Bolthole Index

Putnam County, Illinois

Building permits, zoning and land rules in Putnam County, Illinois

55Index Score / 100
#63 of 102 in Illinois

Unincorporated Putnam County, Illinois requires a building permit for regulated construction, with a septic permit obtained first1. Putnam County administers zoning for unincorporated land; Granville and Mark have their own building permits and zoning23456. The Bureau, Putnam & Marshall County Health Department handles local septic permits and inspections before use under Illinois state regulation78.

At a glance

Building permit
Required for regulated construction; obtain the septic permit first and submit the application with a survey plat and blueprints1
Building code
An International Code Council code dated 2009 is adopted; the specific model code is not identified9
Zoning
County zoning applies to unincorporated land; Granville and Mark have village zoning246
Septic permits
The tri-county health department reviews plans, issues the local permit and inspects systems before use108
Owner-installed septic
Allowed on an owner-occupied property when all requirements are met11
RV or tiny-home living
County rules could not be confirmed; ask the Zoning & Floodplain Office before relying on either use12
Private well
A state or approved local health-department permit is required before construction, deepening, modification or sealing13
Septic soils
Only 21.1% of county soils lack severe limits for a conventional drain field14

Who to call

Zoning

Putnam County Zoning & Floodplain Office

County building permits, zoning administration and floodplain questions

815-925-9270

120 N Fourth St, Hennepin, Illinois 61326

Online permits →

Health department

Bureau, Putnam & Marshall County Health Department

Private sewage disposal permits, plan review and inspection for Putnam County

815-872-5091

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

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Do you need a building permit in Putnam County, Illinois?

Unincorporated Putnam County requires a building permit for construction regulated by its Building and Zoning Procedure1. A septic permit must come first; the building-permit application must include a survey plat and blueprints, and the applicant must contact the zoning officer to arrange issuance1. Putnam County uses an International Code Council code dated 2009 and inspects new buildings, but we could not confirm the specific model code15. The county procedure calls for inspections at staking, basement and footing preparation, before drywall, and before occupancy1. Illinois does not issue building permits or conduct building-code inspections for privately funded construction; those matters go to the local government with jurisdiction1617.

Who handles Putnam County building permits, and how do you reach the office?

Start with the Putnam County Zoning & Floodplain Office at 120 N Fourth St, Hennepin, Illinois 61326, or call 815-925-9270 for county building permits18. The county publishes a building-permit application and Building and Zoning Procedure; submit a survey plat and blueprints and arrange issuance with the zoning officer after obtaining the septic permit191. Putnam County charges a non-refundable application fee, payable with the application, of at least $25 or the applicable square-footage calculation, whichever is greater; ask the office for the calculation for your project20. Inside Granville and Mark, the village zoning officer issues building permits35. Private sewage disposal plan review, septic permits and inspections remain with the Bureau, Putnam & Marshall County Health Department10. Ask the building-permit office whether a separate occupancy certificate is required.

Does Putnam County have zoning?

Putnam County administers zoning for unincorporated land through the Zoning & Floodplain Office218. Inside Granville and Mark, village zoning applies, while local septic permits remain with the Bureau, Putnam & Marshall County Health Department4610. Setbacks and building-height limits are district-specific rather than one statewide measurement, so the parcel's zoning district must be identified before a site plan is finalized2122. We could not confirm county rules for minimum dwelling size, minimum lot size, lot coverage, accessory dwellings, long-term RV occupancy or tiny homes. Ask the Zoning & Floodplain Office for the parcel's district and the current standards that apply to the intended use18. Manufactured homes may be occupied as dwellings under Illinois rules when properly installed, but local zoning, building, floodplain and utility requirements still apply23. A proposed split of land also deserves an early county review because Putnam County has a subdivision ordinance, while we could not confirm its current standards24.

Who handles septic permits and inspections in Putnam County?

The Bureau, Putnam & Marshall County Health Department reviews plans and issues local septic permits for Putnam County; IDPH retains statewide regulatory authority725. Submit drawings, specifications and requested information for review before construction; installation approval is required before a new system is installed26. Before applying, the department says a Certified Soil Classifier or Illinois Licensed Professional Engineer must determine the site's soil absorption capacity11. Putnam County septic systems must be inspected by the health department before use; give 48 hours' notice before work so the final construction inspection can occur before backfilling811. A state-licensed, county-registered installer normally performs the work, but an owner may do the work on an owner-occupied property when all requirements are met11. Test feasibility early: only 21.1% of Putnam County soils lack severe limits for a conventional drain field14.

