Bolthole Index

Carroll County, Iowa

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

41Index Score / 100
#99 of 99 in Iowa

Unincorporated Carroll County, Iowa requires a building-permit application before construction, including for a farm structure that may qualify for an agricultural exemption1. County zoning applies in unincorporated territory except where an agreement places an area under city jurisdiction, and cities have their own zoning and rules23. Septic permits and inspections come from Carroll County Environmental Health, and the county ordinance also reaches cities and towns under county health jurisdiction4.

At a glance

Building permit
Required before covered construction; narrow remodeling, small-structure and agricultural exceptions apply15
Zoning
County rules govern unincorporated land; cities have separate rules23
Septic permit
Required before a system is built or rebuilt6
Minimum lot size
Varies by district; an unimproved A-1 residential parcel requires at least 5 acres7
Minimum home size
At least 600 square feet of usable ground-floor area8
RV or tiny-home living
RV rule not confirmed (floodplain RV stays face special limits); a tiny home is treated as a dwelling needing a permit and 600 square feet910
Private wells
Permit required before a well driller begins work11

Who to call

Planning & zoning

Carroll County Planning and Zoning (Region XII COG)

Building-permit applications, agricultural exemptions, zoning review and parcel zoning or floodplain classification for unincorporated Carroll County

712-792-9914

cwhitaker@region12cog.org

Carroll County Auditor's Office, 114 E 6th Street, Carroll, IA 51401

Online permits →

Septic permits

Carroll County Environmental Health Office

Permits, percolation testing and inspections for on-site wastewater treatment and disposal systems in Carroll County

712-792-9532

608 N. Court St. Suite B, Carroll, Iowa 51401

Online permits →

Roads & driveways

Carroll County Engineer's Office

Entrance applications for new driveways on county roads

1400 West 6th St., Carroll, Iowa

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

Off-grid gear

Going off-grid in Carroll 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 Carroll County, Iowa?

Yes. Unincorporated Carroll County requires a building-permit application before construction, including for a farm structure that may qualify for an agricultural exemption1. The ordinance requires a permit before erecting, constructing, reconstructing or relocating a building, structure or tower5. Interior remodeling that does not change outside dimensions is exempt, and a structure smaller than 100 square feet in the A-1 district does not need a permit, although setbacks still apply5. Buildings primarily adapted for agriculture are exempt while used for agriculture, but floodplain rules can still apply12. The county uses an agricultural-exemption application in place of an ordinary building-permit application for a qualifying project13. The published fee schedule lists no charge for an agricultural exemption and $25 for a non-farm building valued up to $25,000; ask Planning and Zoning for the current fee on larger work14. The Iowa State Building Code applies in Carroll County only in limited cases, such as state-owned buildings, buildings partly paid for with state money, and places whose governing body has accepted it by ordinance, so ask Planning and Zoning whether inspections or an occupancy certificate follow approval1516.

Who handles Carroll County building permits and zoning?

Carroll County Planning and Zoning, working through Region XII COG, handles building-permit applications and zoning review for unincorporated Carroll County16. Drop off a permit at the Carroll County Auditor's Office, 114 E 6th Street in Carroll, or call 712-792-9914 before finalizing a site plan16. The application can be filled out online, but it must be printed, signed and mailed to the Zoning Administrator17. The published review covers agricultural use, zoning district and proposed use, lot size, setbacks, height, accessory structures and possible subdivision requirements18. Planning and Zoning also directs buyers to confirm current zoning and floodplain classification16. If a new driveway will meet a county road, obtain an entrance application from the Carroll County Engineer's Office19.

Does Carroll County have zoning?

Yes. Carroll County zoning applies in unincorporated territory, except where an intergovernmental agreement places an area under city jurisdiction2. Incorporated cities have their own ordinances, so first establish whether the county or a city controls the parcel3. The county publishes agricultural, residential, multifamily, business, interchange-service, light-industrial, general-industrial, urban-transition and public-recreation districts2021. A dwelling must have at least 600 square feet of usable ground-floor area, excluding open porches, garages and steps8. In A-1, residential construction on an unimproved parcel requires at least 5 acres, though specified existing-acreage conditions may allow one-half acre22. Lot requirements vary by district, may increase when a larger septic field is needed and do not apply to residential structures that existed by April 11, 19947. The A-1 front setback for a non-farm building is 60 feet from the road right-of-way, and A-1 primary and secondary structures are generally capped at 30 feet2324.

