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 building permits for construction, major alterations, demolition, occupancy changes and regulated utility work1. County zoning applies outside cities and villages; municipal departments handle building and zoning issues inside their boundaries2. Private sewage permits remain with the Rock Island County Health Department, with village sign-off also required in Carbon Cliff34.

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 permit
Required for private sewage system installation or repair through the county health department3
Owner-builder
A homeowner may work on their own home, but permits, inspections, and codes still apply5
Minimum lot size
Varies by district; SE-2 requires one acre and AG-1 requires 40 acres67
RV living
Residential-lot living prohibited except free guest stays; county page limits guests to 30 days per calendar year89
Tiny home
Must qualify as a one-family dwelling on a permanent foundation; county dwelling minimum is 900 sq. ft.1011

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 October 12, 2026.

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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. The county moved to the 2021 I-codes and 2020 NEC effective October 1, 2026,12. A short list of small projects outside the floodplain is exempt, including a one-story accessory building no larger than 120 square feet13. Floodplain improvements have no permit exemptions14. Starting covered work before permit issuance doubles the fee, with no exceptions15. Qualified agricultural buildings receive a free permit, but still need that permit and remain subject to applicable zoning, floodplain, sewage, fire, and other rules16.

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

The Rock Island County Zoning & Building Safety Department handles building permits and inspections for unincorporated property at 1504 Third Avenue, Room 305, Rock Island, IL 61201; call 309-558-377113. Inside Moline, apply to the city for building permits17. Carbon Cliff contracts with East Moline for building permitting and inspections; private sewage still requires village and County Health Department approval184. County applications go by mail, email or in person, naming the property owner and generally including detailed plans; residential review typically takes 3–5 business days19. County building fees vary with project value, and plumbing and gas inspections cost $12 per opening20. The registered contractor or subcontractor requests inspections, and final approval requires completed subcontracted work and smoke and carbon monoxide detectors21.

Does Rock Island County have zoning?

Rock Island County administers zoning only on unincorporated land22. Moline, East Moline, Silvis and Carbon Cliff have municipal zoning; private sewage remains under the County Health Department, with Carbon Cliff also requiring village sign-off23242526274. The county publishes district summaries, its zoning resolution and a map; identify the parcel’s district before evaluating a use2829. County minimum building-site sizes vary by location, from examples of 20,000 square feet to 40 acres; AG-1 requires 40 acres and AG-2 requires 15 acres307. In SE-2, primary structures need 40-foot front and rear yards and side yards at least 15 feet wide totaling 30 feet6. Short-term rentals require a special-use permit in R-2, R-3 and U-1 but are allowed by right in R-431.

How do septic permits work in Rock Island County?

The Rock Island County Health Department requires a permit to install or repair a private sewage disposal system, including work associated with new construction, renovation, tank-only projects, and tank demolition3. Properties without municipal sewer service must dispose of wastewater under Illinois sewage codes; the Health Department offers consultations and inspections for new and existing systems32. Ask the Health Department what site evaluation, inspections, and fees apply before finalizing a house plan33. Only about 40.6% of county soils lack a severe limitation for a conventional drain field, so soil suitability can materially affect the design and budget34. A new, modified, or abandoned well also requires advance approval from the state or an approved local health department35.

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

Unincorporated Rock Island County prohibits RV living, sleeping or housekeeping on residential lots except free stays by guests of the principal resident8. The county page limits those stays to 30 days per calendar year, while the ordinance says 30 consecutive days; ask Zoning & Building Safety which limit applies before planning a stay9836. Extended bump-outs and connected utilities count as occupancy, and seasonal camping along a body of water requires a Special Use Permit937. In R-1, a tiny home must qualify as a one-family detached dwelling on a permanent masonry or concrete foundation10. The county separately states a dwelling minimum of 900 square feet; the one-family definition also includes a 900-square-foot separation requirement, which is not a floor-area allowance1138. All dwellings, including manufactured homes, need a full perimeter foundation below the 42-inch frost line and an occupancy permit before habitation3940.

