Bolthole Index

Harrison County, Iowa

Building permits, zoning and septic rules in Harrison County, Iowa

60Index Score / 100
#31 of 99 in Iowa

Unincorporated Harrison County, Iowa requires a building permit for new construction, reconstruction, or moving a structure on rural property1. Harrison County administers rural zoning; Missouri Valley issues its own building permits inside city limits23. Harrison County Environmental Health handles private septic systems countywide, and applicable private sewage-disposal or water-supply permits must precede the rural building permit45.

At a glance

Building permit
Required for new construction, reconstruction, or movement of any structure in rural Harrison County1
Zoning
County-administered in rural, unincorporated areas; incorporated municipalities may have separate rules6
Septic permits
Harrison County Environmental Health Department; required before a building permit for new construction using private sewage disposal47
Owner-builder
A person performing work on their own property is not treated as a contractor under Iowa's registration law, but building permits and codes still apply8
Manufactured homes
Counties can't reject a manufactured home's plans solely because it's manufactured, but it must meet the same foundation, setback and size standards as a site-built home9
Accessory dwelling units
Iowa counties must allow at least one ADU on an eligible single-family lot, up to 1,000 square feet or 50% of the main home’s size, whichever is larger10
Private wells
A county permit covers new and reconstructed wells; new wells require on-site review and approval11
Septic soil difficulty
44.1% of county soils have no severe limits for a conventional drain field12

Who to call

Building permits

Harrison County Environmental Health, Planning & Zoning

Building permits, zoning administration and appeals, E911 rural addressing, floodplain (F-1) district information, and septic (private sewage disposal) and private well permits and inspections for unincorporated Harrison County

(712) 644-2302

mpitt@harrisoncounty.iowa.gov

111 N. 2nd Avenue, 2nd Floor Courthouse, Logan, IA 51546

Roads & driveways

Harrison County Engineer's Office

County secondary roads and roadway-use permits, including driveway and field-entrance approvals

(712) 644-3140

301 North 6th Ave, Logan, IA 51546

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 Harrison County means bringing your own water and power. The kit we’d start with:

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

Harrison County requires a building permit for new construction, reconstruction, or movement of a structure on rural, unincorporated property1. Planning & Zoning provides applications for new construction, remodeling, and repairs; the county takes no action until the filing fee is paid in full513. Ask the Zoning Administrator for the current building-permit fee; the published $100 fee is for a Board of Adjustment appeal13. A written appeal must state the reasons and be filed within 30 working days after the final decision5. Owner-builders working or arranging work on their own property are excluded from Iowa’s contractor-registration definition, but that exemption does not waive county building, zoning or septic permits8. Harrison County issues occupancy compliance certificates when required by its zoning ordinance; ask the Administrator whether your project needs one14.

Who issues building permits in Harrison County, Iowa?

Harrison County Environmental Health, Planning & Zoning handles rural building applications at 111 N. 2nd Avenue, 2nd Floor Courthouse, Logan, IA 51546; call (712) 644-230215. Office hours are Monday through Friday, 7:00 a.m. to 3:30 p.m.15. Submit a legal description or plat of survey and identify the area on a digital photo for a rural zoning determination15. Inside Missouri Valley, the city requires its own building permits before work starts; private septic administration remains with Harrison County Environmental Health34. Missouri Valley adds a surcharge of 100% of the usual permit fee when covered work starts before the necessary permits are established3.

Does Harrison County have zoning?

Harrison County administers zoning in rural, unincorporated areas; incorporated municipalities may have separate local rules62. Qualifying agricultural land and structures are generally exempt from Iowa county zoning while used for agricultural purposes, although county rules can still apply in river or stream floodplains16. Harrison County designates certain areas Floodplain District F-1, with special regulations addressing flood danger and development that could obstruct, contain, or divert floodwater17. Special-exception uses depend on the zoning district, so ask Planning & Zoning for the parcel’s permitted uses and applicable district standards18. Rural subdivisions are regulated and reviewed by the Zoning Commission, but we could not confirm the detailed subdivision standards19. For setbacks, submit a legal description or plat of survey to Planning & Zoning; we could not confirm numerical distances20.

