Building permits, zoning and land rules in Union County, Iowa
72Index Score / 100 #9 of 99 in Iowa
Unincorporated Union County, Iowa has no building or planning department, and its ordinance index lists no county residential building code, so no county building permit is required to build a home1. The county also has no zoning ordinance2, though the City of Creston zones land inside its own limits3. You will still need permits for septic, a private well, a new driveway onto a county road, and any construction in a mapped flood hazard area456.
At a glance
Building permit
Not required in unincorporated Union County; no county building department exists1
Zoning
No county zoning ordinance; the City of Creston zones only inside city limits23
Septic permit
Required before construction, $250 fee, through Union County Environmental Health7
Septic soils
0% of county soils are free of severe limits for a conventional drain field8
Well permit
Required for new or replacement wells 20 feet or deeper9
Driveway/entrance permit
Required for any new or widened entrance onto a county secondary road10
Floodplain permit
Required before development in a mapped flood hazard area11
Accessory dwelling unit
At least one allowed per lot statewide, up to 1,000 sq ft or 50% of the home's size12
Contact details are copied from each office’s official page and were checked against it on September 24, 2026.
Do you need a building permit in Union County, Iowa?
Union County lists no building or planning department, and its published ordinance index contains no county residential building code1. Iowa's state building code only reaches a jurisdiction when that jurisdiction's own governing body has enacted an ordinance accepting it, and nothing on Union County's official site shows the Board of Supervisors doing that13. Statewide, permit issuance, inspection and certificate-of-occupancy rules are left to whatever local ordinance a county or city has adopted1415. In practice that means unincorporated Union County has no county-level permitting or inspection process to build a home. The City of Creston is a separate jurisdiction and may have its own building rules for property inside city limits; this guide covers unincorporated county land only.
Who handles permits and land-use questions in Union County?
There is no Union County building department, so there is no permit office to call for a house itself. What does exist: Union County Environmental Health issues septic and private well permits4, the Union County Engineer's Office issues entrance permits for any new or widened driveway onto a county road5, and the Union County Emergency Management Agency administers the county's Floodplain Development Permit as Floodplain Administrator6. For anything not covered by those three offices, including whether a specific parcel falls under any local ordinance, the Union County Board of Supervisors is the governing body to ask, since it is the body that would have to adopt any building or zoning ordinance for the county to have one16.
Does Union County have zoning?
Union County has no countywide zoning ordinance2. Iowa law lets a county's Board of Supervisors adopt zoning at its option for land outside any city's corporate limits, but adoption is optional and Union County has not published one16. Zoning works differently inside the City of Creston: the city's own zoning map shows districts C-1, C-2, F, I-1, I-2, R-1, R-2 and R-3 for land within city limits3, and Union County does not administer those city districts17. Because unincorporated Union County has no zoning ordinance on file, there is no confirmed county rule setting setbacks, minimum lot size, minimum home size or lot coverage for rural land; do not assume rural land is unrestricted just because no zoning ordinance was found, and confirm any parcel-specific question with the Board of Supervisors before you buy.
How do septic permits work in Union County?
Union County requires a permit before you build or reconstruct a septic system, issued by Union County Environmental Health for a $250 fee47. A soil analysis or percolation test from a professional soil scientist or registered engineer is required before the permit is issued, and a licensed engineer must design any system serving more than 6 bedrooms or 900 gallons per day7. This matters more here than in most counties: USDA soil survey data shows 0% of Union County's soils are free of severe limitations for a conventional septic drain field8, so plan on budgeting for an engineered or alternative system rather than a standard gravity field. After installation, the Environmental Health Office runs a pre-construction meeting and a post-installation inspection before it will approve the system18. Iowa also requires a certified time-of-transfer inspection of most private septic systems before a qualifying sale closes, so a system that passed years ago can still need a fresh inspection when you buy19.
Can you live in an RV or tiny home on your land in Union County?
