Davis County, IA Building Permits, Zoning & Septic Rules

Unincorporated Davis County, Iowa does not require a county building permit for a home, barn or shed, and the county has no zoning ordinance covering unincorporated land¹². Septic (onsite wastewater) permits go through ADLM Environmental Public Health, a four-county district covering Appanoose, Davis, Lucas and Monroe Counties³⁴. Building near a stream or river can still trigger a state floodplain development permit⁵, and the Davis County Highway Department permits new driveways and entrances onto county roads⁶.

At a glance

Building permit: Not required in unincorporated Davis County¹
Zoning: No county zoning office or ordinance found; towns zone themselves²
Septic permits: ADLM Environmental Public Health (Appanoose-Davis-Lucas-Monroe district)³
Owner-builder exemption: Exempt from IA contractor registration on your own property, not from permits⁷
Manufactured homes: Allowed if placed on a permanent foundation, same standards as a site-built home⁸
Accessory dwelling units: County must allow at least one ADU per lot, up to 1,000 sq ft⁹
Floodplain permit: Required for most construction along Iowa's streams and rivers⁵
Driveway/entrance permit: Free permit from the Davis County Engineer for new entrances⁶¹⁰

Who to call

Septic permits

ADLM Environmental Public Health

Septic (onsite wastewater) system permits, inspections and forms for Davis County

(641) 724-3511

12307 Highway 5, Moravia, IA 52571

Roads & driveways

Davis County Highway Department (County Engineer)

County road maintenance and permits for driveway/entrance, right-of-way and utility use on Davis County roads

641-664-2542

[email protected]

21585 Lilac Ave, Bloomfield, IA 52537

Roads & driveways

Davis County Engineer's Office - Access Control Policy

Sets Davis County's rules and permit for new driveway/entrance access points onto county roads

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 Davis County, Iowa?

Unincorporated Davis County, Iowa does not require a county building permit for a house, garage, barn or shed¹. Davis County has no building department, and Iowa's State Building Code only reaches a county once its Board of Supervisors adopts it by ordinance; nothing on the county's official site shows that Davis County has done that¹¹¹. Two rules still apply everywhere in Iowa no matter what a county adopts: factory-built structures must meet the state's factory-built-structure standards, and any construction with heated or cooled space must meet the state's thermal-efficiency energy-conservation rules¹². If Davis County ever adopts the State Building Code, a local building department could then require a permit before construction starts and a certificate of occupancy when it finishes¹³¹⁴. None of this waives Iowa's other permits: septic, floodplain work and a new road entrance each have their own permit, covered below³⁵⁶.

Who handles building and zoning questions in Davis County?

Davis County has no building, codes, or planning-and-zoning department on its official website¹². The Davis County Board of Supervisors, based at the courthouse in Bloomfield, adopts county ordinances, including the county's subdivision ordinance¹⁵. Two offices you will actually deal with when building on rural land: ADLM Environmental Public Health for septic permits⁴, and the Davis County Highway Department (County Engineer) for driveway, entrance and right-of-way permits on county roads⁶. If a floodplain permit applies to your site, Iowa DNR screens the application through its PERMT tool rather than a county office⁵. We could not confirm from the county's official site whether the Board of Supervisors has ever adopted the State Building Code or a countywide zoning ordinance; call the Board of Supervisors directly to check before you buy.

Does Davis County have zoning?

Davis County's official website lists no zoning or planning office, and we found no adopted countywide zoning ordinance for unincorporated Davis County; only a subdivision ordinance governing how land is divided is confirmed²¹⁵. Iowa law lets a county adopt zoning for the area outside city limits at the option of its Board of Supervisors, and even where a county does zone, the ordinance generally cannot reach agricultural land, farmhouses, farm barns or other structures used for farming¹⁶. Because Davis County appears not to have opted in, unincorporated land is not confirmed to carry county setback, lot-coverage, building-height, minimum-lot-size or minimum-dwelling-size rules; we could not verify a rule either way, so ask the Board of Supervisors about your specific parcel before you plan a build. Incorporated towns inside Davis County set their own zoning, and a town's rules stop at its limits; they do not reach unincorporated county land². One statewide rule reaches Davis County either way: wherever zoning does apply, it cannot bar a manufactured home from a residential lot solely because it is manufactured, though the home must meet the same foundation, setback and minimum-square-footage standards as a site-built house on that lot⁸.