How do septic permits work in Carroll County?

Carroll County Environmental Health administers local septic permits and inspections, while Iowa standards govern the system and Carroll County's ordinance also reaches cities and towns under county health jurisdiction4. The owner must obtain a permit before constructing or reconstructing an on-site wastewater system; sizing depends on soil and bedroom count, and every site requires a percolation test6. As of 2024, the septic permit and percolation test each cost $3006. Environmental Health must approve and inspect the system before installation is complete6. Only about 18.3% of county soils are rated without severe limits for a conventional drainfield, so test the intended disposal area before fixing the house site25. Covered property transfers also require inspection by a certified inspector, generally valid for two years, subject to listed exceptions26. Call Environmental Health at 712-792-9532 before traveling27.

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

Carroll County's general residential-RV and temporary-camping rules could not be confirmed, so ask Planning and Zoning whether the parcel's district allows the proposed stay16. In a county-regulated floodplain, an RV avoids factory-built-home anchoring and elevation rules only when it stays fewer than 180 consecutive days, remains licensed and highway-ready, uses quick-disconnect utilities and has no permanent additions9. Longer stays or an RV that is not highway-ready must satisfy those floodplain anchoring and elevation requirements9. Carroll County's ordinance does not mention tiny homes by name, so a tiny home used as a dwelling in unincorporated Carroll County is treated under the general dwelling rules: it must conform to its zoning district, receive a building permit before construction, and contain at least 600 square feet of ground-floor area10. A tiny home on wheels that falls short of 600 square feet therefore needs Planning and Zoning's answer before purchase1016. Iowa gives manufactured homes a clearer route, subject to the same permanent-foundation, setback and minimum-size standards applied to site-built homes on the same lot28.

How do you build a home in Carroll County, step by step?

  1. Ask Planning and Zoning to confirm whether the county or a city has jurisdiction, then identify the zoning district and floodplain status316.
  2. Submit the building-permit application before construction, or the agricultural-exemption application if the proposed use may qualify1813.
  3. Confirm the district's lot size, setbacks, building height and dwelling-size rule before fixing the site plan723248.
  4. If the project creates a subdivision, address soil, drainage, flood and access standards; each new minor-subdivision lot needs street frontage or unrestricted access by perpetual easement2930.
  5. Have Environmental Health issue the septic permit after the required percolation test, and have the well driller arrange the private-well permit before drilling611.
  6. Obtain an entrance application for a new county-road driveway and arrange the septic inspection before installation is complete196.

What should you check before buying land in Carroll County?

Confirm jurisdiction, zoning district and floodplain status with Planning and Zoning before treating a map as definitive316. Test the intended septic area early because only about 18.3% of Carroll County soils are rated without severe limitations for a conventional drainfield25. Subdivision approval can be denied or delayed for flooding, poor drainage, adverse soils, groundwater, fill or other harmful site conditions, and residential access must remain passable during the ordinance's 100-year flood standard2931. Verify sewage disposal and safe water for an R-1 lot, and budget for a private-well permit if the parcel will not use public water3211. Ask the County Engineer's Office about a county-road entrance before assuming a driveway location will work19. For an improved property, request the current time-of-transfer septic report26.

Watch-outs

  • A farm project still needs an agricultural-exemption application so Planning and Zoning can determine whether the conditional exemption applies3316.
  • Carroll County's general RV-residence, temporary-camping and off-grid sanitation rules could not be confirmed; floodplain RVs have separate duration and highway-ready conditions91627.
  • The Iowa owner-builder exclusion concerns contractor registration and does not waive building permits, zoning or other construction requirements34.

