Bolthole Index

Butler County, Iowa

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

49Index Score / 100
#82 of 99 in Iowa

Unincorporated Butler County, Iowa requires a building permit before a building is erected, constructed, moved in, or structurally altered.1 County zoning also applies in unincorporated areas, while the Environmental Health Specialist issues private sewage permits.23 Start with the Butler County Zoning Office before settling on a house location or ordering construction materials.4

At a glance

Building permit
Required before construction, moving in, or structural alteration in unincorporated areas1
Zoning
Yes; county zoning applies to unincorporated Butler County2
Septic
Permits are issued by Butler County Environmental Health35
RV living
Long-term occupancy rule not confirmed; ask the Zoning Office and Environmental Health45
Tiny home
Local occupancy and minimum-size rules are unconfirmed; zoning and septic review still matter23
Owner-builder
Exempt from state contractor registration on your own property, but not from permits67
Private well
New wells need a construction permit; ask Butler County Environmental Health85
Floodplain work
A county permit is required for work in the floodplain4

Who to call

Building permits

Butler County Zoning Office

Building permits, zoning questions, variances, special exceptions, and floodplain permits for unincorporated Butler County

(319) 346-6629

zoning@butlercounty.iowa.gov

428 6th St. Po Box 325, Allison, IA 50602

Online permits →

Septic permits

Butler County Environmental Health Specialist Office

Well and septic permits, private-well water testing, well reconstruction and plugging oversight, and septic inspections

(319) 346-6629

mday@butlercounty.iowa.gov

428 6th St. Po Box 325, Allison, IA 50602

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

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

Yes. Unincorporated Butler County requires a building permit before starting or continuing the erection, construction, moving in, or structural alteration of a building or structure.1 The Butler County Zoning Office publishes the application online and warns that failing to obtain a permit may result in a county infraction fine.4

Iowa does not impose one universal local permit rule on every ordinary private building; local law or ordinance controls permit issuance and enforcement.9 Butler County has exercised that local role for construction in its unincorporated area.1 A separate county permit is required for work performed in the floodplain, so disclose any mapped flood area when you contact the Zoning Office.4 County permit fees were not confirmed; ask the Zoning Office for the current fee schedule before filing.

Who handles building permits in Butler County, and how do you reach them?

The Butler County Zoning Office is the practical building-permit and land-use counter for unincorporated property.4 Call the office, email it, or use the online permit application linked in the office card above. The county asks visitors to call ahead because the Zoning Administrator is frequently in the field.4

Ask the Zoning Office to confirm the parcel's zoning district, required site map, setbacks, permit fee, inspection sequence, floodplain status, and whether any occupancy approval applies. Butler County's inspection and certificate-of-occupancy requirements could not be confirmed, so get those answers before scheduling contractors. Iowa assigns plan review, permits, inspections, and enforcement to governmental subdivisions under applicable local law, rather than making one state office the routine permit counter for every private rural home.910

Does Butler County, Iowa have zoning?

Yes. Butler County has a zoning ordinance for unincorporated land, with official zoning maps kept by the Zoning Administrator.2 Iowa county zoning authority concerns land outside city corporate limits, so a property inside an incorporated city must be checked with that city instead.11

A parcel's district can control allowed uses, setbacks, lot size, building height, and where a dwelling may sit, but the applicable Butler County measurements were not confirmed. Ask the Zoning Office to identify the district and provide the current bulk requirements before drawing a site plan.4 Iowa generally limits county zoning of qualifying agricultural land and structures while they remain primarily adapted to agricultural purposes, but that statewide limitation does not establish that a particular parcel or proposed building qualifies.11 Do not treat an agricultural address as an automatic exemption; ask the Zoning Office about the proposed use.4

How do septic and well permits work in Butler County, Iowa?

Butler County Environmental Health issues private sewage permits under the county health program and also issues well permits.35 Septic permits for every address in the county, including land near a city, run through this office or the state; building and zoning permits are a separate stop at the Zoning Office.124

Iowa rules require a construction permit from the administrative authority, meaning the state and the local board of health, before a private sewage system is installed or altered; repairs that do not change treatment or disposal are exempt.1312 A newly built system needs a final inspection before backfilling, and a system serving a building must be inspected before ownership changes unless an exemption applies.14 No private system may be installed where a public sewer is available, and a sewer more than 200 feet from the building may be treated as unavailable.15 Wastewater may not be discharged to a ditch, drain tile, groundwater or the ground surface.16

A new private well also needs a construction permit from the state or a county authorized to issue them, and Butler County Environmental Health is the office to ask.85 The office performs private-well water tests and oversees well reconstruction and plugging.5 Only about 1.7% of mapped Butler County soils lack severe limitations for a conventional septic drain field, so make septic feasibility a purchase contingency and expect a site-specific evaluation.17

