Bolthole Index

Carroll County, Missouri

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

66Index Score / 100
#79 of 115 in Missouri

Unincorporated Carroll County, Missouri has no adopted general residential, commercial or energy building code, but county zoning still regulates land use12. The Carroll County Health Department issues on-site septic permits, while the county's zoning administrator administers and enforces the zoning ordinance34. Ask the zoning administrator about required land-use approval before construction because the county's permit and inspection details are not fully confirmed.

At a glance

Building permit
No adopted general county building code; zoning still applies12
Zoning
Yes, for unincorporated Carroll County24
Septic permit
Carroll County Health Department issues on-site septic permits35
RV living
Not confirmed; ask the county zoning administrator2
Tiny homes
No county-specific occupancy rule confirmed2
Owner-builder
No county-specific exemption confirmed6
Septic soils
Only 2.5% lack severe limits for a conventional drain field7

Who to call

Also useful

Carroll County Commission

General county government contact and starting point for reaching the zoning administrator

660-542-0615

8 S Main Street, Carrollton, MO 64633

Zoning

Carroll County Planning & Zoning Commission (Zoning Administrator)

Administers and enforces zoning regulations in unincorporated Carroll County

Health department

Carroll County Health Department

Issues on-site septic permits, responds to septic complaints and advises on acreage-exempt systems

(660) 542-3247

5 N Ely St, Carrollton, MO 64633

Roads & driveways

Carroll County Road and Bridge Department

Maintains the county gravel-road and bridge network and answers county-road access questions

660-542-2297

22997 CR 280, Carrollton, MO 64633

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

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

Carroll County is listed by Missouri with no adopted residential, commercial or energy building code, so county oversight is limited rather than a conventional full building-code program1. Unincorporated land is still subject to county zoning administered through the Planning & Zoning Commission and enforced by a zoning administrator appointed by the County Commission24. Missouri's framework leaves building-code adoption to local governments instead of imposing one uniform statewide building code8. The available county material does not fully confirm when land-use approval, plan review, inspection or a certificate of occupancy is required. Before starting work, call the County Commission and ask the zoning administrator which approvals apply.

Who handles Carroll County building and zoning questions?

Carroll County's ordinance places zoning administration with the Planning & Zoning Commission and enforcement with a zoning administrator appointed by the County Commission4. The cited county page does not publish a separate zoning phone number, so start with the Commission at 8 S Main Street, Carrollton, MO 64633, or call 660-542-06159. For septic, contact the Carroll County Health Department at 5 N Ely St, Carrollton, MO 64633, or (660) 542-32473. For county-road access, call Road and Bridge at 660-542-229710. Ask each office what application, drawing, fee and inspection schedule applies before setting a construction date.

Does Carroll County have zoning?

Yes. Carroll County has zoning regulations for its unincorporated areas, administered through the Carroll County Planning & Zoning Commission24. Missouri law authorizes county zoning over unincorporated territory covered by an adopted county plan, while incorporated cities can have their own rules11. Have the zoning administrator identify the parcel's district and confirm allowed uses, lot dimensions and setbacks. Carroll County's ordinance treats a residence as a living place on a permanent foundation and excludes a tent, cabin, trailer or recreational vehicle from its definition of a dwelling4. That definition alone does not settle temporary camping or long-term RV occupancy, so request a parcel-specific answer.

How do septic permits work in Carroll County?

The Carroll County Health Department issues on-site septic permits, responds to complaints and advises about acreage-exempt systems35. Missouri generally requires a construction permit before installing or repairing most onsite wastewater systems, although some single-family residential lots may qualify for an exemption12. Residential property under 3 acres generally requires a permit, and non-residential systems require one regardless of parcel size; confirm any exemption before work begins12. Agency jurisdiction can vary with system type and flow because Missouri divides responsibility among state and local agencies13. Only 2.5% of county soils lack severe limitations for a conventional drain field, so make septic feasibility an early purchase contingency7.

