Scott County, Illinois appears not to require a county residential building permit in unincorporated areas, although the county does not publish a direct permit statement1. Countywide zoning also could not be confirmed, while the City of Winchester separately administers municipal zoning23. Septic plans go through the Scott County Health Department's Environmental Health division4.
At a glance
- Building permit
- Appears not required by the county in unincorporated areas; confirm before building1
- Zoning
- Countywide zoning is unconfirmed; Winchester administers its own zoning23
- Septic permits
- Handled by the Scott County Health Department's Environmental Health division4
- Septic process
- Plan approval required before construction, plus 48-hour notice before work begins56
- RV living
- Private-land occupancy is unconfirmed; qualifying campgrounds need a $100 state license7
- Manufactured homes
- Allowed statewide, subject to installation standards and any local zoning or covenants8
- Driveway on a state highway
- Needs an IDOT permit before work begins9
- Septic soil difficulty
- 33.6% of county soils are free of severe limits for a conventional drain field10
Who to call
Septic permits
Scott County Health Department, Environmental Health
Private sewage disposal (septic) plan review, water quality services, and private-well permits (to construct, modify, or abandon a water well) for Scott County
335 West Cherry St., Winchester, IL 62694
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 Scott County, Illinois?
Scott County, Illinois appears not to require a county residential building permit in unincorporated areas, based on the county's published office structure, but the county does not publish a direct permit statement1. Illinois does not issue building permits for privately funded construction; the applicable local government decides whether a permit is required11. Illinois likewise does not perform those building inspections or issue those occupancy permits at the state level1213. Illinois's statewide building-code framework took effect in 2025, with different requirements for jurisdictions that have adopted a compliant local code and those that have not14. Illinois does not require every county to adopt a local building code, and the available material does not identify a Scott County code edition15. Ask the Scott County Clerk to confirm the permit, inspection, code, and occupancy-certificate requirements for the parcel before construction.
Who handles septic permits in Scott County, and how do you reach them?
Scott County does not publish a separate building or zoning department in its office list12. The Scott County Health Department's Environmental Health division lists water quality services, private sewage disposal, private-well testing, and permits to construct, modify, or abandon a water well16. The Health Department is at 335 West Cherry St., Winchester, IL 62694, and can be reached at (217) 742-8203 or [email protected]16. Start there for septic and private-well work. For building permits, inspections, zoning, setbacks, and occupancy certificates, ask the Scott County Clerk to identify the responsible authority for the parcel because the county's published material does not resolve those questions12. If the parcel lies inside a city or village, contact that municipality as well because Illinois assigns permit questions to the applicable local unit of government11.
Does Scott County have zoning?
Scott County's office list includes no planning or zoning department, but the county does not publish a clear statement confirming or denying countywide zoning2. The City of Winchester has a zoning administrator and zoning appeals board, so land inside Winchester must be checked under city rules rather than the unincorporated-county answer3. Illinois law allows counties to create zoning districts and establish building or setback lines outside municipalities that have their own zoning17. County zoning can also regulate building height, but the applicable ordinance or district must supply the actual limit18. No countywide minimum lot size, minimum dwelling size, setback, lot-coverage limit, or building-height limit could be confirmed, so ask the County Clerk about the specific parcel2. Private covenants can also affect a property, so review the deed and title documents before buying.
How do septic permits work in Scott County?
Every new private sewage disposal system in Illinois, including replacement of a septic tank or a major component change, needs plan approval before construction begins, either from the Illinois Department of Public Health or the local authority — in Scott County, that's the Health Department's Environmental Health division516. Whoever constructs, installs, repairs, or modifies the system must notify the Department or the county at least 48 hours before work starts, and if covered work keeps the system from being viewed, you may have to uncover it for inspection6. Soils in Scott County are relatively favorable for this: 33.6% of the county's land is free of severe limitations for a conventional septic drain field, well above many rural counties, though a site evaluation is still the way to confirm a specific lot10. Off-grid options are allowed under the same state rules: privies, chemical toilets, recirculating toilets, incinerator toilets, compost toilets, and holding tanks are all approved private sewage disposal methods when built and maintained to the state's standards19. Whether the Scott County Health Department reviews these plans under its own local ordinance or as an agent of the state Department isn't stated on the page reviewed for this guide, but either way, that Health Department is the office to call first2016.