Can you live in an RV or tiny home on land in Putnam County?

We could not confirm a Putnam County rule that allows or prohibits long-term RV living, temporary private-land camping or tiny-home occupancy. Putnam County has county zoning, so ask the Zoning & Floodplain Office how the parcel's district treats the proposed dwelling, temporary occupancy and utility setup before buying or moving a unit onto the site1218. Illinois campground rules address qualifying campgrounds and temporary RV parking, not the separate question of living in an RV on one's own parcel27. Illinois allows manufactured homes as dwellings when installation requirements are met, including installation by a licensed installer or the homeowner according to manufacturer instructions, while local zoning, building, floodplain and utility requirements remain applicable23. Illinois also recognizes specified privies, portable toilets, recirculation toilets, incinerator toilets and compost toilets for human waste, but other domestic waste still requires a conventional private sewage disposal system28.

What are the steps to build a home in Putnam County?

  1. Ask the Putnam County Zoning & Floodplain Office to identify the parcel's zoning district, setbacks, allowed dwelling type and floodplain status218.
  1. If the land will be divided, ask whether the county subdivision ordinance applies before designing or recording lots24.
  1. Arrange the soil assessment, then submit septic drawings and specifications to the Bureau, Putnam & Marshall County Health Department and obtain installation approval before construction112629.
  1. After receiving the septic permit, submit the county building-permit application with a survey plat and blueprints and contact the zoning officer to arrange issuance1.
  1. Pay the non-refundable building-permit application fee when submitting the application and schedule county inspections at staking, basement and footing preparation, before drywall, and before occupancy201.
  1. Obtain a state or approved local health-department permit before constructing, deepening, modifying or sealing a private well13.
  1. Obtain an IDOT permit before work in a state-maintained highway right-of-way30.
  1. Give the health department 48 hours' notice before septic work so it can schedule the final inspection before backfilling11.

What should you check before buying land in Putnam County?

Confirm zoning and legal access first: Putnam County has zoning and a subdivision ordinance, while the Zoning & Floodplain Office can confirm parcel standards and current subdivision requirements1224. Check flood status before designing a building pad because regulated Illinois floodway construction requires approval, with applicability depending on stream drainage area and location31. Test septic feasibility early because only 21.1% of county soils lack severe limits for conventional drain fields14. A private well requires a permit before construction, deepening, modification or sealing, and the application must address separation from septic components and other contamination sources13. Putnam County's effective property-tax rate is about 1.6%, and the median annual property-tax bill is about $2,6683233. The county is lightly populated at about 34.7 people per square mile, and 91.9% of its land has a slope of 15% or less3435.

Watch-outs

  • Putnam County requires the septic permit before it will issue the building permit, so settle the system design and approval before finalizing the construction schedule1.
  • Only 21.1% of Putnam County soils lack severe limits for a conventional septic drain field, so obtain the soil assessment before committing to a building site1411.
  • Putnam County's RV, tiny-home, minimum-size and lot-coverage rules could not be confirmed; ask the Zoning & Floodplain Office about the parcel's district and intended use1218.

Sources

  1. Putnam County Building and Zoning Procedure, quoted and re-checked
  2. Putnam County Risk Assessment, quoted and re-checked
  3. Village of Granville: Building Permits and Certificates of Occupancy (Putnam County), quoted and re-checked
  4. Village of Granville: Village of Granville, IL Code (Putnam County), quoted and re-checked
  5. Village of Mark: Sec. 26-246 — Building permit—Required (Putnam County), quoted and re-checked
  6. Village of Mark: Village of Mark, Illinois (Putnam County), quoted and re-checked
  7. Sewage Program | Bureau, Putnam & Marshall Health Dept, quoted and re-checked
  8. Sewage Program | Bureau, Putnam & Marshall Health Dept, quoted and re-checked
  9. Putnam County Risk Assessment, quoted and re-checked
  10. Sewage Program, quoted and re-checked
  11. Bureau, Putnam & Marshall County Health Department (bpmhd.org)
  12. Putnam County Risk Assessment (2026 county census)
  13. Illinois Water Well Construction Code, quoted and re-checked
  14. 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
  15. Putnam County Risk Assessment - Draft, quoted and re-checked
  16. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  17. Illinois Codes FAQ (Illinois statewide rule), quoted and re-checked
  18. Putnam County Zoning & Floodplain Office (putnamil.gov)
  19. Putnam County Zoning Ordinance and Building Permit documents, quoted and re-checked
  20. Putnam County Zoning Ordinance Updated Sept. 16, 2024, quoted and re-checked
  21. ilga.gov (Illinois statewide rule), quoted and re-checked
  22. 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
  23. Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
  24. Putnam County Risk Assessment, quoted and re-checked
  25. Private Sewage Disposal, quoted and re-checked
  26. Private Sewage Disposal, quoted and re-checked
  27. Youth Camps and Campgrounds (Illinois statewide rule), quoted and re-checked
  28. 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
  29. Sewage Program, quoted and re-checked
  30. Highway Permits (Illinois statewide rule), quoted and re-checked
  31. Permit Program (Illinois statewide rule), quoted and re-checked
  32. Effective property tax rate: Bolthole Index county data
  33. Median property tax bill: Bolthole Index county data
  34. Population density: Bolthole Index county data
  35. Share of land at 15% slope or less: Bolthole Index county data