How do septic permits work in Harrison County?

Harrison County Environmental Health licenses and inspects private septic-system construction4. New private septic construction requires a site review, an inspection before any portion is covered, and a final inspection with a location diagram kept on file21. New rural construction using private sewage disposal must receive its sewage-disposal permit before the building permit, so an off-grid plan does not bypass sanitation review22. Buyers may request a county on-site evaluation of an existing rural septic system before purchase; that optional county service is different from the required inspections for new construction21. Iowa also requires qualifying private systems serving 1–4 dwelling units to be inspected before ownership transfers; the tank generally must be opened and pumped unless properly pumped within the prior 3 years, and an inspection remains valid for 2 years23. Only 44.1% of Harrison County soils lack severe limits for a conventional drain field, so get the county site review before fixing the house location or system design1221.

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

We could not confirm whether full-time RV occupancy or temporary camping is allowed on private rural land in Harrison County. Ask Planning & Zoning about the intended duration, utilities, septic plan, and zoning district before buying or moving an RV onto a parcel. Iowa prevents a county from rejecting a residential structure solely because it is a manufactured home, but the home remains subject to the same applicable foundation, setback, and minimum-area standards as a site-built single-family dwelling on the same lot9. Since July 1, 2026, an Iowa county must allow at least one accessory dwelling unit on a single-family lot in a district where a single-family residence is an allowed principal use; the unit may be up to 1,000 square feet or 50% of the main residence, whichever is larger10. Harrison County's specific tiny-home, minimum-size, and setback rules remain unconfirmed, so obtain a parcel-specific determination from Planning & Zoning before ordering a unit.

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

  1. Submit a legal description or plat of survey to Planning & Zoning to establish the parcel’s district, setbacks, subdivision status and any Floodplain District F-1 designation201917.
  2. Arrange driveway or field-entrance approval with the County Engineer for county-road access; Iowa DOT approval must precede work on an entrance to a primary highway2425.
  3. Obtain applicable private sewage-disposal or water-supply permits before the building permit; new wells require county on-site review and approval511.
  4. Obtain the building application from Planning & Zoning and pay the filing fee in full513. Ask that office which building-code edition and structural inspections apply; we could not confirm either.
  5. Arrange septic site review, inspection before any portion is covered, and final inspection with a location diagram retained by Environmental Health21.
  6. Ask the Zoning Administrator whether your project requires an occupancy compliance certificate14.

What should you check before buying land in Harrison County?

Confirm the zoning district, setbacks, subdivision standards, and any Floodplain District F-1 designation before relying on a site plan18201917. If the property has an existing septic system, ask Harrison County for an on-site evaluation before closing4. Iowa separately requires a time-of-transfer inspection for qualifying private septic systems23. Only 44.1% of county soils lack severe limits for a conventional drain field, so verify the actual homesite12. Harrison County requires permits for new and reconstructed private wells, plus on-site review and approval for new well construction26. A driveway or field entrance connecting to a county road requires approval from the County Engineer's Office24. The effective property-tax rate is about 1.3%, with a median annual bill of about $2,2142728.

Watch-outs

  • Harrison County, Iowa is not the same as other Harrison Counties in other states; confirm you're looking at the county seated in Logan, Iowa before relying on any office contact or link15.
  • A private sewage-disposal or private-water permit must be issued before Harrison County will issue the building permit for new construction using either system5.
  • Full-time RV occupancy, temporary camping, tiny-home occupancy, rural building inspections, and the locally adopted building-code edition remain unconfirmed; ask Harrison County Planning & Zoning before committing to a plan15.

