Bolthole Index

DeKalb County, Missouri

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

72Index Score / 100
#53 of 115 in Missouri

Unincorporated DeKalb County, Missouri appears not to require a county residential building permit; confirm your parcel and project with the DeKalb County Courthouse12. Zoning is local: Maysville and Colfax Township each run their own, and Maysville also issues its own building permits345. Septic permits come from Missouri DHSS, except inside Maysville and Cameron, where the city regulates private sewage disposal678.

At a glance

Building permit
Appears not required at the county level in unincorporated areas; Maysville and Cameron require city building permits1239
Zoning
Local only: Maysville and Colfax Township have their own zoning; Washington and Grand River township zoning bodies are also identified1045
Septic authority
Missouri DHSS within its jurisdiction; Maysville and Cameron regulate private sewage disposal inside city limits678
Septic permit
Required for most installations and repairs; some single-family lots may qualify for an exemption6
RV or tiny-home living
Not confirmed countywide; ask the applicable township or municipality before placement or occupancy10
Wells
Public wells need DNR approval; private-well installer rules differ, with a landowner exception1112
Floodplain development
A permit is required for development in a regulated floodplain13
Conventional septic soils
0% of mapped soils avoid severe limitations for a conventional drain field14

Who to call

Building permits

DeKalb County Courthouse

General county contact and starting point for parcel-specific building, township, floodplain and road questions

816-449-5402

109 W Main St, PO Box 248, Maysville, MO 64469

Septic permits

Missouri DHSS Onsite Wastewater Treatment Program

Onsite wastewater construction permits for DeKalb County within DHSS jurisdiction

573-751-6095

OnsiteProgram@health.mo.gov

PO Box 570, Jefferson City, MO 65102-0570

Online permits →

Contact details are copied from each office’s official page and were checked against it on October 13, 2026.

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

DeKalb County appears not to require a county residential building permit in unincorporated areas1. Ask the DeKalb County Courthouse to confirm the rule for the parcel before construction2. The county's rules apply to unincorporated land; inside Maysville, a written application and a city building permit are required before construction, alteration or moving of a building3. Cameron, which lies mainly in Clinton County but reaches into DeKalb County, also requires city building permits inside its limits9. Colfax Township's building-permit rule is unconfirmed, so ask the courthouse2.

Missouri authorizes local code adoption rather than imposing one uniform statewide building code, so a municipality or another authorized local body can change the answer within its jurisdiction15. Missouri's county land-use statute does not reach incorporated areas or the raising of crops, livestock, orchards or forestry, and farm buildings are exempt only outside the mapped flood hazard area16. A Missouri protection for farm buildings applies specifically against county fire-protection or fire-prevention ordinances; it is not a blanket exemption from zoning, floodplain or septic requirements17.

Who handles DeKalb County building permits and zoning questions?

We could not confirm a dedicated DeKalb County building department, permit office, residential inspection process or certificate-of-occupancy process. The practical starting point is the DeKalb County Courthouse at 109 W Main St, PO Box 248, Maysville, MO 64469, or 816-449-54022. Ask the courthouse which jurisdiction covers the parcel and whether a municipality, township, floodplain administrator or road authority must review the work. Inside Maysville the city issues building permits and sets zoning34. For a parcel in Colfax Township, Washington Township or Grand River Township, request the current zoning contact and ordinance before relying on county-level information10.

Does DeKalb County, Missouri have zoning?

Zoning in DeKalb County is set locally, not countywide. The county's townships page identifies Washington Township Zoning, Colfax Township Zoning and Grand River Township Zoning10. Colfax Township has a Zoning Ordinance that applies to the unincorporated areas of the township, with an official zoning map kept by the Township Clerk5. The City of Maysville adopts and administers its own Chapter 405 Zoning Regulations inside city limits4, and conditional uses there need approval from the Maysville Zoning Board18. Washington Township's zoning is listed as a township board responsibility, though its ordinance was not located19. Cameron, a city mainly in Clinton County that reaches into DeKalb County, regulates land use through its own planning and zoning commission20.