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

Butler County's rules for long-term RV occupancy, temporary camping, tiny-home occupancy, minimum dwelling size, and minimum lot size could not be confirmed. Ask the Zoning Office whether the proposed dwelling type and temporary living arrangement are permitted in the parcel's district, and ask Environmental Health what wastewater setup is acceptable before occupying the site, since any occupied building off a public sewer needs an approved private sewage system.4515

A manufactured home has a clearer statewide rule: a county may not reject a proposed residence solely because it is a manufactured home, but the home must meet the same permanent-foundation, setback, and minimum-square-footage standards that apply to a site-built single-family dwelling on the same lot.18 Iowa also requires a county to allow an accessory dwelling unit on a qualifying lot where a single-family residence is an allowed principal use, subject to building and other stated conditions.19 Neither rule turns an RV into an approved permanent dwelling or resolves Butler County's tiny-home standards.

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

  1. Ask the Butler County Zoning Office to confirm that the proposed dwelling is allowed in the parcel's zoning district and obtain the current site-plan, setback, fee, and inspection requirements.24
  2. Apply for the Butler County building permit before construction, moving in, or structural alteration begins.1
  3. If any work is in the floodplain, obtain the separate county floodplain permit through the Zoning Office.4
  4. Contact Butler County Environmental Health early for the septic and well permits, and schedule the final septic inspection before the system is backfilled.5814
  5. If the driveway enters an Iowa primary highway, obtain Iowa Department of Transportation approval before work begins.20 Ask the County Engineer about access from a county road because the county-road driveway process was not confirmed.
  6. If acting as your own builder, remember that Iowa's own-property exemption concerns contractor registration and does not waive Butler County permits.7

What should you check before buying land in Butler County?

Make the offer contingent on written confirmation of zoning, buildability, legal access, floodplain status, septic feasibility, and water supply. Butler County zoning and building permits apply in unincorporated areas, while incorporated-city parcels require a city-level check.2111

Septic is the most obvious physical constraint: only about 1.7% of mapped soils avoid severe limits for a conventional drain field.17 The terrain is comparatively gentle, with about 99.7% of land at a slope of 15% or less, but a gentle parcel can still have unsuitable soil or flood exposure.21 Butler County averages about 36.5 inches of precipitation each year.22 The median property-tax bill is about $2,158 per year, and the effective property-tax rate is about 1.4%, so verify the actual assessment and exemptions for the parcel rather than budgeting from countywide figures alone.2324

Watch-outs

  • Butler County's owner-builder provision is an exemption from state contractor registration, not from county building permits or zoning review.67
  • Only about 1.7% of mapped Butler County soils lack severe conventional-drain-field limits, so confirm a workable septic design before closing.17
  • A building permit does not answer the separate floodplain question; work performed in the floodplain requires its own county permit.4
  • Long-term RV occupancy and local tiny-home standards remain unconfirmed; ask both the Zoning Office and Environmental Health before using either as a residence.45

Sources

  1. Butler County Zoning Department (2026 county census)
  2. Butler County Zoning Ordinance No. 28 (2026 county census)
  3. Butler County Environmental Health (2026 county census)
  4. Butler County Zoning Office (butlercounty.iowa.gov)
  5. Butler County Environmental Health Specialist Office (butlercounty.iowa.gov)
  6. Iowa Code 2026, Chapter 91C — Construction Contractors (2026 county census)
  7. Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
  8. Iowa Administrative Code Chapter 49—Nonpublic Water Wells—Permits and Construction, quoted and re-checked
  9. Iowa Code 2026, Chapter 103A — State Building Code (Iowa statewide rule), quoted and re-checked
  10. Iowa Code 2026, Chapter 103A — State Building Code (Iowa statewide rule), quoted and re-checked
  11. Iowa Code 2026, Chapter 335 — County Zoning (Iowa statewide rule), quoted and re-checked
  12. Iowa Administrative Code Chapter 69 — Private Sewage Disposal Systems, quoted and re-checked
  13. Iowa Administrative Code Chapter 69 — Private Sewage Disposal Systems, quoted and re-checked
  14. Iowa Administrative Code Chapter 69 — Private Sewage Disposal Systems, quoted and re-checked
  15. Iowa Administrative Code Chapter 69 — Private Sewage Disposal Systems, quoted and re-checked
  16. Iowa Administrative Code Chapter 69 — Private Sewage Disposal Systems, quoted and re-checked
  17. 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
  18. Iowa Code §335.30, Manufactured and modular homes (Iowa statewide rule), quoted and re-checked
  19. legis.iowa.gov (Iowa statewide rule), quoted and re-checked
  20. Access Management (Iowa statewide rule), quoted and re-checked
  21. Share of land at 15% slope or less: Bolthole Index county data
  22. Annual precipitation: Bolthole Index county data
  23. Median property tax bill: Bolthole Index county data
  24. Effective property tax rate: Bolthole Index county data

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.