Can you live in an RV or tiny home on your land in Scott County?
Illinois treats a recreational area as a campground when it maintains at least 3 tents, cabins, RVs, or other shelters for camping, or provides camping space for at least 10 people over at least 6 camping days in a year; operating a covered campground requires a state license with a $100 nonrefundable fee7. That campground rule does not answer whether someone may live in an RV on private land in unincorporated Scott County21. Ask the County Clerk before relying on an RV as temporary or permanent housing. Illinois recognizes manufactured homes as dwellings, but installation standards, local zoning, and covenants may still apply822. Scott County's zoning status is unconfirmed, so placement of a manufactured home must be checked for the particular parcel2. Tiny-home occupancy, minimum dwelling size, and owner-builder exemptions also remain unconfirmed; ask the County Clerk and the Health Department about the structure and its sanitation plan before buying or building232.
What are the steps to build a home in Scott County?
- Ask the Scott County Clerk to confirm whether a building permit, inspection, county zoning review, or occupancy certificate applies to the parcel12. If the parcel is inside Winchester, check the city's zoning requirements3.
- If the project affects a covered floodway, contact the Illinois Department of Natural Resources before construction; qualifying rural streams use a drainage-area threshold of 10 square miles, while some minor work may already be authorized by a statewide permit24.
- Order the needed site and soil work, then obtain private-sewage-system plan approval through the Scott County Health Department before septic construction165.
- Give the Health Department or state Department at least 48 hours' notice before septic construction, installation, repair, or modification begins6.
- Obtain an IDOT permit before building a driveway in a state-maintained highway right-of-way9.
- For a manufactured home, follow Illinois installation standards and confirm local placement rules and covenants22.
What should you check before buying land in Scott County?
Only 33.6% of Scott County soils are rated without severe limitations for a conventional septic drain field, so make the Health Department's site requirements a purchase contingency10. About 84.2% of the county is at a slope of 15% or less, while 15.2% is wooded; those countywide figures do not replace a parcel survey or site visit2526. Check flood maps and state permit jurisdiction before buying near a stream because qualifying floodway work requires state review27. A land division into 2 or more parts generally requires a survey and subdivision plat when any resulting part is under 5 acres, subject to statutory exceptions and possible supplemental county standards28. Scott County averages 39.2 inches of precipitation annually, and severe drought occurs in 2.2% of years2930. The effective property-tax rate is about 1.4%, the median annual bill is about $1,406, and the typical home value is about $89,662313233.
Watch-outs
Sources
- Scott County, Illinois - Official Website (2026 county census)
- Scott County, Illinois - Official Website (2026 county census)
- Boards and Committees - City of Winchester, IL, quoted and re-checked
- Scott County Health Department - Environmental Health (2026 county census)
- 77 Ill. Adm. Code 905.190 Installation Approval, quoted and re-checked
- 77 Ill. Adm. Code 905.190 Installation Approval, quoted and re-checked
- Campground Licensing and Recreational Area Act, quoted and re-checked
- Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
- Highway Permits, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Illinois Codes FAQ (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
- Building Codes and Regulations, quoted and re-checked
- Building Codes and Regulations, quoted and re-checked
- Scott County Health Department, Environmental Health (scottchd.com)
- 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
- 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
- 77 Ill. Adm. Code 905.30 Approved Private Sewage Disposal Systems, quoted and re-checked
- Private Sewage Disposal, quoted and re-checked
- 210 ILCS 95/2, Campground Licensing and Recreational Area Act definitions, quoted and re-checked
- 35 ILCS 517/5, Manufactured Home Installation Act, quoted and re-checked
- (2026 county census)
- Permit Program, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Permit Program, quoted and re-checked
- Illinois General Assembly — Plat Act, 765 ILCS 205/1, quoted and re-checked
- Annual precipitation: Bolthole Index county data
- Share of years in severe drought: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
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.