Sources

  1. Environmental Health, Planning & Zoning, quoted and re-checked
  2. Environmental Health, Planning & Zoning, quoted and re-checked
  3. Missouri Valley: official source (Harrison County), quoted and re-checked
  4. Environmental Health, Planning & Zoning - Harrison County, Iowa, quoted and re-checked
  5. Environmental Health, Planning & Zoning, quoted and re-checked
  6. Environmental Health, Planning & Zoning, quoted and re-checked
  7. Environmental Health, Planning & Zoning - Harrison County, Iowa, quoted and re-checked
  8. Iowa Code § 91C.1 — Definition — exemption — combined registration and licensing process for plumbers and mechanical professionals, quoted and re-checked
  9. Iowa Code §335.30, Manufactured and modular homes (Iowa statewide rule), quoted and re-checked
  10. legis.iowa.gov (Iowa statewide rule), quoted and re-checked
  11. harrisoncounty.iowa.gov, quoted and re-checked
  12. 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
  13. Environmental Health, Planning & Zoning, quoted and re-checked
  14. Environmental Health, Planning & Zoning, quoted and re-checked
  15. Harrison County Environmental Health, Planning & Zoning (harrisoncounty.iowa.gov)
  16. Iowa Code 2026, Chapter 335 — County Zoning (Iowa statewide rule), quoted and re-checked
  17. harrisoncounty.iowa.gov, quoted and re-checked
  18. Environmental Health, Planning & Zoning, quoted and re-checked
  19. Environmental Health, Planning & Zoning, quoted and re-checked
  20. Environmental Health, Planning & Zoning - Harrison County, Iowa, quoted and re-checked
  21. Environmental Health, Planning & Zoning, quoted and re-checked
  22. Environmental Health, Planning & Zoning - Harrison County, Iowa, quoted and re-checked
  23. Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), quoted and re-checked
  24. Engineer - Harrison County, Iowa, quoted and re-checked
  25. Access Management (Iowa statewide rule), quoted and re-checked
  26. Environmental Health, Planning & Zoning - Harrison County, Iowa, quoted and re-checked
  27. Effective property tax rate: Bolthole Index county data
  28. Median property tax bill: Bolthole Index county data

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

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

RuleHarrison CountyMonona CountyShelby CountyPottawattamie CountyCrawford CountyAudubon CountyMills County
Building permitRequiredRequiredLimitedRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Env. Health Dept.County Env. Health/ZoningCounty Env. Health OfficeCounty Public HealthCarroll & Crawford County Env. Health Dept.County SanitarianCounty Env. Health

County locator

Harrison County in Iowa

60
County map
Harrison County highlighted among the Iowa counties · colored by Index score

How Harrison County scores

Seclusion61100% ev.
Self-Sufficiency43100% ev.
Admin Boringness48100% ev.
Durability54100% ev.
Property Autonomy51100% ev.
Carry Cost60100% 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 →

$232kTypical home
1.3%Property tax
$8,414Land / acre
32.6"Annual rain
14.9% of yrsSevere drought
7.7 / yr (+6.9)Mid-century 100°F days
19.4 daysMid-century dry spell
1.67" (+5.2%)Mid-century 1-day rain
1.65×Wildfire change factor
100%Forward climate coverage
$1,934Home insurance / yr
3.9% / yrInsurance growth
1.08%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
6,428People within 30 min
1,853,137People within 2 hr
14,570Radius comparison (15 mi)
21.1People / sq mi
1.1%Federal land
79.1%Land at 15% slope or less
44.1%Soils rated "not limited" for septic (strict USDA rating)
193,705 acWorkable land screen
10%Wooded land
43.6 tonsBiomass / forest ac
49.7°FAvg temp

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Cities and towns in Harrison 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: Dunlap · Little Sioux · Logan · Magnolia · Modale · Mondamin · Persia · Pisgah · Woodbine

Answers from the rulebook for Harrison County

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

Harrison County rules

  • Building permitRequired

    New construction, reconstruction, or movement of any structure in rural Harrison County.