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Compared with neighboring counties

Like 5 of its 6 neighbors, Butler County requires a building permit for a home.

RuleButler CountyFloyd CountyBremer CountyFranklin CountyGrundy CountyChickasaw CountyBlack Hawk County
Building permitRequiredRequiredRequiredRequiredRequiredLimitedRequired
County zoningYesYesYesYesYesNoYes
Septic permitsCounty Env. HealthCounty Env. HealthCounty BuildingCounty Env. Health Dept.County SanitarianCounty Env. Health ProgramCounty Public Health

County locator

Butler County in Iowa

49
County map
Butler County highlighted among the Iowa counties · colored by Index score

How Butler County scores

Seclusion58100% ev.
Self-Sufficiency25100% ev.
Admin Boringness48100% ev.
Durability53100% ev.
Property Autonomy51100% ev.
Carry Cost62100% 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 →

$191kTypical home
1.4%Property tax
$8,547Land / acre
36.5"Annual rain
10.9% of yrsSevere drought
3.8 / yr (+3.6)Mid-century 100°F days
15.8 daysMid-century dry spell
1.87" (+9.9%)Mid-century 1-day rain
1.8×Wildfire change factor
100%Forward climate coverage
$1,600Home insurance / yr
2.5% / yrInsurance growth
1.04%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
11,505People within 30 min
1,481,602People within 2 hr
23,320Radius comparison (15 mi)
24.4People / sq mi
1.8%Federal land
99.7%Land at 15% slope or less
1.7%Soils rated "not limited" for septic (strict USDA rating)
6,222 acWorkable land screen
4.5%Wooded land
24.1 tonsBiomass / forest ac
46.9°FAvg temp

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Cities and towns in Butler 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.

Allison · Aplington · Aredale · Bristow · Clarksville · Dumont · Greene · New Hartford · Parkersburg · Shell Rock

Answers from the rulebook for Butler County

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

Butler County rules

  • County-wide zoningPresent

    Butler County has adopted a countywide Zoning Ordinance (No. 28, effective 7-18-23) for unincorporated areas with official zoning maps on file with the Zoning Administrator.

    Butler County Zoning Ordinance No. 28 ↗Scouted from the county site, not yet independently re-checked

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.”
  • Owner-builder exemptionAvailable (with conditions)

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

    • The exemption is from being treated as a contractor for purposes of chapter 91C; it is not stated to waive building permits, building-code compliance, inspections, or certificates of occupancy.
    • The separate annual-earnings threshold is less than $2,000, but the own-property exemption is stated independently.
    • A contractor doing business in Iowa must register under chapter 91C unless an applicable statutory exclusion applies.
    “However, a person who earns less than two thousand dollars annually or who performs work or has work performed on the person’s own property is not a contractor for purposes of this chapter.”
  • 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
    • Adopted (with conditions) — Iowa State Building Code, including the residential code framework relevant to Butler County where state or locally adopted and enforced requirements apply.
      “2024 International Residential Code as adopted by Iowa Administrative Rule chapters 481-301”
  • InspectionsLimited

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

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

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

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

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

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

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

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

    Statewide private sewage disposal regulation is shared between the Iowa Department of Natural Resources and county boards of health.

    • County boards of health must adopt and enforce standards at least as stringent as, and consistent with, commission standards.
    • The Department of Natural Resources retains concurrent authority and regulates direct discharges to waters of the state.
    • If a county board of health fails to fulfill its responsibilities, the department may exercise departmental authority.
    “Each county board of health shall regulate the private water supply and private sewage disposal facilities located within the county board’s jurisdiction, including the enforcement of standards adopted pursuant to this section.”
    One more reviewed finding on this topic
  • Septic permitRequired

    Installation or alteration of private sewage disposal systems (PSDSs) statewide in Iowa, including systems serving four homes or fewer or fewer than 15 people.

