Bolthole Index

Audubon County, Iowa

Building permits, zoning and land rules in Audubon County, Iowa

50Index Score / 100
#80 of 99 in Iowa

Unincorporated Audubon County, Iowa requires a construction or changed-use permit, issued by the county Zoning Administrator, before any building work begins.1 Audubon County Planning & Zoning also sets zoning approval for unincorporated land, while the cities of Audubon, Exira, Gray, Hamlin, Kimballton and Ross have their own zoning maps.23 Septic permits and well permits, for every address in the county, come from Audubon County Environmental Health.45

At a glance

Building permit
Construction or changed-use permit required before work begins in unincorporated areas; issued by the Zoning Administrator1
Zoning
County zoning applies in unincorporated Audubon County2
Septic
Permit required; Environmental Health also inspects before the system is covered46
RV living
Long-term occupancy rule unconfirmed; ask Planning and Zoning7
Tiny home
No specific occupancy rule confirmed; zoning and permits still apply89
Owner-builder
Own-property work is exempt from contractor registration, not county permits101
Private wells
State permit and county permit both required56

Who to call

Zoning

Audubon County Planning & Zoning

Construction and changed-use permits, zoning, zoning maps and floodplain administration in unincorporated Audubon County

712-634-0110

thenkle@auduboncountyia.gov

318 Leroy St., Audubon, IA 50025

Septic permits

Audubon County Environmental Health

Septic-system and private-well permitting and inspections for Audubon County

641-747-3972

Audubon Co. Environmental Health, %Guthrie Co. Environmental Health, 2002 State St, Guthrie Center, IA 50115

Roads & driveways

Audubon County Engineer's Office

County secondary-road entrance, utility, oversized and overweight permits

712-563-4286

audcoeng@auduboncountyia.gov

2147 Highway 71, Audubon, IA 50025

Online permits →

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

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Do you need a building permit in Audubon County, Iowa?

Yes. Construction and changed-use projects in unincorporated Audubon County require county approval, and no improvements or construction may begin before the permit is approved.1 The applicant must review the zoning ordinance and maps for applicable setbacks and guidelines, include a site map showing where the work will occur, and pay before receiving the approved permit.1

The county's application asks for project and site details and expires 180 days after issuance.11 The county ordinance states that the applicable building code is the state-adopted 2015 International Building Code.12 We could not confirm a general county building-inspection requirement or a certificate of occupancy, so ask Planning and Zoning what reviews apply to the particular structure before finalizing plans.7

Who issues building permits and zoning approval in Audubon County?

Audubon County Planning & Zoning is the first stop for construction and changed-use permits, zoning questions, maps, setbacks and floodplain review in unincorporated Audubon County.7 The office is located in the County Attorney's office, and permit applications may be emailed, delivered or mailed there.1 The county publishes construction/change-use fee materials, and payment is due before the approved permit is released.131

Audubon County does not identify a separate general building department on its permit page. Planning & Zoning should therefore be asked whether a particular project requires inspections, technical plan review or any occupancy document; those general requirements could not be confirmed. Separate site work goes elsewhere: Environmental Health handles septic and well matters, while the County Engineer handles entrances and utility work affecting county secondary roads.614

Does Audubon County have zoning, and who sets it?

Yes. The Audubon County Planning and Zoning Department administers and enforces the comprehensive plan and zoning ordinance for unincorporated Audubon County.2 The ordinance establishes districts and an official zoning map, so a parcel's district—not simply its rural mailing address—controls the applicable uses and dimensional standards.15 Lot-coverage limits also vary by district; one residential provision caps coverage at 30%.16

County zoning applies outside incorporated cities, so land inside a city requires that city's answer; the county Planning page links separate zoning maps for Audubon, Exira, Gray, Hamlin, Kimballton and Ross.3 Septic and well permits stay with Audubon County Environmental Health regardless of city limits.175 Audubon County exempts agricultural land and incidental agricultural buildings from zoning permits while they are used for agriculture, floodplain rules still apply, and a tract under 20 acres is presumed not to be primarily agricultural.18 Do not assume that label covers a house or nonfarm project; describe the actual use to Planning & Zoning and ask for the parcel-specific determination.7

How do septic permits work in Audubon County?

