Bolthole Index

DeKalb County, Illinois

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

35Index Score / 100
#94 of 102 in Illinois

Unincorporated DeKalb County, Illinois requires a building permit for covered construction and applies county zoning, both handled by DeKalb County Community Development123. The DeKalb County Health Department issues septic and private-well permits4. Incorporated cities and villages fall outside the county zoning ordinance and may apply their own rules5.

At a glance

Building permit
Required for covered construction in unincorporated DeKalb County6
Zoning
County zoning applies in unincorporated areas7
Septic authority
DeKalb County Health Department; permit, soil evaluation and final approval required891011
Private well
A Health Department permit is required12
Owner-builder
Conditional homeowner form for an owner-occupant acting as a subcontractor13
RV or tiny home
RV parking has limits; A-1 recreational camps need special use approval; residential occupancy remains unconfirmed1415
Farm structures
Agricultural-exempt structures still need a construction card and must meet setbacks and stormwater rules16

Who to call

Building permits

DeKalb County Community Development Department

Building permits, construction inspections and zoning for unincorporated DeKalb County

815-895-7188

dhiland@dekalbcounty.org

Administration Building, 110 E. Sycamore Street, Sycamore, IL 60178

Septic permits

DeKalb County Health Department, Environmental Health Division

Private sewage-disposal and private-well permits in DeKalb County

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

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

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

Yes. DeKalb County reviews and issues building permits for covered construction in unincorporated areas; starting permit-required work early doubles the permit fees6. Unincorporated DeKalb County uses the 2021 International Building Code with county amendments, alongside adopted electrical and state plumbing requirements17. The permit holder or agent must give the building official at least 1 work day's notice when work is ready for inspection18. A building governed by Chapter 14 cannot be used or occupied until the building official issues a certificate of occupancy or completion19. Agricultural exemption does not mean no county paperwork: an exempt farm structure must obtain an Agricultural Exempt Structure Construction Card and still comply with county setback and stormwater requirements16.

Who issues DeKalb County building permits, and how do you reach the office?

DeKalb County Community Development issues building permits for unincorporated land; call 815-895-7188 or email dhiland@dekalbcounty.org, or visit the Administration Building, 110 E. Sycamore Street, Sycamore, IL 601783. Submit applications, attachments and payment in hard copy; electronic submissions are not accepted20. A new one- or two-family residence costs $0.60 per square foot of floor area, plus separate $150 electrical, $150 plumbing and $150 mechanical fees21. An owner-occupant acting as a subcontractor may submit a Homeowner Exemption Contractor Registration Form; the form does not waive all contractor or code requirements13.

Sycamore22, Sandwich23, Hinckley24, Shabbona25 handle their own building permits. Septic permits remain a separate Health Department matter89.

Does DeKalb County have zoning, and what does that mean for rural land?

DeKalb County zoning applies to unincorporated land, outside incorporated municipalities5. Minimum lot area varies: 40 acres for an A1 farm residence, 1 acre in RC-1 unless a drain field needs more land, and 22,000 square feet for an RC-2 single-family dwelling26. Setbacks, height and lot coverage also depend on district; ask Community Development to confirm the parcel's standards and allowed use2728293. Subdivision approval goes to the Planning, Zoning and Development Committee and County Board30.

Sycamore31, Sandwich32, Hinckley33, Kirkland34, Maple Park35, Waterman36, Malta37, Shabbona38 set their own zoning. Municipal zoning does not replace Health Department review of private septic systems89.

How do septic and well permits work in DeKalb County?

DeKalb County Health Department septic permits are required for installation, repair or modification; the department says the work must use Illinois-licensed septic installation contractors9. Applications need a soil evaluation and site drawing, and permits expire 1 year after issuance10. All installation components need inspection and final approval before covering11. Published fees are $415 for contractor-installed septic permits, $615 for the homeowner-installed category and $180 for septic inspections; ask Environmental Health how the homeowner category fits the licensed-installer requirement93940. Debit and credit payments carry a 2.25% fee, with a $1.00 minimum41.

Residential systems need evaluation within 3 years of installation, then at least every 5 years; nonresidential systems have a 3-year recurring interval4243. Aerobic treatment units need evaluation and maintenance at least every 6 months; sand filters and surface-discharge ponds at least annually44. USDA rates 0% of county soils as free from severe conventional-drain-field limitations, making site evaluation essential before buying45. Private wells also require a Health Department permit12.