What are the steps to build a home in Rock Island County?

  1. Ask Zoning & Building Safety to identify the parcel's district, lot size, setbacks, and floodplain status297.
  2. If a subdivision lies within 1.5 miles of an incorporated municipality with a subdivision ordinance, account for municipal review before county approval41.
  3. Obtain the Health Department permit for private sewage installation or repair and approval for well and septic plans when municipal service is unavailable327.
  4. Submit the building application and detailed plans by mail, email, or in person19.
  5. Pay the department-calculated fee, post the issued permit card, and have the registered contractor or subcontractor request required inspections1521.
  6. Start within 30 days; the permit remains valid for 180 days, with one possible additional 180-day extension by written request42.
  7. Pass the final inspection and obtain the occupancy permit before moving in2140.

What should you check before buying land in Rock Island County?

Confirm jurisdiction first: county zoning applies only outside cities and villages, and incorporated places use their own departments43. Verify the zoning district and lot dimensions because minimum lot size and setbacks are district-specific76. Order a soil evaluation before buying; only about 40.6% of county soils lack a severe limitation for a conventional drain field34. 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 permit4445. Floodplain improvements have no county permit exemption, and floodplain occupancy requires an elevation certificate before the occupancy certificate14. The effective property tax rate is about 2.3%, with a median annual bill near $3,3724647.

Watch-outs

  • Floodplain parcels in Rock Island County have no exemption from the building permit requirement, not even for small accessory structures13.
  • Rock Island County charges double the normal permit fee for covered work started before the permit is issued, with no exceptions15.
  • Rock Island County’s RV exception covers guests of an existing principal resident; do not assume an RV is approved housing while building on vacant land8.

Sources

  1. Building Permits, quoted and re-checked
  2. Zoning & Building Safety, quoted and re-checked
  3. Application to Install or Repair Private Sewage Disposal System, quoted and re-checked
  4. Village of Carbon Cliff: Carbon Cliff Code of Ordinances, Title VI—Sewer (Rock Island County), quoted and re-checked
  5. rockislandcountyil.gov, quoted and re-checked
  6. § 154.155 Lot Area and Yard Requirements, quoted and re-checked
  7. Zoning Districts, quoted and re-checked
  8. Rock Island County Zoning Ordinance, quoted and re-checked
  9. rockislandcountyil.gov, quoted and re-checked
  10. Zoning & Building Safety, quoted and re-checked
  11. Rock Island County Zoning Ordinance, quoted and re-checked
  12. Building Codes, quoted and re-checked
  13. Rock Island County Zoning & Building Safety Department (rockislandcountyil.gov)
  14. Zoning & Building Safety, quoted and re-checked
  15. Contractor Information, quoted and re-checked
  16. Agricultural Exemption Application, quoted and re-checked
  17. Moline: Home/Building Improvements (Rock Island County), quoted and re-checked
  18. Village of Carbon Cliff: Carbon Cliff Code of Ordinances, Title IV—Building and Housing (Rock Island County), quoted and re-checked
  19. Building Permits, quoted and re-checked
  20. Contractor Information, quoted and re-checked
  21. Required Inspections and Sequence, quoted and re-checked
  22. Zoning & Building Safety, quoted and re-checked
  23. Moline: Zoning Standards & Zoning Map (Rock Island County), quoted and re-checked
  24. East Moline: official source (Rock Island County), quoted and re-checked
  25. Silvis: Silvis Code, Sec. 102-227, Zoning map (Rock Island County), quoted and re-checked
  26. Village of Carbon Cliff: Zoning Ordinance of the Village of Carbon Cliff, Illinois (Rock Island County), quoted and re-checked
  27. Water and Sewage, quoted and re-checked
  28. Zoning, quoted and re-checked
  29. Downloads, quoted and re-checked
  30. Zoning, quoted and re-checked
  31. Short-Term Rentals, quoted and re-checked
  32. Water and Sewage, quoted and re-checked
  33. Rock Island County Health Department (richd.org)
  34. 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
  35. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  36. Rock Island County Zoning & Building Safety Department (rockislandcountyil.gov)
  37. rockislandcountyil.gov, quoted and re-checked
  38. Rock Island County Zoning Resolution, quoted and re-checked
  39. Popular Topics - Zoning, quoted and re-checked
  40. Building Permits, quoted and re-checked
  41. § 153.03 Jurisdiction, quoted and re-checked
  42. Building Permits, quoted and re-checked
  43. Zoning & Building Safety, quoted and re-checked
  44. Rock Island County FAQs, quoted and re-checked
  45. Highway Permits (Illinois statewide rule), quoted and re-checked
  46. Effective property tax rate: Bolthole Index county data
  47. Median property tax bill: 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, Rock Island County requires a building permit for a home.