    • A construction permit issued by the administrative authority must be obtained before construction.
    • The administrative authority is the Iowa DNR or the local county board of health.
    • Local boards of health have primary responsibility for PSDSs serving four homes or fewer or fewer than 15 people; the Iowa DNR has primary responsibility for larger public systems.
    • Repair of existing PSDS components that does not change treatment or disposal of the waste is not considered an alteration, but discharge restrictions continue to apply.
    • When a publicly owned treatment works is available, or a local ordinance requires connection, a PSDS may not be installed, repaired, or rehabilitated; a POTW may be considered unavailable when it is more than 200 feet from the proposed building or exterior drainage facility, subject to the administrative authority’s final determination.
    • When a POTW is unavailable, every building where persons generate domestic sewage must be provided with an approved PSDS; a holding tank may be used only if all other PSDS options are impractical.
    • All constructed or altered PSDSs must comply with Chapter 69, and newly constructed systems require an administrative-authority final inspection before backfilling.
    • Systems discharging to designated waters of the state or subsurface drainage tile must comply with NPDES General Permit No. 4 and submit a Notice of Intent before use.

    POTW distance threshold: <= 200 feet (A POTW may be considered unavailable when it is more than 200 feet from the proposed building or exterior drainage facility.) · regulated residential scale: 4 homes or fewer or less than 15 people (Larger public systems are primarily regulated by the Iowa DNR.)

    “69.1(4) Construction permit required. No PSDS shall be installed or altered as described in 69.1(3)“b” unless a construction permit issued by the administrative authority is obtained prior to construction. PSDS installation shall be in accordance with these rules.”
    One more reviewed finding on this topic
    • Required — Installation or alteration of private sewage disposal systems in Butler County.
      “No private sewage disposal system shall be installed or altered as described in paragraph 69.1(3)“c” unless a construction permit issued by the administrative authority has been obtained. The installation shall be in accordance with these rules.”
  • Septic inspectionRequired

    Private sewage disposal systems serving buildings with one through four dwelling units, before qualifying ownership transfers statewide.

    • Inspection is required before transfer of ownership, including seller-financed real estate contracts.
    • The county recorder may not record the deed or conveyance document without a certified inspector report, unless weather or temporary physical conditions prevent inspection and the buyer executes a binding acknowledgment.
    • The requirement applies to sale, exchange, real estate contract, or other purchase of real estate and improvements.
    • Exceptions include specified court-ordered, foreclosure-related, fiduciary, family, demolition, recently installed system, partition, tax-sale, low-consideration, and qualifying family-entity transfers.
    • The septic tank must be opened and pumped at inspection, unless evidence shows it was properly pumped within three years before inspection by a licensed commercial septic tank cleaner.
    • A failing system must be renovated; a properly treating system without an unsanitary condition need not meet current construction standards.
    • Only a department-certified inspector may conduct the inspection.
    • An inspection is valid for two years for ownership transfers during that period.

    dwelling units: 1-4 · inspection validity: 2 years (for ownership transfers during that period) · prior septic pumping evidence: <= 3 years (must be by a department-licensed commercial septic tank cleaner) · civil penalty for fraudulent report: 5000 USD (and certification suspension for one year)

    “If a building where a person resides, congregates, or is employed is served by a private sewage disposal system, the sewage disposal system serving the building shall be inspected prior to any transfer of ownership of the building.”
    One more reviewed finding on this topic
    • Required — Private sewage systems serving buildings in Butler County.
      “Prior to any transfer of ownership of a building where a person resides, congregates, or is employed that is served by a private sewage disposal system, the sewage disposal system serving the building shall be inspected.”
  • Off-grid sanitationLimited

    Off-grid sanitation using private sewage disposal systems in Butler County.

    • An approved private sewage disposal system is required where a POTW is unavailable.
    • Discharge to ditches, streams, ponds, lakes, waterways, drain tiles, groundwater, or the ground surface is prohibited except as permitted by Chapter 69.
    • Abandoned systems must be pumped, crushed, and filled with sand or soil.
    “It is prohibited to discharge any wastewater from private sewage disposal systems (except as permitted in this chapter) to any ditch, stream, pond, lake, natural or artificial waterway, county drain tile, surface water drain tile, or land drain tile, to the groundwater, or to the surface of the ground.”
    One more reviewed finding on this topic
  • Well permitRequired

    Construction of private water-supply wells statewide in Iowa, including household, livestock, commercial, processing, irrigation, recreational, industrial, monitoring, dewatering, and related wells identified by the Iowa DNR.