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

Carroll County's ordinance defines a dwelling as a residential living place on a permanent foundation and expressly leaves tents, cabins, trailers and recreational vehicles outside that definition4. The available county material does not confirm a general rule for long-term RV occupancy, temporary camping during construction or tiny-home occupancy. Ask the zoning administrator whether the proposed unit qualifies as a dwelling, manufactured home or another use in the parcel's district. Manufactured homes are expressly named among residential uses in parts of the ordinance, but district placement still needs parcel-level confirmation4. Wastewater must be resolved separately because Missouri restricts off-grid sanitation and generally requires approval for covered onsite systems14.

Building a home in Carroll County: steps in order

  1. Confirm that the parcel is outside an incorporated city and ask the zoning administrator to identify its district and allowed use24.
  1. Ask which land-use application, plan review, fee, inspection and occupancy approvals apply; those details are not fully confirmed.
  1. Contact the Health Department before fixing the house location because it issues on-site septic permits3.
  1. Establish legal access and ask Road and Bridge about a county-road connection; it maintains about 920 miles of gravel roads10. State right-of-way access follows MoDOT permitting instead15.
  1. Confirm floodplain status because participating jurisdictions require permits for development in mapped flood-hazard areas16.
  1. Track timing: a county permit is valid for 12 months, with an extension available by application when construction has not started4.

What should you check before buying Carroll County land?

Start with septic feasibility: only 2.5% of county soils lack severe limitations for a conventional drain field7. Most terrain is gentle, with 96.8% of land at a slope of 15% or less, though an individual parcel can still have drainage constraints17. Carroll County averages 40.3 inches of precipitation annually, and severe drought occurs in about 7.5% of years, making drainage and water supply worth checking1819. Confirm recorded access to a maintained road; the county maintains about 920 miles of gravel roads10. The typical home value is about $170,388, the effective property-tax rate about 0.8%, and the median annual bill about $933202122.

Watch-outs

  • Carroll County zoning applies to unincorporated territory; an incorporated city may have its own rules411.
  • RV occupancy, temporary camping and tiny-home occupancy are not confirmed; ask the zoning administrator before moving a unit onto the parcel2.
  • Septic exemptions are conditional, so confirm eligibility with the Health Department before work123.

Sources

  1. State of Missouri - County Building Codes dataset (data.mo.gov) (2026 county census)
  2. Carroll County, MO - Zoning Regulations (2026 county census)
  3. Carroll County Health Department (carrollcohealth.com)
  4. Carroll County Planning & Zoning Commission (Zoning Administrator) (carrollcountymo.gov)
  5. Missouri DHSS — OWTS Construction Permit Required (2026 county census)
  6. (2026 county census)
  7. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  8. RSMo Section 64.170 (Missouri statewide rule), quoted and re-checked
  9. Carroll County Commission (carrollcountymo.gov)
  10. Carroll County Road and Bridge Department (carrollcountymo.gov)
  11. RSMo § 64.090 — Planning and zoning powers of county commission (Missouri statewide rule), quoted and re-checked
  12. OWTS Construction Permit Process, quoted and re-checked
  13. On-site Septic Systems and Subdivisions (Missouri statewide rule), quoted and re-checked
  14. Frequently Asked Questions (Missouri statewide rule), quoted and re-checked
  15. Permits | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked
  16. Laws and Regulations That Might Affect You if You Mine Sand or Gravel From Missouri Streams (Missouri statewide rule), quoted and re-checked
  17. Share of land at 15% slope or less: Bolthole Index county data
  18. Annual precipitation: Bolthole Index county data
  19. Share of years in severe drought: Bolthole Index county data
  20. Typical home value (Zillow): Bolthole Index county data
  21. Effective property tax rate: Bolthole Index county data
  22. Median property tax bill: Bolthole Index county data

Written September 28, 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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County locator

Carroll County in Missouri

66
County map
Carroll County highlighted among the Missouri counties · colored by Index score

How Carroll County scores

Seclusion73100% ev.
Self-Sufficiency51100% ev.
Admin Boringness5890% ev.
Durability47100% ev.
Property Autonomy47100% ev.
Carry Cost79100% ev.