Sources

  1. Planning and Zoning - Carroll County IA, quoted and re-checked
  2. Carroll County Ordinance No. 14 Zoning Regulations, quoted and re-checked
  3. Planning and Zoning, quoted and re-checked
  4. Carroll County Ordinance #3 Environmental Health Ordinance, quoted and re-checked
  5. carrollcountyiowa.gov, quoted and re-checked
  6. Septic Permits - Carroll County IA, quoted and re-checked
  7. Carroll County Ordinance No. 14 Zoning Regulations, quoted and re-checked
  8. Carroll County Ordinance No. 14 Zoning Regulations, quoted and re-checked
  9. 2017 Carroll County Floodplain Ordinance Amendment, quoted and re-checked
  10. Carroll County, Iowa Ordinance No. 14 Zoning Ordinance, amended May 14, 2018, quoted and re-checked
  11. Well Permits, quoted and re-checked
  12. Carroll County Ordinance No. 14 Zoning Ordinance, quoted and re-checked
  13. Carroll County Planning & Zoning Building Permit Application, quoted and re-checked
  14. Zoning Related Fees - Carroll County IA, quoted and re-checked
  15. Iowa Code §103A.10 — Effect and application, quoted and re-checked
  16. Carroll County Planning and Zoning (Region XII COG) (carrollcountyiowa.gov)
  17. Planning and Zoning FAQs, quoted and re-checked
  18. Planning and Zoning, quoted and re-checked
  19. Carroll County Engineer's Office (carrollcountyiowa.gov)
  20. Carroll County, Iowa, Ordinance No. 14 Zoning Ordinance, quoted and re-checked
  21. Carroll County Ordinance No. 14 Zoning Ordinance, quoted and re-checked
  22. Carroll County Planning & Zoning Building Permit Application, quoted and re-checked
  23. Planning and Zoning FAQs, quoted and re-checked
  24. Carroll County Planning & Zoning Building Permit Application, quoted and re-checked
  25. 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
  26. Septic Permits, quoted and re-checked
  27. Carroll County Environmental Health Office (carrollcountyiowa.gov)
  28. Iowa Code §335.30, Manufactured and modular homes (Iowa statewide rule), quoted and re-checked
  29. Planning and Zoning - Carroll County IA, quoted and re-checked
  30. Subdivision Ordinance Revised 3-19-2012, quoted and re-checked
  31. Carroll County Subdivision Ordinance, quoted and re-checked
  32. Carroll County Ordinance No. 14 Zoning Regulations, quoted and re-checked
  33. Ordinance 14 Zoning Regulations Amended 5-14-18, quoted and re-checked
  34. Iowa Code § 91C.1 - Definition — exemption — combined registration and licensing process, quoted and re-checked

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, Carroll County has countywide zoning.

RuleCarroll CountyAudubon CountyGreene CountySac CountyCalhoun CountyCrawford CountyGuthrie County
Building permitRequiredRequiredLimitedRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCarroll & Crawford County Env. Health Dept.County SanitarianCounty Env. HealthCounty Env. HealthCounty Board of HealthCarroll & Crawford County Env. Health Dept.County Env. Health

County locator

Carroll County in Iowa

41
County map
Carroll County highlighted among the Iowa counties · colored by Index score

How Carroll County scores

Seclusion59100% ev.
Self-Sufficiency1792% ev.
Admin Boringness48100% ev.
Durability45100% ev.
Property Autonomy51100% ev.
Carry Cost56100% ev.

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

$216kTypical home
1.1%Property tax
$10,742Land / acre
34"Annual rain
16.4% of yrsSevere drought
5.6 / yr (+5.1)Mid-century 100°F days
16.6 daysMid-century dry spell
2.12" (+8%)Mid-century 1-day rain
1.69×Wildfire change factor
100%Forward climate coverage
$1,687Home insurance / yr
4.4% / yrInsurance growth
0.54%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
22,744People within 30 min
2,054,509People within 2 hr
20,119Radius comparison (15 mi)
36People / sq mi
0.3%Federal land
96.9%Land at 15% slope or less
18.3%Soils rated "not limited" for septic (strict USDA rating)
66,351 acWorkable land screen
2.3%Wooded land
48°FAvg temp

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Cities and towns in Carroll 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.

Arcadia · Breda · Carroll · Coon Rapids · Dedham · Glidden · Halbur · Lanesboro · Lidderdale · Manning · Ralston · Templeton · Willey

Answers from the rulebook for Carroll County

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

Carroll County rules

  • Building permitRequired

    Erection, construction, reconstruction, or relocation of buildings, structures, or towers in county-regulated areas.

    • No permit is required for interior remodeling when outside dimensions are not altered.
    • No permit is required for a structure under 100 square feet in the A-1 District, but setbacks still apply.
    • Farm buildings and structures primarily adapted for agricultural purposes are exempt while so used, subject to the floodplain and Iowa Code §335.27 exceptions.

    A-1 small-structure threshold: < 100 square feet (Setbacks still apply.)

    “A building permit shall be obtained prior to erection, construction, re-construction, or relocation of any building, structure, or tower.”
    One more reviewed finding on this topic
    • Required — Construction of any structure in Carroll County, including structures associated with farming operations, according to the county Planning and Zoning page.
      “an application for a building permit must be submitted”
  • County-wide zoningPresent (with conditions)

    Zoning regulations in the unincorporated territory of Carroll County, except areas covered by a 28E intergovernmental agreement between the county and a city government.

    • Farm land, farm houses, farm barns, farm outbuildings, and other structures primarily adapted for agricultural purposes are exempt while so used, except as required to implement Iowa Code section 335.27.
    • Structures and uses within flood plains are regulated by the county Floodplain Ordinance.
    • The ordinance states that it applies to unincorporated territory, not incorporated municipalities.
    “AN ORDINANCE establishing zoning regulations for the unincorporated territory of Carroll County, Iowa, and providing for the administration, enforcement, and amendments thereof, in accordance with the provisions of Chapter 335, Code of Iowa, and for the repeal of the existing zoning regulations. [...] 14.01.020 Application - This regulation shall apply to the unincorporated territory of Carroll County, Iowa except those areas covered by a 28E intergovernmental agreement between the county and a city government. [...] 14.01.040 Farms Exempt - Except to the extent required to implement section 335.27, (Code of Iowa) no ordinance adopted under this Chapter applies to land, farm houses, farm barns, farm outbuildings, or other buildings or structures, which are primarily adapted, by reason of nature and area, for use for agricultural purposes, while so used. However, the ordinances may apply to any structure, building, dam, obstruction, deposit or excavation in or on the flood plains of any river or stream. [...] 14.01.050 Flood Plain: All structures and uses within a flood plain shall be regulated by the Floodplain Ordinance adopted by the Carroll County Board of Supervisors.”
    One more reviewed finding on this topic
    • Present — Zoning regulation in the unincorporated territory of Carroll County, except areas covered by a 28E intergovernmental agreement with a city.
      “apply to the unincorporated territory of Carroll County”
  • Local zoningVaries (with conditions)

    Aggregate local zoning across Carroll County; county zoning governs unincorporated territory while incorporated cities may administer their own ordinances.

    • The county page states that the county and each city have their own ordinances and rules.
    • This aggregate claim does not attribute municipal zoning administration to the county.
    “Although the county and each city has their own ordinances and set of rules, the general theme is usually similar.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate local zoning across Carroll County, including county zoning for unincorporated territory and separate municipal ordinances.
      “the county and each city has their own ordinances”
  • Zoning districtsPublished

    Zoning districts established by Carroll County for its unincorporated territory.

    • The ordinance applies to the unincorporated territory of Carroll County, Iowa, except areas covered by a 28E intergovernmental agreement between the county and a city government.
    • The ordinance exempts farms, farm houses, farm barns, farm outbuildings, and other structures primarily adapted for agricultural purposes while so used, except to the extent required to implement Iowa Code section 335.27; flood-plain structures and uses may still be regulated.
    • The designated districts are PR Public Recreation, A-1 Agricultural, R-1 One and Two-Family Residence, R-4 Multi-Family Residence, B-1 Business, I-S Interchange Service, I-1 Light Industrial, I-2 General Industrial, and UT Urban Transition.
    • District boundaries are established by the accompanying Zoning Map. Boundary questions are determined by the Board of Adjustment. If property is not shown in a zoning district because of error or omission, it is classified A-1 Agricultural until changed by amendment.
    • The ordinance states that it is effective after passage, approval, and publication; it records passage and approval on March 15, 1999, with amendments through October 24, 2016.
    “14.03.010 For the purpose of the regulations, the following districts are designated: “PR” Public Recreation Districts “A-1” Agricultural Districts “R-1” One and Two-Family Residence Districts “R-4” Multi-Family Residence Districts “B-1” Business Districts “I-S” Interchange Service District “I-1” Light Industrial Districts “I-2” General Industrial Districts “UT” Urban Transition Districts 14.03.020 The boundaries of these districts are hereby established as shown on a map entitled “Zoning Map,” which accompanies and is hereby made a part of this ordinance.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Zoning districts established by Carroll County Ordinance No. 14 for unincorporated territory.
      “The zoning regulations and districts as herein established”
    • Published (with conditions) — County zoning districts and district-specific controls for unincorporated Carroll County.
      “If the proposed structure is non-farm related, a determination is made concerning the zoning district in which the proposed building will be located, and its use.”
  • Minimum dwelling sizeSpecified

    Dwellings regulated by the county zoning ordinance.