Can you live in an RV or tiny home on land in DeKalb County, Illinois?

Unincorporated DeKalb County allows overnight RV parking in residential neighborhoods, but that provision does not authorize RV residence; required accessory off-street parking facilities cannot be used to store motor homes, campers or other listed vehicles and materials14. A recreational camp with RV or tent pads or electric and water hookups is a special land use in the A-1 Agricultural District, requiring a special use permit and siting that limits conversion of productive farmland15.

We could not confirm general long-term RV residence, temporary private-land camping, tiny-home occupancy or minimum dwelling-size rules; ask Community Development about the parcel and proposed use3. DeKalb County offers an interim special use for one manufactured home per lot for a dependent relative when hardship is established, rather than automatic permission for a second dwelling46.

What are the steps to build a home in DeKalb County, Illinois?

  1. Ask Community Development to identify the parcel's zoning district, permitted use, minimum lot area, setbacks and height controls32627.
  2. If the homesite needs a private well or septic system, apply to the Health Department; a septic application must include a soil evaluation and a scale drawing of the site and proposed facilities1012.
  3. If the parcel lacks a driveway or has only an agricultural field entrance, obtain an access permit from the appropriate road authority47.
  4. Submit the complete building application, attachments and payment in hard copy; electronic submissions are not accepted20.
  5. Wait for permit issuance before starting work, then keep construction inspections current so the permit does not expire648.
  6. Obtain a certificate of occupancy or completion before using or occupying the finished building49.

What should you check before buying land in DeKalb County, Illinois?

Start with zoning and lot legality: district standards govern lot area, setbacks and coverage, and subdivision approval belongs to the Planning, Zoning and Development Committee and County Board262950. Check septic feasibility early because USDA rates 0% of county soils as free from severe conventional-drain-field limitations, and confirm whether a nearby sanitary sewer triggers connection4551. Verify legal road access because a parcel with no driveway or only a field entrance needs an access permit from the appropriate road authority with its building application47. For flood-hazard land, county-regulated work requires the applicable inspections and documentation52. Budget for carrying costs: the effective property-tax rate is about 2.5%, and the median annual property-tax bill is about $5,8895354.

Watch-outs

  • Do not treat the homeowner form as a blanket exemption: it covers an owner-occupant serving as a subcontractor and does not establish that every contractor or code rule is waived13.
  • RV overnight parking and A-1 recreational-camp approval do not establish permission to live in an RV; ask Community Development about residential occupancy14153.
  • An agricultural-exempt structure still needs the county construction card and must satisfy setback and stormwater requirements16.