    • A private sewage-disposal or water-supply permit must be issued before the building permit when applicable.
    • The county page states that county Planning & Zoning handles permits for rural areas.
    “Permits to build are required for any new construction, reconstruction, or movement of any structure on a piece of property. Harrison County Planning & Zoning issues, sites, reviews, and approves all permits for rural areas in Harrison County. Permit to build applications for new construction, remodeling, or repairs are available from the Planning & Zoning Department. These forms contain information necessary to properly process your request. Also, if your new construction will be using a private sewage disposal or water supply, you will need to have a permit issued before the building permit.”
    One more reviewed finding on this topic
    • Required — New construction, reconstruction, or movement of any structure in rural Harrison County.
      “Permits to build are required for any new construction, reconstruction, or movement of any structure on a piece of property.”
  • Certificate of occupancyLimited

    Occupancy-compliance certificates for construction, reconstruction, alteration, location, or use governed by the county zoning ordinance.

    • The certificate is issued only when required by the ordinance.
    • Current fees must be obtained from the Zoning Administrator.
    • The page does not identify every triggering condition.
    “The Zoning Administrator is directed to issue a building permit and/or occupancy compliance certificate as required by this ordinance for proposed construction, reconstruction, alteration, location or use. There are no fees charged to the State of Iowa, the United States Government, or any other political subdivision. Contact the Zoning Administrator for current fees.”
    One more reviewed finding on this topic
    • Limited — Occupancy compliance certificates under the county zoning ordinance.
      “The Zoning Administrator is directed to issue a building permit and/or occupancy compliance certificate as required by this ordinance”
  • County-wide zoningPresent (with conditions)

    Zoning and building regulation in rural and unincorporated Harrison County.

    • The county page states that rural land inquiries are governed by the Harrison County Zoning Ordinance.
    • Incorporated municipalities may have separate rules.

    ordinance adoption date: February 1996

    “The Zoning Administrator will make a determination, under the rules of the Harrison County, Iowa Zoning Ordinance. The Harrison County, Iowa Zoning Ordinance was adopted in February 1996 and provides the rules and procedures for zoning and building in Harrison County.”
    One more reviewed finding on this topic
    • Present (with conditions) — County zoning and building regulation in rural, unincorporated Harrison County.
      “All rural land inquiries should be made to the Planning and Zoning Department.”
  • Local zoningPresent (with conditions)

    County zoning for rural and unincorporated property.

    • Incorporated municipalities may have separate local rules; this claim is limited to the county-administered rural area.
    “The Harrison County, Iowa Zoning Ordinance was adopted in February 1996 and provides the rules and procedures for zoning and building in Harrison County.”
  • Zoning districtsPublished (with conditions)

    County zoning districts identified for rural and unincorporated Harrison County.

    • The county page identifies Floodplain District F-1 and states that floodplain maps are available for reference.
    • The page does not reproduce the complete district schedule.

    district: F-1 (Floodplain District)

    “The Planning & Zoning Department has flood plain maps for the entire county. These maps are published by the Federal Emergency Management Agency (FEMA) National Flood Insurance Program and are used to rate property in flood prone areas. [...] Certain areas in Harrison County have been zoned as Floodplain Districts (F-1).”
    One more reviewed finding on this topic
    • Partial — County zoning districts in unincorporated Harrison County.
      “Special Exception uses are listed in the district regulations for each zoning district.”
  • SetbacksSpecified

    Building setbacks for rural Harrison County properties.

    • A legal description or plat of survey must be submitted for property-specific zoning information.
    • The page does not provide numerical setback distances.
    “Information provided includes the zoning of a property, building setbacks, and subdivision regulations. All rural land inquiries should be made to the Planning and Zoning Department. A legal description or plat of survey must be submitted and the area identified on a digital photo.”
  • Who permits septicCounty (with conditions)

    Private septic permitting and inspection administration in Harrison County.

