Adair County, IA: No Building Permit, No Zoning

Unincorporated Adair County, Iowa has no general countywide zoning and does not appear to require a general residential building permit.¹² A septic permit, well permits, a county-road driveway permit and a floodplain development permit can still apply; cities set their own building-permit and zoning rules, while the county Environmental Health program handles septic systems countywide.³⁴⁵⁶⁷

At a glance

Building permit: No general residential permit indicated for unincorporated areas; confirm the project before building²
Zoning: No general countywide zoning; airport-height, floodplain and city zoning still apply where relevant¹⁶
Septic: Septic permit, percolation test and pre-cover inspection through Environmental Health countywide⁷³⁸
Private well: Both state and county permits are required before drilling⁴
Owner-builder: Own-property work is exempt from contractor registration; trade exemptions are narrower for existing homes⁹¹⁰¹¹
RV or tiny home: No general county zoning, so no county zoning rule on RVs or tiny homes was found in unincorporated areas; septic rules still apply¹⁷
County-road driveway: $50 permit application fee for a new or widened driveway in county right-of-way⁵¹²
Floodplain work: Development permit required before work in regulated floodplain areas⁶

Who to call

Septic permits

Adair County Environmental Health

Septic permits, percolation tests, installation inspections, time-of-transfer inspections and private-well permits for Adair County

641-747-3972

2002 State St., Guthrie Center, IA 50115

Roads & driveways

Adair County Engineer

County-road driveway, right-of-way and utility permits, plus secondary-road access questions

641-743-6111 (Admin)

assteng@adaircountyiowa.org

602 SW 2nd St., Greenfield, IA 50849

Online permits →

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Adair 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 Adair County, Iowa?

Unincorporated Adair County does not appear to require a general residential building permit, but county materials do not expressly say that every ordinary home is exempt.² Iowa's state building code applies only in specified situations and does not create a universal state building-permit requirement for every private rural home.¹³¹⁴ Confirm an unusual project with the Adair County Auditor or Board of Supervisors. A septic permit is required to install or replace a septic tank, state and county well permits are required before drilling, a county-road driveway permit is required for a new or widened entrance in county right-of-way, and a floodplain development permit is required before regulated floodplain work.³⁴⁵⁶ Inside incorporated cities, building-permit rules are municipal: the City of Adair uses a building-permit application, and Fontanelle's local code establishes a building-permit application fee.¹⁵¹⁶ Septic regulation remains with Adair County Environmental Health throughout the county.⁷

Who issues building permits in Adair County, and who handles the other permits?

Adair County does not identify a general residential building department for unincorporated land.² Incorporated cities apply their own building-permit and zoning rules; the City of Adair sends building-permit applications to its City Council, while Stuart and Fontanelle have municipal land-use controls.¹⁵¹⁷¹⁶ City authority does not replace countywide septic oversight: call Adair County Environmental Health at 641-747-3972 for a septic permit or well permits.⁷¹⁸ For a county-road driveway permit, contact the Adair County Engineer at 641-743-6111 (Admin) or assteng@adaircountyiowa.org.¹⁹ A primary-highway driveway permit instead goes through the Iowa Department of Transportation district office.²⁰ The county does not name the current floodplain administrator in the available material, so ask the Auditor or Board of Supervisors where to submit a floodplain development permit application.⁶

Does Adair County have zoning?

Adair County has no general countywide zoning for rural or unincorporated land.¹ We found no county zoning rule on minimum dwelling size, lot size, setbacks, lot coverage, tiny-home occupancy or temporary camping there, so ask the Board of Supervisors to confirm for a specific parcel.¹ Specialized rules still apply. Airport-height zones around Greenfield Municipal Airport use mapped districts, and the horizontal zone caps structures at 150 feet above the established airport elevation; permit and variance applications go to the City Zoning Administrator.²¹²²²³ Regulated floodplain work needs a floodplain development permit, and factory-built homes in special flood-hazard areas must meet elevation, foundation and anchoring requirements.⁶²⁴ Municipal zoning is separate: Stuart has a zoning ordinance, the City of Adair requires building-permit applicants to certify zoning compliance, and Fontanelle has local land-use rules.¹⁷¹⁵¹⁶

How do septic and well permits work in Adair County?