Sources

  1. Community Development, quoted and re-checked
  2. Community Development, quoted and re-checked
  3. DeKalb County Community Development Department (dekalbcounty.org)
  4. Well & Septic - DeKalb County Health Department, quoted and re-checked
  5. Chapter 53 - Zoning, quoted and re-checked
  6. dekalbcounty.org, quoted and re-checked
  7. Chapter 53 – Zoning, quoted and re-checked
  8. Well & Septic, quoted and re-checked
  9. Well & Septic - DeKalb County Health Department, quoted and re-checked
  10. Chapter 40 - Private Sewage Disposal, quoted and re-checked
  11. Private Sewage Disposal System Application, quoted and re-checked
  12. Well & Septic - DeKalb County Health Department, quoted and re-checked
  13. Building Permit Application Instructions, quoted and re-checked
  14. Chapter 53 – Zoning, quoted and re-checked
  15. Chapter 53 – Zoning, quoted and re-checked
  16. Chapter 14 — Buildings and Building Regulations, quoted and re-checked
  17. Chapter 14 — Buildings and Building Regulations, quoted and re-checked
  18. dekalbcounty.org, quoted and re-checked
  19. Chapter 14 — Buildings and Building Regulations, quoted and re-checked
  20. Application Forms, quoted and re-checked
  21. Ordinance 2024-11 - Amending Chapter 14 Regarding Adopted Building Codes, quoted and re-checked
  22. Sycamore: 9-1-1: Permit Required (DeKalb County), quoted and re-checked
  23. Sandwich: Sec. 18-28. Permit generally (DeKalb County), quoted and re-checked
  24. Village of Hinckley: Village of Hinckley - Permits, Licenses & Forms (DeKalb County), quoted and re-checked
  25. Village of Shabbona: Village of Shabbona construction and permit guidance (DeKalb County), quoted and re-checked
  26. Chapter 53 — Zoning, quoted and re-checked
  27. Chapter 53 — Zoning, quoted and re-checked
  28. Chapter 53 - Zoning, quoted and re-checked
  29. Chapter 53 — Zoning, quoted and re-checked
  30. Community Development, quoted and re-checked
  31. Sycamore: Planning & Zoning Division (DeKalb County), quoted and re-checked
  32. Sandwich: Code of Ordinances, Sec. 98-34. R-2 One-Family Residence District (DeKalb County), quoted and re-checked
  33. Village of Hinckley: Village of Hinckley - Home (DeKalb County), quoted and re-checked
  34. Village of Kirkland: Chapter 154: Zoning (DeKalb County), quoted and re-checked
  35. Village of Maple Park: Code of Ordinances, Title 11, Sec. 11-6-2 R-E Residential Estate District (DeKalb County), quoted and re-checked
  36. Village of Waterman: Waterman, Illinois Code of Ordinances (DeKalb County), quoted and re-checked
  37. Village of Malta: Malta Code of Ordinances, § 70-350, Permitted uses by district (DeKalb County), quoted and re-checked
  38. Village of Shabbona: Shabbona Code of Ordinances, § 30-302—R-1 lot and building requirements (DeKalb County), quoted and re-checked
  39. Well & Septic - DeKalb County Health Department, quoted and re-checked
  40. DeKalb County Health Department, Environmental Health Division (health.dekalbcounty.org)
  41. Well & Septic - DeKalb County Health Department, quoted and re-checked
  42. Chapter 40 - Private Sewage Disposal, quoted and re-checked
  43. Chapter 40 - Private Sewage Disposal, quoted and re-checked
  44. Chapter 40 - Private Sewage Disposal, quoted and re-checked
  45. 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
  46. Chapter 53 — Zoning, quoted and re-checked
  47. Building Permit Application Instructions, quoted and re-checked
  48. Community Development, quoted and re-checked
  49. Chapter 14 — Buildings and Building Regulations, quoted and re-checked
  50. Community Development, quoted and re-checked
  51. Chapter 40 - Private Sewage Disposal, quoted and re-checked
  52. Chapter 53 – Zoning, quoted and re-checked
  53. Effective property tax rate: Bolthole Index county data
  54. 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.

Found land here? Start a Property Hunt →

Compared with neighboring counties

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

RuleDeKalb CountyKane CountyKendall CountyLee CountyOgle CountyDuPage CountyBoone County
Building permitRequiredRequiredRequiredRequiredLimitedRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.County Health Dept.

County locator

DeKalb County in Illinois

35
County map
DeKalb County highlighted among the Illinois counties · colored by Index score

How DeKalb County scores

Seclusion18100% ev.
Self-Sufficiency25100% ev.
Admin Boringness4390% ev.
Durability74100% ev.
Property Autonomy42100% ev.
Carry Cost56100% ev.

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

$299kTypical home
2.5%Property tax
$7,704Land / acre
37.5"Annual rain
3.5% of yrsSevere drought
3.1 / yr (+3)Mid-century 100°F days
13.7 daysMid-century dry spell
1.81" (+7.9%)Mid-century 1-day rain
1.72×Wildfire change factor
100%Forward climate coverage
$1,539Home insurance / yr
3.7% / yrInsurance growth
0.96%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
66,980People within 30 min
12,327,150People within 2 hr
119,831Radius comparison (15 mi)
158.9People / sq mi
0%Federal land
100%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
0 acWorkable land screen
5.5%Wooded land
30.7 tonsBiomass / forest ac
48.9°FAvg temp

Scout DeKalb County

Camp here before you commitBook a few nights nearby on Hipcamp →Already own land here?Earn money hosting campers — get $100 when you become a Hipcamp host →

Some links are affiliate or referral links — we may earn a commission, at no cost to you.

Property hunt

Find land. Bring the promising ones back.

Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.

View your full hunt →
ZillowLand & lotsRealtor.comLand listingsLandSearchRural & vacant land

Each button opens a current land search for DeKalb County. Listing sites control their own results and filters.

Analyze a property
Add setup-cost allowances

Use rough quotes or placeholders. Blank fields count as $0.