A septic permit is required for a private sewage disposal system in Audubon County, and the county contracts with Guthrie County to run its environmental-health program.417 A private well needs both a state permit and a county permit, with a water test after completion.5 Audubon County Environmental Health says installation or replacement proceeds through a percolation test, permit issuance and inspection before the system is covered.6 Local boards of health take primary responsibility for private systems serving four homes or fewer or fewer than 15 people, while the Iowa Department of Natural Resources leads on larger systems.19

Wastewater feasibility deserves attention before purchase or home design because only 0.2% of mapped county soils avoid a “very limited” rating for a conventional septic drain field.20 That soil rating is not a parcel-level denial, but it supports arranging the site evaluation early. Qualifying sales of buildings with private sewage systems require an inspection by a state-certified inspector, subject to exceptions.2122

Can you live in an RV or tiny home in Audubon County?

We could not confirm a general Audubon County rule allowing or prohibiting long-term residential RV occupancy or private-land camping. Before buying land for that purpose, give Planning & Zoning the parcel location, zoning district, proposed duration and utility plan and ask for a written answer.7 A recreational campground rule or an RV definition does not necessarily answer whether one household may occupy an RV on private land.

A specific tiny-home occupancy rule and a general minimum dwelling size also could not be confirmed. Iowa now requires a county to allow at least one accessory dwelling unit on a lot with a single-family residence in a district where a house is allowed, capped at 1,000 square feet or 50% of the house, whichever is larger.23 A tiny home proposed as a permanent residence still falls within the county's construction-permit and zoning framework.12 Iowa prevents a county from rejecting a residential proposal solely because it is a manufactured home, but the home must meet the same applicable foundation, setback and minimum-square-footage standards as a site-built home on the lot.24

Building a home in Audubon County: what are the steps?

For a home in unincorporated Audubon County, line up the site approvals before construction.

  1. Confirm the parcel's zoning district, allowed residential use, setbacks and floodplain status with Planning & Zoning.1525
  2. Ask the County Engineer whether a new or changed entrance from a county secondary road needs an entrance permit.14 For access to an Iowa primary highway, obtain Iowa DOT district approval before work begins.26
  3. Arrange septic and private-well review with Environmental Health before fixing the house location.6
  4. Prepare the construction or changed-use application with the requested project details, setbacks and site plan.11
  5. Submit the application and wait for approval before any improvement or construction starts.1
  6. Check the county's published construction/change-use fee materials and pay the required amount before the county releases the approved permit.131

What should you check before buying land in Audubon County?

Start with jurisdiction and the official zoning map: verify that the parcel is unincorporated, identify its zoning district and ask whether the intended house, outbuildings or other uses are allowed.215 Check mapped flood exposure because development or substantial improvement in a flood-prone area requires a separate floodplain development permit for each structure or other development.25 Confirm legal access with the County Engineer and wastewater and well feasibility with Environmental Health.146

Countywide physical and cost figures provide context, not parcel answers. About 89.7% of the land has a slope of 15% or less, but only 0.2% of mapped soils avoid severe conventional-drain-field limitations.2720 The cited USDA census measure puts farmland at $9,544 per acre, and the median property-tax bill is $1,353 per year.2829 Obtain a survey, title review, site evaluation and parcel-specific tax estimate before closing.

Watch-outs

  • Do not begin improvements or construction before Audubon County approves the construction or changed-use permit.1
  • Flood-prone sites require a separate floodplain development permit for each structure or other development.25
  • Only 0.2% of mapped soils avoid a severe limitation rating for conventional septic drain fields, so investigate wastewater feasibility early.20
  • A qualifying sale of a building served by a private sewage system requires a septic inspection, subject to exceptions.21
  • Long-term RV living, a general minimum home size and routine building inspections remain unconfirmed; ask Planning & Zoning before committing to plans.7

