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 regulates non-agricultural construction through zoning land-use permits, but we could not confirm a separate general building-code permit requirement1. Missouri identifies the Ray County Health Department as Carroll County's contracted septic authority, while development in mapped flood-hazard areas requires a separate county permit23.

At a glance

Building permit
Zoning land-use approval applies; a separate building-code permit is unconfirmed1
Zoning
Yes; five districts cover unincorporated Carroll County45
Septic permit
Required below 3 residential acres; confirm any exemption with Ray County Health Department62
RV living
Not confirmed; ask the county zoning administrator7
Tiny homes
No county-specific occupancy rule confirmed7
Owner-installed septic
Possible in some cases; local approval and a permit may still be required8
Lot size
District minimums range from 1 to 5 acres9
Septic soils
Only 2.5% lack severe limits for a conventional drain field10

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

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 October 12, 2026.

Off-grid gear

Going off-grid in Carroll County means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

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

Unincorporated Carroll County requires zoning land-use review for non-agricultural construction, but the county material does not establish a separate general residential or commercial building-code permit1. Maintenance, repair or remodeling that does not increase building-area coverage needs no permit under the zoning ordinance1. For work that does require land-use approval, submit scaled drawings showing the lot, proposed structures, nearby streets, lakes or streams, uses and number of families; the ordinance provides a two-week plan-review period, and an issued permit remains valid for twelve months111. The Zoning Administrator can issue certificates of occupancy, but the ordinance does not say every project requires one12. Inside Carrollton, the city Building Inspector issues building permits for construction, enlargement and alteration, subject to stated exemptions13. Septic authority is a separate question: Ray County Health Department is Carroll County's contracted authority, but incorporated-city addresses may be referred to Missouri DHSS2.

Who issues Carroll County building and zoning approvals?

Carroll County's Planning & Zoning Commission administers the ordinance, the Zoning Administrator enforces it, and the County Commission oversees Planning and Zoning and sells Planning and Zoning Permits1415. For county zoning questions, start with the County Commission at 8 S Main Street, Carrollton, MO 64633, or 660-542-061516. The zoning fee schedule is kept in the Zoning Administrator's office, and applicable fees must be paid before a land-use permit, certificate or variance is issued17. Missouri identifies the Ray County Health Department, at (816) 776-5413, as the contracted onsite-wastewater authority for Carroll County2. County-road access questions go to Carroll County Road and Bridge at 660-542-229718.

Does Carroll County have zoning?

Yes. Carroll County zoning covers unincorporated land and divides it into AR-1, A, AR-2, C-1 and M-1 districts195. Minimum lots range from 1 acre in C-1 and M-1 to 5 acres in A, with 3-acre minimums in AR-1 and AR-29. Side and rear setbacks vary by district, and highway setbacks include separate centerline and right-of-way measurements20. Maximum building coverage is 10% in AR-1, A and AR-2 and 50% in C-1 and M-121. Agricultural uses and qualifying farm structures have a zoning exemption only under stated conditions; mapped flood-hazard areas are excluded22. Inside Carrollton, city zoning districts govern instead of the county's unincorporated-area districts2315. City zoning does not settle septic jurisdiction; ask Ray County Health Department whether the address falls under its contract or Missouri DHSS2.

How do septic permits work in Carroll County?

Missouri identifies Ray County Health Department as Carroll County's contracted onsite-wastewater authority; incorporated-city addresses may instead be referred to Missouri DHSS2. Missouri's baseline requires a construction permit to install or repair a residential septic system on property smaller than 3 acres, and for non-residential systems regardless of property size6. A larger residential lot is not an automatic exemption: the state warns that exemptions differ by county, so obtain a permit or confirmation of exemption before starting work246. Homeowners may install their own systems in some instances, but must check with the permitting authority and may still need a construction permit8. State law does not require a septic evaluation for every property sale; a buyer- or lender-requested evaluation must be performed by a licensed person25. Only 2.5% of Carroll County soils lack severe limitations for a conventional drain field, so make site evaluation an early purchase contingency10.