Working estimate

—land + entered setup costs
Asking $ / acre
—
Setup allowance
—
All-in $ / acre
—

A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

Before an offer

Parcel due diligence

0/8 checked

Saved properties and checklist progress stay on this device. Bolthole Index does not receive them.

Cities and towns in DeKalb 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: Afton Township · Clinton Township · Town of Cortland · Cortland Township · DeKalb · DeKalb Township · Franklin Township · Genoa · Genoa Township · Kingston Township · Malta Township · Mayfield Township · Milan Township · Paw Paw Township · Pierce Township · Sandwich Township · Shabbona Township · Somonauk Township · Village of Somonauk · South Grove Township · Squaw Grove Township · Sycamore Township · Victor Township

Answers from the rulebook for DeKalb County

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

DeKalb County rules

  • Building permitRequired

    Construction requiring a county building permit in unincorporated DeKalb County.

    • The county reviews and issues all building permits for construction in unincorporated DeKalb County.
    • Agricultural exempt structures require an Agricultural Exempt Construction Card and must comply with setback and stormwater requirements.
    • Permit fees double when work requiring a permit starts before obtaining the permit.
    “Any owner, or owner’s authorized agent who desires to construct, enlarge, alter, repair, move, or demolish a pool or spa or to erect, install, enlarge, alter, repair, remove, convert or replace any system, the installation of which is regulated by this code, or to cause any such work to be performed, shall first make application to the code official and obtain the required permit for the work.”
    One more reviewed finding on this topic
    • Required — Construction requiring building permits in unincorporated DeKalb County.
      “reviews and issues all building permits for construction in unincorporated DeKalb County”
  • Owner-builder exemptionConditional

    Owner-occupant serving as a subcontractor on a County building-permit project.

    • The building application accepts a Homeowner Exemption Contractor Registration Form for an owner-occupant serving as a subcontractor.
    • The cited form does not establish that all contractor or code requirements are waived.
    “a Homeowner Exemption Contractor Registration Form as owner-occupant serving as a subcontractor on the project.”
  • Building code adoptedAdopted (with conditions)

    County-regulated construction in unincorporated DeKalb County.

    • The 2021 International Building Code is adopted except as amended by Chapter 14.
    • Other adopted codes include electrical and state plumbing requirements.

    building code edition: International Building Code 2021 (except as amended in Chapter 14)

    “The International Building Code, 2021, except as amended in this article, is hereby adopted and incorporated by reference as if set forth verbatim in this article.”
    One more reviewed finding on this topic
    • Adopted — International Building Code 2021 for unincorporated DeKalb County, subject to County amendments.
      “The International Building Code, 2021, except as amended in this article, is hereby adopted and incorporated by reference as if set forth verbatim in this article.”
  • InspectionsRequired

    County-regulated construction in unincorporated DeKalb County.

    • The Community Development Department conducts construction inspections.
    • At least one inspection is required during each 180-day period after commencement; no inspection during such a period causes permit expiration.

    minimum inspection frequency: per 1 inspection per 180 days (following commencement of work)

    “A minimum of one inspection of the work shall be required within each 180-day period following commencement of work to ensure that progress is being made.”
    One more reviewed finding on this topic
    • Required — Construction inspections for permitted construction in unincorporated DeKalb County.
      “It shall be the duty of the permit holder or their agent to notify the building official that such work is ready for inspection at least one work day before said inspection.”
  • Certificate of occupancyRequired

    Use, occupancy, or change of occupancy classification of a county-regulated building or structure.

    • A certificate of occupancy or certificate of completion must be issued before use or occupancy.
    • Issuance does not approve violations of the building code or other ordinances.
    “A building or structure shall not be used or occupied, and a change in the existing use or occupancy classification of a building or structure or portion thereof shall not be made, until the building official has issued a certificate of occupancy or certificate of completion therefor as provided herein.”
    One more reviewed finding on this topic
    • Required — Use, occupancy, or change in occupancy classification of buildings and structures governed by Chapter 14.
      “A building or structure or component thereof shall not be used or occupied, and a change in the existing use or occupancy classification of a building or structure or portion thereof shall not be made, until the building official has issued a certificate of occupancy or certificate of completion therefore as provided herein.”
  • County-wide zoningPresent

    County zoning ordinance in unincorporated DeKalb County.

