource Management12
- Agricultural structures
- Permit exemption is conditional; district setbacks still apply13
- Private well
- Permit required through the county Health Department14
Who to call
Building permits
Randolph County Land Resource Management Office
Building permits, zoning-compliance certificates, zoning administration, floodplain administration and subdivision administration
1 Taylor, Room 207, Chester, IL 62233-1954
Septic permits
Randolph County Health Department
Private sewage disposal permits and inspections, failed-system complaints, and private-well permits and inspections
2515 State St., Chester, Illinois 62233
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 Randolph County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Randolph County, Illinois?
Every new structure built or placed in unincorporated Randolph County needs a building permit regardless of size or cost, subject to the exemption for qualifying agricultural land and structures; the county also administers building permits in municipalities without their own zoning ordinance.152 The initial zoning-compliance certificate lasts 1 year and may be renewed in 1-year periods during a good-faith effort to complete the work.16
A final zoning-compliance certificate follows an inspection confirming that the work matches the approved plan.17 We could not confirm a complete building-code inspection schedule; ask Land Resource Management which inspection stages apply.18 Illinois has statewide baseline building-code requirements, while building permits and inspections for private construction are handled locally.192021
Who issues building permits in Randolph County, Illinois?
Randolph County Land Resource Management issues county building permits and zoning-compliance certificates for unincorporated land and municipalities without their own zoning ordinance.4 Contact the office at 1 Taylor, Room 207, Chester, IL 62233-1954, or (618) 826-5000, Ext. 228.12 Sparta and Red Bud administer their own building permits.2223 The county Health Department handles septic permits and inspections, while Red Bud also requires a private-sewage permit signed by its Superintendent.567
Submit a signed county application and site drawing showing setbacks; a single-family residence also needs house plans and septic approval.24 The published zoning fee is $35 unless exempt or waived; the building fee is $2 per $1,000 of structure value, with a $5 minimum.25 Starting construction before application submission or permit issuance adds a $25 late filing fee.1
Does Randolph County, Illinois have zoning?
Randolph County zoning applies to unincorporated land and municipalities without their own zoning ordinance.3 Sparta and Red Bud set their own zoning inside city limits.2627 County Health Department septic approval remains relevant, and Red Bud also requires its Superintendent’s private-sewage permit.57
County Agricultural District lots require 30 acres, and Rural Single-Family Residential lots require 1 acre; soil-absorption sewage systems also require at least 1 acre.28 Setbacks vary by district, and maximum principal-structure height is 35 feet in the residential and commercial districts.2930 Accessory structures cannot serve as dwellings, although a separate additional family dwelling may qualify on agricultural land under relationship rules.3132 Agricultural exemptions depend on agricultural use, preserve district setbacks and do not cover residences occupied by people not engaged in agriculture.2
How do septic and well permits work in Randolph County?
The Randolph County Health Department administers private sewage disposal in Randolph County, issues septic permits and inspects system construction and installation.56 A complete application and soil investigation are required before construction approval, and a septic permit must come before a county building permit.1033 In county-zoned territory, a single-family residence must connect when an available-capacity public sewer is within 300 feet; otherwise, a compliant private sewer system must be installed and used.34
Published septic-permit fees are $350 for a new system, $200 for a repair and $175 for a holding tank.35 Only 12.6% of county soils are rated without severe limitations for conventional drain fields, so test wastewater feasibility early.36 The Health Department also permits private wells, with a published $100 fee for construction, modification or abandonment.14 Inside Red Bud, a private sewage system also requires a written permit signed by the City Superintendent before construction.7
Can you live in an RV or tiny home in Randolph County?
We could not confirm a general rule allowing long-term RV occupancy on a private lot in unincorporated Randolph County; ask Land Resource Management about the proposed use, duration and sanitation.12 County-administered Rural Single-Family Residential and Community Residential districts require special-use approval for travel-trailer parks; RV parks in the Rural Single-Family Residential district must also conform to state requirements.37 The park definition includes private or leased lots used for weekend homes, but temporary park occupancy does not authorize permanent residence in an individual RV outside a park.38
We could not confirm a specific tiny-home occupancy rule or minimum dwelling floor area; new structures still need building permits, and accessory structures cannot serve as dwellings.1531 Individual-lot manufactured homes need district-compliant lots and setbacks, a permanent foundation and special-use approval in the residential districts.11 Mobile-home parks need at least 2 acres, width and depth of at least 250 feet, 25-foot park-boundary setbacks and a maximum structure height of 35 feet.39
Building a home in Randolph County: what are the steps?