Adair County Environmental Health administers private sewage rules countywide through a contract with Guthrie County.⁷ Installing or replacing a septic tank requires a septic permit: contact Guthrie County Environmental Health, complete the percolation test, and obtain the permit before installation.³ The new or replacement system must be inspected before it is covered.⁸ Early site evaluation matters because only about 0.1% of mapped county soils are rated free of severe limitations for a conventional drain field; that rating does not prohibit septic, but it makes siting and design especially important.²⁵ Iowa requires a certified septic inspection for qualifying property transfers involving covered private systems, subject to statutory exceptions.²⁶ A private or heat-pump well requires both state and county well permits, and the county program performs a water test after completion.⁴ Call Environmental Health at 641-747-3972 before committing to a house site or well location.¹⁸

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

Unincorporated Adair County has no general countywide zoning, and we found no county zoning rule on RV, tiny-home or temporary-camping occupancy.¹ That answer is about county zoning, not sanitation, floodplain rules, airport-height rules or municipal codes. A septic permit and approved wastewater system may still be required, so discuss the proposed RV or tiny-home setup with Environmental Health.³⁷ Inside a city, ask the city about zoning approval and building permits; Adair, Stuart and Fontanelle have documented municipal controls.¹⁵¹⁷¹⁶ Greenfield's tornado program is a narrow exception, not a general county rule: displaced Greenfield residents may use trailers, campers or RVs as temporary housing under a Tornado Impacted Victim Compliance Permit for two years.²⁷ In a special flood-hazard area, a new or substantially improved factory-built home must meet the county's elevation, permanent-foundation and anchoring rules.²⁴

Building a home in Adair County: the steps, in order

Confirm whether the parcel is unincorporated or inside a city. Unincorporated land has no general countywide zoning, while municipal zoning and building-permit rules vary.¹²⁸
For unincorporated land, confirm whether the proposed home needs any general residential building permit; the current record indicates none but does not contain an express county statement covering every project.²
Check the mapped airport-height and floodplain areas before fixing the house location, and obtain a floodplain development permit if the site is regulated.²¹⁶
Call Environmental Health at 641-747-3972 for the septic percolation test, septic permit and pre-cover inspection, plus county and state well permits.³⁸⁴¹⁸
Obtain a county-road driveway permit before constructing or widening a driveway in county right-of-way; the application fee is $50.²⁹¹²
Owner-builders working only on their own property are exempt from contractor registration, but plumbing, mechanical and electrical licensing exemptions are limited and do not waive applicable permits or inspections.⁹¹⁰¹¹

What should you check before buying land in Adair County?

Start with septic feasibility: only about 0.1% of mapped Adair County soils are rated free of severe limitations for a conventional drain field, even though about 91.5% of the land has a slope of 15% or less.²⁵³⁰ Confirm a legal entrance because a new or widened driveway in county right-of-way requires a county-road driveway permit and a $50 application fee.⁵¹² Determine whether the building site touches a floodplain or mapped airport-height zone.⁶²¹ Floodplain subdivision proposals also face drainage and access standards, with flood-elevation data required above the ordinance's size threshold.³¹ If the parcel needs a well, budget for both state and county well permits.⁴ The effective property-tax rate is about 1.3%, the median annual property-tax bill is about $1,858, and USDA census farmland value is about $7,226 per acre.³²³³³⁴

Watch-outs

The apparent lack of a general residential building permit does not remove septic permits, well permits, county-road driveway permits or floodplain development permits.²³⁴⁵⁶
A new or widened driveway in Adair County right-of-way needs approval before work begins and carries a $50 application fee.⁵¹²
No general countywide zoning does not mean every parcel is rule-free: municipal zoning, airport-height zoning, floodplain rules and countywide septic requirements may still apply.¹²⁸²¹⁶⁷

Sources

Written October 10, 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.