    • The Community Development Department interprets, applies, and enforces the County Zoning Ordinance.
    • Incorporated municipalities may administer their own local zoning rules.
    “Properties in unincorporated DeKalb County are placed in the A-1, Agricultural District”
    One more reviewed finding on this topic
    • Present (with conditions) — Land, buildings, and structures in unincorporated DeKalb County.
      “This Ordinance sets forth regulations that control the use of land, buildings and structures in unincorporated DeKalb County in order to promote public safety, health and general welfare of the citizens.”
  • Local zoningPresent (with conditions)

    County zoning regulation of land, buildings, and structures in unincorporated DeKalb County.

    • The ordinance expressly applies to unincorporated DeKalb County.
    • Incorporated municipalities are outside the stated geographic scope of this county ordinance and may apply their own rules.
    “This Ordinance sets forth regulations that control the use of land, buildings and structures in unincorporated DeKalb County”
  • Zoning districtsPublished (with conditions)

    County zoning districts established by Chapter 53 for unincorporated DeKalb County.

    • The ordinance provides that disconnected or de-annexed territory is automatically zoned A-1 Agricultural District unless and until the County Board designates another district.
    “Sec. 53-D USE DISTRICTS 53-D-1 FP/C, Floodplain/Conservation District”
  • Minimum lot sizeSpecified

    Minimum lot area in county zoning districts.

    • Requirements vary by zoning district and use; examples in the summary table include 40 acres for an A1 farm residence, 1 acre for RC-1 unless a larger parcel is required for a drain field, and 22,000 square feet for an RC-2 single-family dwelling.

    A1 farm residence minimum lot area: 40 acres · RC-1 minimum lot area: >= 1 acre (unless a larger parcel is required to accommodate a drain field) · RC-2 single-family dwelling minimum lot area: 22000 square feet

    “The minimum lot area for all permitted and special uses shall be one acre unless a larger parcel is required by the zoning administrator to accommodate a drain field for a septic system or adequate separation between septic wastes and well water.”
  • SetbacksSpecified

    Setbacks in county zoning districts.

    • Setbacks vary by district and use; the summary table lists different front, side, corner-yard, and rear setbacks.

    front setback examples: 50 ft; 40 ft; 30 ft (varies by zoning district) · side setback examples: 20 ft; 10 ft; 5 ft or 50 ft where abutting a residential district (varies by zoning district)

    “Every building hereafter erected or enlarged shall provide and maintain a minimum setback of 40 feet from the right-of-way of all streets.”
  • Lot coverageSpecified

    Maximum lot coverage in county zoning districts.

    • The summary table provides district-specific maximum lot coverage values.

    maximum lot coverage examples: 20%; 30% percent (varies by zoning district)

    “Lot coverage shall not exceed 20 percent.”
  • Building heightSpecified

    Building height in the County zoning districts shown in Chapter 53.

    • The summary table provides district-specific height controls, including two stories or 40 feet for an applicable district and a standard tied to underlying zoning for another district.
    “Maximum building [...] Same as underlying zoning 2 stories or 40′”
  • Living in an RVAllowed (with conditions)

    A recreational camp using pads or electric and water hookups for recreational vehicles or tents in the unincorporated A-1 Agricultural District.

    • A recreational camp is listed as a special land use in the A-1 Agricultural District and requires issuance of a special use permit under Article 9 procedures and standards.
    • The ordinance defines a recreational camp as a facility with permanent housing facilities such as cabins or with pads or electric and water hookups for recreational vehicles or tents.
    • All A-1 special-use permits must be sited on lands less suitable for commercial agriculture than other agricultural lands in the district or on lands designated for non-agricultural use by the County Comprehensive Plan.
    • The proposed use must minimize conversion of productive agricultural land and be located close to existing agricultural-service facilities whenever possible and appropriate.
    • Other applicable zoning, building, health, septic, and floodplain requirements may also apply.
    “The following uses of land and structures may be permitted upon the issuance of a special use permit in accordance with the procedures and standards contained in Article 9, Special Procedures: [...] y. Recreational camp.”
    2 more reviewed findings on this topic
    • Limited — Overnight parking of recreational vehicles in residential neighborhoods governed by DeKalb County zoning.
      “In residential neighborhoods, overnight parking shall be limited to: passenger vehicles; recreational vehicles; and not more than one commercial vehicle of the light delivery type, not to exceed one ton in manufacturer's rated hauling capacity per dwelling unit.”
    • Limited — Overnight parking of recreational vehicles in residential neighborhoods governed by DeKalb County zoning.
      “In residential neighborhoods, overnight parking shall be limited to: passenger vehicles; recreational vehicles; and not more than one commercial vehicle of the light delivery type, not to exceed one ton in manufacturer's rated hauling capacity per dwelling unit.”
  • Manufactured homesLimited

    Manufactured-home occupancy under county zoning in unincorporated DeKalb County.