No official Union County source addresses RV or tiny-home occupancy on private rural land, and because the county has no zoning ordinance, there is no county zoning code section to point to either way2. Do not read the absence of a zoning ordinance as permission: Union County has not published a rule allowing or banning RV or tiny-home living on a rural parcel, so this is genuinely unconfirmed. Before buying with that plan, call Union County Environmental Health about septic service to a temporary or alternative dwelling4 and the Board of Supervisors about any camping or occupancy limits, since only the county's own governing body could adopt one.
Building a home in Union County: the steps, in order
Confirm soil suitability and get your septic permit from Union County Environmental Health before you finalize plans; expect a soil scientist or engineer evaluation and a $250 fee47.
If you need a new well, get a well construction permit from the same office; permits are required for wells 20 feet or deeper49.
If your lot needs a new or wider driveway onto a county secondary road, apply for an entrance permit through the Union County Engineer's Office; minimum entrance width is 20 feet and any culvert must be at least 18 inches in diameter510.
If any part of the build is in a mapped flood hazard area, get a Floodplain Development Permit from the Union County Emergency Management Agency before starting work611.
Schedule your post-installation septic inspection once the system is in418.
Because no county building department exists, there is no county building-permit or inspection step to schedule for the home itself; confirm that is still true for your specific project with the Board of Supervisors.
What to check before you buy land in Union County
Soils and septic: with 0% of county soils free of severe limits for a conventional drain field, budget for a soil test and possibly an engineered septic system before you count on a parcel working for a standard system8. Terrain: 92.6% of the county's land is at 15% slope or less, so most parcels are gentle enough to build on without major grading20, and 14.5% of the county is wooded21. Flood risk: check with Union County Emergency Management before you buy if any part of the parcel looks close to a stream or drainageway, since development in a mapped flood hazard area needs a permit and a minimum floor elevation611. Access: a driveway onto a county road needs an entrance permit with minimum width and culvert requirements, so factor that cost in before closing510. Taxes: the effective property tax rate in Union County is about 1.8%, with a typical annual bill near $2,1082223, and typical farmland runs about $5,970 per acre24.
Watch-outs
Union County has no zoning ordinance and no building department, but that is not the same as "no rules": septic, well, driveway and floodplain permits still apply, and RV or tiny-home occupancy is unconfirmed rather than allowed21.
Every soil sample category checked shows severe limitations for a conventional septic drain field, so get a percolation test before you assume a standard system will work on a specific parcel8.
Zoning inside the City of Creston does not apply to unincorporated county land, and county government does not administer Creston's zoning districts17.
Written September 24, 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.
Union County highlighted among the Iowa counties · colored by Index score
How Union County scores
Seclusion72100% ev.
Self-Sufficiency51100% ev.
Admin Boringness86100% ev.
Durability49100% ev.
Property Autonomy51100% ev.
Carry Cost67100% 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 →
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Answers from the rulebook for Union County
What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.
Union County rules
Local zoningVaries (with conditions)
Countywide aggregate of independently administered local zoning: Union County reported no county zoning, while the City of Creston publishes zoning districts for land within the city.
This is an aggregate conclusion; Union County does not administer the City of Creston's zoning districts.
The county statement was made in a July 20, 2020 wind-turbine discussion.
The Creston map identifies district codes but does not state its adoption or effective date.
The zoning status of other municipalities and townships is not established by these sources.
“City of Creston Zoning Districts C-1 C-2 F I-1 I-2 R-1 R-2 R-3”
Who permits septicMixed
Private sewage disposal systems in Union County.
Union County Environmental Health enforces local, state, and federal water and sewage-disposal regulations.
Iowa local boards of health have primary responsibility for systems serving 4 homes or fewer or less than 15 people.
The Iowa DNR has primary responsibility for larger public systems and may exercise concurrent authority if county standards are not adopted or enforced.
Union County adopts Iowa Administrative Code 567 Chapter 69 and adds county-specific requirements.
