Bolthole Index

Callaway County, Missouri

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

65Index Score / 100
#84 of 115 in Missouri

Callaway County, Missouri has not adopted planning or zoning, and no occupancy permit or building permit is required in its unincorporated areas12. Three county contacts still matter before you build: a sewage-ordinance contact for septic, a floodplain-ordinance contact if your land is in a mapped flood zone, and the Road and Bridge Engineer for any driveway crossing a county road3. Septic is handled locally under Missouri's statewide onsite wastewater rules, and soils here are unusually difficult: essentially none of the county's land is free of severe limitations for a conventional drain field45. Incorporated cities such as Fulton, Holts Summit, and Auxvasse have their own separate zoning and permit rules that don't apply outside their limits6.

At a glance

Building permit
Not required in unincorporated Callaway County; incorporated cities may require their own1
Zoning
None countywide; Callaway County has not adopted planning or zoning2
Septic permits
Local sewage-ordinance contact under Missouri DHSS onsite wastewater rules4
Owner-builder
Yes: with no county building permit, there is no permit to be exempt from7
Minimum home size / lot size / setbacks
None set by the county in unincorporated areas8910
Driveway / utility road crossing
Right-of-Way Access Permit required from Road and Bridge before any driveway or utility line crosses a county road1112
Water well permit
Landowners may install their own well or pump without a permit statewide13
Septic soil difficulty
Only 0.1% of county soils are free of severe limits for a conventional drain field5

Who to call

Septic permits

Callaway County Sewage Ordinance Contact

Questions about the county's sewage ordinance and septic administration for new construction in unincorporated Callaway County; leave a message

573-491-1118

Floodplain permits

Callaway County Floodplain Ordinance Contact

Questions about the county's flood plain ordinance for new construction in unincorporated Callaway County; leave a message

573-592-2480

Roads & driveways

Callaway County Road and Bridge Engineer

Right-of-Way Access (driveway) permits and Utility Right-of-Way permits for lines crossing a county road; leave a message

573-642-0740

Contact details are copied from each office’s official page and were checked against it on September 23, 2026.

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

No. Callaway County has not adopted planning or zoning, and no occupancy permit or building permit is required in unincorporated areas of the county13. Missouri law only gives counties of the first and second classification the authority to control construction and issue building permits, and even then, a county that hadn't adopted a building code before August 28, 2001 needs voter approval to adopt one14. Because Callaway County runs no building-permit program, there's also no certificate of occupancy required in unincorporated areas15. That's different once you cross into an incorporated city or village: Fulton, Holts Summit, Lake Mykee, New Bloomfield, Mokane, Kingdom City, and Auxvasse may each have their own planning, zoning, building-permit, and occupancy-permit requirements6. Two things do still require a county permit even outside city limits: a Right-of-Way Access Permit before building any driveway onto a county road, and a Utility Right-of-Way permit before running water, phone, or electrical lines across one1112.

Who handles septic, floodplain, and road questions in Callaway County?

There's no building department to call, since Callaway County runs no building-permit program3. For septic system questions under the county's sewage ordinance, the designated contact is reachable at 573-491-1118, with a request to leave a message due to high call volumes16. If your land is in a mapped flood zone, the county's floodplain-ordinance contact can be reached at 573-592-248017. For any new driveway onto a county road, or a utility line crossing one, the Road and Bridge Engineer at 573-642-0740 issues the required Right-of-Way Access Permit and Utility Right-of-Way permit18. The county's own planning-and-zoning page notes this information has been current and unchanged since 2022, and it asks that residents not call simply to verify it, since the posted page and signed PDF are both kept current3.

Does Callaway County have zoning?

No. Callaway County has not adopted planning or zoning countywide, which is a direct statement from the county commission itself, not an inference from silence219. Missouri law lets a non-charter county establish zoning under RSMo §§ 64.845 to 64.880, but only after county voters approve the question in an election, and Callaway County has not been shown to have done so20. Because there's no county zoning, unincorporated Callaway County has no minimum dwelling size, no minimum lot size, no setbacks, no lot-coverage limit, and no building-height limit set by the county89102122. One exception applies inside the county's MS4 stormwater management area (unincorporated land within the Jefferson City Urban Area and any adopted buffer): site plans, subdivisions, and grading disturbing an acre or more need to follow the county's MS4 stormwater regulations, though projects exclusively for agricultural or silvicultural uses are exempt2324. Zoning is a real factor only inside the county's incorporated cities and villages, including Fulton, which has its own zoning map and rezoning process6.

How do septic permits work in Callaway County?