- Confirm whether county or municipal zoning and building permits control the parcel; the county Health Department handles septic permits, and Red Bud also requires its Superintendent’s private-sewage permit.457
- Confirm the district, allowed use, minimum lot area, setbacks and height.40412942
- Verify permanent street access and ask whether work in a county road right-of-way needs the County Highway Superintendent's driveway permit.4344
- Obtain the septic permit before the county building permit.45
- Submit the signed building-permit application, site drawing and, for a single-family home, house plans.16
- Complete the county zoning and floodplain compliance inspection before final certification.46
What should you check before buying land in Randolph County?
Start with jurisdiction and zoning district because municipal rules may replace county zoning and building permits, while the county Health Department handles septic permits and Red Bud also requires its Superintendent’s private-sewage permit.457 Under county zoning, the district determines permitted use, lot size, setbacks and height.412942 County subdivision review requires road-entrance and sewage approvals plus an engineer-signed drainage report; final plats need County Board approval before recording.47 An entrance crossing county road right-of-way may also require a driveway permit from the County Highway Superintendent.44
Make wastewater feasibility a contract contingency because only 12.6% of soils are rated without severe limitations for a conventional drain field.36 Determine whether nearby public sewer requires connection and whether an existing well was permitted.4814 Land Resource Management reviews construction and subdivision applications in flood-hazard locations, where flood-resistant design, drainage and protected utilities may be required.49
Watch-outs
- Red Bud requires a City Superintendent-signed private-sewage permit before construction, alongside the county Health Department’s septic program.75
- An agricultural zoning and permit exemption applies only to qualifying agricultural land and structures; agricultural structures still must meet district setbacks.13
- A private soil-absorption sewage system requires a lot of at least 1 acre.41
- The owner-builder exemption, private-lot RV rule, general tiny-home rule and separate occupancy certificate remain unconfirmed; ask Land Resource Management.12
Sources
- Land Resource Management – Randolph County, Illinois, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Land Resource Management – Randolph County, Illinois, quoted and re-checked
- Land Resource Management – Randolph County, Illinois, quoted and re-checked
- Environmental Health – Randolph County, Illinois, quoted and re-checked
- Environmental Health – Randolph County, Illinois, quoted and re-checked
- Red Bud: Private Sewage Disposal (Randolph County), quoted and re-checked
- Randolph County Zoning Code (2026 county census)
- Randolph County Zoning Code, quoted and re-checked
- Environmental Health – Randolph County, Illinois, quoted and re-checked
- Randolph County Zoning Code, quoted and re-checked
- Randolph County Land Resource Management Office (randolphcountyil.gov)
- Randolph County Zoning Code, quoted and re-checked
- Environmental Health – Randolph County, Illinois, quoted and re-checked
- Land Resource Management – Randolph County, Illinois, quoted and re-checked
- Randolph County Zoning Code, quoted and re-checked
- Revised Code of Ordinances of Randolph County Illinois, quoted and re-checked
- Land Resource Management – Randolph County, Illinois, quoted and re-checked
- Building Codes and Regulations (Illinois statewide rule), quoted and re-checked
- Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
- Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
- Sparta: § 150.050 Permit Required for Construction or Alterations (Randolph County), quoted and re-checked
- Red Bud: International Residential Building Code Adopted (Randolph County), quoted and re-checked
- Application for Initial Certificate of Zoning Compliance & Building Permit, quoted and re-checked
- Application for Initial Certificate of Zoning Compliance & Building Permit, quoted and re-checked
- Sparta: official source (Randolph County), quoted and re-checked
- Red Bud: Zoning & Planning - City of Red Bud, Illinois (Randolph County), quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- randolphcountyil.gov, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Ordinance 2024, quoted and re-checked
- Environmental Health – Randolph County, Illinois, quoted and re-checked
- 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
- randolphcountyil.gov, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph County Zoning Code, quoted and re-checked
- Randolph County Zoning Code, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- randolphcountyil.gov, quoted and re-checked
- Randolph County Zoning Ordinance 2024, quoted and re-checked
- Randolph County Zoning Code, quoted and re-checked
- Randolph County Subdivision Code, quoted and re-checked
- Randolph County Zoning Ordinance, quoted and re-checked
- Randolph 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.