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.

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Compared with neighboring counties

Like all 6 of its neighbors, Putnam County has countywide zoning.

RulePutnam CountyMarshall CountyBureau CountyLaSalle CountyStark CountyWoodford CountyLee County
Building permitRequiredRequiredRequiredRequiredRequiredLimitedRequired
County zoningYesYesYesYesYesYesYes
Septic permitsBureauBureauCounty Health Dept.County Health Dept.Henry & Stark County Health Dept.County Health Dept.County Health Dept.

County locator

Putnam County in Illinois

55
County map
Putnam County highlighted among the Illinois counties · colored by Index score

How Putnam County scores

Seclusion35100% ev.
Self-Sufficiency59100% ev.
Admin Boringness4590% ev.
Durability58100% ev.
Property Autonomy42100% ev.
Carry Cost55100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$188kTypical home
1.6%Property tax
$9,797Land / acre
37.1"Annual rain
3% of yrsSevere drought
6.8 / yr (+6.4)Mid-century 100°F days
14.6 daysMid-century dry spell
1.73" (+5.9%)Mid-century 1-day rain
1.79×Wildfire change factor
100%Forward climate coverage
$1,498Home insurance / yr
3.2% / yrInsurance growth
0.89%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
50,967People within 30 min
9,736,629People within 2 hr
26,125Radius comparison (15 mi)
34.7People / sq mi
0%Federal land
91.9%Land at 15% slope or less
21.1%Soils rated "not limited" for septic (strict USDA rating)
19,695 acWorkable land screen
21.4%Wooded land
34.8 tonsBiomass / forest ac
50.7°FAvg temp

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Cities and towns in Putnam County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Granville Township · Hennepin Township · Village of Hennepin · Magnolia Township · Village of Magnolia · Village of McNabb · Senachwine Township · Village of Standard

Answers from the rulebook for Putnam County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Putnam County rules

  • Building permitRequired

    Building permits for construction regulated by the Putnam County Building and Zoning Procedure.

    • A septic permit must be obtained before a building permit will be issued.
    • The building permit application must be completed and the zoning officer contacted to arrange issuance.
    • A plat of survey and a set of blueprints must accompany the building permit application.
    • The procedure lists inspections when the building is staked out, when the basement and footings are prepared, before drywall installation, and prior to occupancy.
    “NO BUILDING PERMIT(S) WILL BE ISSUED UNTIL AFTER A SEPTIC PERMIT HAS BEEN OBTAINED.”
  • Building code adoptedAdopted (with conditions)

    Building-code regulation in Putnam County.

    • The county risk assessment identifies the code as an International Code Council code dated 2009; the source does not identify the specific ICC model-code edition.

    code family: International Code Council · code date: 2009 year

    “The county does have building codes in place. The code used in the International Code Council and the code is dated from 2009.”
  • InspectionsRequired

    All new buildings in Putnam County under the county's building-code administration.

    • The official risk assessment states that all new buildings are inspected.
    • The same source states that the building code used is the International Code Council code dated 2009.

    building code: International Code Council · code date: 2009

    “The county does have building codes in place. The code used in the International Code Council and the code is dated from 2009. All new buildings are inspected.”
  • County-wide zoningPresent

    Putnam County zoning regulation, including the county ordinance identified in the official county risk assessment.