    • Chapter 53 provides an interim special use for one manufactured home per lot for financially or physically dependent relatives when hardship is established.
    • Agricultural labor housing may include manufactured homes and is accessory to a farm dwelling on a farm of at least 80 acres, located close to the farm residence.
    • Other manufactured-home occupancy rules were not fully resolved.

    minimum farm size for agricultural labor housing: >= 80 acres (housing must be located in close proximity to the farm residence) · interim manufactured homes per lot: 1 home (financially or physically dependent relative and established hardship)

    “Interim Special Uses may include one manufactured home per lot, intended as living quarters for financially or physically dependent relatives of the occupant of the primary structure, provided the applicant establishes that a hardship exists.”
  • Who permits septicCounty (with conditions)

    Private sewage disposal systems in DeKalb County.

    • The DeKalb County Health Department administers the local program.
    • Installations, repairs, and modifications must be performed by Illinois Department of Public Health licensed septic installation contractors.
    • The county program enforces local and state sewage-disposal requirements.
    “The primary goal of the Sewage Disposal Program is to prevent the transmission of disease caused by exposure to sewage. The program ensures proper installation and repair of all privately owned sewage disposal systems. The program enforces local and state laws and ordinances pertaining to sewage disposal.”
    One more reviewed finding on this topic
    • County (with conditions) — Privately owned sewage disposal systems in DeKalb County.
      “The program ensures proper installation and repair of all privately owned sewage disposal systems. The program enforces local and state laws and ordinances pertaining to sewage disposal.”
  • Septic permitRequired

    Construction, alteration, addition, repair, or modification of private septic tanks and private sewage disposal systems in DeKalb County.

    • The county ordinance applies within county boundaries except in cities, villages, and incorporated towns that provide and enforce rules and regulations at least as stringent as the county article.
    • The permit application must include a scale drawing showing existing and proposed buildings, wells, cisterns, septic tanks, seepage systems, and other sewage facilities.
    • A soil evaluation must be submitted with all permit application submittals.
    • The permit expires one year after issuance.
    • The Health Department may inspect soil investigations, layout, installation stages, and the completed system before covering; the owner or contractor must provide at least 24 hours advance notice before installation of any component.
    • The official Health Department page separately lists both contractor-installed and homeowner-installed septic permit categories; the relationship between that fee classification and the FAQ statement about licensed installers is not explained on the page.

    permit expiration: 1 year after issuance · advance notice before installation: >= 24 hours

    “Yes. All septic system installations, repairs or modifications in DeKalb County must be done by Illinois Department of Public Health Licensed Septic System Installation Contractors.”
    One more reviewed finding on this topic
    • Required — Installation, repair, or modification of septic systems in DeKalb County.
      “Q) Do I need a permit to install or repair my septic system? A) Yes. All septic system installations, repairs or modifications in DeKalb County must be done by Illinois Department of Public Health Licensed Septic System Installation Contractors.”
  • Septic inspectionRequired

    Residential septic tanks serving private sewage disposal systems installed and permitted under 77 Ill. Admin. Code 905.190.

    • The county article applies except in cities, villages, and incorporated towns that provide and enforce rules at least as stringent as the county article.
    • The first evaluation must occur prior to or within three years after installation.
    • The evaluation may be performed by the homeowner, a licensed installation contractor, a licensed Environmental Health Practitioner, an Illinois licensed Professional Engineer, an Illinois Department of Public Health representative, or a Health Department agent.
    • The evaluation must determine whether scum and settled solids exceed 33% of tank liquid capacity.
    • If the threshold exceeds 33%, tanks and compartments must be pumped and maintained.
    • After the first evaluation, evaluation is required at least once every five years; more frequent evaluation or pumping may be needed depending on use.
    • Maintenance records must be retained for the life of the system and made available to the Health Department upon request.