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 excludes tents, cabins, trailers and recreational vehicles from that definition14. We could not confirm a general county rule for long-term RV living, temporary camping or tiny-home occupancy, so ask the Zoning Administrator how the proposed unit is classified in the parcel's district. Manufactured homes appear among residential uses in the ordinance, but placement still requires a district-specific answer14. A residence without public water must have a safe and adequate drinking-water supply on the premises26. Any private wastewater system must provide safe sewage disposal and comply with county or Missouri rules, so living off grid does not waive sanitation requirements27.

Building a home in Carroll County: steps in order

  1. Confirm that the parcel is unincorporated, then ask the Zoning Administrator for its district, allowed use, minimum lot size, setbacks and coverage limit492021.
  1. Prepare the scaled lot and structure drawings required for the zoning land-use application11.
  1. Ask for the current fee schedule, applicable inspections and whether the project needs a certificate of occupancy1712.
  1. Contact the Ray County Health Department, Carroll County's contracted authority, to settle septic permitting, any exemption and site feasibility before fixing the house location2.
  1. Check the flood map; development in a special flood-hazard area needs a separate permit before work begins3.
  1. Confirm driveway spacing with zoning and contact Road and Bridge for county-road access; work in MoDOT right-of-way needs a state permit281829.

What should you check before buying Carroll County land?

Start with septic feasibility because only 2.5% of county soils lack severe limitations for a conventional drain field10. Most terrain is gentle, with 96.8% of land at a slope of 15% or less, but an individual parcel can still have drainage or flood constraints30. Check the zoning district, mapped flood hazard, legal access and driveway location before closing; special flood-hazard development requires a separate permit, while county highway classes have different driveway-spacing rules3128. In the Floodplain Overlay District, subdivision proposals must minimize flood damage and provide adequate drainage; proposals larger than 50 lots or 5 acres must include base-flood elevation data32. If public water is unavailable, verify a safe and adequate on-site drinking-water supply26.

Watch-outs

  • County zoning covers unincorporated Carroll County; Carrollton has its own building permits and zoning151323.
  • RV occupancy, temporary camping and tiny-home occupancy are not confirmed; ask the zoning administrator before moving a unit onto the parcel7.
  • A farm-building zoning exemption does not extend into mapped flood-hazard areas33.
  • A residential lot of 3 acres or more does not establish a septic exemption; confirm eligibility with Ray County Health Department before installation or repair62.
  • County permit fees vary, and the current schedule is available from the Zoning Administrator17.

Sources

  1. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  2. OWTS Construction Permit Required, quoted and re-checked
  3. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  4. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  5. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  6. health.mo.gov, quoted and re-checked
  7. Zoning Regulations for Carroll County, Missouri (2026 county census)
  8. health.mo.gov, quoted and re-checked
  9. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  10. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  11. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  12. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  13. Carrollton: Article I Fire Limits And Plans And Permits (Carroll County), quoted and re-checked
  14. Carroll County Planning & Zoning Commission (Zoning Administrator) (carrollcountymo.gov)
  15. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  16. Carroll County Commission (carrollcountymo.gov)
  17. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  18. Carroll County Road and Bridge Department (carrollcountymo.gov)
  19. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  20. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  21. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  22. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  23. Carrollton: Town of Carrollton, MO Code of Ordinances (Carroll County), quoted and re-checked
  24. OWTS Construction Permit Process, quoted and re-checked
  25. health.mo.gov, quoted and re-checked
  26. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  27. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  28. carrollcountymo.gov, quoted and re-checked
  29. Permits | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked
  30. Share of land at 15% slope or less: Bolthole Index county data
  31. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  32. Zoning Regulations for Carroll County, Missouri, quoted and re-checked
  33. Zoning Regulations for Carroll County, Missouri, quoted and re-checked

Written October 12, 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.

Found land here? Start a Property Hunt →

Compared with neighboring counties

Unlike all 6 of its neighbors, Carroll County requires a building permit only in limited cases.

RuleCarroll CountySaline CountyChariton CountyRay CountyLafayette CountyLivingston CountyLinn County
Building permitLimitedNot requiredNot requiredRequiredRequiredRequiredNot required
County zoningYesNoNot publishedYesYesYesNo
Septic permitsCounty Health Dept.DHSSDHSSCounty Health Dept. Env. HealthCounty Planning & Economic DevelopmentDHSSDHSS

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%Soils rated "not limited" for septic (strict USDA rating)
10,778 acWorkable land screen
15.7%Wooded land
34.4 tonsBiomass / forest ac
54°FAvg temp

Scout Carroll County

Camp here before you commitBook a few nights nearby on Hipcamp →Already own land here?Earn money hosting campers — get $100 when you become a Hipcamp host →

Some links are affiliate or referral links — we may earn a commission, at no cost to you.