Septic systems in Callaway County are handled locally, through the county's sewage-ordinance contact, under Missouri's statewide onsite wastewater treatment system (OWTS) rules administered by the county health department4. Statewide, a construction permit is required before installing or repairing most OWTS, and while some single-family lots under three acres can be exempt, that exemption doesn't apply in every county, so check directly rather than assume it covers your parcel25. Soils make this the single most important thing to check before buying land here: only 0.1% of Callaway County's land is free of severe limitations for a conventional septic drain field, among the most difficult septic soils in this dataset5. That means a professional site evaluation isn't optional, and many properties will need an engineered or alternative system rather than a standard gravity drain field. Missouri no longer requires local health agencies to inspect existing systems for real-estate transfers, so if you're buying a property with an existing septic system, hire a private licensed inspector to check its actual condition rather than assuming the county has already verified it26.

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

With no countywide zoning ordinance, Callaway County sets no zoning-based rule against RV, tiny-home, or accessory-dwelling occupancy in unincorporated areas2. That said, no official source reviewed for this guide specifically confirms RV living, tiny-home occupancy, or temporary camping on ordinary private land, so these remain open questions rather than settled permissions; ask the county commission directly if your plan depends on the answer. Missouri's floodplain and OWTS rules would still apply if you place any structure, including an RV used as a residence, on land in a mapped flood zone or connect it to a sewage system27. If you're inside an incorporated city rather than unincorporated Callaway County, that city's own zoning and occupancy rules govern instead, and they can be considerably more restrictive6.

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

First, confirm whether your parcel is unincorporated or inside a city like Fulton, Holts Summit, or Auxvasse, since incorporated areas have their own separate planning, zoning, and permit rules6. Second, given how difficult the county's soils are for septic, order a site evaluation early and apply through the county's sewage-ordinance contact before finalizing your house design165. Third, if your land is in a mapped flood zone, contact the county's floodplain-ordinance contact before construction begins17. Fourth, if you need a new driveway onto a county road, or a utility line crossing one, apply for the Right-of-Way Access Permit or Utility Right-of-Way permit through the Road and Bridge Engineer, and expect culvert pipe sizing and length requirements to apply1811. Fifth, if you need a water well, you may install your own well or pump without a state permit, though a licensed contractor is required if someone else does the work for you13. Finally, build: unincorporated Callaway County requires no building permit, inspection, or certificate of occupancy for an ordinary home115.

What to check before you buy land in Callaway County

Soils are the single biggest thing to verify here: with only 0.1% of Callaway County's land free of severe limitations for a conventional septic drain field, budget for a professional site evaluation and likely an engineered system before you commit to any parcel5. The land itself is gentle, with 74.1% at 15% slope or less, and about half wooded at 47.3%, so grading typically isn't the limiting factor here the way septic soils are2829. Water availability runs about 42.4 inches of precipitation a year with drought in 7% of years, so plan your well accordingly, remembering that landowners can install their own well without a state permit303113. Check FEMA flood maps and confirm with the county's floodplain-ordinance contact if there's any doubt, since state and local floodplain rules apply on top of the county's general no-permit stance27. If the parcel is inside the MS4 stormwater area near Jefferson City, confirm whether any planned site work or subdivision disturbs an acre or more, which would trigger the county's stormwater regulations23. Typical property tax runs about 0.8% effectively, with a median bill near $1,549 a year, against a typical home value around $277,802323334.

Watch-outs

  • Callaway County's soils are exceptionally difficult for septic: only 0.1% of the county's land is free of severe limitations for a conventional drain field, so a site evaluation should happen before you make an offer, not after5.
  • No official source confirms RV living, tiny-home occupancy, accessory-dwelling rules, or temporary camping on ordinary private land in unincorporated Callaway County; the absence of zoning doesn't guarantee these are unregulated, so confirm with the county commission before relying on it2.
  • Incorporated cities and villages inside Callaway County, including Fulton, Holts Summit, and Auxvasse, run their own separate planning, zoning, and permit rules that are more restrictive than the county's no-permit unincorporated default; confirm which side of the city line your parcel is on6.

