Bolthole Index

Buchanan County, Missouri

Building permits and land rules in Buchanan County, Missouri

54Index Score / 100
#107 of 115 in Missouri

Unincorporated Buchanan County, Missouri requires a building permit before a structure is erected, moved, altered or demolished, and the rule applies regardless of acreage1. County zoning governs the entire unincorporated area, and a permitted dwelling in the A-1 agricultural district generally needs 20 acres23. Septic construction, major modification and major repair need a separate county permit4. Planning & Zoning handles all of it from the courthouse in St. Joseph5.

At a glance

Building permit
Required before erecting, moving, altering or demolishing a structure1
Zoning
County zoning governs the entire unincorporated area; a permitted A-1 dwelling needs 20 acres, A-OR 2 acres2637
Septic
County permit required for construction, major modification or major repair4
Owner-builder
A conditional family-dwelling route exists in the A-1 agricultural district8
RV living
Park and community rules are published; single-parcel temporary camping remains unconfirmed9
Tiny home
Conditionally permitted in every listed district; building permit and site rules apply10
Floodplain
Development permit required in the county-regulated floodplain areas11

Who to call

Planning & zoning

Buchanan County Planning & Zoning Department

Zoning enforcement, building permits, onsite wastewater (septic) permits, and conditional use permits for unincorporated Buchanan County

816-271-1528

411 Jules Street, Room 201, St. Joseph, MO 64501

Roads & driveways

Buchanan County Road and Bridge - West District

County road and bridge maintenance for Buchanan County's western road district; the county also runs a separate Road and Bridge East district office

816-271-1503

411 Jules Street, Room 101, Saint Joseph, MO 64501

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 Buchanan County, Missouri?

Yes. Unincorporated Buchanan County requires an application before a building is erected, constructed, reconstructed, moved, demolished or altered1. The rule applies throughout the county zoning districts regardless of acreage1. A separate permit is generally required for each structure, and a complete application that meets the Zoning Order must be approved within 30 days of filing12. Published fees vary by permit and structure type; commercial and industrial buildings are charged $0.20 per square foot, while the listed fee for other structures is 1% of estimated construction cost with a $50 minimum13. Starting without a valid permit doubles the later permit fee and can expose the structure to demolition for permit, setback, right-of-way or density-table violations1.

Who issues Buchanan County building permits, and how do you reach them?

Buchanan County Planning & Zoning issues building permits, enforces zoning, handles onsite-wastewater permits and processes conditional-use requests in unincorporated Buchanan County5. The office is at 411 Jules Street, Room 201, St. Joseph, MO 64501, and its phone number is 816-271-15285. Planning & Zoning also assigns new county addresses5. The county rules here cover unincorporated land; the city of Dearborn, which lies mainly in Platte County and reaches into Buchanan, issues its own building permits and sets its own zoning1415. Bring the parcel's tax map-block-parcel number plus its description, dimensions, location and intended use when preparing the application12. County building-inspection authority is limited to enforcement of the Nuisance Order, including permitted work and buildings reasonably suspected of being unsafe, dangerous or hazardous16. Ask Planning & Zoning whether a separate adopted residential or commercial construction code governs the project; we could not confirm one.

Does Buchanan County have zoning?