    • The department refers to compliance with both state and county standards.
    • The page concerns private septic systems.
    “Homeowners interested in constructing a home away from a city sewer system may contact the Environmental Health Department for information regarding the licensing and inspection of septic system construction. County residents interested in having an existing septic system inspected for compliance with public health standards prior to the purchase of a rural property may also call for an on-site evaluation of the septic system.”
  • Septic permitRequired

    Private sewage-disposal systems associated with new construction away from city sewer.

    • A permit must be issued before the building permit when private sewage disposal is used.
    • The rule applies when the new construction uses a private sewage-disposal system.
    “Also, if your new construction will be using a private sewage disposal or water supply, you will need to have a permit issued before the building permit.”
  • Septic inspectionRequired

    New private septic construction.

    • Site review is required to assure the location meets state and county standards.
    • An inspection is required during construction before any portion of the system is covered.
    • A final inspection is required, with a location diagram retained by the department.
    “The following inspections are required for new construction: Site review to assure your location meets state and county standards. During the construction process, prior to covering any portion of the system. Final inspection, the administrator will give your system a final inspection and will draw a diagram of its exact location to be kept on file in the department.”
    One more reviewed finding on this topic
  • Off-grid sanitationLimited

    New rural construction using private sewage disposal rather than city sewer service.

    • A private sewage-disposal permit must be issued before the building permit.
    • New septic construction is subject to required county inspections, including site review, construction-stage inspection before covering the system, and final inspection.
    “Also, if your new construction will be using a private sewage disposal or water supply, you will need to have a permit issued before the building permit.”
  • Well permitRequired

    New or reconstructed private wells in Harrison County.

    • On-site review and approval is required for all new well construction.
    • The page also describes water-well certification associated with property transfers.
    “Other services offered are well permits for new well construction & reconstructed wells and water well certification associated with property transfers. On–site review and approval is required for all new well construction.”
    One more reviewed finding on this topic
    • Required — New and reconstructed private wells in Harrison County.
      “Other services offered are well permits for new well construction & reconstructed wells”
  • Subdividing landRegulated (with conditions)

    Subdivision applications and regulations in rural Harrison County.

    • The Zoning Commission reviews and recommends on subdivision applications.
    • The Board of Supervisors may overturn a Zoning Commission decision.
    “The Commission serves in an advisory role to the Board, reviewing and making recommendations on implementation and updating the Harrison County Zoning Ordinance. This includes the zoning and rezoning or land and applications for subdivisions. The Harrison County Board of Supervisors can overturn a decision made by the Zoning Commission.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivision applications in rural Harrison County.
      “The Commission serves in an advisory role to the Board, reviewing and making recommendations on implementation and updating the Harrison County Zoning Ordinance.”
  • Driveway accessRequired

    Driveways and field entrances connecting to Harrison County roads.

    • The County Engineer’s Office issues permits pertaining to roadway use and approves driveways and field entrances.
    “All permits pertaining to use of the roadway are issued from the office.”
  • Building in a floodplainLimited

    Development in Harrison County Floodplain District F-1 areas.

    • The F-1 district applies to certain county properties in areas where special regulations are necessary.
    • The regulations address minimizing danger from flood waters and protecting floodplains from encroachments or developments that would obstruct, contain, or divert flood waters.

    floodplain district: F-1

    “Certain areas in Harrison County have been zoned as Floodplain Districts (F-1). The F-1 district is designed and intended to be applied by the County to properties which lie within areas where special regulations are necessary in order to minimize the danger to life and property which results from flood waters. These regulations are further intended to protect the floodplain from encroachments or developments which would obstruct, contain, or divert the passage of flood waters.”
    One more reviewed finding on this topic
    • Limited — Development in county-designated Floodplain District F-1 areas.
      “Certain areas in Harrison County have been zoned as Floodplain Districts (F-1).”
  • Permit feesPublished (with conditions)

    County planning and zoning permit application fees.