Sources

  1. Audubon County Zoning Ordinance 2023 - Updated, quoted and re-checked
  2. Planning & Zoning, quoted and re-checked
  3. Planning & Zoning - Audubon County, quoted and re-checked
  4. Audubon County Environmental Health Department, quoted and re-checked
  5. Audubon County Environmental Health Department, quoted and re-checked
  6. Audubon County Environmental Health (auduboncountyia.gov)
  7. Audubon County Planning & Zoning (auduboncountyia.gov)
  8. Audubon County Planning & Zoning (2026 county census)
  9. Audubon County Zoning Ordinance 2023 - Updated (2026 county census)
  10. Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
  11. Audubon County Planning & Zoning, quoted and re-checked
  12. Audubon County Zoning Ordinance, quoted and re-checked
  13. Planning & Zoning, quoted and re-checked
  14. Audubon County Engineer's Office (auduboncountyia.gov)
  15. Audubon County Planning & Zoning, quoted and re-checked
  16. Audubon County Zoning Ordinance - Amended June 2024, quoted and re-checked
  17. Audubon County Environmental Health Department, quoted and re-checked
  18. Audubon County Zoning Ordinance 2023 - Updated, quoted and re-checked
  19. Private Sewage Disposal and Septage, quoted and re-checked
  20. 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
  21. Audubon County Environmental Health Department, quoted and re-checked
  22. Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), quoted and re-checked
  23. legis.iowa.gov (Iowa statewide rule), quoted and re-checked
  24. Iowa Code §335.30, Manufactured and modular homes (Iowa statewide rule), quoted and re-checked
  25. Audubon County Zoning Ordinance 2023 - Updated, quoted and re-checked
  26. Access Management (Iowa statewide rule), quoted and re-checked
  27. Share of land at 15% slope or less: Bolthole Index county data
  28. Farmland value per acre (USDA census): Bolthole Index county data
  29. Median property tax bill: Bolthole Index county data

Written October 9, 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, Audubon County has countywide zoning.

RuleAudubon CountyGuthrie CountyShelby CountyCarroll CountyCass CountyCrawford CountyGreene County
Building permitRequiredRequiredLimitedRequiredRequiredRequiredLimited
County zoningYesYesYesYesYesYesYes
Septic permitsCounty SanitarianCounty Env. HealthCounty Env. Health OfficeCarroll & Crawford County Env. Health Dept.County Env. Health OfficeCarroll & Crawford County Env. Health Dept.County Env. Health

County locator

Audubon County in Iowa

50
County map
Audubon County highlighted among the Iowa counties · colored by Index score

How Audubon County scores

Seclusion57100% ev.
Self-Sufficiency29100% ev.
Admin Boringness50100% ev.
Durability43100% ev.
Property Autonomy51100% ev.
Carry Cost59100% 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 →

$162kTypical home
1.2%Property tax
$9,544Land / acre
35.4"Annual rain
11.9% of yrsSevere drought
5.5 / yr (+5)Mid-century 100°F days
17.3 daysMid-century dry spell
2.02" (+11.4%)Mid-century 1-day rain
1.72×Wildfire change factor
100%Forward climate coverage
$1,673Home insurance / yr
6.1% / yrInsurance growth
0.67%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
17,154People within 30 min
2,541,266People within 2 hr
9,887Radius comparison (15 mi)
12.5People / sq mi
0%Federal land
89.7%Land at 15% slope or less
0.2%Soils rated "not limited" for septic (strict USDA rating)
525 acWorkable land screen
2%Wooded land
49.2 tonsBiomass / forest ac
48.2°FAvg temp

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Cities and towns in Audubon 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.

Audubon · Brayton · Exira · Gray · Kimballton

Answers from the rulebook for Audubon County

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

Audubon County rules

  • Building permitRequired

    Erection, construction, moving in, or structural alteration of a building or structure under the Audubon County zoning ordinance.

    • A Change Use Permit must be obtained from the Zoning Administrator before the listed work starts.
    • The permit is valid for 180 days; if construction is not completed within that period, a new permit must be obtained.
    • A permit fee set by Board of Supervisors resolution must be paid before issuance.

    permit validity: 180 days (If construction is not completed within that time, a new permit must be obtained.)

    “Change Use Permits shall be obtained from the Zoning Administrator before starting or proceeding with the erection, construction, moving in, or the structural alteration of a building or structure.”
    2 more reviewed findings on this topic
    • Required — Construction and changed-use activity regulated by Audubon County zoning in unincorporated areas.
      “For construction/change use permits, NO improvements/construction shall take place prior to permit approval.”
    • Required — Construction and changed-use permits for property governed by the Audubon County zoning ordinance.
      “NO improvements/construction shall take place prior to permit approval.”
  • Building code adoptedAdopted (with conditions)

    Audubon County's applicable building code for county-zoned areas.