“local boards of health have primary responsibility for regulation of private sewage disposal systems (PSDSs, also known as onsite wastewater treatment systems) serving 4 homes or fewer or less than 15 people”
Septic permitRequired
Construction or reconstruction of private sewage disposal systems in Union County.
Union County requires a septic permit before construction.
The county homeowner guide states a $250 permit fee.
A soil analysis or percolation test must be completed by a professional soil scientist or registered professional engineer before permit issuance.
A licensed engineer must design systems for homes with more than 6 bedrooms or 900 gallons per day.
Contractors must be registered in Union County; self-builders must complete required classes and submit documentation.
Plastic or fiberglass septic tanks require prior Union County Board of Health approval.
Inspection ports may be required in water-sensitive or heavily concentrated dwelling areas.
septic permit fee: 250 USD
“Union County Environmental Health Office issues homeowner a permit to build”
Septic inspectionRequired
New or reconstructed onsite septic systems in Union County.
The county Environmental Health Office conducts an inspection after construction and gives approval if the system is installed correctly.
The county also conducts a pre-construction meeting with the contractor or homeowner.
Alternative systems requiring maintenance must have a maintenance provider identified and documented.
“Union County Environmental Health Office conducts inspection and gives approval when and if the system is installed correctly”
Well permitRequired
Construction or reconstruction of private and nonpublic water wells in Union County.
Union County adopts Iowa Administrative Code Chapters 39, 49, and 82 for nonpublic water wells.
Fees for construction or reconstruction well permits are established by the Union County Board of Health.
Private well permits are required for water-supply wells, including domestic, livestock, irrigation, recreational, industrial, monitoring, heat-pump, geothermal, and dewatering wells, subject to state exemptions.
Private water supply permits are issued by the local county health department for supplies serving fewer than 25 individuals or fewer than 15 service connections.
Public water supply wells serving 25 or more individuals or 15 or more service connections require a DNR permit instead.
Private well construction permits are required for wells 20 feet or greater in depth, replacement wells, and physical-dimension modifications.
State exemptions include public wells, certain monitoring wells, temporary test holes, soil borings, non-groundwater exploration boreholes, and dewatering wells in place seven consecutive days or less.
private water supply threshold: fewer than 25 individuals or fewer than 15 service connections (Public supplies at or above either threshold require DNR permitting.) · well depth threshold: >= 20 feet (State exemptions apply.)
“a landowner or landowner’s agent shall not construct a new private well without first obtaining a well construction permit”
Driveway accessRequired
Each new or widened driveway/entrance connecting to the Union County secondary road system.
A permit is required for each new or widened entrance.
Approval depends on sight distance and other related factors.
The minimum entrance width is 20 feet.
The County designates minimum pipe length and diameter for drainage; no entrance culvert may be less than 18 inches in diameter.
The County Engineer's administrative decisions regarding pipe size, pipe length, sight distance, and safety factors are final, subject to the stated appeal process.
Floodplain development in Union County areas with significant flood hazards, including buildings, structures, mining, filling, grading, paving, excavation, drilling, and placement of factory-built homes.
A Floodplain Development Permit must be secured before any floodplain development.
The application must identify the work and land, building locations and dimensions, intended use or occupancy, base-flood elevation, lowest-floor or floodproofing elevation, improvement cost and pre-improvement market value when applicable, and other information reasonably necessary to the Administrator.
The Union County Emergency Management Coordinator administers the ordinance.
Development involving structures, factory-built homes, fill, obstructions, storage, excavation, or watercourse alteration is subject to Iowa Department of Natural Resources review to determine whether the land is in a floodway or floodway fringe.
DNR review is not required for new or replacement bridges or culverts on streams draining less than 100 square miles when not associated with a channel modification constituting a channel change under 567-71.2(1)b, Iowa Administrative Code.