    • A filing fee is charged for each application.
    • No action is taken until the required fee is paid in full.
    • No fees are charged to the State of Iowa, the United States Government, or another political subdivision.
    • The page directs applicants to contact the Zoning Administrator for current fees.
    • An appeal fee of $100.00 is stated for a Board of Adjustment appeal.

    appeal filing fee: 100 USD (paid when the notice of appeal is filed)

    “A filing fee shall be charged for each application to assist in deferring the cost of administrative review and legal publication. The applicant shall be held responsible for submitting the required filing fees upon submission of the completed application. No action shall be taken on any application until the required fee is paid in full. [...] A fee of $100.00 should be paid to the Administrator at the time of the notice of appeal is filed.”
    One more reviewed finding on this topic
    • Variable (with conditions) — County zoning and building-permit applications in rural Harrison County.
      “A filing fee shall be charged for each application to assist in deferring the cost of administrative review and legal publication.”
  • Permit processPublished (with conditions)

    Rural Harrison County building and zoning permit process.

    • Applications are available from Planning & Zoning for new construction, remodeling, or repairs.
    • Private sewage-disposal or water-supply permits must precede the building permit when applicable.
    • A filing fee must be paid before action is taken.
    • Appeals must be filed within 30 working days after the final decision and include written reasons; the stated appeal fee is $100.

    appeal deadline: 30 working days (After the date of the final decision.) · appeal fee: 100 USD (Paid when the notice of appeal is filed.)

    “Permit to build applications for new construction, remodeling, or repairs are available from the Planning & Zoning Department.”
    One more reviewed finding on this topic
    • Partial — Planning and zoning permit applications for rural Harrison County.
      “Permit to build applications for new construction, remodeling, or repairs are available from the Planning & Zoning Department. These forms contain information necessary to properly process your request. Also, if your new construction will be using a private sewage disposal or water supply, you will need to have a permit issued before the building permit.”

Iowa rules that apply here

  • Owner-builder exemptionConditional

    Owner-builders performing or arranging construction on their own property in Harrison County, under Iowa Code chapter 91C.

    • The exemption is from being treated as a contractor for purposes of Iowa Code chapter 91C; it is not a waiver of Harrison County zoning or building-permit requirements.
    • A person earning less than $2,000 annually from construction is also outside the chapter’s contractor definition.
    • A self-employed contractor who does not pay more than $2,000 annually to employ other persons and does not work with or for other contractors in the same phases of construction is exempt from chapter 91C fee requirements.

    annual construction earnings threshold: < 2000 USD (The statute also excludes a person who performs work or has work performed on the person’s own property, regardless of this earnings threshold.) · annual payments to employees for fee exemption: <= 2000 USD (The contractor must also be self-employed and not work with or for other contractors in the same phases of construction.)

    “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.”
    2 more reviewed findings on this topic
  • Building code adoptedPartial

    The Iowa State Building Code, including the 2024 International Building Code adopted by reference with Iowa amendments, applies statewide to state-owned buildings and structures, qualifying state-funded construction, certain cities over 15,000 that lack a substantially equivalent local building code, and governmental subdivisions that accept the code by ordinance. Factory-built-structure provisions apply throughout Iowa.

    • In a governmental subdivision, the code generally applies only after the governing body enacts an ordinance accepting applicability and files a certified copy with the commissioner.
    • The local ordinance fixes the effective date, which must be no more than six months after adoption.
    • A governmental subdivision may withdraw after one year by ordinance, following the required public hearing and written notice; the withdrawal date must be at least 180 days after ordinance adoption, and previously issued permits are unaffected.
    • The state building code applies to state-owned buildings and structures and to newly constructed buildings and structures paid for in whole or in part with state-appropriated money but not wholly state-owned.
    • Cities with populations over 15,000 that lack a local building code substantially in accord with nationally recognized standards must enforce the state building code.
    • Factory-built-structure provisions apply throughout the state; an approved factory-built structure is deemed compliant with building regulations applicable to its manufacture and installation and is exempt from other state or local building regulations, subject to the statutory exceptions concerning professional engineering and architecture and manufactured homes.
    • The current administrative rule adopts the 2024 International Building Code by reference with amendments; detached one- and two-family dwellings, certain townhouses not more than three stories, and their accessory structures instead comply with the amended International Residential Code.