    • A one-story dwelling must contain at least 600 square feet of usable ground-floor area, excluding open porches, garages, and steps.
    • A one-and-one-half- or two-story dwelling must contain at least 600 square feet of ground-floor area, excluding open porches, garages, and steps.

    minimum ground floor area: >= 600 square feet (Excludes open porches, garages, or steps)

    “A one-story dwelling shall contain not less than 600 square feet of usable ground floor area, exclusive of open porches, garages or steps.”
  • Minimum lot sizeSpecified

    Lots in county zoning districts.

    • Requirements vary by zoning district.
    • In A-1, residential construction on an unimproved parcel requires 5 acres; specified existing-residence or other conditions may allow a one-half-acre minimum.
    • U-T lot sizes are determined by the County Zoning Commission after consultation with the adjoining municipality.

    A-1 minimum lot area for residential construction on unimproved parcel: >= 5 acres (Existing-residence and other conditions may allow 1/2 acre)

    “If you are building on an existing acreage site, you may only need 1/2 acre, but if the land to be built on is bare farm land, you will need 5 acres.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Minimum lot area and lot width under the county zoning district bulk regulations.
      “5 Acre Requirement on Residential construction on an unimproved parcel of land”
  • SetbacksSpecified

    Structures regulated by county zoning districts.

    • Setbacks vary by district.
    • In A-1, the front setback for non-farm buildings is 60 feet from the road right-of-way.
    • Farm buildings may be built closer to the road, subject to applicable exemptions and other regulations.

    A-1 non-farm front setback: 60 feet (Measured from road right-of-way)

    “The building setbacks vary with each district. In an A-1 Agricultural District, the setback for non-farm buildings is 60 feet from the road right-of-way.”
  • Building heightSpecified

    Structures regulated by county zoning districts.

    • Maximum height varies by district.
    • A-1 and P-R primary structures are limited to 2.5 stories or 30 feet; secondary structures are limited to 30 feet.
    • R-4 primary structures may be 6 stories or 75 feet.

    A-1 primary structure maximum height: <= 30 feet (Also expressed as 2 1/2 stories) · A-1 secondary structure maximum height: <= 30 feet

    “The minimum lot dimensions, setback requirements, and maximum building height restrictions shall be as described as follows:”
  • Living in an RVLimited

    Recreational vehicles located in county-regulated floodplain areas.

    • For the floodplain exemption from factory-built-home anchoring and elevation requirements, the RV must remain on site less than 180 consecutive days.
    • The RV must be fully licensed and ready for highway use: on wheels or a jacking system, connected only by quick-disconnect utilities and security devices, with no permanently attached additions.
    • RV use exceeding 180 consecutive days or not ready for highway use must satisfy the ordinance's factory-built-home anchoring and elevation requirements.

    maximum exemption duration: < 180 consecutive days (Longer stays are subject to factory-built-home anchoring and elevation requirements.)

    “The recreational vehicle shall be located on the site for less than 180 consecutive days”
  • Tiny homesLimited

    A tiny home used as a dwelling in the unincorporated territory of Carroll County, Iowa, if classified as a dwelling or other structure subject to Ordinance No. 14.