    • The ordinance states that the applicable code is the state-adopted 2015 International Building Code.

    building code: 2015 International Building Code

    “Building Code: Audubon County’s applicable building code is the state adopted building code, which is the 2015 International Building Code which was adopted by Iowa Administrative Rule 661-200 and 661-301.”
  • County-wide zoningPresent (with conditions)

    County zoning in unincorporated Audubon County.

    • The county department administers and enforces the county zoning ordinance for unincorporated areas.
    “The Audubon County Planning and Zoning Department administers and enforces the Audubon County Comprehensive Plan and the Audubon County Zoning Ordinance for unincorporated Audubon County.”
    2 more reviewed findings on this topic
    • Present — County zoning in unincorporated Audubon County.
      “The Audubon County Planning and Zoning Department administers and enforces the Audubon County Comprehensive Plan and the Audubon County Zoning Ordinance for unincorporated Audubon County.”
    • Present — Zoning regulation in unincorporated Audubon County.
      “The Audubon County Planning and Zoning Department administers and enforces the Audubon County Comprehensive Plan and the Audubon County Zoning Ordinance for unincorporated Audubon County.”
  • Local zoningVaries (with conditions)

    Aggregate zoning situation across Audubon County, including county zoning in unincorporated areas and separate municipal zoning shown on the county planning page.

    • The county ordinance applies to unincorporated territory; incorporated municipalities may administer their own zoning rules.
    “Audubon County Zoning Map [...] Audubon Zoning Map [...] Exira Zoning Map [...] Gray Zoning Map [...] Hamlin Zoning Map [...] Kimballton Zoning Map [...] Ross Zoning Map”
    One more reviewed finding on this topic
    • Present (with conditions) — Zoning of lands within the unincorporated area of Audubon County.
      “The Audubon County Planning and Zoning Department administers and enforces the Audubon County Comprehensive Plan and the Audubon County Zoning Ordinance for unincorporated Audubon County.”
  • Zoning districtsPublished (with conditions)

    Audubon County zoning districts in unincorporated areas.

    • District boundaries are established by the official zoning map.
    • District-specific regulations, including dimensional standards and permitted uses, apply.
    “to divide the County into districts for such purposes”
    2 more reviewed findings on this topic
    • Published (with conditions) — County zoning districts and zoning maps for unincorporated Audubon County.
      “Documents available for viewing or download:”
    • Published — County zoning districts and maps for unincorporated Audubon County.
      “Documents available for viewing or download: Audubon County Zoning Ordinance [...] Audubon County Zoning Map”
  • Minimum lot sizeSpecified

    Residential parcels and lots under the county subdivision requirements.

    • The minimum depends on available water and sewer service.
    • The ordinance also requires adequate room for wells, onsite wastewater systems, parking, and loading.

    minimum lot size without water and sewer: 2 acres · minimum lot size with well and public sewer: 25000 square feet · minimum lot size with public water and sewer: 10000 square feet

    “a. 2 acres without water and sewer b. 25,000 square feet with well and public sewer c. 10,000 square feet with both public water and sewer”
  • SetbacksSpecified

    Residential parcels and lots under the county subdivision requirements.

    • Front setbacks depend on water and sewer service.
    • Other zoning-district bulk regulations may also apply.

    minimum front setback without water and sewer: 50 feet · minimum front setback with public water and sewer: 35 feet

    “2. Minimum Front Yard Setback a. 50 feet without water and sewer”
  • Lot coverageSpecified

    Lot coverage in applicable residential and other zoning districts in unincorporated Audubon County.

    • Lot-coverage limits vary by district.
    • The ordinance excludes certain unenclosed terraces and porches from lot-coverage calculations subject to stated four-foot lot-line condition.

    maximum lot coverage: 30 percent (example residential district provision)

    “Maximum Lot Coverage 30% of lot 30% of lot 30% of lot”
  • Who permits septicCounty (with conditions)

    Private sewage disposal systems serving four homes or fewer or fewer than 15 people in Audubon County.

    • Local boards of health have primary responsibility for these smaller systems.
    • County activities must comply with Iowa DNR minimum standards.

    homes served: <= 4 homes · people served: < 15 people

    “In Iowa, local boards of health have primary responsibility for regulation of private sewage disposal systems (PSDSs, also known as onsite wastewater treatment systems) serving 4 homes or fewer or less than 15 people”
    One more reviewed finding on this topic
  • Septic permitRequired

    Installation or replacement of private septic systems in Audubon County.