Compared with neighboring counties

Unlike all 6 of its neighbors, Adair County requires no county building permit for a home.

Rule	Adair County	Madison County	Cass County	Adams County	Union County	Guthrie County	Dallas County
Building permit	Not required	Required	Required	Required	Limited	Required	Required
County zoning	No	Yes	Yes	Yes	No	Yes	Yes
Septic permits	County Env. Health	County Env. Health	County Env. Health Office	County Env. Health	County Env. Health	County Env. Health	County Env. Health Dept.

How Adair County scores

Seclusion68100% ev.

Self-Sufficiency27100% ev.

Admin Boringness86100% ev.

Durability40100% ev.

Property Autonomy51100% ev.

Carry Cost65100% 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 →

$204kTypical home

1.3%Property tax

$7,226Land / acre

36.1"Annual rain

9.5% of yrsSevere drought

5.9 / yr (+5.3)Mid-century 100°F days

17.1 daysMid-century dry spell

2.06" (+5.2%)Mid-century 1-day rain

1.75×Wildfire change factor

100%Forward climate coverage

$1,732Home insurance / yr

3.9% / yrInsurance growth

0.15%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

7,338People within 30 min

2,065,843People within 2 hr

9,631Radius comparison (15 mi)

13People / sq mi

0%Federal land

91.5%Land at 15% slope or less

0.1%Soils rated "not limited" for septic (strict USDA rating)