Sources

  1. Callaway County Planning and Zoning Information (2026 county census)
  2. Callaway County Planning and Zoning Information (2026 county census)
  3. Callaway County Planning and Zoning Information, quoted and re-checked
  4. Missouri DHSS — Onsite Wastewater Treatment (2026 county census)
  5. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  6. Callaway County Planning and Zoning Information, quoted and re-checked
  7. Callaway County Planning and Zoning Information (2026 county census)
  8. Callaway County Planning and Zoning Information, quoted and re-checked
  9. Callaway County Planning and Zoning Information, quoted and re-checked
  10. Callaway County Planning and Zoning Information, quoted and re-checked
  11. Appendix B — Driveway Locations and Culverts, quoted and re-checked
  12. Callaway County Planning and Zoning Information, quoted and re-checked
  13. Water Wells - PUB2945, quoted and re-checked
  14. RSMo § 64.170 — County commissions control construction and issue building permits (Missouri statewide rule), quoted and re-checked
  15. Callaway County Planning and Zoning Information, quoted and re-checked
  16. Callaway County Sewage Ordinance Contact (callawaycounty.org)
  17. Callaway County Floodplain Ordinance Contact (callawaycounty.org)
  18. Callaway County Road and Bridge Engineer (callawaycounty.org)
  19. Callaway County Planning and Zoning Information, quoted and re-checked
  20. RSMo § 64.090 — Planning and zoning powers of county commission (Missouri statewide rule), quoted and re-checked
  21. Callaway County Planning and Zoning Information, quoted and re-checked
  22. Callaway County Planning and Zoning Information, quoted and re-checked
  23. Callaway County MS4 Stormwater Regulations, quoted and re-checked
  24. Callaway County MS4 Stormwater Regulations, quoted and re-checked
  25. OWTS Construction Permit Process (Missouri statewide rule), quoted and re-checked
  26. Onsite Wastewater Treatment System Inspections Versus Evaluations (Missouri statewide rule), quoted and re-checked
  27. Laws and Regulations That Might Affect You if You Mine Sand or Gravel From Missouri Streams (Missouri statewide rule), quoted and re-checked
  28. Share of land at 15% slope or less: Bolthole Index county data
  29. Wooded share of land: Bolthole Index county data
  30. Annual precipitation: Bolthole Index county data
  31. Share of years in severe drought: Bolthole Index county data
  32. Effective property tax rate: Bolthole Index county data
  33. Median property tax bill: Bolthole Index county data
  34. Typical home value (Zillow): Bolthole Index county data

Written September 23, 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

Callaway County in Missouri

65
County map
Callaway County highlighted among the Missouri counties · colored by Index score

How Callaway County scores

Seclusion35100% ev.
Self-Sufficiency63100% ev.
Admin Boringness94100% ev.
Durability56100% ev.
Property Autonomy47100% ev.
Carry Cost77100% 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 →

$278kTypical home
0.8%Property tax
$4,653Land / acre
42.4"Annual rain
7% of yrsSevere drought
14.1 / yr (+11.7)Mid-century 100°F days
15.8 daysMid-century dry spell
1.97" (+7.2%)Mid-century 1-day rain
1.81×Wildfire change factor
100%Forward climate coverage
$1,909Home insurance / yr
2.5% / yrInsurance growth
1.26%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
136,996People within 30 min
2,825,857People within 2 hr
34,477Radius comparison (15 mi)
53.6People / sq mi
2.4%Federal land
74.1%Land at 15% slope or less
0.1%Septic soil without severe limits
459 acWorkable land screen
47.3%Wooded land
49.8 tonsBiomass / forest ac
54.9°FAvg temp

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Answers from the rulebook for Callaway County

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

Callaway County rules

  • Building permitNot required

    New construction and building activity in unincorporated areas of Callaway County.

    • Incorporated cities and villages may have their own planning, zoning, building-permit, and occupancy-permit requirements.
    • A separate Utility Right-of-Way permit is required when lines such as water, phone, or electrical lines cross a county road.
    “No occupancy permits or building permits are required in unincorporated areas of Callaway County.”
  • Owner-builder exemption · follows from the permit answerNot needed

    Unincorporated Callaway County: no county building permit is required, so there is no permit to be exempt from and you may build your own home. State licensing for electrical, plumbing and HVAC work may still apply.

    • Incorporated cities and villages may have their own planning, zoning, building-permit, and occupancy-permit requirements.
    • A separate Utility Right-of-Way permit is required when lines such as water, phone, or electrical lines cross a county road.
    “No occupancy permits or building permits are required in unincorporated areas of Callaway County.”
  • Certificate of occupancyNot required

    Occupancy permits or certificates of occupancy for property in unincorporated areas of Callaway County.

    • Incorporated cities and villages may have their own occupancy-permit requirements.
    “No occupancy permits or building permits are required in unincorporated areas of Callaway County.”
  • County-wide zoningAbsent

    County-administered planning and zoning throughout Callaway County.

    • The county statement concerns county-adopted planning or zoning; incorporated municipalities may have separate local regulations.
    “Callaway County has not adopted planning or zoning.”
  • Local zoningVaries (with conditions)

    Aggregate local-zoning situation across Callaway County, including unincorporated areas and incorporated municipalities; the county itself does not administer each municipal ordinance.