    • A percolation test is performed before the permit is issued according to the county page.
    • Iowa Chapter 69 requires a site evaluation before issuance of a construction permit.
    • Applicable design, siting, and discharge restrictions in Chapter 69 apply.
    “After a percolation test is done, a permit is then issued, and an inspection is done before the system is covered up.”
    One more reviewed finding on this topic
    • Required — Installing or replacing a septic system in Audubon County.
      “After a percolation test is done, a permit is then issued, and an inspection is done before the system is covered up.”
  • Septic inspectionRequired

    New or replacement septic systems in Audubon County.

    • Inspection occurs before the system is covered up.
    • The county Environmental Health Department works with the contractor and homeowner.
    “After a percolation test is done, a permit is then issued, and an inspection is done before the system is covered up.”
  • Well permitRequired

    Drilling private and heat-pump wells in Audubon County.

    • Both a state and county permit are required.
    • A water test is performed after completion as part of the permit.
    • The county environmental-health department works with the well driller for compliance.
    “To drill a well a State and County permit is required. The well driller will work with the Environmental Health Department to see that there is compliance with these rules. After the well is completed, a water test is done as part of the permit. Heat pump wells also require a permit.”
    One more reviewed finding on this topic
  • Agricultural exemptionConditional

    Agricultural land uses and buildings or structures incidental to agricultural use in the unincorporated portion of Audubon County.

    • The exemption applies while the land, farmhouse, farm barn, farm outbuilding, or other building or structure is primarily adapted for agricultural purposes and is used for agricultural purposes.
    • Floodplain regulations or ordinances relating to any structure, building, dam, obstruction, deposits, or excavation in or on the flood plains of a river or stream still apply.
    • No Zoning Permit or Certificate of Zoning Compliance is required for agricultural land use or for construction or use of buildings or structures incidental to agricultural use on the land.
    • A tract smaller than twenty (20) acres is presumed not to be primarily used for agricultural purposes.
    • The person or group claiming the exemption must demonstrate that the property is used for agricultural purposes.
    • Listed non-agricultural uses and buildings must obtain a Construction Compliance Certificate or Occupancy Compliance Certificate, or both, including private golf courses; private recreational lakes or ponds or private clubs, lodges, or associations; business, club, or association stables or kennels; sawmills; gravel and sand pits and rock quarries; tourist campgrounds; private parks; private or commercial hunting preserves; farmstead home occupations; roadside produce stands; and private dumps or waste disposal sites.

    acreage presumption threshold: < 20 acres (If a tract is less than twenty (20) acres, it is presumed not to be primarily used for agricultural purposes.)

    “If a tract of land is less than twenty (20) acres, it shall be presumed that the tract is not primarily used for agricultural purposes.”
    3 more reviewed findings on this topic
    • Available (with conditions) — Division of agricultural land where the use is not changed.
      “The division of agricultural land in which use is not changed shall be exempt from this Ordinance concerning sewer/septic and water requirements.”
    • Conditional — Land, farm houses, farm barns, farm outbuildings, and other primarily agricultural buildings or structures while used for agricultural purposes.
      “If a tract of land is less than twenty (20) acres, it shall be presumed that the tract is not primarily used for agricultural purposes.”
    • Available (with conditions) — Agricultural land uses and incidental agricultural buildings or structures in unincorporated Audubon County.
      “No Zoning Permit or Certificate of Zoning Compliance shall be required”
  • Subdividing landRegulated (with conditions)

    Major and minor subdivisions and qualifying parcel divisions in unincorporated Audubon County.

    • A subdivision includes repeated or simultaneous division into three or more parcels in the ordinance definition.
    • New lots in major or minor subdivisions may not conflict with the ordinance.
    • Subdivision applications require review by the Audubon County Zoning Administrator and County Engineer.
    “A subdivision shall be when a tract of land is subdivided by repeated or simultaneous division into three or more parcels, any of which may be described by metes and bounds description for which no plat of survey is recorded. This section is intended to meet the definition as set forth in Iowa Code § 354.6”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Major, minor, and parcel-split subdivisions under the Audubon County subdivision regulations.
      “No new lot created in either a major or minor subdivision shall conflict with any provisions or portion of this Ordinance.”
  • Driveway accessLimited

    Driveway access for mobile-home parks and subdivision lots under the county ordinance.

