Unincorporated Menard County, Illinois requires a county building permit, and the Zoning Office administers the permit process1. County zoning also applies in unincorporated areas and villages without their own ordinances, while Athens, Greenview and Petersburg handle their own municipal rules2. A private septic system requires approval through the Menard County Health Department3.
At a glance
- Building permit
- Required in unincorporated Menard County1
- Zoning
- County-administered in unincorporated areas and villages without their own ordinances2
- Septic permit
- Required; handled through the Menard County Health Department34
- RV living
- Not confirmed; ask the Zoning Office about the parcel and proposed occupancy5
- Tiny home
- No complete county occupancy rule confirmed; zoning and permit review still apply15
- Owner-builder
- No general exemption confirmed; ask the Zoning Office before starting work6
- Private well
- A permit is required before construction, modification or sealing7
Who to call
Zoning
Building and zoning applications, subdivision review, and county flood-prevention questions
101 East Jefferson, Menard County Courthouse Annex, Petersburg, Illinois 62675
Septic permits
Menard County Health Department
Local contact for private sewage disposal and potable-water services
One Centre Drive, Petersburg, Illinois 62675
Roads & driveways
Menard County Highway Department
County-highway questions and entrance-culvert permits; road-district contacts for district roads
15620 Chautauqua Road, Petersburg, Illinois 62675
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 Menard County, Illinois?
Yes. Menard County's Zoning Office issues a building permit for construction in the county's unincorporated areas1. Start with that office before site work or construction because the published process can require consultation about zoning, floodplain, subdivision, road-district, well and septic requirements8. If a well and septic permit is required, the county will not issue the zoning permit until the Zoning Office receives a copy8. The process also calls for a certificate of completion and conformance before occupancy8. Illinois does not issue building permits or perform building-code inspections for privately funded construction; those administrative questions belong to the applicable local government910. Illinois has statewide baseline building-code requirements, but we could not confirm whether Menard County has adopted a separate model-code edition, so ask the Zoning Office what construction standard and inspections apply to the project1112.
Who handles building permits and zoning in Menard County?
The Menard County Zoning Office is the practical building-permit and zoning contact for unincorporated property112. The office is at 101 East Jefferson, Menard County Courthouse Annex, Petersburg, Illinois 62675; call (217)632-5123 or email [email protected]12. The office administers the county zoning and subdivision ordinances and publishes the building-permit application12. Ask for the parcel's zoning district, allowed use, setbacks, height limits, application requirements, fees and inspection schedule before finalizing plans51314. If a land division or property split is part of the project, consult the Zoning Office before applying because the subdivision ordinance may apply15. Property inside Athens, Greenview or Petersburg is outside the county office's ordinance administration, so contact the appropriate city instead16.
Does Menard County have zoning?
Yes. Menard County administers zoning in unincorporated areas and in villages that do not have their own ordinances2. The county does not administer the ordinances of Athens, Greenview or Petersburg, so a municipal parcel needs an answer from that city16. For county-regulated land, the zoning district matters: Illinois county zoning authority allows district-specific setback lines and building-height rules rather than one universal measurement1314. We could not confirm one countywide rule for minimum dwelling size, accessory dwellings, lot coverage or short-term rentals. Ask the Zoning Office to check the exact parcel, proposed dwelling type and every planned accessory use before purchase or design12. A property split also deserves early review because the county subdivision ordinance may control the application15.
How do septic permits work in Menard County?
Private sewage disposal is handled locally through the Menard County Health Department under its public-health service arrangement with Sangamon County317. The county page provides an application for a private sewage-disposal installation; contact the local office at One Centre Drive, Petersburg, Illinois 62675 or (217)535-310217. Illinois requires plan approval from the state or applicable local authority before construction of a new private system begins4. Septic feasibility should be settled early because only about 22.4% of Menard County soils are rated without severe limitations for a conventional drain field18. That countywide soil statistic does not decide an individual lot, so arrange the site-specific work requested by the health authority before locating the house. We could not confirm the county's inspection timing from the available county information; ask the Health Department when inspections must occur and what must remain uncovered17.
Can you live in an RV or tiny home on your land in Menard County?
We could not confirm a Menard County rule that broadly allows long-term RV occupancy or establishes complete occupancy standards for tiny homes on private land. Menard County zoning applies in unincorporated areas and in villages without their own ordinances, so ask the Zoning Office whether the proposed use is allowed in the parcel's district and what permit, setback and sanitation requirements apply212. Illinois campground licensing rules cover qualifying campgrounds; they do not answer whether one household may live in an RV on its own parcel19. A manufactured home can be occupied as a dwelling when state installation requirements are met, but local zoning, building, floodplain and utility rules may still apply20. Off-grid sanitation options recognized by Illinois do not eliminate the need for an approved system for other domestic wastewater21.
Building a home in Menard County: the steps, in order
- Confirm whether the parcel is unincorporated or inside a municipality; Menard County administers zoning outside Athens, Greenview and Petersburg and in villages without their own ordinances16.
- Ask the Zoning Office to confirm the district, residential use, setbacks, height rules, floodplain status and whether a property split triggers subdivision review1215.
- Apply for private-sewage approval through the Menard County Health Department and resolve site suitability before fixing the house location317.
- Obtain approval before constructing, modifying or sealing a private well7.
- Confirm driveway authority: use the Highway Department for a county highway and the appropriate road commissioner for a road-district road22. A state-highway driveway requires an IDOT permit before work23.
- Submit the county permit materials; required well and septic documentation must reach the Zoning Office before permit issuance when those permits apply8.
- Ask which inspections apply and return the certificate of completion and conformance before occupancy8.
What should you check before buying land in Menard County?
Check zoning jurisdiction first because Menard County administers unincorporated land and some villages, while Athens, Greenview and Petersburg administer their own ordinances16. Confirm septic feasibility before choosing a building site: only about 22.4% of county soils are rated without severe limitations for a conventional drain field18. The land is broadly gentle, with about 95.6% at a slope of 15% or less, but parcel-level drainage and soil conditions still matter24. Ask the Zoning Office about mapped floodplain status and local development approval, and remember that regulated Illinois waterways, floodplains and wetlands may require state or federal authorization1225. Verify driveway authority with the Highway Department or road commissioner, depending on who maintains the road22. For carrying costs, the countywide effective property-tax rate is about 1.6% and the median annual property-tax bill is about $2,9362627.
Watch-outs
- Menard County requires the applicable well and septic permit copies before issuing its zoning permit, so resolve water and wastewater early8.
- Only about 22.4% of Menard County soils are rated without severe limits for a conventional septic drain field; confirm the actual homesite with the health authority1817.
- No general owner-builder exemption was confirmed, and the available county material does not establish a complete inspection schedule; ask the Zoning Office before doing your own work612.
Sources
- Menard County IL Zoning (2026 county census)
- Menard County Zoning, quoted and re-checked
- Menard County IL Health Department (2026 county census)
- 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
- Menard County Zoning (2026 county census)
- (2026 county census)
- 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
- Menard County Zoning Permit Application, quoted and re-checked
- Illinois Codes FAQ (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
- Menard County Zoning Office (menardcountyil.gov)
- 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
- Menard County Zoning, quoted and re-checked
- Menard County Zoning, quoted and re-checked
- Menard County Health Department (menardcountyil.gov)
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
- Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
- 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
- Menard County Highway Department (menardcountyil.gov)
- Highway Permits (Illinois statewide rule), quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Permit Application and Instructions (Illinois statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
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.