    • Unincorporated areas lack county-adopted planning and zoning.
    • The county identifies Fulton, Holts Summit, Lake Mykee, New Bloomfield, Mokane, Kingdom City, and Auxvasse as incorporated areas that may have planning and zoning regulations.
    • Fulton’s official site confirms city zoning and provides a zoning map and rezoning application.
    “A map of the city’s zoning can be found here.”
    One more reviewed finding on this topic
    • Absent — County zoning and planning requirements in unincorporated areas of Callaway County.
      “Callaway County has not adopted planning or zoning. [...] No occupancy permits or building permits are required in unincorporated areas of Callaway County.”
  • Zoning districtsNot published

    County zoning districts in unincorporated Callaway County.

    • This absence finding is limited to county zoning; incorporated areas may have planning and zoning regulations.
    “Callaway County has not adopted planning or zoning.”
  • Minimum dwelling sizeNone

    Residential dwelling size in unincorporated Callaway County.

    • The county has not adopted planning or zoning; incorporated cities and villages may have their own planning, zoning, building-permit, or occupancy requirements.
    • This conclusion addresses county zoning-based minimum dwelling size requirements and does not determine requirements imposed by other authorities.
    “Callaway County has not adopted planning or zoning.”
  • Minimum lot sizeNone

    Zoning-based minimum lot size in unincorporated Callaway County.

    • The county has not adopted planning or zoning; incorporated cities and villages may have their own planning and zoning regulations.
    • Subdivision and stormwater requirements may apply in separately regulated areas; this claim does not negate those requirements.
    “Callaway County has not adopted planning or zoning.”
  • SetbacksNone

    Zoning-based setbacks in unincorporated Callaway County.

    • The county has not adopted planning or zoning; incorporated cities and villages may have their own planning and zoning regulations.
    • This claim does not address floodplain, road-right-of-way, septic, stormwater, or other non-zoning controls.
    “Callaway County has not adopted planning or zoning.”
  • Lot coverageNone

    Zoning-based lot-coverage limits in unincorporated Callaway County.

    • The county has not adopted planning or zoning; incorporated cities and villages may have their own planning and zoning regulations.
    • Stormwater regulations can still apply to qualifying development in the MS4 area.
    “Callaway County has not adopted planning or zoning.”
  • Building heightNone

    Zoning-based building-height limits in unincorporated Callaway County.

    • The county has not adopted planning or zoning; incorporated cities and villages may have their own planning and zoning regulations.
    • This claim does not address non-zoning restrictions or engineering requirements.
    “Callaway County has not adopted planning or zoning.”
  • Mandatory utility hookupConditional

    Utility lines such as water, telephone, or electrical lines that cross a Callaway County road.

    • The requirement is specifically for crossing a county road with utility lines; the source does not establish a general mandatory connection to public water or sewer service.
    • Incorporated municipalities may have separate utility requirements.
    “Callaway County requires a Utility Right-of-Way permit by those who plan to cross a county road with lines (water, phone, electrical, etc.), please contact Howard David Thomas, Callaway County Road and Bridge Engineer for this permit.”
  • Agricultural exemptionAvailable (with conditions)

    Projects exclusively for agricultural and silvicultural uses within Callaway County’s MS4 stormwater management jurisdictional area.

    • The exemption applies to projects exclusively for agricultural and silvicultural uses.
    • Agricultural or silvicultural roads used to access other lands subject to the regulations are not exempt.
    • Agricultural structures used for other uses subject to the regulations are not exempt.
    • The exemption is from the Callaway County MS4 stormwater regulations only and is not a general exemption from other county, state, or federal requirements.
    • The regulations were adopted 2024-10-15.
    “Projects that are exclusively for agricultural and silvicultural uses. Agricultural or silvicultural roads that are used to access other lands subject to these regulations are not exempt. Agricultural structures that are used for other uses subject to these regulations are not exempt.”
  • Subdividing landLimited

    Subdivision applications and related land development within Callaway County’s MS4 stormwater management jurisdictional area.

    • The MS4 area includes unincorporated areas within the Jefferson City Urban Area and any additional buffer areas adopted by the County Commission.
    • Requirements apply to new development or redevelopment disturbing 1 acre or more, smaller activities that are part of a larger common plan of development, or development involving construction, reconstruction, or alteration of a stormwater drainage facility.
    • The regulations were adopted 2024-10-15.
    • This claim does not establish a countywide subdivision-plat approval requirement outside the MS4 area.

    land disturbance threshold: >= 1 acre (Smaller activities are covered when part of a larger common plan of development.)