Property hunt

Find land. Bring the promising ones back.

Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.

View your full hunt →
ZillowLand & lotsRealtor.comLand listingsLandSearchRural & vacant land

Each button opens a current land search for Carroll County. Listing sites control their own results and filters.

Analyze a property
Add setup-cost allowances

Use rough quotes or placeholders. Blank fields count as $0.

Working estimate

—land + entered setup costs
Asking $ / acre
—
Setup allowance
—
All-in $ / acre
—

A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

Before an offer

Parcel due diligence

0/8 checked

Saved properties and checklist progress stay on this device. Bolthole Index does not receive them.

Cities and towns in Carroll County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Bogard · Bosworth · Carrollton Township · Combs Township · De Witt · De Witt Township · Egypt Township · Eugene Township · Fairfield Township · Hale · Hill Township · Hurricane Township · Leslie Township · Moss Creek Township · Norborne · Prairie Township · Ridge Township · Rockford Township · Stokes Mound Township · Sugartree Township · Village of Tina · Trotter Township · Van Horn Township · Wakenda Township · Washington Township

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

    Construction of non-agricultural structures and land uses in unincorporated Carroll County.

    • The county source establishes zoning and land-use permitting, not a general residential or commercial building-code permit requirement.
    • No permit is required under the zoning ordinance for maintenance, repair, or remodeling where building-area coverage is not increased.
    • Applications must include scale maps or drawings showing the lot, proposed structures, relation to abutting streets, lakes, or streams, existing and proposed uses, and number of families accommodated.
    • A two-week inspection period applies before a permit is issued.
    • Permits are valid for twelve months after issuance; an extension may be granted if construction has not started.
    • Permits may be revoked for misrepresentation, ordinance or legal violations, or violation of permit terms and conditions.
    • Incorporated municipalities may have separate requirements.

    permit validity: 12 months (extension may be granted by the Zoning Administrator) · plan inspection period: 2 weeks

    “comprehensive zoning regulations for the unincorporated areas of Carroll County, Missouri [...] regulating therein the uses of land and the construction of all non-agricultural structures”
  • Certificate of occupancyLimited

    Certificates of occupancy administered under the county zoning ordinance.

    • The Zoning Administrator's listed administrative functions include issuing certificates of occupancy.
    • The source does not state that every structure requires one.
    “Administrative functions shall include, but not be limited to, the duty to: a. Provide necessary forms and applications: b. Issue land use permits upon demonstration of the applicant’s compliance with the provisions of this Ordinance; c. Issue Certificates of Occupancy; d. Issue any authorized permits;”
  • County-wide zoningPresent

    Zoning regulation in the unincorporated areas of Carroll County.

    • The ordinance is limited to unincorporated areas.
    • The ordinance was adopted by the Carroll County Commission on May 23, 2008 and states that it replaces prior zoning ordinances.
    • The ordinance is administered through the Carroll County Planning & Zoning Commission.
    “An Order establishing comprehensive zoning regulations for the unincorporated areas of Carroll County, Missouri, in accordance with the provisions of Revised Statutes of Missouri Chapter 64, as amended, and all acts amendatory thereof, to promote the health safety, convenience, and general welfare of the residents of Carroll County, Missouri, by dividing the county into zones and regulating therein the uses of land and the construction of all non-agricultural structures with a view toward encouraging the most appropriate use of land, and to recognize and maintain the economic and appropriate uses of land, and to recognize and preserve the economic and natural environmental values of all lands within Carroll County, Missouri.”
    One more reviewed finding on this topic
    • Present (with conditions) — Comprehensive zoning regulations for the unincorporated areas of Carroll County.
      “An Order establishing comprehensive zoning regulations for the unincorporated areas of Carroll County, Missouri”
  • Local zoningPresent (with conditions)

    County zoning regulations administered by Carroll County for unincorporated areas of Carroll County, Missouri.