    • The cited county risk assessment states the ordinance was adopted on May 9, 2016 and revised on February 13, 2018.
    • The source does not establish whether later amendments supersede or modify those dates.

    adoption date: May 9, 2016 · revision date: February 13, 2018

    “The county has a zoning ordinance that was adopted on May 9th, 2016 and revised on February 13th, 2018. The ordinance does address natural hazards.”
  • Who permits septicLocal

    Putnam County private sewage disposal permitting and inspections administered through the Bureau, Putnam & Marshall County Health Department.

    • The Illinois Department of Public Health retains statewide regulatory authority under the Illinois Private Sewage Disposal Code.
    “The health department reviews plans and issues permits of private sewage disposal systems. The health department is available for consultations prior to system construction. The health department conducts inspections of private sewage disposal systems prior to use.”
    One more reviewed finding on this topic
    • Local — Private sewage disposal systems in Putnam County administered by the Bureau, Putnam & Marshall County Health Departments.
      “The health department reviews plans and issues permits of private sewage disposal systems. The health department is available for consultations prior to system construction. The health department conducts inspections of private sewage disposal systems prior to use.”
  • Septic permitRequired

    Private sewage disposal systems in Putnam County served by the Bureau, Putnam & Marshall County Health Departments.

    • The health department reviews plans and issues permits before construction.
    • The health department conducts inspections before use.
    • The linked Putnam County Sewage Ordinance and Putnam County sewage-program fee schedule may impose additional local requirements; the exact permit exceptions, fees, validity period, owner-builder provisions, and variance conditions were not fully extractable from the opened PDF/page and require follow-up.
    “The health department reviews plans and issues permits of private sewage disposal systems. The health department is available for consultations prior to system construction. The health department conducts inspections of private sewage disposal systems prior to use.”
  • Septic inspectionRequired

    Private sewage disposal systems in Putnam County before use.

    • The health department conducts inspections prior to use.
    “The health department conducts inspections of private sewage disposal systems prior to use.”
  • Subdividing landRegulated (with conditions)

    Subdivision activity in Putnam County.

    • The source identifies a county subdivision ordinance adopted around 1968 but does not provide the ordinance text or current standards.

    adoption date: around 1968

    “The county has a subdivision ordinance that was adopted around 1968.”
  • Permit feesPublished (with conditions)

    Building permit fees charged under the Putnam County Zoning Ordinance.

    • A fee is charged for each building permit application and is paid when the application is submitted.
    • Fees are non-refundable.
    • The construction permit application fee is the greater of $25.00 or the applicable square-footage calculation.
    • The ordinance states the fee schedule applies to residential building or structure floor area above and below ground.

    minimum construction permit application fee: >= 25 USD (The fee is the greater of $25.00 or the applicable schedule calculation.) · residential above-ground living area fee: per 0.12 USD per square foot · residential below-ground basement fee: per 0.08 USD per square foot

    “The construction permit application fee shall be the greater of twenty-five dollars ($25.00) or:”
  • Permit processPublished (with conditions)

    County-published building permit materials for Putnam County.

    • The county document library publishes a building permit fee document, a building permit application, and a Building and Zoning Procedure.
    • The document-library listing does not itself state the full permit requirements, inspection sequence, or fees.
    “Putnam County Zoning Ordinance and Building Permit documents 4 documents”
    One more reviewed finding on this topic

Illinois rules that apply here

  • Owner-builder exemptionConditional

    Owner occupants or lessee occupants of single-family residences, and owners of single-family residences under construction for their own occupancy, performing plumbing planning, installation, alteration, or repair in Illinois.

    • The exemption is limited to plumbing work on the specified single-family residence; the cited statute does not establish a general owner-builder exemption for all construction trades or a statewide exemption from building permits.
    • The plumbing must comply with the minimum standards in the Illinois State Plumbing Code.
    • The plumbing is subject to inspection by the Illinois Department of Public Health or by the local governmental unit if it retains a licensed plumber as inspector.
    • The owner, owner occupant, or lessee occupant may not employ anyone other than a plumber licensed under the Illinois Plumbing License Law to assist.
    • An occupant must have taken possession of and be living in the premises as their bona fide sole and exclusive residence, or, for a residence under construction, expect to take possession and live there as that residence, with current intent to live there for at least 6 months after completion of the plumbing work or, for a residence under construction, at least 6 months after completion of construction.
    • Failure to possess and live in the premises as a sole and exclusive residence for 6 months or more creates a rebuttable presumption that the required intent was lacking.

    minimum occupancy period: >= 6 months (After completion of plumbing work; for a residence under construction, after completion of construction.)

    “Nothing herein contained shall prohibit the owner occupant or lessee occupant of a single family residence, or the owner of a single family residence under construction for his or her occupancy, from planning, installing, altering or repairing the plumbing system of such residence”
    2 more reviewed findings on this topic
    • Conditional — Privately funded construction in Illinois, including projects performed by an owner-builder, as to state-issued building permits, state plan review, state building-code inspections, and state occupancy permits.
      “No. If any of these are required, they would be addressed by the unit of local government.”
    • Conditional — Statewide treatment of local plumbing permits and inspections for qualifying owner occupants performing plumbing work on a single-family residence.
      “Nothing contained in this Act shall prohibit any city, town, village, township or county from providing for a Plumbing Inspector or from requiring permits for the installation and repair of plumbing and collecting a fee therefor, but a city, town, village, township, or county that requires a permit for installation and repair of plumbing may not issue that permit without verification that the applicant has a valid plumbing license or that the applicant is the owner occupant of a single family residence that is the subject of the permit.”
  • Certificate of occupancyLimited

    Occupancy permits or certificates for privately funded construction in Illinois.

    • The State does not issue occupancy permits for privately funded construction.
    • If an occupancy permit is required, it is addressed by the applicable unit of local government.
    “No. If any of these are required, they would be addressed by the unit of local government.”
    One more reviewed finding on this topic
    • Not required — Issuance of occupancy permits or certificates by the State of Illinois for privately funded construction.
      “No. If any of these are required, they would be addressed by the unit of local government.”
  • SetbacksDistrict specific (with conditions)

    County zoning regulations for building or setback lines outside municipalities with municipal zoning ordinances.

    • The actual setback distances are established by applicable county zoning districts or other local ordinances.
    • Agricultural buildings may be required to conform to building or setback lines.
    “to establish building or setback lines”
  • Building heightDistrict specific (with conditions)

    County zoning districts outside municipalities with municipal zoning ordinances.

    • The applicable county zoning ordinance determines the actual height limit by district or use.
    • No single statewide height measurement was identified.
    “including height of buildings and structures”
  • Manufactured homesAllowed (with conditions)

    Occupancy of manufactured homes as dwellings, including occupancy in manufactured home communities regulated by IDPH.

    • Manufactured home communities with 5 or more sites must be licensed by IDPH, except communities located in home rule units.
    • IDPH annually inspects licensed communities for renewal, including water, sewage disposal, electrical systems, lighting, roads, spacing of homes, and garbage disposal.
    • Manufactured homes moved since January 1, 1980 must be secured using equipment meeting IDPH standards.
    • Effective December 31, 2001, manufactured homes must be installed by an Illinois licensed manufactured home installer or the homeowner and installed according to manufacturer instructions; if unavailable, the IDPH Manufactured Home Installation Code applies.
    • Local zoning, building, floodplain, and utility requirements may also apply.

    manufactured home community license threshold: >= 5 sites (Communities located in home rule units are excepted from this IDPH licensing statement.) · moved-home tiedown requirement effective date: >= 1980-01-01 · installation requirement effective date: >= 2001-12-31

    “designed and situated so as to permit its occupancy as a dwelling place for one or more persons”
  • Off-grid sanitationAllowed (with conditions)

    Off-grid disposal of human wastes through privies, portable toilets, recirculation toilets, incinerator toilets, and compost toilets statewide in Illinois.

    • Other domestic wastes must be disposed of in a conventional private sewage disposal system.
    • Compost toilets may also be used for other organic domestic wastes.
    • Privies have construction, capacity, venting, maintenance, and abandonment requirements.
    • A privy pit must have a minimum capacity of 50 cubic feet per seat.
    • A privy must be pumped when filled to within 18 inches of the bottom of the riser.
    • Vault privies are required where groundwater or limestone formations are within 4 feet of the bottom of the pit.
    • Recirculating toilets must meet NSF International/ANSI Standard 41 and residuals must go to an approved public or private sewage disposal system.
    • Incinerator and compost toilets have separate maintenance and disposal requirements; compost toilets must meet NSF International/ANSI Standard 41.

    privy pit minimum capacity: >= 50 cubic feet per seat · privy pumping trigger: <= 18 inches from bottom of riser (Pump when filled to within this distance.) · vault-privy groundwater or limestone separation: < 4 feet from bottom of pit (Watertight, non-metal vaults are required where the condition applies.)

    “Privies, portable toilets, recirculation toilets, incinerator toilets and compost toilets are approved for private sewage disposal of human wastes.”
  • Well permitRequired

    Construction of a new water well, modification of an existing water well, or sealing of an abandoned water well in Illinois.

    • A permit must be obtained from the Illinois Department of Public Health or an approved local health department before work begins.
    • The application must use Department or approved local health department forms and include a plan and drawing of the proposed construction.
    • The plan must include the lot size, slope, property lines, distances to septic tanks, abandoned wells, property lines, seepage fields, sewers, and other contamination sources; driller license number and name; estimated daily pumping capacity if greater than 100,000 gallons per day; well location; owner name and address; well type; estimated depth; well-use type; and proposed aquifer.
    • The permit is void if construction has not commenced within one year after issuance.
    • The permit fee for constructing, deepening, modifying, or sealing a water well may not exceed $100.
    • The Department will deny a permit request when available information indicates groundwater contamination exceeds Class I groundwater standards, subject to the treatment approval provision in subsection (f)(2).
    • The permittee must notify the Department, approved local health department, or approved unit of local government by telephone or in writing at least two days before work begins.

    maximum water well permit fee: <= 100 USD · permit commencement deadline: 1 year after issuance (Permit is void if construction has not commenced within that period.) · pre-work notification: >= 2 days (Notification may be by telephone or in writing.)

    “A permit to construct a new water well, modify an existing water well or seal an abandoned water well shall be obtained from the Department or approved local health department prior to start of work.”
    One more reviewed finding on this topic
    • Required — Construction, deepening, modification, or sealing of water wells in Putnam County under Illinois statewide rules.
      “A permit to construct, deepen, modify or seal a water well shall be obtained from the Department or approved local health department prior to start of work.”
  • Driveway accessRequired

    Work within the right-of-way of an Interstate, U.S. state route, Illinois state route, or state-maintained roadway, including access-driveway requests to State highways.

    • A permit must be obtained before work begins.
    • Requirements may vary by IDOT district; the applicant must contact the district office for specific requirements.
    • IDOT's access-driveway handbook guides what is allowable for highway access requests.
    “Per 605 ILCS 5/4 209, IDOT requires a permit when working within the right-of-way of an Interstate, U.S. state route, Illinois state route, or state maintained roadway. A permit must be obtained prior to the start of any work and a copy of the approved permit must be at the worksite at all times.”
  • Building in a floodplainRequired

    Construction activities in regulated Illinois floodways and, where a floodway has not been delineated, generally work anywhere in the floodplain.

    • For downstate streams, IDNR Division permitting applies to floodways of streams draining at least one square mile in urban areas or ten square miles in rural areas.
    • In northeastern Illinois, Part 3708 applies to identified floodways in Cook County excluding Chicago, DuPage, Kane, Lake, McHenry, and Will Counties.
    • Some minor activities are automatically authorized by statewide or regional permits if their terms and conditions are met.
    • For State-owned property, Part 3710 requires a permit for all development activity in FEMA-mapped floodplains.

    urban stream drainage area threshold: >= 1 square mile (regulated floodways under Part 3700) · rural stream drainage area threshold: >= 10 square miles (regulated floodways under Part 3700)

    “All construction activities in the floodways of streams (the channel and the adjacent portion of the floodplain that is needed to safely convey and store flood waters) in urban areas where the stream drainage area is one square mile or more or in rural areas where the stream drainage area is ten square miles or more must be permitted by the Division prior to construction.”
  • Short-term rentalsLimited

    Short-term rentals in Illinois where at least one room is rented for fewer than 30 consecutive days and accommodations are reserved in advance, when the hosting platform meets the statutory definition of a re-renter.

    • Beginning July 1, 2025, qualifying hosting platforms are subject to Hotel Operators’ Occupation Tax.
    • The source establishes tax and registration obligations, not statewide land-use permission; local zoning and licensing may separately apply.

    rental period: < 30 consecutive days

    “Beginning July 1, 2025, hosting platforms for short-term rentals that meet the definition of “re-renter” are subject to Hotel Operators’ Occupation Tax.”
  • Campground & park staysAllowed (with conditions)

    Overnight camping in Illinois campgrounds subject to the Campground Licensing and Recreational Area Act.

    • IDPH annually inspects and licenses campgrounds in Illinois.
    • The state campground definition includes camping and temporary parking of recreational vehicles.
    • Campgrounds within home rule units of government are exempt from the state campground licensing requirement.
    • Recreational areas without overnight camping, such as highway rest stops and picnicking areas, are subject to the rules but are not licensed or routinely inspected.

    minimum persons for statutory campground threshold: >= 10 persons · minimum camping duration for statutory campground threshold: >= 6 camping days per calendar year

    ““Camping Day” means any 24 hour period or portion thereof during which the participants remain overnight at the site.”
  • county building authorityLimited

    County building-construction and building-code regulation, including residential structures, in counties meeting the statutory population and metropolitan-area conditions.

    • The county must have a population not in excess of 1,000,000.
    • The county must be located in the area served by the Northeastern Illinois Metropolitan Area Planning Commission.
    • Rules are subject to rules or regulations adopted by the State Fire Marshal under the cited gasoline and volatile-oils statute.
    • The county must exempt municipalities located wholly or partly within the county when the municipal building code is equal to the county regulation and local authorities are enforcing that municipal code.
    • The rules apply throughout the county, but municipalities may establish higher standards.
    • The rules do not apply to construction or alteration of buildings or structures used or to be used for agricultural purposes on a tract zoned and used for agricultural purposes.
    • The county board must follow the publication and posting requirements in 55 ILCS 5/5-1063.
    • Beginning on the effective date of the amendatory Act of the 92nd General Assembly, a county adopting a new building code or amending an existing building code must provide the building-code identification to the Capital Development Board under Section 10.18 at least 30 days before adoption.
    • Violations are petty offenses, and enforcement is by an officer designated by county-board resolution.
    • The provision expressly authorizes county building-construction and building-code rules, but the opened text does not expressly use the phrase residential building permit requirement.

    population threshold: <= 1000000 persons (The county must be located in the area served by the Northeastern Illinois Metropolitan Area Planning Commission.) · pre-adoption identification period: >= 30 days (Applies to a new building code or amendment under the stated amendatory-Act provision.)

    “The county board in any county with a population not in excess of 1,000,000 located in the area served by the Northeastern Illinois Metropolitan Area Planning Commission may prescribe by resolution or ordinance reasonable rules and regulations (a) governing the construction and alteration of all buildings and structures and parts and appurtenances thereof and governing the maintenance thereof in a condition reasonably safe from the hazards of fire, explosion, collapse, contagion and the spread of infectious disease”
    One more reviewed finding on this topic
    • General — Illinois counties adopting and enforcing building codes and issuing building permits for residential construction in unincorporated areas, subject to the statewide baseline framework.
      “A municipality or county is not required to adopt building codes. If they do NOT adopt a building code then they are considered a non-building code jurisdiction and section 10.09-1 of the Capital Development Board Act (20 ILCS 3105) applies. If they do adopt a building code(s) then it must comply with section 10.18 of the Capital Development Board Act (20 ILCS 3105).”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Local zoning — Whether zoning varies among Putnam County unincorporated areas and incorporated municipalities, and which local authorities administer those rules.
  • Zoning districts — County zoning-district classifications and any district map or dimensional schedule.
  • Minimum dwelling size — Minimum dwelling-size rules in Putnam County.
  • Minimum lot size — Minimum lot-size rules in Putnam County.
  • Lot coverage — Lot-coverage rules in Putnam County.
6 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Mandatory utility hookup
  • Agricultural exemption

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Putnam County, Illinois

Is Putnam County a good place to live off-grid or homestead?

Putnam County scores 55/100 on the Bolthole Index, a solid county profile. Its strengths: workable self-sufficiency basics (37.1″/yr rainfall) and elevated current hazard exposure. Watch-outs: about 50,967 people within a 30-minute drive.

Do you need a building permit in Putnam County, Illinois?

Putnam County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Bureau, Putnam & Marshall County Health Department (agent of IDPH). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Putnam County, Illinois?

Land in Putnam County runs about $9,797 per acre, based on the latest county data.

What is the water situation in Putnam County?

Putnam County gets about 37.1" of rain a year, with severe drought in roughly 3% of years.

How remote is Putnam County?

A representative private-land location has about 50,967 people within a 30-minute drive and 9,736,629 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Putnam compares in Illinois

Compare side-by-side →See all 102 Illinois counties ranked →