Approved permits authorize only the use, arrangement, and construction shown in the approved plans; certification by a registered Iowa professional engineer or land surveyor is required before use or occupancy for specified flood-protection work.
New or substantially improved residential structures generally require the lowest floor, including basement, to be at least 1 foot above base-flood elevation; alternate elevation methods may be allowed by the Board of Supervisors when specified factors preclude fill.
residential lowest-floor elevation: >= 1 foot above base flood elevation (alternate elevation methods may be allowed by the Board of Supervisors where existing topography, street grades, or other factors preclude fill) · fill extension beyond residential structure: >= 18 feet
“A Floodplain Development Permit issued by the Administrator shall be secured prior to any floodplain development”
Permit processPublished (with conditions)
New or widened entrances requested to the Union County secondary road system.
The applicant submits the Union County Entrance Application and agrees to the entrance permit terms and County Entrance Policy.
The County Engineer evaluates sight distance, drainage area, ditch depth, pipe requirements, road classification, traffic count, and entrance slope.
The County Engineer or designated representative is the permit officer.
Administrative decisions on pipe size, pipe length, sight distance, and other safety factors are final; other administrative decisions may be appealed in writing to the Board of Supervisors or orally at a regularly scheduled Board meeting.
The minimum entrance width is 20 feet; no entrance culvert may be less than 18 inches in diameter.
Slope is 6:1 on paved roads and 3:1 on rock or dirt roads.
The applicant must call Iowa One Call before self-installation and maintain required barricades and signage.
Non-compliant work must be corrected within 30 days after written notice.
minimum entrance width: >= 20 feet · minimum entrance culvert diameter: >= 18 inches · paved-road slope: 6:1 · rock-or-dirt-road slope: 3:1 · correction period after non-compliance notice: 30 days
“The County Engineer [...] is hereby named the permit officer”
County-wide zoningAbsent
The county ordinance index and department list include no county zoning ordinance or planning/zoning department.
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.”
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.”
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.”
One more reviewed finding on this topic
Limited — Buildings or structures constructed in accordance with the Iowa state building code, where the applicable governmental subdivision requires a certificate of occupancy or use by ordinance.
“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.”
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:”
2 more reviewed findings on this topic
Allowed (with conditions) — At least one accessory dwelling unit on the same lot as a single-family residence in Iowa, including Union County, subject to the statutory conditions.
“A county shall allow a minimum of one accessory dwelling unit on the same lot as a single family residence”
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:”
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”
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.”
Inside cities and towns in Union County
Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.
Local zoningPresent (with conditions)
Land within the City of Creston, Iowa.
The official city map identifies the districts as C-1, C-2, F, I-1, I-2, R-1, R-2, and R-3.
The map does not state an adoption or effective date.
“City of Creston Zoning Districts C-1 C-2 F I-1 I-2 R-1 R-2 R-3”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission — ask the county directly.
Zoning districts — Countywide zoning-district publication for Union County.
Minimum dwelling size — Minimum dwelling size rules in Union County, Iowa
Minimum lot size — Minimum lot size rules in Union County, Iowa
Setbacks — Setback rules in Union County, Iowa
Lot coverage — Lot coverage rules in Union County, Iowa
6 more unanswered
Building height
Camping on your land
Tiny homes
Off-grid sanitation
Mandatory utility hookup
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 Union County, Iowa
Is Union County a good place to live off-grid or homestead?
Union County scores 72/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and sparse surroundings — about 11,487 people within a 30-minute drive.
Do you need a building permit in Union County, Iowa?
Union 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 Union County Environmental Health / 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 Union County, Iowa?
Land in Union County runs about $5,970 per acre, based on the latest county data.
What is the water situation in Union County?
Union County gets about 36.6" of rain a year, with severe drought in roughly 6.7% of years.
How remote is Union County?
A representative private-land location has about 11,487 people within a 30-minute drive and 1,048,820 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.
Off-grid gear
Going off-grid in Union County means bringing your own water and power. The kit we’d start with:
