Marshall County Zoning publishes a building-permit application for unincorporated Marshall County, Illinois; ask the office which projects require one1. Marshall County has county zoning and publishes township maps to identify parcel districts234. The Bureau, Putnam & Marshall Health Department issues private septic permits and permits for private-well construction or modification56.
At a glance
- Building permit
- Application published; confirm whether the proposed work requires one1
- Zoning
- Yes — township maps and the county GIS identify parcel districts24
- Septic permits
- Bureau, Putnam & Marshall Health Department5
- RV or tiny-home living
- Not confirmed; ask County Zoning about the parcel and proposed use78
- Owner-builder exemption
- A limited plumbing exemption applies; no general construction exemption confirmed910
- Setbacks and height
- Depend on the applicable zoning district1112
- Private well
- Health department permit required before construction or modification6
Who to call
Building permits
Building-permit applications, county zoning administration, variances, special uses and amendments
rgiacometti@marshallcountyillinois.gov
552 State Route 26, Lacon, Illinois 61540
Septic permits
Bureau, Putnam & Marshall Health Department — Sewage Program
Private sewage disposal plan review, permits, pre-use inspections and complaints
Roads & driveways
Marshall County Highway Department
Permits for entrances and other work in county right-of-way
ejunker@marshallcountyillinois.gov
552 State Route 26, Lacon, Illinois 61540
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 Marshall 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.
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Do you need a building permit in Marshall County, Illinois?
Marshall County Zoning publishes a building-permit application for unincorporated Marshall County, but the published application information does not state which projects require the permit; ask the office about the proposed work before construction1. Illinois does not issue building permits for privately funded construction; local government handles any permit requirement13. Illinois has required statewide baseline building codes since January 1, 2025, and locally adopted codes must comply with that framework14. Marshall County's specific code adoption, required plan documents, inspection stages and certificate-of-occupancy rules could not be confirmed, so ask County Zoning for the checklist that applies to the proposed project15.
Who issues Marshall County building permits, and how do you reach the office?
Marshall County Zoning is the first stop for building-permit and land-use questions in unincorporated Marshall County, and the county publishes applications for building permits, amendments, special uses and variances16. The office is at 552 State Route 26 in Lacon, and it can be reached at 309-246-6401 or rgiacometti@marshallcountyillinois.gov7. Matters that cannot be processed administratively go to the Zoning Board of Appeals, so applicants should ask staff about the next meeting and its filing deadline1. We could not confirm county building-permit fees or inspection and occupancy requirements; ask County Zoning for the current project checklist7. Inside Wenona, the city building inspector handles building permits before construction, alteration, repair, removal or demolition17. Wenona also requires a city septic permit; state and county health requirements still apply18.
Does Marshall County have zoning?
Marshall County administers county zoning and publishes its zoning ordinance; the county guidance here concerns unincorporated land2319. County township maps and the GIS parcel details identify zoning districts, but maps may omit recent updates, so confirm the district with Marshall County Zoning420. Setbacks and height limits depend on the district; ask County Zoning for lot-size, dwelling-size and lot-coverage requirements11127. Toluca and Wenona administer their own zoning2122. Private septic systems remain subject to the regional health department's program, and Wenona also requires a city septic permit518. Washburn, mainly in Woodford County but extending into Marshall County, has village zoning; IDPH regulates private septic systems, and the local health agency serving a Washburn parcel should be confirmed with IDPH2324.
How do septic permits work in Marshall County?
The Bureau, Putnam & Marshall Health Department administers Marshall County's private sewage-disposal program under Illinois requirements and the county sewage ordinance5. The health department reviews plans and issues the septic permit before construction25. It also offers consultations before construction and inspects the system before use26. Only 14.6 percent of Marshall County soils are rated without severe limits for a conventional septic drain field, so make septic feasibility an early purchase contingency27. Ask the health department what site information and plans it needs and when to schedule the pre-use inspection28.
Can you live in an RV or tiny home on land in Marshall County?
We could not confirm a rule allowing long-term residential RV or tiny-home occupancy on a private parcel in unincorporated Marshall County; ask Marshall County Zoning about the proposed use7. County zoning still applies, so give Marshall County Zoning the parcel number and describe the proposed dwelling and duration before buying or moving a unit onto the land87. Illinois requires annual state inspection and licensing for qualifying campgrounds, including facilities meeting the state threshold for shelters, capacity and camping days; that campground rule does not grant permission to occupy an RV as a residence on a private lot29. Manufactured homes have a separate statewide framework: installation may be performed by an Illinois-licensed installer or the homeowner and must follow the manufacturer's instructions or the state installation code, while local zoning, building and floodplain requirements may still apply30.