Buchanan County's Zoning Order governs the entire unincorporated area and regulates uses, buildings, lots, density, yards and other dimensions2. Published classifications include agricultural, business, industrial, residential and miscellaneous districts, with parcel boundaries established by county zoning maps6. For other permitted uses in the A-1, A-2 and A-OR agricultural districts, the table specifies a 50-foot front yard, 15-foot side yards and a 75-foot rear yard; airport, road, solar, floodplain and use-specific rules can add different setbacks17. The A-OR table caps both principal and accessory buildings at 35 feet, subject to separate airport-zone limits and the Zoning Order's exceptions18. Minimum lot area for a dwelling depends on the district. A permitted dwelling in A-1 General Agricultural needs at least 20 acres, a conditional-use dwelling in A-1 needs at least 1 acre, and the March 25, 2026 amendment sets the A-OR permitted-dwelling minimum at 2 acres3197. Single-family dwellings with sewage in the R-1, R-2 and R-3 residential districts need 8,000 square feet20. Business and industrial lots are sized per building: 6,000 square feet in B-1 and B-2, 20,000 square feet in B-321, and 1 acre in I-1 and I-222. Farm structures and structures clearly incidental to farm operations are excluded from the A-1, A-2 and A-OR district-specific regulations, though other Zoning Order provisions may still apply23. Tiny homes are conditionally permitted rather than allowed by right in every listed zoning district10. Do not treat acreage as permit-free: the building-permit rule applies regardless of acreage1.

How do septic permits work in Buchanan County?

Buchanan County requires a permit to construct, substantially modify or substantially repair an onsite sewage system4. The Environmental Inspector administers county permits and inspections under the Missouri statutes and state construction standards adopted by the County Commission24. The written application must include the required site plan, soil-profile-hole locations, test results, lot lines, specifications and design information4. If the disposal standards cannot be met, the Zoning Officer cannot issue a building permit for a structure that needs onsite disposal4. The Environmental Inspector may inspect contractor-built, modified or repaired systems up to 100% of the time25. Existing systems subject to the county rule must be inspected by a licensed onsite inspector or evaluator and documented for approval by the Environmental Inspector or Zoning Director26. About 40.6% of county soils lack severe limitations for a conventional drain field, so parcel-specific soil work remains important27.

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

Buchanan County regulates vacation vehicles used as temporary dwellings in parks and communities: the cited rules require at least 10 feet of separation and cap density at 35 spaces per gross acre9. Those park rules do not answer whether one RV may be occupied temporarily on an individual parcel, so ask Planning & Zoning about the parcel's district and proposed duration before moving in. In unincorporated Buchanan County, a tiny home is a residential structure of less than 1,000 square feet, on wheels or a foundation, and is conditionally permitted in every listed zoning district10. A tiny home still requires a building permit and must meet applicable setbacks, rights-of-way, density and onsite-wastewater requirements; the listed tiny-home application cost is $35010. Manufactured homes are not automatically interchangeable with tiny homes: individual mobile-home placement may go through conditional-use procedures, while parks face additional zoning, platting, utility, separation and density requirements28.

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

  1. Ask Planning & Zoning to locate the parcel on the county zoning maps and identify its district, allowed-use path, setbacks, density and height limits617185.
  2. If using the A-1 family-dwelling route, confirm that the homesite is at least 2 acres and that the owner-builder is a sibling, parent, child or grandchild of the parcel owner8.
  3. File the building-permit application before work begins, including the parcel identifier, site details and intended use12.
  4. Submit the septic application and required soil, site-plan and design materials when onsite disposal is needed4.
  5. Obtain a floodplain development permit before construction or manufactured-home placement in the regulated floodplain areas11.
  6. Obtain a MoDOT permit if the driveway work enters state right-of-way, and contact the Traffic Specialist at least 48 hours before work begins2930.

What should you check before buying land in Buchanan County?

Start with zoning and legal access: have Planning & Zoning locate the parcel on the county zoning maps, then ask the appropriate road authority about the entrance location631. For a proposed split, verify whether county subdivision review applies; only the cited division into 2 parcels each greater than 5 acres receives the stated exemption32. Check mapped flood status because Buchanan County requires a floodplain development permit for construction and manufactured-home placement in the regulated areas11. For an existing septic system, obtain the licensed inspection and county approval documentation required by the local rule26. Ask Planning & Zoning separately about private-well permitting, utility connections, minimum dwelling size and certificates of occupancy because we could not confirm those points. Typical county home value is about $196,537, the median annual property-tax bill is about $1,253, and farmland value is about $5,382 per acre333435.