    • The ordinance applies to the unincorporated areas of Carroll County.
    • The regulations divide the county into zones and regulate land uses and construction of non-agricultural structures.
    • Agricultural uses and certain farm buildings or structures are exempted under the ordinance, subject to the stated floodplain and official flood-hazard-map exception.
    • The order is administered through the Carroll County Planning & Zoning Commission.
    • The county commission page states that the County Commission oversees Planning and Zoning and sells Planning and Zoning Permits.
    “For the purposes of this Ordinance, the unincorporated areas of the County are hereby divided into zoning districts, as shown on the Official Zoning Map which, together with all explanatory matter thereon and amendments, is hereby incorporated by reference and declared to be a part of this Ordinance.”
  • Zoning districtsPublished (with conditions)

    County zoning districts and their dimensional schedules.

    • The ordinance identifies AR-1, A, AR-2, C-1, and M-1 districts.
    • The official zoning map and ordinance provisions govern district boundaries.
    “Said districts shall be know as: AR-1 Agricultural/Residency District A Agricultural District AR-2 Agricultural/Recreational District C-1 Highway Commercial Service District M-1 Manufacturing District FP Flood Plain Overlay District”
  • Minimum lot sizeSpecified

    Lots in county zoning districts.

    • AR-1: 3 acres; A: 5 acres; AR-2: 3 acres; C-1: 1 acre; M-1: 1 acre.
    • The ordinance's most restrictive applicable lawful requirement governs.

    AR-1 minimum lot area: 3 acres · A minimum lot area: 5 acres · AR-2 minimum lot area: 3 acres · C-1 minimum lot area: 1 acre · M-1 minimum lot area: 1 acre

    “AR-1 200 Ft 3 Acres 10% 50 75 A 300 Ft 5 Acres 10% 50 75 AR-2 300 Ft 3 Acres 10% 50 75 C-1 200 Ft 1 Acre 50% 10 35 M-1 200 Ft 1 Acre 50% 20 40”
  • SetbacksSpecified

    Side, rear, highway, roadway, and access-driveway setbacks under county zoning.

    • District side/rear setbacks: AR-1 50/75 feet; A 50/75 feet; AR-2 50/75 feet; C-1 10/35 feet; M-1 20/40 feet.
    • Class A highways require 100 feet from centerline or 30 feet from right-of-way, whichever is greater.
    • Class B highways and specified streets require 63 feet from centerline or 30 feet from right-of-way, whichever is greater.
    • Access driveways to Class A highways must be 150 feet apart for separate land uses.
    “The setback for Class B highways and for streets other than major and arterial roads designated as such on official maps in effect in the County shall be 63 feet from the center line on the highway or 30 feet from the right-of-way line, whichever is greater.”
  • Lot coverageSpecified

    Maximum building coverage in county zoning districts.

    • AR-1, A, and AR-2 maximum coverage is 10%.
    • C-1 and M-1 maximum coverage is 50%.
    • Coverage includes accessory buildings where the district provision states so.

    AR-1/A/AR-2 maximum coverage: 10 percent · C-1/M-1 maximum coverage: 50 percent

    “AR-1 200 Ft 3 Acres 10% 50 75 A 300 Ft 5 Acres 10% 50 75 AR-2 300 Ft 3 Acres 10% 50 75 C-1 200 Ft 1 Acre 50% 10 35 M-1 200 Ft 1 Acre 50% 20 40”
  • Who permits septicLocal (with conditions)

    Onsite wastewater treatment permitting for Carroll County, as identified by the Missouri Department of Health and Senior Services.

    • The state source identifies Ray County Health Department as the contract authority for Carroll County.
    • Contact the permitting authority for instructions; the source states that the application process varies by permitting authority.
    • A construction permit is required before installing or repairing most onsite wastewater treatment systems, but some single-family residential lots may be exempt.
    • DHSS regulates single-family residential systems and onsite or cluster systems treating domestic wastewater flows of 3,000 gallons per day or less and dispersing wastewater through soil treatment or absorption systems.
    • DNR regulates other systems, including non-single-family lagoons, systems discharging to surface waters, systems over 3,000 gallons per day, and industrial wastewater.
    • DNR approval is required for subdivisions, mobile home parks, and campgrounds using onsite wastewater treatment.
    • Incorporated cities may not fall under the local permitting authority and may be referred back to DHSS.

    domestic wastewater flow threshold: <= 3000 gallons per day (systems outside this category may fall under DNR) · temporary permit fee suspension effective date: 2026-08-28 (state page says application fees are temporarily suspended due to changes to RSMo 701.046)

    “Agency: Ray County Health Dept. Authority Type: Contract Address: 820 E. Lexington Richmond, MO 64085 County: Carroll Phone: (816) 776-5413”
  • Off-grid sanitationLimited

    Private wastewater disposal systems serving buildings in unincorporated Carroll County.