    adopted model building code: 2024 International Building Code (Adopted by reference with Iowa amendments.) · current administrative-rule effective date: 2025-09-10 (Iowa Administrative Code Chapter 481.301 source identifies ARC 9474C as effective September 10, 2025.) · local ordinance effective-date limit: <= 6 months after adoption · local withdrawal waiting period: >= 1 year after code became applicable (A governmental subdivision may withdraw only after this period has elapsed.) · withdrawal effective-date minimum: >= 180 days after ordinance adoption (Previously issued permits remain unaffected.)

    “The state building code shall be applicable: [...] In each governmental subdivision where the governing body has enacted an ordinance accepting the application of the code.”
  • 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.”
  • 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.”
  • Minimum lot sizeDistrict specific (with conditions)

    Minimum-lot-size requirements administered through county zoning districts in Iowa, where county zoning has been adopted.

    • County zoning is optional under §335.1.
    • Local zoning districts may have different regulations.
    • A variance may be available only under the statutory practical-difficulties requirements.
    “Area, dimensional, or other numerical limitations subject to variances include but are not limited to requirements for minimum lot size, setbacks, yard widths, height, bulk, sidewalks, fencing, signage, and off-street parking. To receive the requested area, dimensional, or other numerical variance, the property owner must prove that the practical difficulties faced are unique to the property at issue and not self-created and must also demonstrate that granting the variance will not significantly alter the essential character of the surrounding neighborhood.”
  • Lot coverageDistrict specific (with conditions)

    Lot-coverage limits administered through Iowa county zoning districts, where adopted.

    • County zoning powers apply only outside city corporate limits.
    • The statute authorizes regulation of the percentage of a lot occupied but does not state a statewide percentage.
    • Agricultural-use and floodplain exceptions in §335.2 apply.
    “the percentage of lot that may be occupied”
  • 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:”
  • Agricultural exemptionConditional

    Land, farm houses, farm barns, farm outbuildings, and other buildings or structures primarily adapted by reason of nature and area for agricultural purposes, while used for those purposes, under county ordinances adopted pursuant to Iowa Code chapter 335.

    • The exemption applies except to the extent required to implement section 335.27.
    • An ordinance may still apply to any structure, building, dam, obstruction, deposit, or excavation in or on the floodplains of any river or stream.
    • The county may not require an application, approval, or fee for the ordinance to be deemed inapplicable under this section.
    • Qualifying land, farm houses, farm barns, farm outbuildings, or other buildings or structures may qualify independently or in combination with other agricultural uses.
    • Land enrolled in a soil or water conservation program is considered land primarily adapted for agricultural purposes.
    • The exemption concerns ordinances adopted under chapter 335; chapter 335 applies to a county at the option of its board of supervisors.
    “no ordinance adopted under this chapter applies”
  • 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.

  • Building height — Building-height requirements in rural Harrison County.
  • Living in an RV — Occupancy of recreational vehicles on private land in rural Harrison County.
  • Camping on your land — Temporary camping on private land in rural Harrison County.
  • Tiny homes — Occupancy of tiny homes in rural Harrison County.
  • Mandatory utility hookup — Water or sewer connection requirements for rural Harrison County property.
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 Harrison County, Iowa

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

Harrison County scores 60/100 on the Bolthole Index, a solid county profile. Its strengths: sparse surroundings — about 6,428 people within a 30-minute drive and higher long-term carry cost.

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

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

Land in Harrison County runs about $8,414 per acre, based on the latest county data.

What is the water situation in Harrison County?

Harrison County gets about 32.6" of rain a year, with severe drought in roughly 14.9% of years.

How remote is Harrison County?

A representative private-land location has about 6,428 people within a 30-minute drive and 1,853,137 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 Harrison compares in Iowa

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