    • A private well construction permit is required for all water-supply wells.
    • For private water-supply wells serving fewer than 25 individuals or fewer than 15 water-service connections, permits are issued by local county health departments, except Osceola County, which lacks authority to issue private well construction permits; the Iowa DNR handles permitting there.
    • The applicant must submit an application and county application fee; each county sets its own fee.
    • The county reviews completeness and location relative to contamination sources and issues or denies the permit in writing before construction proceeds.
    • The county and DNR must be allowed to visit the proposed well site before, during, and after construction.
    • Public water-supply wells serving 25 or more individuals or having 15 or more water-service connections require a Public Water Supply Construction Permit issued by Iowa DNR Water Supply Engineering; county private-well programs cannot issue those permits.
    • Private well permits are not required for geotechnical borings without well casing or screens, Geoprobe-style boreholes without temporary or permanent casing, and cathodic-protection wells.
    • Trench dewatering does not require a private well construction permit.
    • Separate water-allocation, NPDES, floodplain, or underground-injection permits may also be required depending on the project.

    public water supply threshold: >= 25 individuals served (A public-water-supply construction permit is also required at 15 or more water-service connections.) · public water supply threshold: >= 15 water-service connections (A public-water-supply construction permit is also required when 25 or more individuals are served.) · geothermal loop depth threshold: >= 20 feet (Closed-loop and open-loop geothermal systems at or beyond this depth require a private well construction permit.)

    “Private Well Construction Permits are required for all water supply wells, and for all geothermal systems - closed-loop and open-loop - that are 20 feet or greater in depth.”
    One more reviewed finding on this topic
  • Mandatory utility hookupConditional

    Wastewater utility connection versus private sewage disposal in Butler County.

    • A private system may not be installed, repaired, or rehabilitated where a publicly owned treatment works is available or local ordinance requires connection.
    • A POTW may be considered unavailable when it is more than 200 feet from the proposed building or exterior drainage facility.
    • When a POTW becomes available within 200 feet, connection is required under conditions set by the administrative authority.
    • When no POTW is available, every occupied, congregated, or employed building must have an approved private sewage system.

    POTW unavailability distance: > 200 feet (final determination is made by the administrative authority)

    “No private sewage disposal system shall be installed, repaired, or rehabilitated where a publicly owned treatment works (POTW) is available or where a local ordinance requires connection to a POTW.”
  • 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”
  • Subdividing landRegulated (with conditions)

    Subdivision of land in Iowa by repeated or simultaneous division into three or more parcels, subject to statutory exceptions and local review.

    • A subdivision plat is required when a tract is subdivided by repeated divisions or simultaneous division into three or more parcels described by metes and bounds for which no plat of survey is recorded.
    • A subdivision plat is not required when land is divided by conveyance to a governmental agency for public improvements.
    • Local cities and counties may establish and enforce ordinances regulating division and use of land within the statutory framework.

    minimum parcels triggering subdivision plat: >= 3 parcels (A plat is not required for division by conveyance to a governmental agency for public improvements.)

    “A subdivision plat shall be made when a tract of land is subdivided by repeated divisions or simultaneous division into three or more parcels”
  • Permit feesPublished

    Fees imposed and collected by Iowa state agencies, including any state-agency permit fees listed on the Iowa Government Fees Website.

    • The website does not include fees for universities or community colleges, open record requests, or costs for purchase of a product or good.
    • This claim does not establish local county or municipal permit-fee schedules.
    “Fees Imposed & Collected by State Agencies”
  • Permit processPartial

    Requests for access connections, driveways, or entrances to Iowa primary highways administered by the Iowa Department of Transportation.

    • The permitting process is administered by Iowa DOT district offices.
    • The permit application must be approved before work may begin.
    • The approval process may include internal Iowa DOT review by different offices.
    • The applicant may be asked for more information.
    • A traffic impact analysis is required for all Type A and Type B access permits.
    “In Iowa, the permitting process is administered by the Iowa DOT's district offices.”
  • 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.

  • Local zoning — Aggregate local-zoning status across Butler County municipalities and unincorporated areas.
  • Zoning districts — Published zoning districts and maps for unincorporated Butler County.
  • Building height — Building-height limits in unincorporated Butler County.
  • Living in an RV — Permanent or temporary occupancy of recreational vehicles or travel trailers on land in unincorporated Butler County.
  • Camping on your land — Temporary camping on private land in unincorporated Butler County.
4 more unanswered
  • Tiny homes
  • Driveway access
  • Building in a floodplain
  • Short-term rentals

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

Living off-grid in Butler County, Iowa

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

Butler County scores 49/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost. Watch-outs: workable self-sufficiency basics (36.5″/yr rainfall).

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

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

How much does land cost in Butler County, Iowa?

Land in Butler County runs about $8,547 per acre, based on the latest county data.

What is the water situation in Butler County?

Butler County gets about 36.5" of rain a year, with severe drought in roughly 10.9% of years.

How remote is Butler County?

A representative private-land location has about 11,505 people within a 30-minute drive and 1,481,602 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 Butler compares in Iowa

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