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

$170kTypical home
0.8%Property tax
$5,366Land / acre
40.3"Annual rain
7.5% of yrsSevere drought
14.1 / yr (+11.8)Mid-century 100°F days
18.1 daysMid-century dry spell
2.02" (+7.5%)Mid-century 1-day rain
1.74×Wildfire change factor
100%Forward climate coverage
$1,786Home insurance / yr
4.9% / yrInsurance growth
1.2%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
3,424People within 30 min
2,503,844People within 2 hr
9,675Radius comparison (15 mi)
12.1People / sq mi
1.7%Federal land
96.8%Land at 15% slope or less
2.5%Septic soil without severe limits
10,778 acWorkable land screen
15.7%Wooded land
34.4 tonsBiomass / forest ac
54°FAvg temp

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Answers from the rulebook for Carroll County

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

Carroll County rules

  • Building permitLimited

    The State of Missouri building-codes dataset lists Carroll County with no adopted residential/commercial/energy building code, but the county enforces adopted county Zoning Regulations that govern land use, so regulation is limited to zoning rather than a full building-code permit.

    State of Missouri - County Building Codes dataset (data.mo.gov) ↗Scouted from the county site, not yet independently re-checked

  • County-wide zoningPresent

    Carroll County has adopted, county-wide Zoning Regulations (revised July 18, 2023) administered by its Planning & Zoning Commission, published on the county's official .gov site.

    Carroll County, MO - Zoning Regulations ↗Scouted from the county site, not yet independently re-checked

Missouri rules that apply here

  • Building code adoptedPartial

    Missouri statewide legal framework for building-code adoption by counties and other communities; the statutes authorize local adoption rather than establishing one uniformly adopted statewide building code.

    • County authority under RSMo 64.170 applies to counties of the first and second classification.
    • A county that had not adopted a building code before August 28, 2001 must obtain voter approval before adopting under RSMo 64.170 to 64.200.
    • The adoption vote is limited to voters in the affected area; a code affecting a county is not voted on by citizens of incorporated territory.
    • A county adopting under RSMo 64.180 must use a current nationally recognized building code edition from calendar year 1999 or later, as amended.
    • A county building ordinance may not conflict with liquefied petroleum gas installation requirements governed by RSMo 323.020.
    • A community may incorporate a code by reference only if it otherwise has legal power to adopt the ordinance.
    • A code incorporated by reference must be filed with the community clerk and available for public inspection for 90 days before adoption.
    • An ordinance adopting a code by reference must state the penalty separately rather than incorporate the penalty by reference.
    • RSMo 67.280 defines community to include any county, fire protection district, or municipality, and municipality to include an incorporated city, town, or village.
    “Because fire and building codes are adopted at the local level in Missouri”
  • Who permits septicMixed

    Missouri wastewater treatment systems, including domestic onsite systems, larger-flow systems, direct discharges, lagoons, subdivisions, and industrial wastewater.

    • DNR regulates direct point-discharge or surface-land-application systems, non-individual lagoons, facilities exceeding 3,000 gallons per day, and industrial process waste.
    • DHSS or a local agency, typically the county health department, regulates single-family subsurface onsite systems, individual single-family lagoons, and qualifying systems at or below 3,000 gallons per day.
    • Local agencies may administer qualifying systems under local authority or ordinance.

    domestic wastewater flow threshold: <= 3000 gallons per day (DNR regulates facilities with domestic wastewater flow greater than 3,000 gallons per day)

    “In Missouri, different state and local agencies are responsible for regulating wastewater treatment systems.”
  • Septic permitLimited

    Onsite wastewater systems in Carroll County to the extent Missouri state onsite-wastewater rules apply.

    • A construction permit is generally required before installation or repair.
    • Some single-family residential lots may be exempt.
    • For residential property under three acres, the official FAQ states a construction permit is required; the page warns that the exemption framework may differ in some counties.
    • Non-residential onsite systems require a permit regardless of property size.
    • Work should not begin until a permit is issued or an exemption is confirmed.
    • Systems outside DHSS jurisdiction may be regulated by DNR.

    residential property threshold: < 3 acres (official FAQ states a permit is required; county-specific exceptions may apply) · temporary fee suspension effective date: 2026-08-28 (application fees for covered construction, modifications, and repairs are temporarily suspended)

    “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS).”
    One more reviewed finding on this topic
    • Required — Installing or repairing most onsite wastewater treatment systems in Missouri, including residential systems subject to state permitting.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
  • Septic inspectionLimited

    Inspection or evaluation of existing onsite wastewater systems in connection with Missouri real-estate transfers.