RuleRock Island CountyHenry CountyWhiteside CountyMercer CountyCarroll CountyBureau CountyStark County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.Henry & Stark County Health Dept.

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%Soils rated "not limited" for septic (strict USDA rating)
103,017 acWorkable land screen
26.4%Wooded land
51.3 tonsBiomass / forest ac
50.3°FAvg temp

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Cities and towns in Rock Island 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: Andalusia Township · Village of Andalusia · Blackhawk Township · Bowling Township · Buffalo Prairie Township · Canoe Creek Township · Coal Valley Township · Village of Coal Valley · Coe Township · Cordova Township · Village of Cordova · Drury Township · Edgington Township · Hampton Township · Village of Hampton · Village of Hillsdale · Village of Oak Grove · Port Byron Township · Village of Port Byron · Village of Rapids City · Village of Reynolds · Rock Island · Rock Island Township · Rural Township · South Moline Township · South Rock Island Township · Zuma Township

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.

    • Application must be made to the Building Official before the regulated work is performed.
    • Permits are valid for 180 days if work starts within 30 days; the Building Official may extend a permit once for an additional 180 days upon written request.
    • Floodplain improvements have no permit exemptions.
    • Listed exemptions include limited fences, accessory buildings, painting, shallow prefabricated pools, retaining walls, and certain window awnings, subject to the page's conditions.

    permit validity: 180 days (Work must start within 30 days of issuance; an additional 180-day extension may be granted upon written request.) · late permit charge: double (Persons not obtaining a permit before beginning a project are charged double; no exceptions.)

    “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.”
    One more reviewed finding on this topic
    • Required — Construction, alteration, repair, movement, demolition, occupancy changes, and regulated electrical, gas, mechanical, and plumbing work in unincorporated Rock Island County.
      “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.”
  • Building code adoptedPartial

    Building-code enforcement by Rock Island County for properties in unincorporated Rock Island County.

    • The page labels the current list as not inclusive of all federal and State of Illinois requirements.
    • The listed 2012 International codes and 2011 NEC have local amendments.
    • The page states that Rock Island County will move to the 2021 I-codes and 2020 NEC effective October 1, 2026.
    • The listed 2024 Illinois Energy Conservation Code is stated to be effective November 30, 2025.
    • Fire codes are administered per fire protection district and/or the Illinois State Fire Marshal.

    code transition effective date: 2026-10-01 · Illinois Energy Conservation Code effective date: 2025-11-30

    “We are currently in the process of updating our building codes. Effective October 1st, 2026 we will move to the 2021 I-codes and 2020 NEC.”
    2 more reviewed findings on this topic
    • Adopted (with conditions) — County-enforced building codes for unincorporated Rock Island County.
      “We are currently in the process of updating our building codes. Effective October 1st, 2026 we will move to the 2021 I-codes and 2020 NEC.”
    • Adopted (with conditions) — County building-code enforcement in unincorporated Rock Island County.
      “We are currently in the process of updating our building codes. Effective October 1st, 2026 we will move to the 2021 I-codes and 2020 NEC. [...] Current Codes Being Used (not inclusive of all Federal and State of Illinois Requirements):”
  • InspectionsRequired

    Construction work subject to Rock Island County building permits and inspections in unincorporated Rock Island County.