How do septic permits work in Davis County?

Septic system permits in Davis County go through ADLM Environmental Public Health, a health district that covers Appanoose, Davis, Lucas and Monroe Counties on behalf of each county's board of health³⁴. Iowa splits septic authority between the state and counties: county boards of health enforce standards that must be at least as strict as the state's, while Iowa DNR keeps concurrent authority and can step in if a county board falls short¹⁷. Only 0.3% of Davis County's soils are free of severe limitations for a conventional septic drain field, so most sites need a site or percolation evaluation and some will need an engineered or alternative system rather than a standard gravity drain field¹⁸. Iowa also requires a certified inspection of a private sewage system before most ownership transfers, valid for two years, with the tank opened and pumped unless it was pumped within the prior three years by a licensed cleaner¹⁹. Budget for that inspection when buying land with an existing system, and start the ADLM permitting process early if building new, since Davis County soils run against a simple drain field⁴¹⁸.

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

We could not find an official Davis County or Iowa rule that specifically addresses living in an RV or a tiny home on rural land here; this is an open question the county's official site does not answer. What is confirmed is narrower: Davis County has no zoning office or ordinance covering unincorporated land that we could locate, so there is no known zoning district that would set RV or tiny-home occupancy rules outside a town². Manufactured homes are a separate, better-defined category under Iowa law: a manufactured home cannot be turned down solely for being manufactured, but it must sit on a permanent foundation and meet the same setback and minimum-square-footage standards as a site-built home on the same lot⁸. Iowa also now requires a county to allow at least one accessory dwelling unit, up to 1,000 square feet or half the size of the main home, on a lot with a single-family residence, which may be a path to a small second home if you already have a house there⁹. Call the Board of Supervisors before moving an RV, tiny home or mobile home onto vacant Davis County land, and call ADLM before you hook up wastewater, since septic is confirmed and regulated even where RV or tiny-home occupancy itself is not⁴.

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

Confirm your parcel is in unincorporated Davis County, not inside a town, since a town's own zoning and building rules apply only within its limits².
Call ADLM Environmental Public Health to start your septic (onsite wastewater) permit before you pick a house site; Davis County soils are difficult, so plan time for a site evaluation and possibly an engineered system⁴¹⁸.
If your site is near a stream or river, check Iowa DNR's PERMT screening tool; a floodplain development permit may be required before you build⁵.
Contact the Davis County Highway Department (County Engineer) for any new driveway or entrance onto a county road; the first entrance to a new residence or an acreage without current access is installed by the county, and the permit for an additional entrance carries no fee, though drainage materials are billed to the landowner⁶¹⁰.
If your home will be a manufactured home, plan for a permanent foundation and the same setback and square-footage standards a site-built home would need on that lot⁸.
If you plan to build yourself, know that Iowa's owner-builder exemption only excuses you from contractor registration on your own property; it does not by itself waive any permit, inspection or occupancy step that otherwise applies²⁰.
Call the Davis County Board of Supervisors to ask directly whether any county building or zoning ordinance applies to your specific parcel; we could not confirm one either way from official sources.