241 acWorkable land screen

4.2%Wooded land

39.5 tonsBiomass / forest ac

49.1°FAvg temp

Answers from the rulebook for Adair County

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

Adair County rules

County-wide zoningAbsent
General countywide zoning administered by Adair County, including the rural and unincorporated county area.
- The county has specialized land-use controls, including airport-height zoning, floodplain management, utility-scale solar, hazardous-liquid pipelines, and other specialized ordinances.
- The cited 2021 minutes state that the County had no zoning; 2024 minutes likewise refer to Adair County as not being a zoned County.
- This claim does not determine zoning adopted independently by incorporated municipalities.
“One concern is that the County does not have any zoning, which only includes a small number of other Counties in Iowa.”
March 31, 2021 Board of Supervisors Minutes ↗Re-checked Oct 4, 2026
One more reviewed finding on this topic
- Absent — General countywide zoning in Adair County, including the unincorporated area, excluding the separately identified airport-height zoning area.
  “there are potential issues with the ordinance including enforceability with not being a zoned County and the ordinance not including a clause that would grandfather in existing contracts already in the works.”
  adaircounty.iowa.gov ↗Re-checked Oct 7, 2026
Local zoningVaries (with conditions)
Aggregate local-zoning status across Adair County, including county-administered airport zoning and municipality-administered zoning such as the City of Adair; this does not mean Adair County administers municipal zoning.
- County airport zoning applies only in the Greenfield Municipal Airport vicinity and designated airport zones.
- City of Adair zoning applies within the City's municipal limits and is administered through the City Council.
- Other incorporated municipalities and any additional local zoning controls were not independently resolved in this search.
- Floodplain, subdivision, health, wastewater, and other subject-specific rules may apply separately.
“The applicant certifies that the above construction will comply with the zoning ordinance in all respects.”
Ordinance No. 4: Greenfield Municipal Airport Height Zoning Ordinance ↗Re-checked Oct 7, 2026
One more reviewed finding on this topic
- Varies (with conditions) — Local zoning within Adair County, aggregated across the county's unincorporated area and incorporated municipalities; the county itself reports that it is not a zoned county, while the City of Fontanelle maintains Chapter 155 land-use and restricted-residence controls.
  “if we had zoning currently we could do more”
  adaircounty.iowa.gov ↗Re-checked Oct 7, 2026
Zoning districtsPublished (with conditions)
Greenfield Municipal Airport Height Zoning Ordinance districts.
- The created airport-height zones are depicted on the Greenfield Municipal Airport Height Zoning Map.
- The ordinance states that a structure located in more than one zone is governed by the more restrictive height limitation.
“In order to carry out the provisions of this Section, there are hereby created and established certain zones which are depicted on the Greenfield Municipal Airport Height Zoning Map. A structure located in more than one (1) zone of the following zones is considered to be only in the zone with the more restrictive height limitation.”
Adair County Ordinance No. 4: Greenfield Municipal Airport Height Zoning Ordinance ↗Re-checked Oct 4, 2026
Building heightDistrict specific (with conditions)
Structures in the Greenfield Municipal Airport Height Zoning Ordinance horizontal zone.
- The applicable area is depicted on the Greenfield Municipal Airport Height Zoning Map.
- A structure in more than one airport-height zone is governed by the more restrictive height limitation.
maximum structure height above established airport elevation: <= 150 feet (Horizontal zone depicted on the Greenfield Municipal Airport Height Zoning Map.)
“No structure shall exceed 150 feet above the established airport elevation in the horizontal zone, as depicted on the Greenfield Municipal Airport Height Zoning Map.”