    • Only the registered contractor or subcontractor who did the work and obtained the permit should request inspections.
    • Plans, manufacturers’ installation instructions, and modification documentation must be on site for reference.
    • The source describes the list as generic and states that jobs are unique; applicants should discuss specific questions with the inspector.
    • Final inspection requires subcontracted work to be done, inspected, and approved; smoke and carbon monoxide detectors must be in place; and an occupancy permit must be obtained before habitation.
    “Once work has begun, the County's inspectors will inspect the work to ensure that it is being performed in accordance with the plans submitted and with applicable codes.”
    2 more reviewed findings on this topic
    • Required — Permitted construction in unincorporated Rock Island County.
      “Once work has begun, the County's inspectors will inspect the work to ensure that it is being performed in accordance with the plans submitted and with applicable codes.”
    • Required — Permitted construction in unincorporated Rock Island County.
      “Once work has begun, the County's inspectors will inspect the work to ensure that it is being performed in accordance with the plans submitted and with applicable codes.”
  • Certificate of occupancyRequired

    Structures subject to county building-code enforcement in unincorporated Rock Island County.

    • The certificate is issued when construction is complete and code compliance is determined.
    • A structure may not be occupied before an occupancy permit is issued.
    • Floodplain occupancy requires an elevation certificate before the certificate of occupancy is issued.
    • Failure to comply may include fines of up to $1,500 per day.

    maximum stated fine: <= 1500 USD per day

    “The building official will provide a certificate of occupancy or other certificate when construction is complete and code compliance is determined. This certificate verifies that your project has been completed to code and to the County's satisfaction. You may not occupy a structure until an occupancy permit has been issued.”
    One more reviewed finding on this topic
    • Required — Structures subject to county building-code approval in unincorporated Rock Island County.
      “The building official will provide a certificate of occupancy or other certificate when construction is complete and code compliance is determined. [...] You may not occupy a structure until an occupancy permit has been issued.”
  • County-wide zoningPresent (with conditions)

    County zoning regulations and zoning administration for properties in unincorporated Rock Island County.

    • The county department states that it has authority only over unincorporated Rock Island County.
    • All cities and villages have their own departments for zoning and building issues.
    • Zoning requests may include variances, rezoning, and special-use permits.
    “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.”
    2 more reviewed findings on this topic
    • Present (with conditions) — County zoning and related land-use controls in unincorporated Rock Island County.
      “Rock Island County Zoning and Building Department is responsible for Zoning, Building, Property Maintenance, Planning, Stormwater and Floodplain ordinances. [...] This department only has authority over properties located in unincorporated Rock Island County.”
    • Present (with conditions) — Zoning, special-use, variance, and related land-use controls administered by Rock Island County for unincorporated properties.
      “Rock Island County Zoning and Building Department is responsible for Zoning, Building, Property Maintenance, Planning, Stormwater and Floodplain ordinances. [...] This department only has authority over properties located in unincorporated Rock Island County.”
  • Local zoningVaries (with conditions)

    Aggregate of unincorporated county zoning and incorporated-city/village zoning across Rock Island County.

    • Rock Island County administers zoning only in unincorporated areas.
    • Cities and villages have their own departments and may apply separate ordinances.
    “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.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate local zoning across Rock Island County, including county zoning in unincorporated areas and separate municipal zoning in incorporated cities and villages.
      “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 (with conditions)

    Rock Island County zoning districts and regulations applicable in unincorporated areas.