Watch-outs

  • A Buchanan County permit issued after construction began without approval carries a doubled fee, and violations can lead to demolition1.
  • The A-1 owner-builder route is limited to qualifying family relationships and a homesite of at least 2 acres; it is not a general exemption from permits8.
  • Buchanan County's vacation-vehicle park standards do not confirm permission to camp in a single RV on an individual parcel; ask Planning & Zoning before occupying one95.
  • A tiny home in unincorporated Buchanan County is conditionally permitted, not allowed by right, and remains subject to a building permit, siting rules and applicable onsite-wastewater requirements10.
  • Construction and manufactured-home placement in the county-regulated floodplain areas require a floodplain development permit11.
  • A permitted dwelling in the A-1 agricultural district needs 20 acres, so a small A-1 parcel may need conditional-use or family-dwelling approval instead319.

Sources

  1. Planning & Zoning | Buchanan County, MO, quoted and re-checked
  2. ZONING ORDER, quoted and re-checked
  3. Zoning Order, quoted and re-checked
  4. Zoning Order, quoted and re-checked
  5. Buchanan County Planning & Zoning Department (co.buchanan.mo.us)
  6. CLASSES OF DISTRICTS, quoted and re-checked
  7. Planning & Zoning Amendments to the Zoning Order 3-25-26, quoted and re-checked
  8. co.buchanan.mo.us, quoted and re-checked
  9. co.buchanan.mo.us, quoted and re-checked
  10. ZONING ORDER, quoted and re-checked
  11. co.buchanan.mo.us, quoted and re-checked
  12. Zoning Order, quoted and re-checked
  13. Zoning Order, quoted and re-checked
  14. Dearborn: Article VIII: Permits, Plats and Filing Fees and Culverts - City of Dearborn, MO (Buchanan County), quoted and re-checked
  15. Dearborn: Table of Contents - City of Dearborn, MO (Buchanan County), quoted and re-checked
  16. BUCHANAN COUNTY, MISSOURI Nuisance Order, quoted and re-checked
  17. Planning & Zoning | Buchanan County, MO, quoted and re-checked
  18. Zoning Order, quoted and re-checked
  19. co.buchanan.mo.us, quoted and re-checked
  20. co.buchanan.mo.us, quoted and re-checked
  21. co.buchanan.mo.us, quoted and re-checked
  22. co.buchanan.mo.us, quoted and re-checked
  23. Zoning Order, quoted and re-checked
  24. Zoning Order, quoted and re-checked
  25. co.buchanan.mo.us, quoted and re-checked
  26. Zoning Order, quoted and re-checked
  27. 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
  28. Planning & Zoning | Buchanan County, MO, quoted and re-checked
  29. Permits | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked
  30. Permit Process | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked
  31. Buchanan County Road and Bridge - West District (co.buchanan.mo.us)
  32. co.buchanan.mo.us, quoted and re-checked
  33. Typical home value (Zillow): Bolthole Index county data
  34. Median property tax bill: Bolthole Index county data
  35. Farmland value per acre (USDA census): 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

Like 3 of the 5 neighbors with published rules, Buchanan County requires a building permit for a home.

RuleBuchanan CountyAndrew CountyClinton CountyPlatte CountyDeKalb CountyClay CountyHolt County
Building permitRequiredNot requiredRequiredRequiredNot requiredRequiredNot published
County zoningYesNoYesYesNoYesNot published
Septic permitsCounty Planning & ZoningCounty Health Dept.County Health Dept.County Health Dept.DHSSCounty Public Health CenterCounty Health Dept.