    • The county ordinance does not define or separately mention a tiny home; this conclusion applies the ordinance's general dwelling and structure rules.
    • The proposed use must conform to the regulations for the zoning district where it is located.
    • A building permit is required before erection, construction, reconstruction, or relocation of any building, structure, or tower.
    • A one-story dwelling, or a 1 1/2- or two-story dwelling, must contain at least 600 square feet of applicable ground-floor area, exclusive of open porches, garages, or steps.
    • The ordinance applies to unincorporated territory except areas covered by a 28E intergovernmental agreement between the county and a city government.
    • Agricultural land, farm houses, farm barns, farm outbuildings, and other structures primarily adapted for agricultural purposes are exempt while so used, except that the ordinance may apply in flood plains.
    • Sewage disposal and water supply must be approved by the County Board of Health for lots subject to the ordinance.

    minimum ground-floor area for one-story dwelling: >= 600 square feet (exclusive of open porches, garages, or steps) · building permit: required before erection, construction, reconstruction, or relocation (no permit required for interior remodeling without altered exterior dimensions; no permit required for a structure under 100 square feet in the A-1 District, but setback requirements still apply)

    “This regulation shall apply to the unincorporated territory of Carroll County, Iowa except those areas covered by a 28E intergovernmental agreement between the county and a city government. [...] Except as hereinafter provided, no building, structure or land shall hereafter be used and no building or part thereof or structure shall be erected, constructed, reconstructed, occupied, moved, altered, or repaired, except in conformity with the regulations herein specified for the class of district in which it is located. [...] A one-story dwelling shall contain not less than 600 square feet of usable ground floor area, exclusive of open porches, garages or steps.”
  • Who permits septicMixed (with conditions)

    Private sewage disposal systems in Carroll County.

    • The county Environmental Health Office administers permits and inspections.
    • System sizing and construction standards are determined by Iowa Code Chapter 69 and State Code.
    • Time-of-transfer inspections must be performed by a DNR-certified inspector.
    “Prior to construction or re-construction of an on-site wastewater treatment and disposal system (septics), the owner is required to obtain a permit from the Environmental Health Office. The size of a system is determined by State Code based on factors such as soil type and the number of bedrooms in the house.”
    3 more reviewed findings on this topic
    • Mixed (with conditions) — Private sewage disposal systems in Carroll County.
      “permit from the Environmental Health Office”
    • County — Private septic permitting and related environmental-health services in Carroll County.
      “Carroll and Crawford County Services include: [...] Private Septic System Permitting”
    • Mixed (with conditions) — Private sewage disposal systems in Carroll County.
      “Environmental Health Office. The size of a system is determined by State Code”
  • Septic permitRequired

    Construction or reconstruction of an on-site wastewater treatment and disposal system in Carroll County, Iowa.

    • The owner must obtain a permit from the Environmental Health Office before construction or reconstruction.
    • System size is determined by State Code using factors including soil type and the number of bedrooms.
    • A percolation test is required in all cases to determine drainfield length.
    • Tank size is determined by the number of bedrooms.
    • All systems require prior approval and inspection before the system is completely installed.
    • Applications may be obtained on the county webpage or by contacting the Environmental Health Office.
    • As of 2024-04-01, the septic permit fee and percolation test fee are each $300 and are required with the returned application.
    • Environmental Health location: 608 N. Court St. Suite B, Carroll, Iowa 51401.
    • Passport and Environmental Office phone: 712-792-9532; Environmental Office cell: 712-830-1018.
    • Office hours are Monday through Friday, 8:00 a.m. to 4:30 p.m.; the page advises calling before traveling to the office.

    septic permit fee: 300 USD (Required with the returned septic permit application as of 2024-04-01.) · percolation test fee: 300 USD (Required with the returned septic permit application as of 2024-04-01.)

    “Prior to construction or re-construction of an on-site wastewater treatment and disposal system (septics), the owner is required to obtain a permit from the Environmental Health Office.”
    3 more reviewed findings on this topic
    • Required — Construction or reconstruction of an on-site wastewater treatment and disposal system.
      “Prior to construction or re-construction of an on-site wastewater treatment and disposal system (septics), the owner is required to obtain a permit from the Environmental Health Office. The size of a system is determined by State Code based on factors such as soil type and the number of bedrooms in the house.”
    • Required — Construction or reconstruction of an on-site wastewater treatment and disposal system in Carroll County.
      “Prior to construction or re-construction of an on-site wastewater treatment and disposal system (septics), the owner is required to obtain a permit from the Environmental Health Office. The size of a system is determined by State Code based on factors such as soil type and the number of bedrooms in the house. In all cases a soil test known as a percolation test is needed to determine the length of drainfield. Tank size is determined by the number of bedrooms. All systems must receive prior approval and inspection before the system is completely installed. As of 4-1-2024, the septic permit fee of $300 and the percolation test fee of $300 are required with the return of the septic permit application.”
    • Required — Construction or reconstruction of an on-site wastewater treatment and disposal system.
      “As of 4-1-2024, the septic permit fee of $300 and the percolation test fee of $300 are required with the return of the septic permit application.”
  • Septic inspectionRequired

    Private sewage systems, including time-of-transfer inspections and installation inspection.