    • Safe and adequate sewage disposal is required.
    • Private systems must meet regulations adopted by the County Commission or Missouri DNR.
    • Other applicable state wastewater rules and permits may apply.
    “The County Zoning Administrator shall not hereafter authorize a building to be erected, structurally altered, or relocated which has a private waste disposal system unless the system meets those regulations in force and effect which may, from time to time, be adopted by the County Commission or by the Missouri Department of Natural Resources.”
  • Mandatory utility hookupConditional

    Residential development under the county zoning ordinance where public water or sewer is unavailable.

    • A principal building requires safe and adequate water supply and sewage-disposal facilities.
    • If not connected to public water, residential use requires a safe and adequate drinking-water supply on the premises.
    • Private wastewater systems must comply with county or Missouri DNR rules.
    “Where connection is not made to a public water system, no residential use shall be permitted unless provision is made for a safe and adequate supply of drinking water located on the premises.”
  • Agricultural exemptionAvailable (with conditions)

    Agricultural uses and farm buildings or structures in unincorporated Carroll County.

    • Agricultural uses are exempted from zoning under the ordinance's definition.
    • The exemption covers raising livestock, crops, orchards, forestry, and specified seasonal or temporary impoundments.
    • The exemption for farm buildings or farm structures applies only when the area is not within the County's official flood-hazard area map.
    • Floodplain zones are excepted from the agricultural-use exemption.
    “Agricultural Use: Any use of land defined for purposes of Section 64.620 RSMo which is specifically exempted from zoning regulations, and which fits the said description as the raising of livestock, crops, orchards, or forestry, or to seasonal or temporary impoundments used for rice farming or flood irrigation, with the exception of the floodplain zones”. Agricultural uses also exempted from zoning include the erection, maintenance, repair, alteration, extension of farm buildings or farm structures used for such purposes in an area not within the area shown on the County’s official flood hazard area map.”
    One more reviewed finding on this topic
    • Available (with conditions) — Agricultural uses and specified farm buildings or structures outside mapped floodplain areas.
      “Agricultural uses also exempted from zoning include the erection, maintenance, repair, alteration, extension of farm buildings or farm structures used for such purposes in an area not within the area shown on the County’s official flood hazard area map.”
  • Subdividing landLimited

    Subdivision proposals and other proposed new developments, including manufactured home parks or subdivisions, located in areas governed by Carroll County's Floodplain Overlay District.

    • The cited subdivision standards are in the Floodplain Overlay District and therefore do not establish a countywide subdivision-approval regime outside applicable flood-hazard areas.
    • Subdivision proposals must be consistent with minimizing flood damage.
    • Public utilities and facilities, including sewer, gas, electrical, and water systems, must be located and constructed to minimize flood damage.
    • Adequate drainage must be provided to reduce exposure to flood hazards.
    • Base flood elevation data is required for subdivision proposals and other proposed development greater than either 50 lots or 5 acres.

    base flood elevation data threshold: more than 50 lots or 5 acres

    “This Ordinance shall apply to all areas of special flood hazards [...] All subdivision proposals shall have adequate drainage provided”
  • Driveway accessRequired

    Access driveways to Class A highways from abutting properties.

    • Separate land uses on Class A highways must have access driveways at least 150 feet apart.
    • Class B highway driveway spacing is 75 feet apart.

    Class A driveway spacing: 150 feet (Between access driveways for separate land uses.) · Class B driveway spacing: 75 feet (Between access driveways for separate land uses.)

    “Minimum Distance of Highway Frontage Between Access Driveways For Separate Land Uses Class of Highway For Separate Land Uses Class A Highways 150 ft apart Class B Highways 75 ft apart”
  • Building in a floodplainRequired

    Development in areas of special flood hazard under the county floodplain overlay.