    • The county states that zoning regulations are in Title XV: Land Usage of the County Code of Ordinances.
    • Incorporated cities and villages administer their own zoning.
    “In 2000 Rock Island County adopted the Quad City Unified Ordinance. Since then we have made some changes to that ordinance. You can find zoning regulations in the County Code of Ordinances, Title XV: Land Usage.”
    2 more reviewed findings on this topic
    • Published (with conditions) — County zoning districts and zoning regulations for unincorporated Rock Island County.
      “Zoning Map 2016 - 11 by 17 (PDF) [...] Rock Island County Zoning Regulations”
    • Published — County zoning districts in unincorporated Rock Island County.
      “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 dwelling sizeSpecified

    One-family dwellings regulated by the Rock Island County zoning resolution in unincorporated areas; the ordinance states a 900-square-foot separation requirement but does not clearly state that 900 square feet is the dwelling's floor area.

    • The building must be designed exclusively for use and occupancy by one family.
    • It must be entirely separated from any other dwelling by space totaling at least 900 square feet.
    • The structure length may not exceed four times its width.
    • The structure must be affixed to a permanent masonry or concrete footing and/or foundation as defined in the adopted Rock Island County Building Codes.
    • The structure must have a minimum 3:12 nominal roof pitch, conventional residential roofing material, conventional residential siding extending to within 8 inches of ground elevation except when placed upon a masonry or concrete foundation, and a 6-inch minimum eave overhang.

    separation from any other dwelling: >= 900 square feet · nominal roof pitch: >= 3:12 · maximum structure length-to-width ratio: <= 4 ratio · minimum eave overhang: >= 6 inches

    “Dwelling, One-family. A building designed exclusively for use and occupancy by one family”
    One more reviewed finding on this topic
    • Specified — One-story, story-and-a-half, and two-story dwellings governed by the Rock Island County zoning ordinance in unincorporated Rock Island County.
      “and be at least nine hundred (900) square feet with the length being no more than four times (4x) the width.”
  • Minimum lot sizeSpecified

    Residential and agricultural zoning districts in unincorporated Rock Island County.

    • Minimum lot size varies by district and location.
    • AG-1 requires at least 40 acres; AG-2 requires at least 15 acres.
    • The county property page states that countywide minimum lot sizes range from 20,000 square feet to 40 acres in some outlying areas.

    AG-1 minimum lot size: >= 40 acres · AG-2 minimum lot size: >= 15 acres · reported county range lower bound: >= 20000 square feet (The page describes varying minimums, not a universal countywide minimum.)

    “AG-1 is a minimum 40-acre lot size and AG-2 is a minimum 15-acre lot size.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Minimum building-site area in unincorporated Rock Island County.
      “This varies depending on where the property is located. The smallest parcels may be 20,000 square feet (just shy of 1/2 acre). If you are looking at a property that is in the extreme outlying areas, Rock Island County may require a minimum of 40 acres for a building site.”
  • SetbacksDistrict specific (with conditions)

    Primary structures in the SE-2 Suburban Estates Medium Density zoning district in unincorporated Rock Island County.

    • Accessory structures must meet the requirements of § 154.039.
    • The cited requirements are specific to the SE-2 district and do not establish a single countywide setback.
    • The ordinance was passed May 16, 2023.

    minimum lot area: >= 1 acre · minimum lot width: >= 165 feet · front yard depth: >= 40 feet · least side yard width: >= 15 feet · side yard sum: >= 30 feet · rear yard: >= 40 feet

    “The following minimum requirements shall be met for primary structures. Accessory structures shall meet the requirements of § 154.039. Lot Area | Lot Width | Front Yard Depth | Least Side Yard Width | Side Yard Sum | Rear Yard 1 acre | 165 feet | 40 feet | 15 feet | 30 feet | 40 feet”
  • Living in an RVLimited

    Recreational vehicle parking, storage, and guest occupancy on residential lots in county-regulated unincorporated areas of Rock Island County.