We could not confirm minimum dwelling size, lot size, setbacks or subdivision approval for any of these jurisdictions. Identify the parcel's municipality and township, then obtain the current ordinance and zoning map from that jurisdiction before planning a house, accessory dwelling, tiny home or manufactured home10.

How do septic permits work in DeKalb County?

Missouri DHSS is the listed onsite-wastewater permitting authority for DeKalb County for systems within DHSS jurisdiction6. Statewide, either DHSS staff, a local public health agency or an ordinance-adopting county or city may regulate construction and repairs, which is why city limits can differ from the county21. Inside Maysville, the city regulates private sewage disposal permits and inspections, and state or county health officer requirements still apply7. Cameron requires a written permit from its city superintendent for private sewage disposal inside its limits8.

A construction permit is required before installing or repairing most onsite systems, although some single-family residential lots may be exempt; work should wait until DHSS issues a permit or confirms an exemption6. Residential property smaller than 3 acres generally requires a permit, but that acreage exemption does not apply everywhere, so confirm eligibility with DHSS22. The mapped soil data show 0% of DeKalb County soils without severe limitations for a conventional drain field, so a site and soil evaluation early on is worth the money14. State law does not require an inspection of an existing system at a sale, but a lender or buyer may request one, and it must be done by a licensed individual23. Application fees for onsite-system construction, modifications and repairs are temporarily suspended effective August 28, 2026; the permit or confirmed-exemption requirement remains6. Contact the DHSS Onsite Wastewater Treatment Program at 573-751-6095 or OnsiteProgram@health.mo.gov24.

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

We could not confirm a countywide rule allowing or prohibiting residential RV use, temporary camping on private land, tiny-home occupancy, manufactured-home occupancy or accessory dwellings in DeKalb County. Do not treat the absence of a published county rule as permission. The answer depends on whether the parcel lies in a municipality or in a township with zoning, and Colfax Township is confirmed as having a zoning ordinance for its unincorporated area5. Washington and Grand River townships also have zoning bodies identified10. Ask the courthouse to identify the governing jurisdiction, then request written confirmation about placement, occupancy, sanitation and time limits before buying or moving a unit2.

Any dwelling without central sewer needs an onsite wastewater system, and wastewater may not be discharged into a road ditch or onto the ground25. Camping at the City of Maysville's reservoirs is prohibited, but that rule covers city reservoirs, not private land26.

Building a home in DeKalb County: what are the steps?

  1. Confirm whether the parcel is inside a municipality and identify its township, because zoning authority varies across DeKalb County10.
  1. Call the DeKalb County Courthouse and ask for written confirmation of any building, inspection, occupancy, floodplain and county-road requirements tied to the parcel2.
  1. Obtain the applicable township or municipal ordinance before finalizing siting: Colfax Township's Zoning Ordinance and map are kept by the Township Clerk, and Washington and Grand River townships have zoning bodies whose dimensional rules were not confirmed510.
  1. Contact DHSS for a septic application number, site requirements and confirmation of any permit exemption before onsite-wastewater work begins; inside Maysville or Cameron, start with the city instead6248.
  1. If the site is in a regulated floodplain, obtain the required local floodplain-development permit; work in the regulatory floodway also requires an Engineering No-Rise Certificate before that permit can issue13.
  1. Resolve driveway authority before construction; we could not confirm a county-road access standard, while state-highway access is regulated by MoDOT27.

What should you check before buying land in DeKalb County?

DeKalb County’s mapped soils show 0% without severe limitations for conventional septic drain fields, so arrange a site and soil evaluation before committing to a homesite14. Development in a regulated floodplain requires a permit13.

For a private well, Missouri requires permits for regulated well and pump installation work, but allows landowners to install their own well or pump without a permit under applicable law and rules; construction standards still apply12. A public well in DeKalb County requires written approval from Missouri DNR’s Public Drinking Water Branch before construction or alteration, subject to charitable and benevolent organization exemptions; contact DNR’s regional office for a well-site survey and obtain an estimated casing-depth letter before applying11.

DeKalb County’s effective property-tax rate is about 0.8%, and the median annual property-tax bill is about $1,2692829. Ask the courthouse about county-road access and subdivision review, and identify the applicable township before finalizing a purchase210.

Watch-outs

  • DeKalb County appears not to require a county residential building permit, but confirm the parcel and project with the DeKalb County Courthouse before construction12.
  • Maysville and Colfax Township each have their own zoning, and Washington and Grand River township zoning bodies are identified, so do not assume one zoning answer applies throughout rural DeKalb County4510.
  • DeKalb County's mapped soils show 0% without severe limitations for a conventional septic drain field; arrange soil and site evaluation before committing to a homesite14.

Sources

  1. State of Missouri Data Portal - County Building Codes for Missouri (2026 county census)
  2. DeKalb County Courthouse (dekalbcountymo.com)
  3. Maysville: Article X: Enforcement - City of Maysville, MO (DeKalb County), quoted and re-checked
  4. Maysville: Table of Contents - City of Maysville, MO (DeKalb County), quoted and re-checked
  5. Colfax Township: Article I: General Provisions - Township of Colfax, MO (DeKalb County), quoted and re-checked
  6. OWTS Construction Permit Process, quoted and re-checked
  7. Maysville: Chapter 705 Sewer Regulations - City of Maysville, MO (DeKalb County), quoted and re-checked
  8. Cameron: Sec. 12-259. Private sewage disposal system (DeKalb County), quoted and re-checked
  9. Cameron: Sec. 3-17. Building permit—Required; responsibility (DeKalb County), quoted and re-checked
  10. DeKalb County Commission, quoted and re-checked
  11. Who Regulates Water Wells in Missouri? - PUB4001 | Missouri Department of Natural Resources, quoted and re-checked
  12. Water Wells - PUB2945 (Missouri statewide rule), quoted and re-checked
  13. Floodplain Forms, quoted and re-checked
  14. 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
  15. RSMo Section 64.170 (Missouri statewide rule), quoted and re-checked
  16. Missouri Revised Statutes § 64.890, quoted and re-checked
  17. Missouri Revised Statutes Section 64.003, quoted and re-checked
  18. City of Maysville, MO General Provisions, quoted and re-checked
  19. DeKalb County Commission, quoted and re-checked
  20. Cameron: Article VI. Planning and Zoning Commission (DeKalb County), quoted and re-checked
  21. Resources | Missouri Department of Health and Senior Services, quoted and re-checked
  22. Frequently Asked Questions | Missouri Department of Health and Senior Services, quoted and re-checked
  23. Frequently Asked Questions | Missouri Department of Health and Senior Services, quoted and re-checked
  24. Missouri DHSS Onsite Wastewater Treatment Program (health.mo.gov)
  25. Onsite Wastewater Treatment | Missouri Department of Health and Senior Services, quoted and re-checked
  26. cityofmaysvillemo.com, quoted and re-checked
  27. Permits | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked
  28. Effective property tax rate: Bolthole Index county data
  29. Median property tax bill: Bolthole Index county data

Written October 13, 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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Compared with neighboring counties

RuleDeKalb CountyClinton CountyAndrew CountyDaviess CountyGentry CountyBuchanan CountyCaldwell County
Building permitNot requiredRequiredNot requiredNot requiredNot requiredRequiredRequired
County zoningNoYesNoNoNoYesYes
Septic permitsDHSSCounty Health Dept.County Health Dept.County Health Dept.Not publishedCounty Planning & ZoningDHSS

County locator

DeKalb County in Missouri

72
County map
DeKalb County highlighted among the Missouri counties · colored by Index score

How DeKalb County scores

Seclusion64100% ev.
Self-Sufficiency52100% ev.
Admin Boringness8790% ev.
Durability53100% ev.
Property Autonomy47100% ev.
Carry Cost77100% 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 →

$242kTypical home
0.8%Property tax
$4,456Land / acre
39"Annual rain
7.6% of yrsSevere drought
11 / yr (+9.2)Mid-century 100°F days
18.1 daysMid-century dry spell
2.1" (+8.5%)Mid-century 1-day rain
1.74×Wildfire change factor
100%Forward climate coverage
$2,001Home insurance / yr
4.4% / yrInsurance growth
1.3%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
4,984People within 30 min
2,659,507People within 2 hr
23,305Radius comparison (15 mi)
23.5People / sq mi
0%Federal land
98%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
0 acWorkable land screen
16.1%Wooded land
25.1 tonsBiomass / forest ac
52.8°FAvg temp

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Cities and towns in DeKalb 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: Adams Township · Town of Amity · Camden Township · Clarksdale · Dallas Township · Grand River Township · Grant Township · Osborn · Polk Township · Sherman Township · Stewartsville · Town of Union Star · Washington Township · Town of Weatherby

Answers from the rulebook for DeKalb County

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

DeKalb County rules

  • Local zoningVaries (with conditions)

    Aggregate local zoning regulation across DeKalb County townships and municipalities; the county page identifies zoning bodies for some townships but does not establish that the county administers each local ordinance.

    • The official county commission page identifies Washington Township Zoning, Colfax Township Zoning, and Grand River Township Zoning.
    • The reviewed official county pages do not identify all DeKalb County municipalities or townships with zoning regulations.
    • Property-specific requirements may depend on the applicable township or municipality.
    “Washington Township Zoning [...] Colfax Township Zoning Grand River Township Zoning”
  • Building permitNot required

    DeKalb County is a non-charter rural Missouri county with no county building department or countywide building code; Missouri non-charter counties generally lack authority to require residential building permits. Corroborated by the state County Building Codes dataset (data.mo.gov iq7s-izvt, 2021): no county residential building code adopted.

    State of Missouri Data Portal - County Building Codes for Missouri ↗Scouted from the county site, not yet independently re-checked

  • County-wide zoningAbsent

    DeKalb County has no countywide zoning in unincorporated areas and lists no planning/zoning department; zoning exists only within incorporated cities such as Maysville.

    DeKalb County, Missouri - Official County Website ↗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”
    2 more reviewed findings on this topic
  • Zoning districtsPartial

    Missouri statutory authority for counties to create zoning districts in unincorporated territory; this does not establish or publish the actual zoning districts for any particular county.

    • The statute applies to unincorporated territory of counties subject to sections 64.211 to 64.295.
    • Actual district boundaries, regulations, and maps depend on county adoption and are not supplied by this statewide statute.
    • District regulations must be uniform for each class or kind of building or land use within each district, although regulations may differ between districts.
    • The regulations must be made in accordance with a comprehensive plan.
    “the unincorporated territory may be divided into districts of such number, shape and area as may be deemed best suited”
  • Who permits septicState (with conditions)

    Onsite wastewater treatment system permitting and regulation in DeKalb County, Missouri, for systems within DHSS jurisdiction.

    • DHSS is the listed permitting authority for DeKalb County.
    • A construction permit is required before installing or repairing most onsite wastewater treatment systems, but some single-family residential lots may be exempt from permitting.
    • Work should not begin until a permit has been issued or an exemption to permitting has been confirmed by the appropriate permitting authority.
    • Effective August 28, 2026, application fees for onsite sewage disposal system construction, modifications, and repairs are temporarily suspended pending new standards.
    • DHSS regulations cover single-family residential systems, including lagoons, 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.
    • The Missouri Department of Natural Resources regulates lagoons serving anything other than single-family residences, systems discharging into surface waters, systems exceeding 3,000 gallons per day that disperse through soil treatment or absorption systems, and industrial non-domestic wastewater systems.
    • DNR must approve subdivisions, mobile home parks, and campgrounds if onsite wastewater treatment is planned.
    • For work in incorporated areas, the local permitting authority may defer the permit process back to DHSS.

    maximum domestic wastewater flow under DHSS jurisdiction: <= 3000 gallons per day (Systems exceeding 3,000 gallons per day are regulated by DNR.) · permit fee suspension effective date: 2026-08-28 (Application fees are temporarily suspended pending new standards.)

    “Agency: DHSS Authority Type: DHSS [...] County: Dekalb”
    3 more reviewed findings on this topic
    • Mixed (with conditions) — Onsite wastewater-treatment-system construction and existing-system repairs in Missouri, including DeKalb County where statewide standards apply.
      “In just under one half of Missouri counties, the local public health agency, or DHSS staff, regulate new system construction and existing system repairs according to state standards. The state standards establish minimum requirements for the size and type of an onsite system based on an evaluation of the site and soil conditions. In the remaining counties and some cities, either the state construction standards, or more stringent local standards, have been adopted by ordinance.”
    • Mixed — Missouri wastewater treatment systems, including domestic onsite systems, larger-flow systems, direct discharges, lagoons, subdivisions, and industrial wastewater.
      “In Missouri, different state and local agencies are responsible for regulating wastewater treatment systems.”
    • Mixed (with conditions) — Onsite wastewater treatment systems statewide in Missouri.
      “DHSS OWTS permitting falls under one of three authority types: DHSS Onsite Program, Local Authority (contract), or Local Authority via Ordinance. The application process varies by permitting authority.”
  • 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.”
    3 more reviewed findings on this topic
    • Required — Installation or repair of onsite wastewater-treatment systems in Missouri, including the statewide rule applicable to DeKalb County.
      “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 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 existing onsite wastewater-treatment system before a real-estate transaction in Missouri, including DeKalb County 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.”
  • 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.”
    2 more reviewed findings on this topic
    • Limited — Onsite sanitation through an onsite wastewater treatment system in Missouri locations without central sewer service, including DeKalb County where statewide standards apply.
      “In Missouri, where central sewer service is not available, homeowners and small business owners use various types of onsite wastewater treatment systems (OWTS). An OWTS is a system that uses natural processes and mechanical components to collect, treat and disperse wastewater from single dwellings or other buildings or structures.”
    • Allowed (with conditions) — Use of onsite wastewater treatment systems as off-grid sanitation where central sewer service is unavailable in Missouri.
      “In Missouri, where central sewer service is not available, homeowners and small business owners use various types of onsite wastewater treatment systems (OWTS).”
  • 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”
    3 more reviewed findings on this topic
    • Required — Construction or alteration of a public water well in Missouri, including a public water well proposed in DeKalb County.
      “Public water systems must receive written approval from the PDWB before constructing or altering a public well, unless 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.”
    • 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.”
  • Agricultural exemptionAvailable (with conditions)

    Farm buildings and farm structures used for agricultural purposes under the county building and land-use restriction provisions of RSMo sections 64.800 to 64.905.

    • The exemption does not apply within incorporated portions of counties.
    • The exemption applies to raising crops, livestock, orchards, or forestry and to specified rice-farming or flood-irrigation impoundments.
    • For farm buildings or farm structures, the area must not be within the area shown on the flood hazard area map.
    • The statute preserves the validity of county ordinances or orders adopted before March 4, 1991.
    • Other laws and local requirements may still apply.

    rice-farming or flood-irrigation berm height: <= 18 inches (small berms placed around a field to hold water for growing rice or flood irrigation)

    “This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes in an area not within the area shown on the flood hazard area map.”
    6 more reviewed findings on this topic
    • Available (with conditions) — Farm buildings and farm structures subject to the county building and land-use restriction provisions addressed by Missouri Revised Statutes § 64.890, including unincorporated areas of DeKalb County.
      “The provisions of this section shall not apply to the incorporated portions of the counties, nor to the raising of crops, livestock, orchards or forestry nor to seasonal or temporary impoundments used for rice farming or flood irrigation. As used in this section, the term "rice farming or flood irrigation" means small berms of no more than eighteen inches high that are placed around a field to hold water for use for growing rice or for flood irrigation. This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes in an area not within the area shown on the flood hazard area map.”
    • Available — Erection, maintenance, repair, alteration, or extension of farm buildings and farm structures in Missouri, including DeKalb County.
      “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.”
    • Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures as against county fire-protection or fire-prevention ordinances.
      “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.”
    • Available (with conditions) — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures used for agricultural purposes under RSMo section 64.890, outside incorporated portions of counties and outside areas shown on flood hazard area maps.
      “This section shall not apply to the erection, maintenance, repair, alteration or extension of farm buildings or farm structures used for such purposes [...]”
    • Available (with conditions) — Farm buildings and farm structures statewide, with respect to county fire-protection and fire-prevention ordinances.
      “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 [...]”
    • Available — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures with respect to county fire-protection or fire-prevention ordinances.
      “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.”
  • Subdividing landLimited

    Subdivision plats in the unincorporated areas of counties covered by RSMo section 64.070 after the county commission adopts subdivision regulations.

    • The county commission must first adopt subdivision regulations.
    • The plat must first be submitted to the planning commission.
    • If the county planning commission does not report upon the plat within thirty days, it may then be deemed approved.
    • If amended or rejected by the planning commission, the action may be overruled and the plat approved only by the county commission, with the reasons for overruling spread upon the county commission minutes.
    • The recorder of deeds may not record the plat until receiving a certificate of authority from the county zoning enforcement officer.
    • The statute also permits a county planning commission, upon written request of an incorporated area's legislative body where there is no municipal planning commission, to pass upon subdivision plats within that incorporated area; those plats are subject to county planning commission rules and approval procedures.

    planning commission reporting period: 30 days (If no report is made, the plat may then be deemed approved.)

    “After the county commission shall have adopted such subdivision regulations, no plat of a subdivision of land within the unincorporated area of such county [...]”
    One more reviewed finding on this topic
    • Limited — Subdivision regulations adopted by Missouri cities, towns, or villages under RSMo section 89.410.
      “The planning commission shall recommend and the council may by ordinance adopt regulations governing the subdivision of land within its jurisdiction.”
  • 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.”
    2 more reviewed findings on this topic
    • Required — Development in floodplain areas, including applicable communities in DeKalb County, Missouri
      “Regardless, some type of permit MUST be issued for ALL development in the floodplain. An Engineering “No-Rise” Certificate is required for all proposed development in the regulatory floodway, and must be obtained by the community before the floodplain development permit may be issued.”
    • Required — All development in a Missouri floodplain, administered through the applicable community floodplain permitting process.
      “Regardless, some type of permit MUST be issued for ALL development in the floodplain.”
  • 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.”
    One more reviewed finding on this topic
    • Published (with conditions) — Missouri onsite wastewater treatment system construction, modification, and repair application fees administered under the statewide DHSS OWTS program.
      “Effective August 28, 2026, [...] the application fees associated with on-site sewage disposal system construction, modifications, and repairs will be temporarily suspended.”
  • Permit processPublished (with conditions)

    Installation or repair of most onsite wastewater treatment systems in Missouri.

    • Some single-family residential lots may be exempt from permitting.
    • The applicant must determine which agency has permitting authority where the work is being done.
    • DHSS permitting may be administered by the DHSS Onsite Program, a local authority under contract, or a local authority via ordinance.
    • Work should not begin until a permit has been issued or an exemption has been confirmed.
    • DHSS regulates single-family residential systems and onsite or cluster systems treating domestic wastewater flows of 3,000 gallons per day or less that disperse 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 systems.
    • DNR must approve subdivisions, mobile home parks, and campgrounds if OWTS use is planned.

    domestic wastewater flow threshold: <= 3000 gallons per day (Systems above this threshold are regulated by DNR when they disperse wastewater through soil treatment or absorption systems.)

    “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.”
    One more reviewed finding on this topic
    • Published (with conditions) — Permit applications for work on Missouri Department of Transportation right-of-way statewide.
      “Contact the Traffic Specialist a minimum of 48 hours prior to beginning work and for all necessary inspections.”
  • 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”

Inside cities and towns in DeKalb County

Municipal rules found while researching the county. They apply inside that city or town, not to unincorporated land.

  • Local zoningPresent (with conditions)

    Zoning in Colfax Township within DeKalb County, Missouri.

    • The official DeKalb County townships page identifies a separate Colfax Township Zoning resource.
    • The cited page does not state the ordinance text, zoning districts, dimensional standards, procedures, or geographic exceptions; those details require review of the linked Colfax Township zoning document.
    “Adams ~ Camden ~ Colfax ~ Dallas ~ Grand River ~ Grant ~ Polk ~ Sherman ~ Washington [...] Colfax Township Zoning”
    3 more reviewed findings on this topic
    • Present (with conditions) — Property within the City of Maysville, Missouri, an incorporated municipality in DeKalb County.
      “This Chapter shall be known and may be cited and referred to as the "Zoning Ordinance of the City of Maysville, Missouri."”
    • Present (with conditions) — Zoning administered by Colfax Township in DeKalb County, including its unincorporated territory.
      “Colfax Township Jared Bestgen 816-632-0018 Trustee-Treasurer 5350 SE Chapel Rd Osborn MO 64474 zoned Bill Saunders 816-675-2305 Member 7981 SW State Route J Osborn MO 64474”
    • Present (with conditions) — Zoning administered by Washington Township in DeKalb County, including its unincorporated territory.
      “Washington Township Nicholas Kerns 816-310-7465 Trustee-Treasurer 12499 SW State Route P Clarksdale MO 64430 zoned Michael Perry 573-819-1724 Member 10250 SW Watson Rd Stewartsville MO 64490”
  • Camping on your landProhibited

    Camping at City of Maysville reservoirs in Maysville, DeKalb County, Missouri.

    • The prohibition is stated for the city's reservoirs.
    • State regulations apply on all species.
    • The page states a $20.00 family fishing-permit fee for the city's reservoirs.

    fishing permit fee: 20 USD per family

    “Permits to fish the city's reservoirs can be purchased at City Hall, $20.00 per family. No camping and State regulations apply on all species.”

Still unanswered

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

  • Owner-builder exemption — Owner-builders seeking exemption from county building permits, inspections, or related requirements.
  • Inspections — Building inspections for residential construction in DeKalb County, including unincorporated areas.
  • Certificate of occupancy — Certificates of occupancy for residential buildings in DeKalb County, including unincorporated areas.
  • Minimum dwelling size — Minimum dwelling size for residential dwellings in unincorporated DeKalb County, Missouri.
  • Minimum lot size — Minimum lot size for unincorporated land in DeKalb County, Missouri.
9 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • 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 DeKalb County, Missouri

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

DeKalb County scores 72/100 on the Bolthole Index, a strong county profile. Its strengths: low administrative friction for a quiet rural property and manageable long-term carry cost.

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

DeKalb 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 Missouri Department of Health and Senior Services (DHSS) Onsite Wastewater Treatment Program. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in DeKalb County, Missouri?

Land in DeKalb County runs about $4,456 per acre, based on the latest county data.

What is the water situation in DeKalb County?

DeKalb County gets about 39" of rain a year, with severe drought in roughly 7.6% of years.

How remote is DeKalb County?

A representative private-land location has about 4,984 people within a 30-minute drive and 2,659,507 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 DeKalb compares in Missouri

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