    • Local public health agencies generally no longer inspect existing systems for real-estate transfers.
    • A private licensed inspector may perform an inspection or evaluation.
    • A lender, buyer, or other transaction participant may require an assessment.
    • Some local standards may be more stringent than state regulations.
    • Inspections and evaluations are distinct; an inspection includes a hydraulic test, while an evaluation does not.
    “For the most part, local public health agencies no longer inspect existing systems related to real estate transfer. The help of a licensed inspector can be obtained to check the condition of the system.”
  • Off-grid sanitationLimited

    Off-grid domestic wastewater treatment using onsite wastewater treatment systems where central sewer service is unavailable.

    • Onsite systems treat and dispose of domestic sewage on the property where generated.
    • A construction permit is generally required, including for residential property less than three acres, subject to county-specific exceptions.
    • Wastewater may not be discharged into a road ditch or onto the ground.
    • Local permitting authorities may impose additional requirements.

    residential lot threshold: < 3 acres (The exemption does not apply in some counties.)

    “Onsite wastewater treatment systems are sometimes referred to as "septic systems." These systems treat and dispose of domestic sewage on the property where it is generated.”
  • Agricultural exemptionAvailable (with conditions)

    Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures as against county fire-protection or fire-prevention ordinances.

    • The exemption applies to fire protection or fire prevention ordinances adopted by counties in Missouri.
    • The statutory text addresses farm buildings and farm structures; it does not establish a general exemption from every zoning, building-code, floodplain, septic, or other land-use requirement.
    • Effective August 28, 2025.

    effective date: 2025-08-28

    “Notwithstanding any provision of law to the contrary, no fire protection or fire prevention ordinance adopted by any county in this state shall be exercised so as to impose regulations or to require permits with respect to the erection, maintenance, repair, alteration, or extension of farm buildings or farm structures.”
  • Driveway accessRequired

    Construction or modification of driveways within MoDOT right-of-way statewide.

    • A permit is required for construction of driveways and modifications to existing driveways on MoDOT right-of-way.
    • An initial online request must be submitted for each planned listed activity.
    • Engineered plans, traffic studies, hydraulic analysis, traffic-control plans, surety deposits, or performance bonds may be required depending on the work.
    • The rule does not establish a permit requirement for driveways outside MoDOT right-of-way.
    “We require you to obtain a permit to work on MoDOT's Right of Way for: Construction of driveways”
  • Building in a floodplainLimited

    Projects including mining, dredging, building construction, and other dirt-moving activities in designated flood hazard areas within participating Missouri jurisdictions.

    • The source describes local county or city flood damage reduction ordinances rather than one uniform statewide ordinance.
    • The project must be within a participating jurisdiction.
    • The project must be within a designated flood hazard area.
    • The cited rule does not apply if either condition is absent.
    • Covered projects must not raise flood heights.
    “Some jurisdictions (for example, county, city) require any projects in certain floodplains do not raise flood heights.”
  • Permit feesPublished (with conditions)

    Missouri Department of Natural Resources air construction permits statewide.

    • Fees apply to air construction permits, not to every Missouri building or land-use permit.
    • Construction permit fees include a filing fee and an hourly processing fee.
    • The filing fee depends on the type of construction permit.
    • The listed fees are effective January 1, 2026.
    • Fees applicable until December 31, 2025 are available on the Air Construction Permit Fees white sheet.
    • A convenience fee is charged for electronic payment.

    portable source relocation filing fee: 300 USD · minor permit filing fee: 300 USD · minor permit processing fee: per 100 USD (hour) · general permit filing fee: 700 USD · new source review filing fee: 6000 USD (plus $100 per hour processing fee) · prevention of significant deterioration filing fee: 6000 USD (plus $100 per hour processing fee) · hazardous air pollutant filing fee: 6000 USD (plus $100 per hour processing fee) · temporary or pilot filing fee: 250 USD (plus $100 per hour processing fee)

    “Construction permit fees include a filing fee and an hourly processing fee. The filing fee is dependent on the type of construction permit.”
  • Permit processPublished (with conditions)

    Permit applications for work on Missouri Department of Transportation right-of-way statewide.