    • The floodplain ordinance applies to all areas of special flood hazards within county jurisdiction.
    • Floodplain subdivision and development proposals must satisfy the ordinance's drainage, utility, elevation, and flood-damage-minimization requirements.
    • Variances may be available under the ordinance.
    “No structure or land shall hereafter by constructed, located, extended, converted, or altered without full compliance with the terms of this Ordinance and other applicable regulations.”
    One more reviewed finding on this topic
    • Required — Construction, development, or substantial improvement within areas of special flood hazard established by the county ordinance.
      “A Development Permit shall be obtained before construction or development begins within any area of special flood hazard established in Section 13.17. No person, firm, or corporation or unit of government shall initiate any development or substantial improvement or cause the same to be done without first obtaining a separate permit for each development as defined in Section 13.14.”
  • Permit feesVariable (with conditions)

    Fees for permits, certificates, appeals, and other zoning actions.

    • The County Commission establishes the fee schedule.
    • The schedule is available in the Zoning Administrator's office.
    • No permit, certificate, or variance is issued until applicable fees are paid in full.
    “The County Commission shall establish a schedule of fees, charges and expenses for permits, certificates, appeals, and other documents and actions required by the provisions of this ordinance.”
  • Permit processPublished (with conditions)

    County zoning land-use permit process.

    • Applications must include scaled maps or drawings showing lot and proposed-structure details, abutting streets, lakes or streams, proposed uses, and number of families.
    • The Zoning Administrator issues land-use permits after compliance is demonstrated.
    • Fees must be paid before issuance.
    “Applications shall be accompanied by scale maps or drawings showing accurately the location, size and shape of the lot(s) involved and of any proposed structures, including the relation to abutting streets, lakes or streams, and the existing and proposed use of each structure and lot, and the number of families to be accommodated.”

Missouri rules that apply here

  • Owner-builder exemptionConditional

    A Missouri homeowner installing the homeowner's own onsite wastewater treatment system, including in Carroll County subject to the local permitting authority.

    • Homeowner self-installation is available only in some instances.
    • The homeowner must check with the local permitting authority.
    • A construction permit may still be required.
    • The state encourages use of a registered installer.
    “In some instances, homeowners may install their own system. However, you must check with the local permitting authority. Additionally, a construction permit may be required.”
  • 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”
    2 more reviewed findings on this topic
  • 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).”
    4 more reviewed findings on this topic
    • Required — Missouri onsite wastewater systems, including Carroll County to the extent the state baseline applies.
      “A construction permit is required to install or repair an onsite system on any residential property less than three acres. (This exemption does not apply in some counties; check with the county authority.) Regardless of the size of the property, a permit is necessary for all other onsite systems that serve non-residential structures.”
    • 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.”
    • Required — Installing or repairing most onsite wastewater treatment systems statewide in Missouri.
      “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.”
    • Required — Proposed campgrounds, mobile home parks, and subdivisions planning to use onsite wastewater treatment systems anywhere in Missouri.
      “DNR must approve subdivisions, mobile home parks and campgrounds if the use of OWTS is planned.”
  • 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.”
    2 more reviewed findings on this topic
    • Not required — Inspection or evaluation of an onsite wastewater system before a real-estate transaction under state law.
      “No. However, if a lender or buyer requests an inspection/evaluation, it must be conducted by a licensed individual. Some counties may require an onsite system inspection/evaluation for every real estate transaction. Check with the local permitting authority.”
    • Limited — Inspections of existing onsite sewage systems in connection with property sales statewide in Missouri.
      “Missouri Department of Health and Senior Services' (DHSS) rules governing onsite sewage systems cover minimum construction requirements, system inspections at the time of property sales, and requirements for percolation testers and soil evaluators.”
  • Well permitLimited

    Construction or alteration of a public well serving a Missouri public water system.