    • Time-of-transfer inspections apply before transfer of ownership of covered buildings served by private sewage disposal systems.
    • Inspections are valid for two years from the inspection date.
    • A DNR-certified inspector must conduct the transfer inspection.
    • A system installed under county permit or passing county inspection within two years before sale or transfer is exempt from transfer inspection.
    • A demolition or weather exception may require a legally binding agreement with the County Board of Health.

    inspection validity: 2 years (From inspection date.) · time-of-transfer rule effective date: 2009-07-01

    “All systems must receive prior approval and inspection before the system is completely installed.”
  • Well permitRequired

    Private wells in Carroll County, including drinking-water, heat-pump, livestock, and monitoring wells.

    • Well drillers must arrange for the permit before work begins.
    • A penalty may apply if no permit is obtained, and the well may have to be filled if standards are not met.

    well permit fee: 250 USD (Applies to all wells.)

    “Well Permits are required on all private wells including drinking water wells, vertical heat pump wells, livestock wells, monitoring wells, etc.”
  • Mandatory utility hookupConditional

    Residential lots in the county R-1 zoning district.

    • A sewage disposal system and a safe water supply approved by the County Board of Health and State Department of Health must be provided to each lot by the owner or developer.
    • The source does not establish that public water or public sewer connections are required.
    “a sewage disposal system and a safe water supply”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural land, farm houses, farm barns, farm outbuildings, and other structures primarily adapted for agricultural purposes in unincorporated Carroll County.

    • The exemption applies while the land, building, or structure is used for agricultural purposes.
    • The exemption is subject to the extent required to implement Iowa Code section 335.27.
    • The ordinance may still apply to structures, buildings, dams, obstructions, deposits, or excavations in flood plains.
    “Except to the extent required to implement section 335.27, (Code of Iowa) no ordinance adopted under this Chapter applies to land, farm houses, farm barns, farm outbuildings, or other buildings or structures, which are primarily adapted, by reason of nature and area, for use for agricultural purposes, while so used.”
    2 more reviewed findings on this topic
    • Available (with conditions) — Farm houses, farm barns, farm outbuildings, and other buildings or structures primarily adapted for agricultural purposes while so used.
      “FARMS EXEMPT. The provisions of the Zoning Ordinance shall not be construed to apply to land, farm houses, farm barns, farm outbuildings or other buildings, structures or erections which are primarily adapted, by reason of nature and area for use for agricultural purposes while so used.”
    • Conditional — Land, farm houses, farm barns, farm outbuildings, and other structures primarily adapted for agricultural purposes while so used.
      “no ordinance adopted under this Chapter applies to land, farm houses, farm barns, farm outbuildings, or other buildings or structures, which are primarily adapted, by reason of nature and area, for use for agricultural purposes, while so used.”
  • Subdividing landRegulated (with conditions)

    Property splits and creation of new lots in unincorporated Carroll County.

    • The county planning page states that subdivision regulations may apply when there is a property split or a new lot is created.
    • The county fee schedule distinguishes minor and major subdivisions.
    • Applicable zoning district, lot-area, frontage, access, water, and sewage-disposal requirements also apply.

    minor subdivision fee: 250 USD (Fee schedule effective 10-24-16.) · major subdivision fee: 350 USD (Fee schedule effective 10-24-16.)

    “Other considerations are given when an application is received. If there is a property split or new lot created, Subdivision Regulations may apply.”
  • Driveway accessRequired

    Residential subdivisions regulated by the county subdivision ordinance.

    • Access must remain passable during a 100-year flood occurrence.

    flood event access standard: 100 year flood

    “Residential Subdivisions shall provide all lots with a means of vehicular access that will remain passable during an occurrence of a one hundred (100) year flood.”
    One more reviewed finding on this topic
    • Required — Access for new lots created through a minor subdivision.
      “No lot created after the adoption of the regulations shall contain any building used as a dwelling unless it abuts at least 20 feet on a street or have unrestricted access by perpetual easement of access. No more than two (2) lots may be accessed by easement.”
  • Permit feesPublished (with conditions)

    County zoning and building-permit-related fees in unincorporated Carroll County.