    “These regulations shall be applicable to all land development, including, but not limited to, site plan applications, subdivision applications, and grading applications, that are located within the stormwater management jurisdictional area, also referred to as the MS4 area.”
  • Driveway accessRequired

    A new temporary or permanent driveway entrance requiring access to a county-maintained road right-of-way.

    • The right-of-way access permit must be obtained before constructing the driveway entrance.
    • Driveway location must be approved by the Road and Bridge Department before construction.
    • Culvert locations and pipe sizes require Road and Bridge Department approval before installation.
    • A 12-inch corrugated metal pipe may be authorized only when the Road and Bridge Department determines it appropriate.
    • A pipe longer than 50 feet requires prior Road and Bridge Department approval.
    • If minimum entrance stopping sight distance is not met, the permit will not be approved; an appeal may be made to the County Commission.
    • The property owner bears the cost of a new culvert installation.

    minimum culvert pipe diameter: >= 15 inches (A 12 inch CMP will be authorized only in situations where it is determined to be appropriate by the Road and Bridge Department.) · minimum culvert pipe length: >= 24 feet · pipe length requiring prior approval: > 50 feet (No pipe longer than 50 feet shall be installed without prior approval by the Road and Bridge Department.)

    “An application for a Right of Way Access Permit (driveway) must be obtained from the Road and Bridge Department, prior to constructing any driveway entrance (temporary or permanent). Driveway location must be approved by the Road and Bridge Department prior to construction.”
  • Permit processNot published

    Occupancy and building-permit process for construction in unincorporated Callaway County.

    • Incorporated areas of Callaway County may have their own planning, zoning, building-permit, and/or occupancy-permit requirements.
    • This claim does not address county permits separately required for floodplain development, driveway access, utility right-of-way crossings, sewage, or other specifically regulated activities.
    “No occupancy permits or building permits are required in unincorporated areas of Callaway County.”

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 permitRequired

    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 OWTS.
    • Some single-family residential lots may be exempt.
    • For residential property less than three acres, a permit is required; the exemption does not apply in some counties, so the county authority must be checked.
    • Work should not begin until a permit is issued or an exemption is confirmed.
    • Effective August 28, 2026, application fees for onsite sewage disposal system construction, modifications, and repairs are temporarily suspended.

    residential lot threshold: < 3 acres (The exemption does not apply in some counties.) · temporary permit-fee suspension effective date: 2026-08-28 (Applies to application fees associated with onsite sewage disposal system construction, modifications, and repairs.)

    “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.”
  • Well permitLimited

    Water wells serving property in Callaway County under Missouri statewide well-construction rules.

    • A non-restricted water-well installation permit is required to construct or repair a water well.
    • A non-restricted pump-installation permit is required to install or replace a pump and for specified plumbing or electrical work from the well to the structure.
    • A restricted permit is required for someone who contracts these activities or directs the installation.
    • Landowners may install their own well or pump without a permit under the cited law and rules.
    • Public water wells may require construction authorization before drilling.
    “A non-restricted water well installation permit is required to construct or repair a water well in Missouri. A non-restricted pump installation permit is required to install or replace a pump in a water well. A non-restricted pump installation permit is also needed to install or repair the plumbing and electrical lines from the well to the point of entry in the structure. A restricted water well or pump installation permit is required for someone to contract these activities or to direct the installation. Landowners may install their own well or pump without a permit pursuant to the above mentioned law and rules.”
  • 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.”
  • 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.

  • Inspections — Building inspections for construction in unincorporated areas of Callaway County.
  • Camping on your land — Temporary camping on private land in unincorporated Callaway County.
  • Tiny homes — Occupancy of tiny homes on private land in unincorporated Callaway County.
  • Accessory dwellings — Accessory-dwelling occupancy and placement on private land in unincorporated Callaway County.
  • Short-term rentals — Short-term rental use in Callaway County.

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 Callaway County, Missouri

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

Callaway County scores 65/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost. Watch-outs: about 136,996 people within a 30-minute drive.

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

Callaway 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 Callaway County Health Department (onsite wastewater under MO DHSS, 19 CSR 20-3). 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 Callaway County, Missouri?

Land in Callaway County runs about $4,653 per acre, based on the latest county data.

What is the water situation in Callaway County?

Callaway County gets about 42.4" of rain a year, with severe drought in roughly 7% of years.

How remote is Callaway County?

A representative private-land location has about 136,996 people within a 30-minute drive and 2,825,857 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 Callaway County means bringing your own water and power. The kit we’d start with:

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How Callaway compares in Missouri

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