What are the steps to build a home in Marshall County?
- Use the township maps and county GIS to identify the parcel's zoning district, then ask Marshall County Zoning to confirm the current district and applicable use, setback and height rules411.
- If the project divides land, ask County Zoning how the subdivision ordinance applies because its thresholds and exemptions could not be confirmed31.
- If the site needs septic, obtain plan approval and a permit from the Bureau, Putnam & Marshall Health Department before system construction525.
- For private-well construction or modification, obtain the regional health department’s permit and use an Illinois-licensed well contractor6.
- Ask Marshall County Zoning whether the proposed work requires a building permit and which plans, fees and inspections apply; the office publishes the application1.
- Ask County Zoning whether the proposal needs administrative approval or Zoning Board of Appeals review, and confirm the filing deadline1.
- For an entrance on a county highway, submit the location to the Highway Department for approval; the county installs an approved entrance and bills the landowner for materials32.
- Arrange the health department's required septic inspection before using the system2826.
What should you check before buying land in Marshall County?
Before buying unincorporated Marshall County land, confirm the zoning district with County Zoning and ask how any planned land division falls under the subdivision ordinance; its thresholds and exemptions could not be confirmed431. Only 14.6 percent of county soils are rated without severe limits for a conventional drain field, so obtain a site-specific septic evaluation early27. The Bureau, Putnam & Marshall Health Department requires a permit before private-well construction or modification and inspects new or renovated wells; separate permits cover abandoned-well sealing and closed-loop geothermal wells6. The Highway Department inspects proposed county-highway entrances, installs approved entrances and bills landowners for materials; state-road access follows the IDOT driveway-permit process3233. We could not confirm county floodplain-development requirements or agricultural construction exemptions; ask Marshall County Zoning before treating a flood-prone parcel or farm building as exempt7.
Watch-outs
- Long-term RV living and tiny-home occupancy were not confirmed; ask Marshall County Zoning about the specific parcel and proposed use before purchase87.
- A proposed county-highway entrance is subject to Highway Department inspection and approval, while a state-road entrance follows a separate IDOT permit process3233.
- Only 14.6 percent of Marshall County soils are rated without severe limits for a conventional septic drain field, so obtain a site-specific evaluation early27.
Sources
- Zoning - Marshall County Government, quoted and re-checked
- Zoning - Marshall County Government, quoted and re-checked
- Zoning - Marshall County Government, quoted and re-checked
- Mapping - Marshall County Government, quoted and re-checked
- Sewage Program - Bureau, Putnam & Marshall Health Department, quoted and re-checked
- Water Program - Bureau, Putnam & Marshall Health Department, quoted and re-checked
- Marshall County Zoning (marshallcountyillinois.gov)
- Zoning - Marshall County Government (2026 county census)
- HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
- 225 ILCS 320/18 — Local regulation; Department standards (Illinois statewide rule), quoted and re-checked
- ilga.gov (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
- Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
- Building Codes and Regulations (Illinois statewide rule), quoted and re-checked
- Building Codes and Regulations, quoted and re-checked
- Zoning - Marshall County Government, quoted and re-checked
- Wenona: 3-2A-1: Zoning Permits (Marshall County), quoted and re-checked
- Wenona: 8-5-3: Private Sewage Disposal (Marshall County), quoted and re-checked
- Zoning - Marshall County Government, quoted and re-checked
- Mapping - Marshall County Government, quoted and re-checked
- Toluca: Title 9 Zoning Regulations (Marshall County), quoted and re-checked
- Wenona: 3-3-1: Districts Established (Marshall County), quoted and re-checked
- Village of Washburn: official source (Marshall County), quoted and re-checked
- Village of Washburn: Private Sewage Disposal (Marshall County), quoted and re-checked
- Sewage Program, quoted and re-checked
- Bureau, Putnam & Marshall Health Department — Sewage Program (bpmhd.org)
- 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
- Sewage Program, quoted and re-checked
- Youth Camps and Campgrounds, quoted and re-checked
- Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
- Zoning - Marshall County Government, quoted and re-checked
- Policies - Marshall County Government, quoted and re-checked
- Highway Permits (Illinois statewide rule), 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.