Adair County Ordinance No. 4: Greenfield Municipal Airport Height Zoning Ordinance ↗Re-checked Oct 4, 2026
Manufactured homesLimited
New and substantially improved factory-built homes in Adair County special flood-hazard areas.
- The lowest floor must be at least one foot above the 100-year flood level.
- The homes must be on a permanent foundation and anchored to resist flotation, collapse, or lateral movement.
- This is a floodplain limitation, not a determination of general countywide manufactured-home occupancy.
minimum elevation above 100-year flood level: >= 1 foot (New and substantially improved factory-built homes in special flood-hazard areas.)
“All new and substantially improved factory-built homes, including those placed in existing factory-built home parks or subdivisions, shall be elevated on a permanent foundation such that the lowest floor of the structure is a minimum of one (1) foot above the 100-year flood level.”
Adair County Ordinance 37: Floodplain Management Ordinance ↗Re-checked Oct 4, 2026
Who permits septicCounty (with conditions)
Private sewage and onsite wastewater systems throughout Adair County.
- Adair County contracts with Guthrie County to operate its Environmental Health program.
- Ordinance 6 assigns enforcement to the Adair County Board of Supervisors, which may delegate enforcement to authorized representatives.
“Adair County has a contract with Guthrie County to operate its Environmental Health program.”
Environmental Health in Adair County, Iowa ↗Re-checked Oct 4, 2026
Septic permitRequired
Installation or replacement of a septic tank in Adair County.
- A percolation test is done before the permit is issued.
- The program also provides percolation tests to size systems.
“Anyone who needs to install or replace a septic tank in Adair County must contact the Guthrie County Environmental Health Department. After a percolation test is done, a permit will be issued and an inspection will be done before the system is covered up.”
Environmental Health in Adair County, Iowa ↗Re-checked Oct 4, 2026
Septic inspectionLimited
Installation or replacement of septic tanks and on-site wastewater treatment and disposal systems in Adair County, Iowa.
- The applicant must contact the Guthrie County Environmental Health Department.
- A percolation test must be completed before a permit is issued.
- An inspection must be completed before the system is covered up.
- The county ordinance incorporates Iowa Chapter 69 on-site wastewater treatment and disposal requirements, or current revisions on file with the Adair County Auditor.
- The county page lists time-of-transfer septic inspections as a service but does not state that a time-of-transfer inspection is mandatory.
“Anyone who needs to install or replace a septic tank in Adair County must contact the Guthrie County Environmental Health Department. After a percolation test is done, a permit will be issued and an inspection will be done before the system is covered up. The Environmental Health department works with the contractor and homeowner to see that a properly designed system is correctly installed by the contractor.”
Environmental Health in Adair County, Iowa ↗Re-checked Oct 5, 2026
One more reviewed finding on this topic
- Required — Installation or replacement of a septic tank in Adair County.
  “Anyone who needs to install or replace a septic tank in Adair County must contact the Guthrie County Environmental Health Department. After a percolation test is done, a permit will be issued and an inspection will be done before the system is covered up.”
  Environmental Health in Adair County, Iowa ↗Re-checked Oct 4, 2026
Well permitRequired
Well drilling, including heat-pump wells, in Adair County.
- Both state and county permits are required.
- A water test is done after the well is completed as part of the permit.
- Heat pump wells require a permit.
“Both State and County permits are required when drilling a well. The Environmental Health department and the well driller work together to see that they are in compliance with these rules. After the well is completed, a water test is done as part of the permit. Heat pump wells also require a permit.”