    • Public water systems must receive written approval from the Missouri Department of Natural Resources Public Drinking Water Branch before constructing or altering a public well.
    • The requirement does not apply when the system meets the charitable-and-benevolent-organization exemptions in section 640.116, RSMo.
    • Anyone proposing to install a public well must contact the department’s regional office for a well-site survey.
    • The survey addresses minimum isolation or setback distances from known or potential contaminant sources, including septic tanks, sanitary sewer lines, and landfills.
    • Before applying for construction authorization, the public water system must obtain an estimated casing-depth letter from the Missouri Geological Survey Water Resources Center.
    • There is no fee for the well-site-survey and estimated-casing-depth-letter services.
    • Failure to obtain construction authorization may result in approval delays and possibly require the owner to properly plug the well and drill a new one according to 10 CSR 60-3.

    public water system threshold: at least 15 service connections or regularly serves an average of at least 25 individuals daily, at least 60 days per calendar year

    “Public water systems must receive written approval from the PDWB before constructing or altering a public well”
    2 more reviewed findings on this topic
    • Required — A person or contractor conducting regulated work to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a water well, heat-pump well, monitoring well, or related well in Missouri.
      “A non-restricted permit is required to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a well.”
    • Limited — Construction or repair of water wells, installation or replacement of pumps, and associated plumbing and electrical work in Missouri.
      “A non-restricted water well installation permit is required to construct or repair a water well in Missouri.”
  • county zoning authorityLimited

    Missouri county zoning authority over unincorporated land.

    • RSMo § 64.850 applies to counties of the first class without a charter and counties of the second, third, or fourth class.
    • RSMo § 64.620 applies to counties of the second or third class to which §§ 64.510–64.690 apply.
    • Adoption under §§ 64.510–64.690 requires approval by vote of the people under § 64.530.
    • The authority applies in unincorporated portions and not incorporated portions.
    • The regulations must be in accordance with a comprehensive plan.
    • Under § 64.090, the zoning power does not apply to raising crops, livestock, orchards, or forestry; seasonal or temporary rice-farming or flood-irrigation impoundments; specified farm structures outside mapped flood-hazard areas; or underground mining entered through shafts outside mapped flood-hazard areas.
    • Existing lawful uses and specified public-utility services are protected under the cited statutory schemes.
    “the county commission of any county of the first class not having a charter form of government, or of any county of the second, third or fourth class may, after approval by vote of the people as provided in section 64.845, regulate and restrict, by order of record, in the unincorporated portions of the county, the height, number of stories, and size of buildings, the percentage of lots that may be occupied, the size of yards, courts and other open spaces, the density of population, the location and use of buildings, structures and land for trade, industry, residence or other purposes.”
    2 more reviewed findings on this topic
  • county building authorityLimited

    County authority to regulate residential construction and issue building permits in unincorporated areas of Missouri.

    • The authority under sections 64.170 to 64.200 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 one under those sections.
    • Only voters in the area affected by the proposed code may vote; incorporated-territory citizens cannot vote on a code affecting a county.
    • The county commission must hold at least three public hearings and provide the statutory newspaper publication and county posting notices before adoption.
    • Regulations adopted under section 64.180 apply to unincorporated territory, except as otherwise provided.
    • Adopted or amended codes after August 28, 2001, must use a current, calendar year 1999 or later edition of a nationally recognized building code, as amended.
    • A county building ordinance may not conflict with liquefied petroleum gas installations governed by section 323.020.

    public hearings before adoption: >= 3 hearings minimum (Section 64.180(3)) · newspaper notice: >= 15 days (Notice of hearing time and place must be published in at least two newspapers having general circulation within the county) · posted notice: >= 15 days (Notice must be posted in four conspicuous places in the county) · minimum nationally recognized building-code edition: >= calendar year 1999 edition year (Applies after August 28, 2001, under section 64.180)

    “The regulations adopted shall be applicable to the unincorporated territory of the county, except as otherwise provided herein”
    2 more reviewed findings on this topic
    • Limited — 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.
      “the county commission in all counties of the first and second classification [...] is for this purpose empowered [...] to adopt [...] regulations to control the construction”
    • Limited — Missouri counties' authority to require permits and regulate residential construction in unincorporated areas.
      “Before the adoption of such code of regulations, the county commission shall hold at least three public hearings thereon”

Still unanswered

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

  • Inspections — Building inspections in unincorporated Carroll County.
  • Minimum dwelling size — Minimum floor area or dwelling-size requirements in unincorporated Carroll County.
  • Building height — General building-height limits in unincorporated Carroll County.
  • Living in an RV — Long-term or residential occupancy of recreational vehicles on private land in unincorporated Carroll County.
  • Camping on your land — Temporary camping on private land in unincorporated Carroll County.
4 more unanswered
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • 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). 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 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.

How Carroll compares in Missouri

Compare side-by-side →See all 115 Missouri counties ranked →