Richland County, Illinois has not published a confirmed general building-permit rule for ordinary homes in its unincorporated area; ask the County Clerk before starting work. Illinois does not issue building permits for privately funded construction, but statewide baseline building-code requirements apply.12 Richland County does require a permit for construction or alteration of a mobile-home park.3
At a glance
- Building permit
- General home rule unconfirmed; mobile-home parks require a county permit31
- County zoning
- No zoning ordinance in unincorporated Richland County4
- Septic
- Plans must be approved before construction under the Illinois program5
- Tiny homes
- No county zoning restriction in unincorporated areas; other rules still apply6
- Minimum home size
- No county zoning minimum in unincorporated areas7
- Private well
- Permit required before new construction, modification or sealing8
Who to call
Roads & driveways
Richland County Highway Department
County-highway entrances and culverts; the County Engineer also serves as County Floodplain Administrator
4334 N. Meridian Road, Olney, IL 62450
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Richland County, Illinois?
A general residential building-permit requirement for ordinary homes in unincorporated Richland County could not be confirmed, so ask the Richland County Clerk whether the planned work needs local approval before construction. Illinois itself does not issue building permits, review plans or perform inspections for privately funded projects; those functions, when required, belong to the applicable local government.19
The clear county exception is a mobile-home park: construction or alteration requires a permit, County Engineer approval must come before issuance, and the application carries a nonrefundable $25 fee.3 Illinois has also imposed statewide baseline building-code requirements since 2025, including a framework for places that have not adopted their own code.2 A lack of a confirmed county permit office therefore should not be read as freedom to ignore structural standards.
Who handles building permits in Richland County?
Richland County's published materials do not identify a general residential building department or zoning official for unincorporated land. The state does not issue private-project building permits or occupancy certificates; any such requirement is handled by the municipality or county with jurisdiction.110 Start with the Richland County Clerk for an ordinary home, addition or outbuilding, and ask who will confirm the applicable state baseline and any project-specific county ordinance.
Specialized work has clearer destinations. The County Engineer approves mobile-home-park applications before the county permit is issued.3 The Richland County Highway Department handles entrances on county-maintained roads, and the County Engineer is also the County Floodplain Administrator.11 A project inside or near an incorporated municipality may face municipal requirements even though the county has no zoning ordinance for unincorporated land.4
Does Richland County have zoning?
Richland County has no zoning ordinance for the unincorporated portions of the county.4 That removes county zoning limits on tiny-home occupancy, accessory dwellings, lot coverage, building height and minimum dwelling size in the unincorporated area, but building-code, septic, floodplain, subdivision, utility and municipal rules can still apply.61213147
Richland County does regulate more than zoning. The county has a setback-line ordinance, although the reviewed county material does not give its distances, and it regulates subdivisions in unincorporated areas.1516 The absence of a county zoning ordinance also does not answer what a city or village may require.4 Before choosing a house site, ask the County Engineer about the setback line and floodplain, and ask the relevant municipal clerk about rules for property in or near a municipality.
How do septic permits work in Richland County?
Private sewage disposal plans in Richland County must be reviewed and approved before construction under the Illinois program; a local health agency may conduct the review under its own ordinance or as an Illinois Department of Public Health agent.5 IDPH regulates conventional no-discharge systems and systems that discharge treated effluent to the ground surface at up to 1,500 gallons per day.17
Site suitability deserves attention early: only about 3.5% of Richland County soils avoid a “very limited” rating for conventional septic drain fields.18 That soil statistic does not decide whether a particular parcel will pass, but it makes plan approval and site-specific soil work an early due-diligence item. Illinois also permits specified off-grid sanitation options, including qualifying privies and composting, incinerating and recirculating toilets, while requiring other domestic wastewater to go to a conventional private sewage system.19 The responsible office for a particular Richland County septic application should be confirmed with IDPH before design work begins.
Can you live in an RV or tiny home in Richland County?
A tiny home on unincorporated Richland County land faces no county zoning restriction on occupancy and no county zoning minimum dwelling size, but building, septic, floodplain, subdivision, utility and municipal rules may still control the project.67 That is a zoning answer, not a promise that every tiny-home design or placement is approvable.
Long-term residential RV occupancy on a private parcel could not be confirmed from the county's published rules; ask the County Clerk and the septic authority before relying on an RV as a residence. Illinois campground licensing does not settle that private-parcel question because it applies to qualifying campground operations.20 Manufactured-home parks are different again: a park in unincorporated Richland County needs a county permit or license, and the county definition reaches parks with at least 5 occupied mobile homes.21 A single manufactured home should not automatically be treated as a park under that rule.
Building a home in Richland County: what are the steps?
- Confirm that the parcel is outside a municipality, because the county's no-zoning conclusion applies only to unincorporated Richland County.4
- Ask the County Clerk whether the proposed home, accessory building or site work needs a local permit or occupancy approval; Illinois does not issue those approvals for privately funded construction.110
- Take the site plan to the septic authority for approval before constructing the private sewage system.5
- Obtain an IDPH or approved local-health-department permit before constructing, modifying or sealing a water well.8
- Ask the County Engineer about the setback-line ordinance, floodplain status and any entrance on a county-maintained road.1511
- If access meets a state-maintained road, obtain the required IDOT right-of-way permit before work begins.22
What should you check before buying land in Richland County?
Put septic feasibility near the top of the offer contingency because only about 3.5% of county soils avoid a severe limitation rating for a conventional drain field.18 A private well also requires a permit before construction, modification or sealing, and the application must show the site relationship to sewage fields and other contamination sources.8
Check floodplain status with the County Engineer before placing a home or driveway; the engineer is Richland County's Floodplain Administrator.11 Construction in regulated Illinois floodways can require state authorization as well.23 Confirm road ownership because county-road entrances go through the Highway Department while state-highway access needs an IDOT permit.2422 For carrying costs, Richland County's effective property-tax rate is about 1.5%, and the median annual property-tax bill is about $1,618.2526
Watch-outs
- Do not treat Richland County's lack of county zoning as a waiver of its setback-line, subdivision, floodplain or trailer-park ordinances.41516
- A general owner-builder exemption and a general residential occupancy-certificate rule could not be confirmed; ask the Richland County Clerk before committing to a construction schedule.2710
- County-road entrance approval and state-highway access approval are separate paths, so identify the road authority before designing the driveway.2422
Sources
- Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
- Building Codes and Regulations (Illinois statewide rule), quoted and re-checked
- Richland County Code Book – Title XV: Land Usage, quoted and re-checked
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- Private Sewage Disposal, quoted and re-checked
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (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
- Richland County Highway Department (richlandcounty.illinois.gov)
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- Status of Zoning in Unincorporated Portions of Richland County, Illinois, quoted and re-checked
- Richland County Code Book – Title XV: Land Usage, quoted and re-checked
- Private Sewage Disposal, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
- Youth Camps and Campgrounds, quoted and re-checked
- Richland County Code Book – Title XV: Land Usage, quoted and re-checked
- Highway Permits (Illinois statewide rule), quoted and re-checked
- Permit Program (Illinois statewide rule), quoted and re-checked
- Highway Department, quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- (2026 county census)
Written September 27, 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.