Environmental Health in Adair County, Iowa ↗Re-checked Oct 4, 2026
Subdividing landRegulated (with conditions)
Subdivision proposals in Adair County special flood-hazard areas.
- Subdivisions must minimize flood damage and have adequate drainage.
- Residential subdivision lots must have vehicular access passable during the 100-year flood.
- Proposals greater than five acres or fifty lots, whichever is less, require 100-year flood-elevation data for affected special flood-hazard areas.
flood-elevation-data threshold: > 5 acres (Or more than 50 lots, whichever is less; applies to affected areas within the Special Flood Hazard Area.) · flood-elevation-data threshold: > 50 lots (Or more than 5 acres, whichever is less; applies to affected areas within the Special Flood Hazard Area.)
“Proposals for subdivisions greater than five (5) acres or fifty (50) lots (whichever is less) shall include 100-year flood elevation data for those areas located within the Special Flood Hazard Area.”
Adair County Ordinance 37: Floodplain Management Ordinance ↗Re-checked Oct 4, 2026
Driveway accessRequired
A new driveway or widening of an existing driveway located in the County's right-of-way.
- County personnel approval is required before work begins.
- A $50 application fee is published.
application fee: 50 USD (New driveway or widening of an existing driveway located in the County's right-of-way.)
“Any new driveway or widening of an existing driveway that is located in the County’s right-of-way must have a permit. This will require approval from Adair County personnel before any work is begun. $50.00 application fee.”
Permits and Policies - Engineer - Adair County, Iowa ↗Re-checked Oct 4, 2026
Building in a floodplainRequired
Any floodplain development governed by Adair County’s Floodplain Management Ordinance.
- A floodplain development permit must be secured before any man-made change to improved or unimproved real estate, including buildings, mining, filling, grading, paving, excavation, drilling, and placement of factory-built homes.
- The application must include the work description, land description, intended use or occupancy, 100-year flood elevation, lowest-floor or floodproofing elevation relative to NAVD 1988, improvement cost and pre-improvement market value for improved or rebuilt buildings, and other reasonably necessary information.
- Before use or occupancy, a professional engineer or land surveyor registered in Iowa must certify required finished fill, floor elevations, floodproofing, or other flood-protection measures.
- Variances require County Board of Supervisors direction and must satisfy the ordinance standards.
flood reference: 100-year flood · elevation datum: North American Vertical Datum 1988
“A Floodplain Development Permit issued by the Administrator shall be secured prior to any floodplain development”
Adair County Floodplain Management Ordinance ↗Re-checked Sep 26, 2026
Permit feesPublished (with conditions)
County driveway permits for work in the county right-of-way.
- The published $50 fee applies to a new driveway or widening of an existing driveway located in the County's right-of-way.
- This does not establish fees for building, septic, floodplain, or municipal permits.
driveway permit application fee: 50 USD (New driveway or widening of an existing driveway located in the County's right-of-way.)
“Any new driveway or widening of an existing driveway that is located in the County’s right-of-way must have a permit. This will require approval from Adair County personnel before any work is begun. $50.00 application fee.”
Permits and Policies - Engineer - Adair County, Iowa ↗Re-checked Oct 4, 2026
Permit processPartial
County driveway permits for work in the county right-of-way.
- The county must approve the driveway before work begins.
- The source publishes only this driveway-permit process, not a general county residential-construction permit process.
“Any new driveway or widening of an existing driveway that is located in the County’s right-of-way must have a permit. This will require approval from Adair County personnel before any work is begun.”
Permits and Policies - Engineer - Adair County, Iowa ↗Re-checked Oct 4, 2026