    initial evaluation deadline: <= 3 years after installation (may occur prior to installation-date anniversary) · recurring evaluation interval after first evaluation: <= 5 years (more frequent evaluation may be needed depending on use) · scum and settled solids threshold: > 33 percent of liquid tank capacity (pumping and maintenance required when exceeded)

    “Private sewage disposal system septic tanks serving residential properties shall be evaluated prior to or within 3 years after the date of installation of the system. [...] After the first evaluation, the system shall be evaluated a minimum of once every 5 years.”
    3 more reviewed findings on this topic
    • Required — Private sewage disposal system installation in DeKalb County.
      “It is clearly understood that the owner assumes full responsibility in obtaining the inspection and final approval of the DeKalb County Health Dept on all portions of this sewage disposal system installation prior to covering any portion of the system.”
    • Required — Non-residential septic tanks serving private sewage disposal systems installed and permitted under 77 Ill. Admin. Code 905.190.
      “Private sewage disposal system septic tanks serving non-residential property shall be evaluated within 3 years after the date of installation of the system. [...] After the first evaluation, the system shall be evaluated at minimum once every 3 years.”
    • Required — Aerobic treatment units, sand filters, waste stabilization ponds with surface discharges, and other private sewage disposal systems in DeKalb County.
      “An aerobic treatment unit (ATU) requires evaluation and maintenance at least once every 6 months. [...] Sand filters and waste stabilization ponds with surface discharges require an evaluation”
  • Well permitRequired

    Drilling a well in DeKalb County.

    • The permit must be obtained from the Health Department.
    • The page identifies $100 of the listed well permit fee as a State Statute fee.

    water well permit/inspection/sample fee: 310 USD (The page states that $100 is a well-permit fee under State Statute.)

    “Q) Do I need a permit to drill a well? A) Yes. By law a permit must obtained from the health department.”
  • Mandatory utility hookupConditional

    Connection of new or renovated private sewage systems to available permitted sanitary sewers.

    • Connection is required when the permitted sanitary sewer is within 300 feet of a residential property or qualifying non-residential property, or within 1000 feet of a non-residential property with flow at least 1500 gallons per day.
    • A private sewage system may be installed if a physical barrier or local ordinance prevents connection, or if connection cannot be made with an individual four-inch line.

    residential or qualifying non-residential sewer distance: <= 300 feet (physical barrier or local ordinance) · higher-flow non-residential sewer distance: <= 1000 feet (physical barrier or local ordinance)

    “New or renovated private sewage disposal systems shall not be approved where a sanitary sewer [...] is available for connection.”
  • Agricultural exemptionConditional

    Agricultural exempt structures under Chapter 14.

    • The structure must be defined as an Agricultural Exempt Structure by the Unified Development Ordinance.
    • An Agricultural Exempt Structure Construction Card is required.
    • Building setback requirements of the Unified Development Ordinance apply.
    • All Stormwater Management Ordinance requirements apply.
    “Agricultural Exempt Structures as defined by the DeKalb County Unified Development Ordinance provided they obtain an Agricultural Exempt Structure Construction Card and comply with the building setback requirements of the DeKalb County Unified Development Ordinance and all requirements of the DeKalb County Stormwater Management Ordinance.”
  • Subdividing landRegulated (with conditions)

    Subdivision review and approval in unincorporated DeKalb County.

    • The official Community Development page states subdivision review and approval is the jurisdiction of the Planning, Zoning and Development Committee and the County Board.
    “Subdivision review and approval is the jurisdiction of the Planning, Zoning and Development Committee and the County Board.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivision review and approval in unincorporated DeKalb County.
      “Subdivision review and approval is the jurisdiction of the Planning, Zoning and Development Committee and the County Board.”
  • Driveway accessRequired

    Building-permit applications for parcels in unincorporated DeKalb County with no driveway entrance or only an agricultural field entrance.

    • A copy of the access permit from the appropriate road authority must be submitted when the parcel has no driveway entrance or only an agricultural field entrance.
    • The source does not identify the specific road authority for every parcel.
    “A copy of the access permit from the appropriate road authority”
  • Building in a floodplainRequired

    Land-disturbing activities within floodplain boundaries governed by the FP/C Floodplain/Conservation District in unincorporated DeKalb County.