    • Mobile-home-park spaces must abut a driveway at least 25 feet wide with unobstructed access to a public street.
    • Minor subdivision lots must front on and have direct access from an existing public or private road.

    mobile-home-park driveway width: >= 25 feet (Must have unobstructed access to a public street.)

    “All mobile home spaces shall abut upon a driveway of not less than twenty-five (25) feet in width which shall have unobstructed access to a public street.”
  • Building in a floodplainRequired

    Construction or other development, including placement of factory-built homes, in county-identified flood-prone areas.

    • A separate floodplain development permit is required for each structure or other development.
    • The Audubon County Zoning Administrator administers the ordinance.
    • Applications require written land and work descriptions, intended use or occupancy, assessed and fair-market values, plans and specifications, and signature by the permittee or authorized agent.
    • No permit may be granted unless the flood-hazard-reduction conditions are satisfied.
    “A floodplain development permit shall be required for all proposed construction or other development, including the placement of factory-built homes”
    One more reviewed finding on this topic
  • Permit feesPublished (with conditions)

    County zoning, construction/change-use, subdivision, and related applications.

    • Fees are payable before permit approval or action.
    • The zoning ordinance states that application fees are established by Board of Supervisors resolution.
    • The county planning page states that credit-card payments include a 2.25% charge.

    credit-card charge: 2.25 percent

    “Payment MUST be made prior to receipt of an approved permit. [...] Payment can be made with a credit card (including the 2.25% charge) via the phone or a check can be dropped off at the Attorney’s office or mailed to that address.”
    One more reviewed finding on this topic
    • Published (with conditions) — Audubon County construction/change-use permit fees.
      “Documents available for viewing or download: Audubon County Zoning Ordinance Construction/Changed Use Permit Application Construction/Changed Use Permit Fees Resolution for Changed Use Permit Fees”
  • Permit processPublished (with conditions)

    Construction and changed-use permit applications under the Audubon County zoning ordinance.

    • The application must identify the location and proposed improvement.
    • All information must be completed or the permit is returned unreviewed.
    • A site map must show the proposed construction location.
    • The permit expires 180 days after issuance.
    • Payment must be made before the approved permit is released.

    permit validity: 180 days

    “This permit expires 180 days from date of issue.”
    One more reviewed finding on this topic
    • Published (with conditions) — Audubon County construction/change-use permits.
      “For construction/change use permits, NO improvements/construction shall take place prior to permit approval.”

Iowa rules that apply here

  • Owner-builder exemptionAvailable (with conditions)

    A person performing work or having work performed on the person's own property, for purposes of Iowa Code chapter 91C contractor registration.

    • The exemption is from being treated as a contractor for purposes of chapter 91C; it is not stated to waive building permits, building-code compliance, inspections, or certificates of occupancy.
    • The separate annual-earnings threshold is less than $2,000, but the own-property exemption is stated independently.
    • A contractor doing business in Iowa must register under chapter 91C unless an applicable statutory exclusion applies.
    “However, a person who earns less than two thousand dollars annually or who performs work or has work performed on the person’s own property is not a contractor for purposes of this chapter.”
  • InspectionsLimited

    Buildings and structures subject to Iowa Code section 103A.10A, including newly constructed state-owned buildings, state-board-of-regents buildings, and certain state-funded buildings.

    • Newly constructed state-owned buildings and structures subject to the state building code are subject to plan review and inspection, excluding renovations and repairs except as provided by statute.
    • Newly constructed buildings owned by the state board of regents are subject to plan review and inspection, excluding renovations and repairs except as provided by statute.
    • State-funded buildings not wholly owned by the state are subject to state plan review and inspection when the governmental subdivision has not adopted the listed codes or does not perform inspections; otherwise they must comply with the local codes and inspections.
    • For ordinary privately owned construction, inspection administration is governed by the applicable local law or ordinance.
    “All newly constructed buildings or structures subject to the state building code, including any addition, but excluding any renovation or repair of such a building or structure, owned by the state or an agency of the state, except as provided in subsection 2, shall be subject to a plan review and inspection by the commissioner or an independent building inspector appointed by the commissioner.”
  • Certificate of occupancyLimited

    Certificates of occupancy or use for buildings subject to Iowa's State Building Code and certificates approving specified buildings, facilities, or installations for licensure.

    • A local building department issues certificates of occupancy or use when required by ordinance.
    • When issued for a building constructed under the state building code, the certificate must certify conformity with the code and is in the form prescribed by the governing body of the governmental subdivision.
    • For facilities governed by Iowa Administrative Code chapter 481.280, if a certificate of occupancy is required for use, it will not be issued until the inspection fee is paid.
    • Chapter 481.280.5 applies to a certificate approving a building, facility, or installation for occupancy upon request from an owner or owner's agency when applicable rules are satisfied and all fees are paid.
    • The state sources do not require a certificate of occupancy for every building statewide.

    additional reinspection fee: 125 USD (Applies for each additional reinspection after the initial reinspection when original deficiencies remain uncorrected.)

    “Issue certificates of occupancy or use, permits, licenses, and other documents in connection with the construction of buildings or structures as may be required by ordinance. (1) A certificate of occupancy or use for a building or structure constructed in accordance with the provisions of the state building code shall certify that the building or structure conforms to the requirements of the code. The certificate shall be in the form the governing body of the governmental subdivision prescribes.”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Minimum dwelling-size standards imposed by county zoning regulations on manufactured homes in Iowa.

    • County zoning under chapter 335 is optional and applies only where the county board of supervisors has adopted it.
    • The local standard must be the same standard applicable to a site-built single-family dwelling on the same lot.
    • The cited provision does not supply a statewide numeric minimum square-footage value.
    “However, a zoning ordinance or regulation shall require that a manufactured home be located and installed according to the same standards, including but not limited to a permanent foundation system, set-back, and minimum square footage, which would apply to a site-built, single family dwelling on the same lot, and shall require that the home is assessed and taxed as a site-built dwelling.”
  • Manufactured homesAllowed (with conditions)

    Placement and residential occupancy of manufactured homes under county zoning statewide in Iowa

    • A county may not disallow the proposed residential structure solely because it is a manufactured home.
    • The home must be located and installed under the same standards applicable to a site-built single-family dwelling on the same lot, including permanent foundation, setback, and minimum square footage standards.
    • The home must be assessed and taxed as a site-built dwelling.
    • A county may not require an incompatible perimeter foundation system and may not require more than one permanent foundation system.
    • Outside a manufactured home community or mobile home park, requirements may ensure visual compatibility of the permanent foundation system with surrounding residential structures.
    • Recorded restrictive covenants are not abrogated.
    • Counties may regulate transportation, water, sewerage, and other land development; the statute also bars width standards greater than twenty-four feet and certain design standards when federal standards are met.

    maximum mandated width standard: <= 24 feet (if the housing otherwise complies with 42 U.S.C. §5403)

    “A county shall not adopt or enforce zoning regulations or other ordinances which disallow the plans and specifications of a proposed residential structure solely because the proposed structure is a manufactured home. However, a zoning ordinance or regulation shall require that a manufactured home be located and installed according to the same standards, including but not limited to a permanent foundation system, set-back, and minimum square footage, which would apply to a site-built, single family dwelling on the same lot, and shall require that the home is assessed and taxed as a site-built dwelling.”
  • Accessory dwellingsAllowed (with conditions)

    City regulation of accessory dwelling units statewide in Iowa, within a zoning district where a single-family residence is an allowed principal use

    • At least one accessory dwelling unit must be allowed on the same lot as a single-family residence.
    • The accessory dwelling unit must comply with applicable building regulations under chapter 103A.
    • The unit may not exceed 1,000 square feet or 50 percent of the size of the single-family residence, whichever is larger; unfinished basements are excluded from the size calculation.
    • Historic-building-code restrictions, deed restrictions, and common-interest-community rules may limit or prohibit construction or use.
    • A manufactured or mobile home used as the accessory dwelling unit must be converted to real property by placement on a permanent foundation and assessed for real-estate taxes under section 435.26.
    • A historic-preservation area may regulate the unit to the extent the city or commission determines it incongruous and records its reasons.
    • Effective July 1, 2026.

    maximum accessory dwelling unit size: 1,000 square feet or 50% of the single-family residence, whichever is larger (unfinished basements excluded from the size calculation)

    “A city shall allow a minimum of one accessory dwelling unit on the same lot as a single family residence within a zoning district where a single family residence is an allowed principal use, in accordance with the following conditions:”
    One more reviewed finding on this topic
    • Allowed (with conditions) — County regulation of accessory dwelling units statewide in Iowa, within a zoning district where a single-family residence is an allowed principal use
      “A county shall allow a minimum of one accessory dwelling unit on the same lot as a single family residence within a zoning district where a single family residence is an allowed principal use, in accordance with the following conditions:”
  • county zoning authorityGeneral

    Iowa counties may adopt zoning ordinances for land and structures within the county but outside the corporate limits of any city.