Iowa rules that apply here

Building permitLimited
Construction subject to Iowa's State Building Code, including state-owned buildings, buildings in governmental subdivisions that adopt the code, certain cities over 15,000 population without a substantially conforming local code, factory-built structures, and construction covered by statewide energy-conservation provisions.
- Iowa Code section 103A.10 makes the state building code applicable to all state-owned buildings and structures.
- The code applies in a governmental subdivision where the governing body has enacted an ordinance accepting the code.
- The code applies in each city with a population over 15,000 that has not adopted a substantially conforming local building code.
- Factory-built-structure manufacture and installation provisions apply throughout Iowa.
- Permit issuance and enforcement are administered under local law or ordinance; the state source does not establish one universal permit requirement for every building statewide.
- A governmental subdivision may prohibit commencement of construction until a local building department issues a permit after compliance is shown.
- The application must be signed by the owner or authorized agent and include the owner's address, a statement that the application seeks permission to construct under the code, and a statement that construction will comply with applicable energy-conservation requirements.
“The examination and approval or disapproval of plans and specifications, the issuance and revocation of building permits, licenses, certificates, and similar documents, the inspection of buildings or structures, and the administration and enforcement of building regulations shall be the responsibility of the governmental subdivisions of the state and shall be administered and enforced in the manner prescribed by local law or ordinance. [...] Prohibit the commencement of construction until a permit has been issued by the local building department after a showing of compliance with the requirements of the applicable provisions of the state building code.”
Iowa Code 2026, Chapter 103A — State Building Code ↗Re-checked Sep 11, 2026
Owner-builder exemptionConditional
An owner performing electrical work on the owner’s qualifying principal residence in Adair County, Iowa.
- The residence must be an existing dwelling rather than new construction.
- The residence may not be an apartment attached to another apartment or building.
- The residence may not be larger than a single-family dwelling.
- The residence must qualify for the homestead tax credit.
- This is an exemption from electrician licensing under Iowa Code chapter 103, not a general exemption from all electrical permits or inspections.
“Prohibit an owner of property from performing work on the owner’s principal residence, if such residence is an existing dwelling rather than new construction and is not an apartment that is attached to any other apartment or building, as those terms are defined in section 499B.2, and is not larger than a single-family dwelling, or require such owner to be licensed under this chapter. In order to qualify for inapplicability pursuant to this subsection, a residence shall qualify for the homestead tax credit.”
Iowa Code § 103.22 — Chapter inapplicability ↗Re-checked Oct 4, 2026
3 more reviewed findings on this topic
- Available — Individuals or businesses performing construction work only on their own real estate or property, including property in Adair County, Iowa, for purposes of Iowa contractor registration.
  ““Contractor” means a person who engages in the business of construction, as the term “construction” is defined in the Iowa administrative code for purposes of chapter 96, the Iowa employment security law. 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.”
  Contractor Registration ↗Re-checked Oct 4, 2026
- Conditional — An owner performing plumbing, mechanical, HVAC, refrigeration, sheet-metal, or hydronic work on the owner’s qualifying principal residence or farm property in Adair County, Iowa.
  “Prohibit an owner of property from performing work on the owner’s principal residence, if such residence is an existing dwelling rather than new construction and is not larger than a single-family dwelling, or farm property, excluding commercial or industrial installations or installations in public use buildings or facilities, or require such owner to be licensed under this chapter. In order to qualify for inapplicability pursuant to this subsection, a residence shall qualify for the homestead tax credit.”
  Iowa Code § 105.11 — Chapter inapplicability ↗Re-checked Oct 4, 2026
- 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.”
  Iowa Code 2026, Chapter 91C — Construction Contractors ↗Re-checked Sep 11, 2026
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.”
Building Code Plan Review ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Adopted (with conditions) — State-adopted building, residential, energy, mechanical, plumbing, and electrical codes applicable in Iowa.
  “2024 International Residential Code as adopted by Iowa Administrative Rule chapters 481-301”
  Building Code Plan Review ↗Re-checked Oct 2, 2026
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.”
Iowa Code 2026, Chapter 103A — State Building Code ↗Re-checked Sep 11, 2026
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.”
Iowa Code 2026, Chapter 103A — State Building Code ↗Re-checked Sep 11, 2026
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.”
Iowa Code 2026, Chapter 335 — County Zoning ↗Re-checked Oct 5, 2026
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.”
Iowa Code 2026, Chapter 335 — County Zoning ↗Re-checked Oct 5, 2026
SetbacksDistrict specific (with conditions)
Setback requirements administered through Iowa county zoning districts, where adopted.
- County zoning powers apply only to land and structures outside the corporate limits of any city.
- Local district regulations may differ by district.
- Agricultural-use structures and floodplain activities are subject to the exceptions and conditions in §335.2.
“Subject to section 335.2, the board of supervisors may by ordinance regulate and restrict the height, number of structures, and size of buildings and other structures, the percentage of lot that may be occupied, the size of yards, courts, and other open spaces, the density of population, and the location and use of buildings, structures, and land for trade, industry, residence, or other purposes, and may regulate, restrict, and prohibit the use for residential purposes of tents, trailers, and portable or potentially portable structures. However, such powers shall be exercised only with reference to land and structures located within the county but lying outside of the corporate limits of any city.”
Iowa Code 2026, Chapter 335 — County Zoning ↗Re-checked Oct 5, 2026
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”
Iowa Code 2026, Chapter 335 — County Zoning ↗Re-checked Oct 5, 2026
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:”
legis.iowa.gov ↗Re-checked Sep 11, 2026
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:”
  legis.iowa.gov ↗Re-checked Sep 11, 2026
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”
Iowa Code 2026, Chapter 335 — County Zoning ↗Re-checked Oct 5, 2026
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.”
Iowa Code 2026, Chapter 335 — County Zoning ↗Re-checked Sep 21, 2026
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.”
Iowa Code §103A.3 — Definitions ↗Re-checked Oct 5, 2026