    • An RV may not be parked or stored on a residential lot except in a required side or rear yard meeting all setbacks and on an impervious surface.
    • Loading and unloading may occur anywhere on residential premises for no more than 24 hours, no more than twice in any consecutive seven-day period, with at least 30 hours between occurrences.
    • An RV may not be used for living, sleeping, or housekeeping on a residential lot or in a location not approved for that use, except for housing guests of the principal resident.
    • Guest occupancy must not exceed 30 consecutive days and no charge may be made for the occupancy.
    • The ordinance also states that outdoor storage of an RV on residential premises must be in condition for safe and effective performance, or capable of being made so at a cost not exceeding its existing value; equipment not in that condition may not be stored for more than six months.

    loading/unloading duration: <= 24 hours (No more than twice in any consecutive seven-day period; at least 30 hours must separate occurrences.) · guest occupancy: <= 30 consecutive days (No charge may be made for such occupancy.) · outdoor storage when not operable: <= 6 months (Applies when the equipment is not in condition for safe and efficient performance and cannot be made so at a cost not exceeding its existing value.)

    “No such equipment shall be used for living, sleeping or housekeeping purposeswhen parked orstoredon a residential lot, or in any location not approved for such use, however, that such equipment may be used for the housing of guests of occupants of the principle residentif(a) occupancy shallnot exceed thirty (30) consecutive days; and (b) no charge is made for such occupancy.”
    2 more reviewed findings on this topic
    • Limited — Recreational vehicle parking, storage, temporary guest housing, and seasonal camping in unincorporated Rock Island County.
      “Temporary Use. A RV may be used for the housing of guests of occupants of the owner of the principle resident if it does not exceed 30 days in a calendar year and no charge is made for such occupancy. When a RV has bump outs extended and utilities running to it, that is considered as being occupied.”
    • Limited — Recreational vehicle parking, storage, seasonal use, and temporary guest occupancy in unincorporated Rock Island County.
      “Temporary Use. A RV may be used for the housing of guests of occupants of the owner of the principle resident if it does not exceed 30 days in a calendar year and no charge is made for such occupancy. When a RV has bump outs extended and utilities running to it, that is considered as being occupied.”
  • Camping on your landLimited

    Temporary and seasonal camping in unincorporated Rock Island County.

    • Seasonal camping along a body of water requires a Special Use Permit.
    • The source's temporary RV guest-use rule limits occupancy to 30 days per calendar year with no charge.
    • RV storage and occupancy conditions also apply.

    temporary RV guest occupancy: <= 30 days per calendar year (no charge may be made)

    “Seasonal Use. There are provisions where a RV may be used in conjunction with a Special Use Permit to allow for camping along a body of water. Temporary Use. A RV may be used for the housing of guests of occupants of the owner of the principle resident if it does not exceed 30 days in a calendar year and no charge is made for such occupancy.”
  • Tiny homesLimited

    A tiny home used as a permanent one-family dwelling in an R-1 district within unincorporated Rock Island County.

    • The county zoning code does not expressly use the term tiny home; the unit must qualify as a one-family detached dwelling under the county definitions.
    • The dwelling must be affixed to a permanent masonry or concrete footing and/or foundation.
    • The structure must satisfy the county definition's additional requirements: separation from other dwellings by space totaling at least 900 square feet, length not exceeding four times width, minimum three-to-12 nominal roof pitch, conventional residential roofing material, conventional residential siding extending to within eight inches of ground elevation except when placed upon a masonry or concrete foundation, and six-inch minimum eave overhang.
    • The R-1 district permits one-family detached dwellings; other zoning districts have different use rules.
    • The county department's authority applies only to unincorporated areas; cities and villages administer their own rules.
    • A building permit must be obtained before construction or occupancy-related work, and a certificate of occupancy or other certificate must be issued before the structure may be occupied.
    • Applicable building, zoning, floodplain, stormwater, utility, and septic requirements still apply.
    “The following are permitted uses in the R-1 District: (A) One-family detached dwellings;”
  • Manufactured homesLimited

    Manufactured-home placement and occupancy in unincorporated Rock Island County.