    • Chapter 335 applies to any Iowa county at the option of its board of supervisors.
    • The zoning power is subject to Iowa Code section 335.2: ordinances generally do not apply to agricultural land, farm houses, farm barns, farm outbuildings, or other structures primarily adapted for agricultural purposes while so used, except that ordinances may apply to structures, buildings, dams, obstructions, deposits, or excavations in or on river or stream floodplains.
    • A county may not require an application, approval, or fee for an ordinance to be deemed inapplicable to qualifying agricultural land or structures.
    • A county may not regulate, restrict, or prohibit the location of permanent buildings or temporary structures used for consumer-fireworks sales pursuant to section 10A.519 in locations zoned commercial or industrial.
    • The board of supervisors may divide the county into zoning districts, and regulations may differ among districts.
    • Regulations and restrictions require public-hearing and notice procedures under sections 335.6 and 331.305; district boundaries must identify the affected township and section and, if possible, streets or roads.
    • Energy-conservation and solar-access objectives do not require zoning in a county that did not have zoning before July 1, 1981.
    “applicable to any county [...] at the option of the board of supervisors [...] outside of the corporate limits of any city.”
  • county building authorityGeneral

    Iowa counties may adopt, administer, and enforce county building codes and may administer and enforce the state building code for buildings, including residential construction, in county jurisdiction outside incorporated municipalities, subject to statutory limitations.

    • A county building code may not apply within the incorporated area of a city except at the city's option.
    • A county building code may not apply within a city's two-mile limit under Iowa Code §414.23 to the extent the city has adopted a building code within that two-mile limit.
    • A county building code may not apply to farm houses or other farm buildings primarily adapted for agricultural purposes while so used or under construction for that use.
    • Administration and enforcement are conducted as prescribed by local law or ordinance.
    • The state building code applies in a governmental subdivision only after the governing body adopts an ordinance accepting it and files a certified copy with the commissioner; the ordinance fixes the effective date, which must be no more than six months after adoption.
    • A local building department may prohibit commencement of construction until a permit is issued after showing compliance with applicable state building-code provisions.
    • Thermal-efficiency energy-conservation standards apply to construction containing heated or cooled enclosed space, but the commissioner must provide appropriate exceptions where applying an energy-conservation requirement would be impractical.
    “The power to adopt, administer, and enforce the state building code shall be exercised in accordance with chapter 103A. The power to adopt by ordinance, administer, and enforce a county building code, is subject to the following restrictions: a. A county building code shall not apply within the incorporated area of a city except at the option of the city, and shall not apply within a city’s two-mile limit referred to in section 414.23, to the extent that the city has adopted a building code within the two-mile limit. b. A county building code shall not apply to farm houses or other farm buildings which are primarily adapted for use for agricultural purposes, while so used or under construction for that use.”

Still unanswered

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

  • Living in an RV — Residential or long-term recreational-vehicle occupancy on private land.
  • Camping on your land — Temporary camping on private land outside an established campground.
  • Tiny homes — Tiny-home occupancy in unincorporated Audubon County.
  • Off-grid sanitation — Off-grid sanitation systems in Audubon County.
  • Mandatory utility hookup — Water or sewer connection requirements for residential development.
1 more unanswered
  • Short-term rentals

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 Audubon County, Iowa

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

Audubon County scores 50/100 on the Bolthole Index, a solid county profile. Its strengths: higher long-term carry cost. Watch-outs: workable self-sufficiency basics (35.4″/yr rainfall).

Do you need a building permit in Audubon County, Iowa?

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

How much does land cost in Audubon County, Iowa?

Land in Audubon County runs about $9,544 per acre, based on the latest county data.

What is the water situation in Audubon County?

Audubon County gets about 35.4" of rain a year, with severe drought in roughly 11.9% of years.

How remote is Audubon County?

A representative private-land location has about 17,154 people within a 30-minute drive and 2,541,266 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 Audubon compares in Iowa

Compare side-by-side →See all 99 Iowa counties ranked →