What to check before you buy land in Davis County

Davis County sits about 84 miles from the nearest metro area with roughly 18.3 people per square mile, so plan for a genuinely rural, low-density county²¹²². About 21.6% of the county is wooded and 85.3% of land sits at 15% slope or less, which favors building sites and driveways on most parcels²³²⁴. Water and septic deserve the closest look: only 0.3% of Davis County's soils are free of severe limitations for a conventional septic drain field, so budget for a site evaluation before you buy¹⁸. Ask about flood risk directly with the seller and Iowa DNR if the parcel is near a stream, since a floodplain development permit can apply to construction along Iowa's waterways⁵. Typical property taxes here run about 1.5% of value, with a median annual bill near $2,217, and a typical home insurance premium runs about $1,619 a year²⁵²⁶²⁷. Finally, confirm road access and any entrance permit with the Davis County Highway Department, and confirm septic and any building question directly with ADLM and the Board of Supervisors before closing, since Davis County's absence of a listed zoning or building-permit office is not the same as a specific ordinance we could confirm⁶⁴².

Watch-outs

Davis County's "no zoning" and "no building permit" status rests on the absence of a listed building, codes or zoning office on the county's own website, not on a specific ordinance stating so; confirm with the Board of Supervisors before you buy²¹.
Iowa's owner-builder exemption only excuses you from contractor registration on your own property under Iowa Code chapter 91C; it does not waive any permit, inspection or occupancy requirement that otherwise applies²⁰.
We could not confirm an official Davis County rule on RV living, tiny-home occupancy, minimum dwelling size, minimum lot size, setbacks or short-term rentals; ask the Board of Supervisors about your specific parcel before you plan around any of these².

Sources

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.

How Davis County scores

Seclusion74100% ev.

Self-Sufficiency64100% ev.

Admin Boringness86100% ev.

Durability42100% ev.

Property Autonomy51100% ev.

Carry Cost69100% 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 →

$238kTypical home

1.5%Property tax

$5,154Land / acre

38.1"Annual rain

12.8% of yrsSevere drought

8.5 / yr (+7.2)Mid-century 100°F days

16.6 daysMid-century dry spell

1.96" (+8.2%)Mid-century 1-day rain

1.85×Wildfire change factor

100%Forward climate coverage

$1,619Home insurance / yr

2.4% / yrInsurance growth

1.95%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

8,166People within 30 min

502,012People within 2 hr

12,495Radius comparison (15 mi)

18.3People / sq mi

0%Federal land

85.3%Land at 15% slope or less

0.3%Septic soil without severe limits

901 acWorkable land screen

21.6%Wooded land

40.6 tonsBiomass / forest ac

51°FAvg temp

Answers from the rulebook for Davis County

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

Davis County rules

Subdividing landRegulated (with conditions)
Subdivision of land in Davis County, Iowa; the source identifies a county subdivision ordinance, but the reviewed excerpt does not specify whether particular provisions differ between unincorporated and incorporated areas.
- Davis County Ordinance No. 9 is readopted in its entirety by Ordinance No. 30.
- The reviewed source does not provide the ordinance's numeric standards, application process, fees, or exceptions.
“6. No. 9 “An Ordinance Relating to the Subdivision of Land” readopted in its entirety.”
Board of Supervisors - Davis County ↗Re-checked Sep 11, 2026
County-wide zoningAbsent
The county lists no zoning or planning department and has not adopted county-wide zoning for unincorporated areas (only subdivision guidance exists); municipalities administer their own zoning.
Davis County IA - County Offices ↗Scouted from the county site, not yet independently re-checked