    • The process applies to MoDOT right-of-way work.
    • Applicants may apply online, contact the area Traffic Specialist, or submit a hard-copy application by mail.
    • Additional documentation may be required depending on the work, including site plans, performance bond, certificate of liability, traffic studies, or a meeting with MoDOT personnel.
    • After issuance, Missouri One Call, a Notice of Intent, permit and approved-plan retention, and Traffic Specialist contact requirements apply.
    • Lane closures require a request at least two working days in advance and authorization before closing lanes.
    • The Traffic Specialist must be contacted at least 48 hours before beginning work and for necessary inspections.

    lane-closure advance request: >= 2 working days (authorization from MoDOT is also required) · Traffic Specialist pre-work contact: >= 48 hours (before beginning work)

    “Contact the Traffic Specialist a minimum of 48 hours prior to beginning work and for all necessary inspections.”
  • county zoning authorityGeneral

    Missouri counties adopting zoning regulations for unincorporated territory.

    • First-class charter counties are empowered under RSMo § 64.090; that section excludes first-class counties without a charter form of government.
    • A first-class noncharter county or a county of the second, third, or fourth class may establish county zoning under RSMo §§ 64.845 to 64.880 only after the zoning question is submitted to county voters and a majority of votes cast favors county zoning.
    • The authority applies to unincorporated portions or territory and does not apply to incorporated portions under § 64.090.
    • Section 64.090 excludes specified agricultural activities and certain farm structures, underground mining, and protects existing lawful uses subject to gradual elimination of nonconforming uses.
    “If a majority of the votes cast is in favor of county zoning, the county commission shall proceed with a program of county zoning”
  • county building authorityLimited

    County regulation of construction and issuance of building permits for buildings, including residential construction, in Missouri counties, with the practical focus on county-controlled areas outside incorporated territory.

    • RSMo § 64.170 grants the authority to counties of the first and second classification only.
    • The authority is subject to subsections 2 and 3.
    • A county that had not adopted a building code before August 28, 2001, under §§ 64.170 to 64.200, lacks authority to adopt one under those sections unless voters approve it.
    • The building-code authority vote is limited to voters in the affected area; a code affecting a county may not be voted on by citizens of incorporated territory.
    • The statute authorizes building regulations, building permits, inspections, licensing rules, and permit, license, and inspection fees.
    “the county commission in all counties of the first and second classification [...] is for this purpose empowered [...] to adopt [...] regulations to control the construction”

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemptions from applicable construction or land-use permits.
  • Inspections — Building inspections in unincorporated Carroll County.
  • Certificate of occupancy — Certificates of occupancy in unincorporated Carroll County.
  • Minimum dwelling size — Minimum dwelling size in unincorporated Carroll County.
  • Building height — General building-height limits in unincorporated Carroll County.
7 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Well permit
  • 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 Carroll County, Missouri

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

Carroll County scores 66/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and sparse surroundings — about 3,424 people within a 30-minute drive.

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

Carroll County requires a building permit only in limited cases (such as floodplains or specific zones), and it enforces county zoning. Onsite septic is permitted by Carroll County Health Department (under Missouri DHSS Onsite Wastewater program). 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 Carroll County, Missouri?

Land in Carroll County runs about $5,366 per acre, based on the latest county data.

What is the water situation in Carroll County?

Carroll County gets about 40.3" of rain a year, with severe drought in roughly 7.5% of years.

How remote is Carroll County?

A representative private-land location has about 3,424 people within a 30-minute drive and 2,503,844 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 Carroll County means bringing your own water and power. The kit we’d start with:

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How Carroll compares in Missouri

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