    • Before land-disturbing activity within floodplain boundaries, the owner or user must obtain a Site Development Permit under Article I of Chapter 30.
    • The Planning Department or County Highway Department may require additional data or engineering studies, which the developer must pay for.
    • The County may retain outside consultant services at the applicant's expense.
    • Floodplain development and filling are permitted only if the stated flood-protection, compensatory-storage, and other regulatory conditions are met.
    “Prior to any land disturbing activities within the boundaries of the floodplain, the property owner or user shall obtain a Site Development Permit in accordance with the requirements of Article I of Chapter 30 of the DeKalb County Code”
  • Permit feesPublished

    DeKalb County Health Department well and septic permits and inspections.

    • The Health Department webpage states the card-processing fee is effective 01/04/2024.
    • A minimum $1.00 card fee applies.
    • The listed septic permit fees distinguish contractor-installed and homeowner-installed categories.

    septic permit - contractor installed: 415 USD · septic permit - homeowner installed: 615 USD · septic inspection: 180 USD · debit or credit card fee: 2.25 percent (minimum $1.00) · septic installer/pumper license: 125 USD

    “Septic Installer/Pumper License | $125.00 Septic Permit- Contractor Installed | $415.00 Septic Permit- Homeowner Installed | $615.00 Real estate Inspection & Site Verification Fees [...] Septic Inspection | $180.00”
    2 more reviewed findings on this topic
    • Published (with conditions) — County Health Department well and septic permits and inspections.
      “Effective 01/04/2024, a credit card fee of 2.25% will be applied to all debit and credit card transactions. A minimum of $1.00 will be applied. [...] Septic Permit- Contractor Installed | $415.00 Septic Permit- Homeowner Installed | $615.00”
    • Published — County building permit fees for construction governed by Chapter 14 in unincorporated DeKalb County, including residential structures and specified sustainable-energy projects.
      “Sec. 14-A-2 Building Permit Fees Any person desiring a building permit as required shall pay a fee according to the following schedule: 1. Residential (one- and two-family) principal structures: a. New: 1. Floor area per square foot .... $0.60”
  • Permit processPublished (with conditions)

    Community Development applications, including building-permit applications, in unincorporated DeKalb County.

    • Applications and required attachments must be submitted in hard copy with payment.
    • Electronic submittals are not accepted.
    • An incomplete application or an application submitted without payment is returned.
    • The page dates these instructions 04/28/22.
    “All applications and forms with any required attachments must be submitted to the Community Development Department in hard copy with payment. No electronic submittals will be accepted. If an application is incomplete or submitted without payment, then the application will be returned. (04/28/22)”

Illinois rules that apply here

  • 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.”
  • Short-term rentalsLimited

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

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

    rental period: < 30 consecutive days

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

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

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

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

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

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

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

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

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

Still unanswered

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

  • Minimum dwelling size — Minimum floor-area or dwelling-size requirements for residential dwellings in unincorporated DeKalb County.
  • Camping on your land — Temporary camping on private land in unincorporated DeKalb County.
  • Tiny homes — Occupancy of a tiny home as a residence or dwelling in unincorporated DeKalb County.
  • Accessory dwellings — Accessory dwelling units in unincorporated DeKalb 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 DeKalb County, Illinois

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

DeKalb County scores 35/100 on the Bolthole Index, a marginal county profile. Its strengths: mixed durability signals. Watch-outs: about 66,980 people within a 30-minute drive and workable self-sufficiency basics (37.5″/yr rainfall).

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

DeKalb County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by DeKalb County Health Department, Environmental Health Division. 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 DeKalb County?

Living in an RV on your own land in DeKalb County is allowed: A recreational camp using pads or electric and water hookups for recreational vehicles or tents in the unincorporated A-1 Agricultural District. A recreational camp is listed as a special land use in the A-1 Agricultural District and requires issuance of a special use permit under Article 9 procedures and standards. The ordinance defines a recreational camp as a facility with permanent housing facilities such as cabins or with pads or electric and water hookups for recreational vehicles or tents. Confirm with the county before relying on it.

How much does land cost in DeKalb County, Illinois?

Land in DeKalb County runs about $7,704 per acre, based on the latest county data.

What is the water situation in DeKalb County?

DeKalb County gets about 37.5" of rain a year, with severe drought in roughly 3.5% of years.

How remote is DeKalb County?

A representative private-land location has about 66,980 people within a 30-minute drive and 12,327,150 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 DeKalb compares in Illinois

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