    • The county building-permit page identifies manufactured-home placement as a specialty permit-fee category.
    • Residential dwelling standards on the county zoning page apply to manufactured construction and require a full perimeter foundation extending below the 42-inch frost line.

    minimum frost-line foundation depth: >= 42 inches

    “This applies to all types of construction including Post Frame Construction, Modular, Manufactured or conventional stick framed construction. All dwellings must have a full perimeter foundation that extends below our frost line of 42 inches.”
  • Who permits septicCounty (with conditions)

    Private sewage disposal and septic services administered through the Rock Island County Health Department.

    • The program applies to properties without current access to municipal sewer service.
    • The program implements current Illinois State sewage codes.
    “This program is designed to insure that properties that don't have current access to municipal sewer service, are able to dispose of waste flows in accordance with current Illinois State sewage codes. We offer inspections and consultations for existing and new septic systems.”
  • Septic permitRequired

    Installation or repair of private sewage disposal systems in Rock Island County.

    • The county application covers renovation, new construction, tank-only, mini, and tank-demolition work.
    • Applications require county health-department approval and certification that installation conforms to county and Illinois law.
    “APPLICATION TO INSTALL OR REPAIR PRIVATE SEWAGE DISPOSAL SYSTEM [...] Health Department Approval: _____________________________________ Date: _________________”
  • Off-grid sanitationLimited

    Properties without current access to municipal sewer service.

    • Waste flows must comply with current Illinois State sewage codes.
    • The county health department offers inspections and consultations for existing and new septic systems.
    “This program is designed to insure that properties that don't have current access to municipal sewer service, are able to dispose of waste flows in accordance with current Illinois State sewage codes. We offer inspections and consultations for existing and new septic systems.”
  • 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.”
  • Subdividing landRegulated (with conditions)

    Subdivision proposals in the unincorporated area of Rock Island County.

    • If the proposed subdivision is within one and one-half miles of an incorporated municipality with a formal subdivision ordinance, that municipality has an opportunity to review it.
    • If two or more such municipalities are within one and one-half miles, all have an opportunity to review.
    • A subdivision requiring municipal review may not be approved before formal approval by the involved municipalities.

    municipal review radius: 1.5 miles (Applies where an incorporated municipality has a formal subdivision ordinance.)

    “This chapter shall be applicable within the unincorporated area of the county. In instances where the proposed subdivision is located within one and one-half miles of an incorporated municipality with a formal subdivision ordinance, the incorporated municipality shall have opportunity to review the proposed subdivision.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivisions and related development in unincorporated Rock Island County, including manufactured-home parks, annexation agreements, planned unit developments, and additions to manufactured-home parks and subdivisions in floodplain contexts.
      “This Resolution shall divide the unincorporated area of Rock Island County into districts; regulate therein the use of land, buildings, and structures;”
  • 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.”
  • Building in a floodplainRequired

    Development and occupancy in mapped floodplain areas under county floodplain and building administration.

    • Work exemptions from a permit do not apply to properties in the floodplain.
    • Floodplain occupancy requires an elevation certificate before a certificate of occupancy is issued.
    • The county zoning/building department administers floodplain ordinances only in unincorporated areas.
    “Building permits are required for all improvements to a property if it is located in the floodplain: there are no exemptions. If the improvement is insurable, it requires a permit.”
    One more reviewed finding on this topic
    • Required — Building and improvement work in floodplain areas of unincorporated Rock Island County.
      “Building permits are required for all improvements to a property if it is located in the floodplain: there are no exemptions. If the improvement is insurable, it requires a 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 feesPublished (with conditions)

    Building permit fees administered by the Rock Island County Zoning and Building Safety Department.

    • The fee schedule is based on national averages including labor and materials or contractors' bids.
    • Plumbing and gas inspection fees are $12 per opening.
    • Specialty items, including demolitions, manufactured-home placement, moving buildings, signs, and wind and communication towers, have special fees.
    • Official fees are determined by department staff.
    • Fees vary with the value of the work, and persons who begin work before obtaining a permit are charged double with no exceptions.

    plumbing inspection fee: 12 USD per opening · gas inspection fee: 12 USD per opening · pre-permit-work fee multiplier: 2 times applicable fee (No exceptions stated.)

    “Fees vary with the value of the work being done using contractors' bids or national averages, including labor. Persons not obtaining a permit PRIOR to beginning a project shall be charged double. No exceptions.”
    3 more reviewed findings on this topic
    • Published (with conditions) — County building and related permit fees in unincorporated Rock Island County.
      “Rock Island County uses a Fee Schedule (PDF) based on national averages including labor and materials or the contractors' bids. Plumbing and Gas inspection fees are $12 per opening.”
    • Variable (with conditions) — County building-permit fees in unincorporated Rock Island County.
      “Plumbing and Gas inspection fees are $12 per opening. [...] Fees vary with the value of the work being done using contractors bid or national averages, including labor. Persons not obtaining a permit prior to beginning a project shall be charged double. No exceptions.”
    • Published (with conditions) — County building-permit and inspection fees in unincorporated Rock Island County.
      “Rock Island County uses a Fee Schedule (PDF) based on the contractors' bids. Plumbing and Gas inspection fees are $12 per opening. Official fees are to be determined by the staff of the Rock Island County Zoning and Building Safety Department. Specialty items such as demolitions, manufactured home placement, moving of buildings, signs, and wind and communication towers have special fees.”
  • Permit processPublished (with conditions)

    Building-permit applications and inspections in unincorporated Rock Island County.

    • Applications may be submitted by mail, email, or in person.
    • The property owner should be listed as applicant.
    • Most projects require detailed plans.
    • Plans are reviewed by the Building Inspector; incomplete submissions trigger notice of missing information.
    • Residential review typically takes 3-5 business days.
    • Zoning approval may also be needed for setbacks and stormwater.
    • The permit card must be posted at the job site.

    typical residential review time: 3-5 business days (Typical, not a guaranteed deadline.)

    “All applications should be submitted via mail, email or in person. The property owner should be listed as applicant. For most projects, you should also submit detailed plans for the work to be done. [...] Typical review time for residential projects are 3-5 business days. You may also need approval from the Zoning Department for setbacks and stormwater.”
    2 more reviewed findings on this topic
    • Published (with conditions) — County building-permit application, review, issuance, inspection, and closeout process in unincorporated Rock Island County.
      “All applications should be submitted via mail, email or in person. The property owner should be listed as applicant. For most projects, you should also submit detailed plans for the work to be done. [...] Typical review time for residential projects are 3-5 business days.”
    • Published (with conditions) — County building-permit process in unincorporated Rock Island County.
      “The following are the steps for obtaining a permit and having the project approved by the County.”

Illinois rules that apply here

  • 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”
  • 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.”
  • 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.”
  • 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.

  • Lot coverage — Lot-coverage requirements in unincorporated Rock Island County.
  • Accessory dwellings — Accessory dwelling units in unincorporated Rock Island County.
  • Mandatory utility hookup — Water and sewer connection requirements for development in Rock Island County.

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.

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

Living in an RV on your own land in Rock Island County is limited to specific cases: Recreational vehicle parking, storage, and guest occupancy on residential lots in county-regulated unincorporated areas of Rock Island County. An RV may not be parked or stored on a residential lot except in a required side or rear yard meeting all setbacks and on an impervious surface. Loading and unloading may occur anywhere on residential premises for no more than 24 hours, no more than twice in any consecutive seven-day period, with at least 30 hours between occurrences. A tiny home is limited to specific cases. Confirm with the county before relying on it.

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.

How Rock Island compares in Illinois

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