Inside cities and towns in Adair County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

Local zoningPresent (with conditions)
Property within the corporate limits of the City of Fontanelle, Iowa, particularly the restricted residence district established by Chapter 155.
- The City Code was adopted November 11, 2019, by Ordinance No. 2019.1.
- Chapter 155 establishes a $2.00 building-permit application fee.
- A building or structure in the restricted residence district, other than residences, school houses, churches, and similar structures, requires a special-use permit approved by three-fourths of the full City Council.
- Businesses, stores, shops, or factories existing and operating in the restricted residence district on April 19, 1979, are exempt from the preceding prohibited-use section except for reconstruction, alteration, or change in use.
- The restricted-residence front-yard minimum is 20 feet, subject to the stated existing-building and double-frontage exceptions.
- The side-yard minimum is 7 feet; the rear-yard minimum is 30 feet or 20 percent of lot depth, whichever is smaller; detached garages and other unattached accessory buildings must be at least 3 feet from side or rear lot lines.
- The Code page separately lists Chapter 156 floodplain management and Chapter 165 subdivision regulations.
building permit application fee: 2 USD · special-use permit council approval: three-fourths of full Council · front yard minimum: >= 20 feet (Specified existing-building and double-frontage exceptions apply.) · side yard minimum: >= 7 feet · rear yard minimum: 30 feet or 20 percent of lot depth (Whichever amount is smaller.) · detached garage or unattached accessory-building setback: >= 3 feet (Measured from any side or rear yard line.)
“155.17 RESTRICTED RESIDENCE DISTRICT. The following area is hereby defined and established as a restricted residence district:”
Ordinances – City of Fontanelle Iowa ↗Re-checked Oct 7, 2026
3 more reviewed findings on this topic
- Present (with conditions) — Airport-height-zoning administration in Greenfield under the Greenfield Municipal Airport Height Zoning Ordinance.
  “It shall be the duty of the City Zoning Administrator to administer the regulations prescribed herein. Applications for permits and variances shall be made to the City Zoning Administrator upon a form furnished by him.”
  Adair County Ordinance No. 4: Greenfield Municipal Airport Height Zoning Ordinance ↗Re-checked Oct 4, 2026
- Present (with conditions) — Zoning regulation within the City of Stuart, Iowa.
  “165.01 SHORT TITLE. This chapter shall be known and may be cited as the “City of Stuart, Iowa, Zoning Ordinance.””
  Zoning and Subdivision, Stuart, Iowa ↗Re-checked Oct 6, 2026
- Present (with conditions) — Construction and development within the City of Adair, Iowa.
  “The applicant certifies that the above construction will comply with the zoning ordinance in all respects.”
  Application for Building Permit, City of Adair, Iowa ↗Re-checked Oct 7, 2026
Living in an RVLimited
Trailers, campers, and RVs used as temporary housing by Greenfield residents displaced by the May 21, 2024 tornado.
- A Tornado Impacted Victim Compliance Permit is required.
- The temporary-housing authorization is for two years.
- This source does not establish ordinary long-term RV-occupancy rules outside this disaster-related Greenfield program.
temporary housing duration: 2 years (Only for Greenfield residents displaced by the May 21 tornado under the compliance-permit program.)
“Greenfield residents displaced by the May 21 tornado can obtain a Tornado Impacted Victim Compliance Permit allowing for temporary housing for two years for trailers, campers, RVs, etc.”
Resources & Information | Greenfield, Iowa Tornado - 2024 ↗Re-checked Oct 4, 2026

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 in Adair County.
Tiny homes — Tiny-home occupancy in Adair County.
Off-grid sanitation — Off-grid sanitation systems in Adair County.
Mandatory utility hookup — Residential connection to public water or sewer in Adair County.
Short-term rentals — Short-term rentals in Adair 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 Adair County, Iowa

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

Adair County scores 55/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and sparse surroundings — about 7,338 people within a 30-minute drive. Watch-outs: workable self-sufficiency basics (36.1″/yr rainfall) and elevated current hazard exposure.

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

Adair County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Adair County Environmental Health (operated under contract by Guthrie 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 Adair County, Iowa?

Land in Adair County runs about $7,226 per acre, based on the latest county data.

What is the water situation in Adair County?

Adair County gets about 36.1" of rain a year, with severe drought in roughly 9.5% of years.

How remote is Adair County?

A representative private-land location has about 7,338 people within a 30-minute drive and 2,065,843 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.

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

At a glance

Who to call

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

Who issues building permits in Adair County, and who handles the other permits?

Does Adair County have zoning?

How do septic and well permits work in Adair County?

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

Building a home in Adair County: the steps, in order

What should you check before buying land in Adair County?

Watch-outs

Sources

Compared with neighboring counties

Adair County in Iowa

How Adair County scores

Find land. Bring the promising ones back.

Parcel due diligence

Cities and towns in Adair County

Answers from the rulebook for Adair County

Adair County rules

Iowa rules that apply here

Inside cities and towns in Adair County

Still unanswered

Living off-grid in Adair County, Iowa

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

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

How much does land cost in Adair County, Iowa?

What is the water situation in Adair County?

How remote is Adair County?

How Adair compares in Iowa