Iowa rules that apply here

Building permitLimited
Buildings and structures in Iowa, including Davis County, when the State Building Code is operative or another stated statutory condition applies
- The State Building Code applies in a governmental subdivision where the governing body has enacted an ordinance accepting the code.
- The code also applies to buildings owned by the state or a state agency.
- The code applies to newly constructed buildings and structures paid for in whole or in part with state-appropriated money but not wholly state-owned.
- The code applies in cities over 15,000 population that have not adopted a substantially conforming local building code.
- Factory-built-structure provisions apply throughout Iowa.
- Thermal-efficiency energy-conservation provisions apply to all construction containing enclosed space that is heated or cooled, subject to appropriate exceptions.
- When the State Building Code is operative, a local building department may prohibit commencement of construction until a permit is issued after showing compliance.
“Prohibit the commencement of construction until a permit has been issued by the local building department”
Iowa Code Chapter 103A - State Building Code ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Limited — 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.
  “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 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.”
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
InspectionsLimited
New buildings and additions in Iowa, including Davis County, when one of the statutory/state-program conditions applies
- State Building Code inspectors perform inspections when construction is for a building owned by the State of Iowa.
- They perform inspections when construction is financed by a State of Iowa agency.
- They perform inspections when the local jurisdiction has adopted the State Building Code.
- They perform inspections for Secure an Advanced Vision for Education program-funded Grades K-12 construction when there is no locally adopted and enforced building code.
- The Davis County-specific applicability of these conditions was not established by the county sources reviewed.
“The local jurisdiction has adopted the State Building Code.”
Building Code Plan Review ↗Re-checked Sep 11, 2026
One more reviewed finding on this topic
- Limited — 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.
  “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
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.”
Iowa Code §335.30, Manufactured and modular homes ↗Re-checked Sep 11, 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:”
Senate File 2369 — Enrolled ↗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:”
  Senate File 2369 — Enrolled ↗Re-checked Sep 11, 2026
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.”
Iowa Code §455B.172, Jurisdiction of department and local boards ↗Re-checked Sep 11, 2026
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.”
Iowa Code §455B.172, Jurisdiction of department and local boards ↗Re-checked Sep 11, 2026
Building in a floodplainRequired
Construction and other development in flood plains and floodways in Iowa, including Davis County, when the project meets applicable state thresholds.
- The Iowa DNR states that permits are required for most work on floodplains of streams and rivers throughout Iowa.
- Regulatory thresholds depend on construction type and location and are outlined in 567 Iowa Administrative Code Chapter 71.
- PERMT screening determines whether a state application is required.
- Federal, state, and local permits may all be required before construction.
- PERMT does not submit applications to county or city officials or the U.S. Army Corps of Engineers; applicants remain responsible for those permits.
- Exceptions exist for certain projects on very small streams.
- If a state application is required, the application is submitted through PERMT to Iowa DNR Flood Plains and Sovereign Lands.
“For construction along most of Iowa’s waterways, you are required to obtain a floodplain development permit.”
Development Permits ↗Re-checked Sep 11, 2026
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”
State of Iowa Fees ↗Re-checked Sep 11, 2026
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.”
Access Management ↗Re-checked Sep 11, 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

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

Local zoning — Local zoning within Davis County, including incorporated municipalities and unincorporated areas.
Zoning districts — Zoning districts, zoning maps, or district classifications in Davis County.
Minimum dwelling size — Minimum dwelling-size requirements in Davis County, Iowa.
Minimum lot size — Minimum lot-size requirements in Davis County, Iowa.
Setbacks — Building and property setbacks in Davis County, Iowa.

5 more unanswered

Lot coverage
Building height
Camping on your land
Tiny homes
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 Davis County, Iowa

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

Davis County scores 74/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and sparse surroundings — about 8,166 people within a 30-minute drive.

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

Davis 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 ADLM Environmental Public Health (Appanoose-Davis-Lucas-Monroe). 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 Davis County, Iowa?

Land in Davis County runs about $5,154 per acre, based on the latest county data.

What is the water situation in Davis County?

Davis County gets about 38.1" of rain a year, with severe drought in roughly 12.8% of years.

How remote is Davis County?

A representative private-land location has about 8,166 people within a 30-minute drive and 502,012 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 Davis County, Iowa

At a glance

Who to call

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

Who handles building and zoning questions in Davis County?

Does Davis County have zoning?

How do septic permits work in Davis County?

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

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

What to check before you buy land in Davis County

Watch-outs

Sources

Davis County in Iowa

How Davis County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Davis County

Davis County rules

Iowa rules that apply here

Still unanswered

Living off-grid in Davis County, Iowa

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

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

How much does land cost in Davis County, Iowa?

What is the water situation in Davis County?

How remote is Davis County?

How Davis compares in Iowa