Bolthole Index

Rock Island County, Illinois

Building permits, zoning and septic rules in Rock Island County, Illinois

54Index Score / 100
#65 of 102 in Illinois

Unincorporated Rock Island County, Illinois requires a building permit before construction, major alterations, demolition, occupancy changes, and regulated utility work1. The county also applies zoning outside cities and villages, while incorporated communities use their own departments2. Well and septic plans need approval from the Rock Island County Health Department3. Starting work before the permit is issued doubles the fee1.

At a glance

Building permit
Required for covered work in unincorporated areas1
Zoning
County rules apply outside cities and villages; incorporated places use their own departments2
Septic and well plans
Approval goes through the Rock Island County Health Department3
Owner-builder
A homeowner may work on their own home, but permits, inspections, and codes still apply4
Minimum lot size
Varies by zoning district, from one acre in SE-2 to 40 acres in AG-15
RV or tiny home
Long-term occupancy rules could not be confirmed; ask county zoning before buying6

Who to call

Building permits

Rock Island County Zoning & Building Safety Department

Building permits, plan review, and construction inspections for unincorporated Rock Island County

309-558-3771

1504 Third Avenue, Room 305, Rock Island, IL 61201

Zoning

Rock Island County Zoning & Building Safety Department

Zoning, setbacks, stormwater and floodplain administration for unincorporated Rock Island County

309-558-3771

1504 Third Avenue, Room 305, Rock Island, IL 61201

Septic permits

Rock Island County Health Department

Private sewage disposal (septic) and private well permits for Rock Island County

(309) 793-1955

2112 25th Ave. Rock Island, Illinois 61201

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 Rock Island County, Illinois?

Unincorporated Rock Island County, Illinois requires a building permit before constructing, enlarging, altering, repairing, moving, or demolishing a structure, changing its occupancy, or doing regulated electrical, gas, mechanical, or plumbing work1. A short list of small projects outside the floodplain is exempt, including a one-story accessory building no larger than 120 square feet7. Every improvement in the floodplain needs a permit, even work that would otherwise qualify for an exemption7. Starting covered work before the county issues the permit doubles the fee, with no exceptions1. Agricultural buildings can receive a free permit when they qualify, but the permit is still required and zoning, floodplain, sewage, fire, and other applicable rules remain in force8.

Who is the Rock Island County building department, and how do you reach them?

The Rock Island County Zoning & Building Safety Department handles permits and inspections for unincorporated property; each city or village has its own department for property inside its boundaries2. Reach the county department at 1504 Third Avenue, Room 305, Rock Island, IL 61201, or call 309-558-37717. Applications may be delivered by mail, email, or in person, and a typical residential review takes 3 to 5 business days9. Call to schedule inspections; requests made after 10 am are handled the following business day7. Rock Island County requires an occupancy permit after the work is complete and code compliance is confirmed; a floodplain project also needs an elevation certificate before occupancy approval10.

Does Rock Island County have zoning?

Rock Island County administers zoning on unincorporated land, including setbacks and stormwater review, while cities and villages administer their own rules2. The county publishes district descriptions, so the first useful question is the parcel's zoning classification11. Minimum residential lot size varies sharply by district: AG-1 requires 40 acres, AG-2 requires 15 acres, SE-1 requires 5 acres, and SE-2 requires 1 acre5. Setbacks and height limits also depend on the zoning district rather than one countywide figure1213. Short-term rentals classified as boarding houses or tourist homes need a special-use permit in R-2, R-3, and U-1 districts but are allowed by right in R-414. Give the Zoning & Building Safety Department the parcel address or parcel number before relying on a listing's description of buildability15.

How do septic permits work in Rock Island County?

The Rock Island County Health Department handles private sewage disposal for property without municipal sewer service, and county building applications require its approval of well and septic plans3. Illinois requires plan approval before a new private sewage system is built, but the county materials reviewed do not clearly label that approval as a separate septic permit16. Ask the Health Department what application, site evaluation, inspections, and fees apply to the parcel before finalizing a house plan17. Only about 40.6% of county soils lack a severe limitation for a conventional drain field, so a soil evaluation can materially affect the build budget18. The Health Department also offers inspections and consultations for existing and new septic systems and supports private water supplies where municipal water is unavailable17. A new, modified, or abandoned well requires advance approval from the state or an approved local health department19.

Can you live in an RV or tiny home on your land in Rock Island County?

We could not confirm a general Rock Island County rule allowing long-term RV occupancy, temporary camping, or tiny-home occupancy on private land in unincorporated areas. Ask the Zoning & Building Safety Department at 309-558-3771 about the parcel's district, proposed use, utilities, and any temporary-use approval before buying or moving a unit onto the land7. Illinois allows manufactured homes to be occupied, but county zoning, building, floodplain, and utility rules still control where and how one may be placed20. Rock Island County identifies a mobile/manufactured housing district, but the available county rule does not establish all conditions for a manufactured home on an individual parcel11. A tiny home used as a dwelling still cannot be occupied until the county issues the required occupancy approval for permitted construction10.

Building a home in Rock Island County: the steps, in order

  1. Ask Zoning & Building Safety to identify the parcel's district, minimum lot size, setbacks, floodplain status, and required permits115.
  2. If access will connect to a county highway, obtain the free Highway Department entrance permit and mark the proposed location for sight-distance and culvert review21.
  3. Get Health Department approval for the well and septic plans when municipal service is unavailable3.
  4. Submit the building application and plans by mail, email, or in person; typical residential review takes 3 to 5 business days9.
  5. Pay the fee, post the issued permit, and schedule inspections as the work proceeds9.
  6. Start within 30 days and complete the work within the permit's 180-day validity period unless the county grants a written extension1.
  7. Obtain the occupancy permit before moving in; floodplain construction also needs an elevation certificate first10.

What to check before you buy land in Rock Island County

Confirm jurisdiction first: county zoning applies only outside cities and villages, and incorporated places use their own departments2. Verify the zoning district and lot size because residential minimums range from 1 acre to 40 acres in the listed rural districts5. Order a soil evaluation before buying; only about 40.6% of county soils lack a severe limitation for a conventional drain field18. Check road ownership too: a new entrance onto a county highway requires a free county permit, while work in a state-road right-of-way requires an Illinois Department of Transportation permit2122. Every improvement on a floodplain parcel needs county approval, and regulated floodway work may also need a state permit723. The effective property tax rate is about 2.3%, with a median annual bill near $3,3722425.

Watch-outs

  • Floodplain parcels in Rock Island County have no exemption from the building permit requirement, not even for small accessory structures7.
  • Rock Island County charges double the normal permit fee for covered work started before the permit is issued, with no exceptions1.
  • Rock Island County has not published its rule for living in an RV or tiny home as a primary residence on raw land; confirm with the Zoning & Building Safety Department before you buy7.

Sources

  1. Building Permits, quoted and re-checked
  2. Zoning & Building Safety, quoted and re-checked
  3. Private Sewage Disposal, quoted and re-checked
  4. Rock Island County FAQs, quoted and re-checked
  5. Zoning Districts, quoted and re-checked
  6. Rock Island County Zoning & Building Safety (2026 county census)
  7. Rock Island County Zoning & Building Safety Department (rockislandcountyil.gov)
  8. Agricultural Exemption Application, quoted and re-checked
  9. Building Permits, quoted and re-checked
  10. Building Permits, quoted and re-checked
  11. Zoning Districts, quoted and re-checked
  12. 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
  13. 55 ILCS 5/5-12001 — Authority to regulate and restrict location and use of structures (Illinois statewide rule), quoted and re-checked
  14. Short-Term Rentals, quoted and re-checked
  15. Rock Island County Zoning & Building Safety Department (rockislandcountyil.gov)
  16. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  17. Rock Island County Health Department (richd.org)
  18. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  19. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  20. Manufactured & Modular Homes/Mobile Structures (Illinois statewide rule), quoted and re-checked
  21. Rock Island County FAQs, quoted and re-checked
  22. Highway Permits (Illinois statewide rule), quoted and re-checked
  23. Permit Program (Illinois statewide rule), quoted and re-checked
  24. Effective property tax rate: Bolthole Index county data
  25. Median property tax bill: 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.

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County locator

Rock Island County in Illinois

54
County map
Rock Island County highlighted among the Illinois counties · colored by Index score

How Rock Island County scores

Seclusion27100% ev.
Self-Sufficiency61100% ev.
Admin Boringness47100% ev.
Durability76100% ev.
Property Autonomy42100% ev.
Carry Cost57100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$160kTypical home
2.3%Property tax
$9,125Land / acre
37.7"Annual rain
4% of yrsSevere drought
5.2 / yr (+4.9)Mid-century 100°F days
14.5 daysMid-century dry spell
1.93" (+8%)Mid-century 1-day rain
1.76×Wildfire change factor
100%Forward climate coverage
$1,407Home insurance / yr
4.6% / yrInsurance growth
0.9%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
211,298People within 30 min
2,923,265People within 2 hr
112,661Radius comparison (15 mi)
330.4People / sq mi
3.1%Federal land
84.4%Land at 15% slope or less
40.6%Septic soil without severe limits
103,017 acWorkable land screen
26.4%Wooded land
51.3 tonsBiomass / forest ac
50.3°FAvg temp

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Answers from the rulebook for Rock Island County

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

Rock Island County rules

  • Building permitRequired

    Construction, alteration, repair, movement, demolition, occupancy changes, and regulated electrical, gas, mechanical, or plumbing work in unincorporated Rock Island County.

    • The application must be made to the Building Official before work is performed.
    • Floodplain improvements have no exemptions according to the county page.
    • Persons who begin work before obtaining a permit are charged double; the page states no exceptions.

    permit validity: 180 days (work must start within 30 days; written extension may add 180 days)

    “Any owner or owner's agent authorized agent who intends to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by the building code, or to cause any such work to be performed, shall first make application to the Building Official and obtain the required permit.”
  • Owner-builder exemptionAvailable (with conditions)

    A homeowner doing work on the homeowner's own home.

    • Proof of liability insurance is required from contractors who perform work.
    • The homeowner must still comply with applicable permits, inspections, and codes.
    “A homeowner can do the work on their home, but we do require proof of liability insurance from contractors who would do the work.”
  • Certificate of occupancyRequired

    Structures subject to county building permits in unincorporated Rock Island County.

    • The building official provides a certificate of occupancy or other certificate after construction is complete and code compliance is determined.
    • Occupancy is prohibited until an occupancy permit has been issued.
    • Floodplain occupancy requires an elevation certificate before the certificate of occupancy.
    “You may not occupy a structure until an occupancy permit has been issued.”
  • Local zoningVaries (with conditions)

    Aggregate local zoning across Rock Island County municipalities and unincorporated areas.

    • The county conclusion aggregates county zoning for unincorporated areas and separate municipal or village departments for incorporated areas.
    “This department only has authority over properties located in unincorporated Rock Island County. All Cities and Villages have their own departments to handle these issues.”
  • Zoning districtsPublished

    County zoning districts in unincorporated Rock Island County.

    • The county publishes brief descriptions and states that the entire zoning resolution is available through its downloads page.
    “The entire Zoning resolution with a full explanation of all zoning districts is available on our downloads page. Here are some brief descriptions of our Zoning Districts:”
  • Minimum lot sizeSpecified

    Residential lot sizes in county zoning districts in unincorporated Rock Island County.

    • AG-1 requires a minimum 40-acre lot size.
    • AG-2 requires a minimum 15-acre lot size.
    • SE-1 requires a minimum 5-acre lot size.
    • SE-2 requires a minimum 1-acre lot size.
    • The county states that residential lot sizes vary across the county, with some parcels as small as 20,000 square feet and some outlying building sites requiring 40 acres.

    AG-1 minimum lot size: 40 acres · AG-2 minimum lot size: 15 acres · SE-1 minimum lot size: 5 acres · SE-2 minimum lot size: 1 acre

    “AG-1 is a minimum 40-acre lot size and AG-2 is a minimum 15-acre lot size.”
  • Who permits septicCounty (with conditions)

    Private sewage disposal administration by the Rock Island County Health Department.

    • The program applies to properties without current access to municipal sewer service.
    • The program follows current Illinois State sewage codes.
    “Approval from Rock Island County Health Department - Environmental Division for your well and septic plans”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural structures or buildings in unincorporated Rock Island County.

    • Agricultural permits are issued free of charge, but a permit is still required.
    • The structure must qualify as an agricultural structure and may not be a place of human habitation, employment where agricultural products are processed, treated, or packaged, or a place used by the public.
    • Floodplain, zoning setbacks, state building, energy, plumbing, accessibility, private sewage, and fire-code requirements still apply.
    • The permit is incomplete until a final field inspection is conducted.

    agricultural permit fee: 0 USD (permit still required)

    “The Illinois Compiled Statutes (ILCS) Chapter 55 Section 5/5-12001 states permits with respect to the erection, maintenance, repair, alteration, remodeling or extension of buildings or structures used or to be used for agricultural purposes shall be issued free of any charge. However, a permit is still required.”
  • Driveway accessRequired

    A new entrance from private property onto a Rock Island County Highway.

    • The applicant must identify the location with stakes or marking paint.
    • The Highway Department inspects sight distance and determines culvert requirements.
    • After construction, the permit must be signed, dated, and returned.
    • There is no fee for the driveway access permit.

    driveway access permit fee: 0 USD

    “When a property owner wants to construct an entrance from their property to the County Highway the first step is to contact the Highway Department requesting an entrance permit.”
  • Short-term rentalsLimited

    Short-term rentals classified by the county as boarding houses or tourist homes.

    • Allowed by special-use permit in R-2, R-3, and U-1 districts.
    • Allowed by right in R-4 districts.
    • The use is a change in occupancy under IBC 3408.
    • Transient lodging is allowed in Occupancy Class R-3 under IBC 310.5.
    • Residential occupancy classifications regulated by the IBC require automatic fire sprinklers under IBC 903.2.8.
    “This type of use is allowed by Special Use Permit in R-2, R-3 and U-1 Districts. It is also allowed by right in R-4 zoning districts.”
  • Permit processPublished (with conditions)

    County building-permit process in unincorporated Rock Island County.

    • Applications may be submitted by mail, email, or in person.
    • Plans are reviewed by the Building Inspector.
    • Residential review typically takes 3-5 business days.
    • After approval, the permit is issued, posted at the job site, inspections are scheduled, and occupancy approval is issued when code compliance is determined.
    • Currently, cash or check payments are accepted.

    typical residential review time: 3-5 business days

    “Once your drawings, specifications, and permit application have been reviewed and approved, you will be issued a building permit.”
  • County-wide zoningPresent

    Rock Island County administers zoning through its Zoning & Building Safety Department, including setback and stormwater approvals for unincorporated properties.

    Rock Island County Zoning & Building Safety ↗Scouted from the county site, not yet independently re-checked

Illinois rules that apply here

  • Building code adoptedPartial

    Building-code requirements statewide in Illinois, including residential and commercial construction subject to the Capital Development Board Act baseline requirements.

    • Effective 2025-01-01, Illinois requires statewide baseline building-code requirements.
    • Local governments may adopt building codes, but they are not required to adopt codes; jurisdictions that do not adopt a code are treated as non-building-code jurisdictions and must follow the applicable state-law baseline requirements.
    • For jurisdictions with adopted codes, local codes must regulate structural design at least as stringently as the applicable IRC, IBC, or IEBC baseline.
    • Commercial buildings in non-building-code jurisdictions and state-funded buildings are subject to the state-listed codes and qualified-inspection requirements.
    • Residential requirements differ depending on whether the jurisdiction has adopted a compliant building code and whether the home purchaser and builder agree to an alternative code.

    statewide baseline effective date: 2025-01-01 · local code structural minimum for residential buildings: IRC minimum structural requirements · local code structural minimum for commercial new buildings: IBC minimum structural requirements · local code structural minimum for existing commercial buildings: IEBC minimum structural requirements

    “The State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide building codes effective 1/1/2025. [...] Commercial buildings in jurisdictions that have not adopted a building code AND state funded buildings. [...] Starting 1/1/25 local codes must regulate the structural design in a manner that is at least as stringent as the IBC© for new buildings or IEBC© for existing buildings. [...] Residential buildings in jurisdictions that have not adopted a building code where agreed to by the home purchaser and home builder. [...] Residential buildings in jurisdictions that have adopted a building code. [...] Starting 1/1/25 local codes must regulate the structural design in a manner that is at least as stringent as the IRC©.”
    One more reviewed finding on this topic
    • Adopted — Statewide baseline building-code requirements for residential construction in Illinois, including jurisdictions with and without locally adopted building codes.
      “Please be advised that the State of Illinois recently passed legislation (Public Act 103-0510) changing the Capital Development Board Act to require statewide baseline building codes effective 1/1/2025. Locally adopted building codes must comply with the requirements of the Act.”
  • InspectionsLimited

    Privately funded construction statewide in Illinois, as to inspections performed by the State rather than by a local authority having jurisdiction.

    • The Illinois Capital Development Board does not perform building-code inspections for privately funded construction.
    • If inspections are required, they are addressed by the applicable unit of local government.
    • A local municipality or county may be a non-building-code jurisdiction, in which case applicable state baseline requirements and inspection-certification provisions may apply.
    “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 — Building-code-compliance inspections performed 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”
  • Septic permitRequired

    Construction of a new private sewage disposal system statewide, including systems where a septic tank is replaced, a major component is added or removed, or the absorption field changes by at least 25 percent.

    • Plan approval must be obtained from IDPH or the applicable local authority before construction begins.
    • Persons constructing, installing, repairing, or modifying the system must notify the Department or local authority at least 48 hours before work begins.
    • The rule requires submission of plans, site and system information, bedroom count or design volume, soil or percolation information, owner information, and applicant signature.

    notice before commencement: >= 48 hours · absorption-field change threshold: >= 25 percent (The rule treats increasing the field by 25% or more, or removing and replacing 25% or more, as a new system.)

    “Plan approval shall be obtained from the Department or local authority prior to beginning any construction of a new private sewage disposal system.”
  • Septic inspectionLimited

    New and replacement surface-discharging private sewage disposal systems covered by Illinois EPA general NPDES Permit ILG62.

    • Coverage under the general permit is limited to eligible dischargers.
    • Systems not eligible for general-permit coverage may require an individual NPDES permit.
    • Periodic inspection, monitoring, and reporting are required under the permit.
    “The permit sets discharge limits and requires periodic inspection, monitoring and reporting.”
  • 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.”
  • 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.”
  • Permit feesVariable (with conditions)

    Applications and written inquiries for Illinois Department of Natural Resources public-water, dam, and floodway work requiring authorization.

    • The Department reviews applications and written inquiries free of charge to determine whether authorization is required when sufficient information is provided.
    • A permit application fee may apply under the Department's permit fee schedule.
    “January 15, 2014, a new Permit Application Fee went into effect. All applications and written inquiries received will be reviewed free of charge to determine whether the Public Water, dam and/or floodway work proposed requires authorization by the Department, so long as sufficient information is provided for the Department to make that determination.”
  • 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 authorityGeneral

    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 a building code.
    • A county that does not adopt a building code is treated as a non-building-code jurisdiction, and section 10.09-1 of the Capital Development Board Act applies.
    • A county that adopts a building code must comply with section 10.18 of the Capital Development Board Act.
    • Locally adopted codes must regulate residential structural design at least as stringently as the baseline International Residential Code.
    • For privately funded projects, the local code official is the authority having jurisdiction; the State does not issue private-project building permits, perform plan reviews, or perform inspections.
    “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.

  • Minimum dwelling size — Minimum dwelling size in unincorporated Rock Island County.
  • Lot coverage — Lot coverage in unincorporated Rock Island County.
  • Living in an RV — Long-term RV occupancy on private land in unincorporated Rock Island County.
  • Camping on your land — Temporary camping on private land in unincorporated Rock Island County.
  • Tiny homes — Tiny-home occupancy in unincorporated Rock Island County.
2 more unanswered
  • Accessory dwellings
  • Mandatory utility hookup

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 Rock Island County, Illinois

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

Rock Island County scores 54/100 on the Bolthole Index, a solid county profile. Its strengths: mixed durability signals and workable self-sufficiency basics (37.7″/yr rainfall). Watch-outs: about 211,298 people within a 30-minute drive.

Do you need a building permit in Rock Island County, Illinois?

Rock Island County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Rock Island County Health Department - Private Sewage Disposal. 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 Rock Island County, Illinois?

Land in Rock Island County runs about $9,125 per acre, based on the latest county data.

What is the water situation in Rock Island County?

Rock Island County gets about 37.7" of rain a year, with severe drought in roughly 4% of years.

How remote is Rock Island County?

A representative private-land location has about 211,298 people within a 30-minute drive and 2,923,265 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.

Off-grid gear

Going off-grid in Rock Island County means bringing your own water and power. The kit we’d start with:

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How Rock Island compares in Illinois

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