    • The published fee schedule states an effective date of 10-24-16.
    • The amount for a non-farm building above $25,000 is represented by a separate Click Here link, so the linked amount is not reproduced on the page excerpt.
    • The zoning ordinance states that building-permit fees are determined by the County Board of Supervisors.
    • Agricultural exemptions are listed as no charge.

    farm-related agricultural exemption: 0 USD · non-farm building permit up to $25,000: 25 USD · home occupations/rural enterprise: 200 USD · board of adjustment appeal: 200 USD · re-zoning request: 300 USD · construction plans: 300 USD · conditional/special use permit and zoning fee: 300 + Fee USD · minor subdivision: 250 USD · major subdivision: 350 USD

    “Zoning Related Fees Effective 10-24-16 Activity | Fee Farm Related Agricultural Exemption | No Charge Non-Farm Building Permit | Up to $25,000 | $25”
  • Permit processPartial

    County building-permit process for construction in unincorporated Carroll County.

    • An application must be submitted before construction.
    • The application is reviewed and approved by the county.
    • Review considers agricultural use, zoning district, and proposed use.
    • Agricultural buildings receive the stated exemption.
    “Prior to construction of any structure in Carroll County, whether or not is part of a farming operation, an application for a building permit must be submitted for review and approval. The purpose of the Building Permit is to ensure that the proposed construction meets certain conditions set out for the district in which it is located.”
    2 more reviewed findings on this topic
    • Published (with conditions) — County building-permit applications.
      “Yes. You can fill out the permit application on-line, but you will need to print it off and sign it and mail it to the Zoning Administrator at the address on the Permit.”
    • Published (with conditions) — County building-permit application and review process.
      “an application for a building permit must be submitted for review and approval.”

Iowa rules that apply here

  • Owner-builder exemptionConditional

    An individual performing work or having work performed on the person's own property for purposes of Iowa Code chapter 91C contractor registration; this is not stated to exempt building permits or zoning requirements.

    • The exemption applies only for purposes of Iowa Code chapter 91C.
    • A person earning less than $2,000 annually is also excluded from the chapter's definition of contractor.
    • The source does not waive building permits, zoning, inspections, or other construction requirements.

    annual earnings threshold: < 2000 USD (The statute also excludes a person who performs work or has work performed on the person's own property.)

    “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
    • Available — An owner performing work or having work performed on the owner’s own property, for purposes of Iowa contractor registration under chapter 91C, including work in Carroll County.
      “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.”
    • Available (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.
      “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.”
  • 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.”
    One more reviewed finding on this topic
    • Partial — Buildings and structures in Carroll County and elsewhere in Iowa to the extent the Iowa State Building Code applies under Iowa Code §103A.10.
      “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.”
  • 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.”
  • 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:”
  • 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.

  • Camping on your land — Temporary camping on private land.
  • Off-grid sanitation — Off-grid sanitation systems in Carroll County.
  • Short-term rentals — Short-term rental use in unincorporated Carroll County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Carroll County, Iowa

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

Carroll County scores 41/100 on the Bolthole Index, a marginal county profile. Its strengths: sparse surroundings — about 22,744 people within a 30-minute drive. Watch-outs: workable self-sufficiency basics (34″/yr rainfall).

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

Carroll County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Carroll & Crawford 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.

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

Living in an RV on your own land in Carroll County is limited to specific cases: Recreational vehicles located in county-regulated floodplain areas. For the floodplain exemption from factory-built-home anchoring and elevation requirements, the RV must remain on site less than 180 consecutive days. The RV must be fully licensed and ready for highway use: on wheels or a jacking system, connected only by quick-disconnect utilities and security devices, with no permanently attached additions. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Carroll County, Iowa?

Land in Carroll County runs about $10,742 per acre, based on the latest county data.

What is the water situation in Carroll County?

Carroll County gets about 34" of rain a year, with severe drought in roughly 16.4% of years.

How remote is Carroll County?

A representative private-land location has about 22,744 people within a 30-minute drive and 2,054,509 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 Carroll compares in Iowa

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