County locator

Buchanan County in Missouri

54
County map
Buchanan County highlighted among the Missouri counties · colored by Index score

How Buchanan County scores

Seclusion26100% ev.
Self-Sufficiency65100% ev.
Admin Boringness4690% ev.
Durability65100% ev.
Property Autonomy47100% ev.
Carry Cost76100% 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 →

$197kTypical home
0.8%Property tax
$5,382Land / acre
37.5"Annual rain
6% of yrsSevere drought
12.8 / yr (+10.6)Mid-century 100°F days
20.1 daysMid-century dry spell
2.19" (+6.7%)Mid-century 1-day rain
1.69×Wildfire change factor
100%Forward climate coverage
$2,188Home insurance / yr
5% / yrInsurance growth
1.8%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
116,681People within 30 min
3,132,684People within 2 hr
98,591Radius comparison (15 mi)
203.2People / sq mi
0.6%Federal land
85.5%Land at 15% slope or less
40.6%Soils rated "not limited" for septic (strict USDA rating)
103,053 acWorkable land screen
28.1%Wooded land
44.1 tonsBiomass / forest ac
53.8°FAvg temp

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Cities and towns in Buchanan 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.

Village of Agency · Town of De Kalb · Easton · Town of Lewis and Clark Village · Village of Rushville · St. Joseph

Answers from the rulebook for Buchanan County

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

Buchanan County rules

  • Building permitRequired

    Structures and applicable on-site wastewater treatment systems in county zoning districts.

    • The county page states the requirement applies in all zoning districts regardless of acreage.
    • A later permit issued for construction started without a valid permit has a doubled fee.
    • Failure to secure a permit or follow setbacks, rights-of-way, and density-table requirements can result in demolition.

    subsequent permit fee: doubled (Where building or construction proceeded without filing for and receiving a valid building permit.)

    “No building shall be erected, constructed, reconstructed, moved or demolished, nor shall it be altered without first making application”
  • Owner-builder exemptionConditional

    A-1 agricultural district family dwellings seeking a building permit without rezoning.

    • The housing site must be at least two acres.
    • The owner/builder requesting the permit must be a sibling, parent, child, or grandchild of the parcel owner.
    • The parent parcel may not be divided more than once or reduced below the applicable Section 108.6 allowance without a Conditional Use Permit.
    • Further division remains subject to rezoning and subdivision regulations.

    minimum housing-site area: >= 2 acres

    “Owner/builder requesting the building permit is a sibling, parent, child or grandchild of the owner of the parcel.”
  • InspectionsLimited

    Buildings, structures, and construction or work within the scope of the Buchanan County Nuisance Order, including work for which a permit is required.

    • The inspection authority is exercised to enforce the Nuisance Order.
    • The Enforcement Officer supervises sewage-disposal and fire-hazard inspectors; other inspections are supervised by the Zoning Officer.
    • Inspections must be conducted in the manner provided by the Nuisance Order.
    • The Order also provides entry procedures when inspection is necessary or there is reasonable cause to believe a building or premises is unsafe, dangerous, or hazardous.
    “All buildings or structures within the scope of this Chapter and all construction or work for which a permit is required shall be subject to inspection”
  • County-wide zoningPresent (with conditions)

    County zoning regulation in the unincorporated area of Buchanan County, Missouri.

    • The Zoning Order expressly governs the entire unincorporated area of Buchanan County.
    • The Order regulates land uses, districts, buildings, lots, density, yards, and other dimensional controls.
    • Permitted, conditional, accessory, and excepted uses remain subject to the district regulations and required approvals.
    “The area governed by these regulations is hereby declared to be the entire unincorporated area of Buchanan County, Missouri.”
  • Zoning districtsPublished (with conditions)

    The Buchanan County Planning and Zoning Department publishes classifications used in the county Table of Uses for the county's zoning districts.

    • The county Zoning Order states that the regulations govern the entire unincorporated area.
    • The published classifications include agricultural, business, industrial, residential, and miscellaneous districts.
    • District-specific boundaries are established through Buchanan County Zoning Maps incorporated into the Zoning Order.
    “The following classifications of Districts are used in the Table of Uses.”
  • Minimum lot sizeDistrict specific (with conditions)

    Conditional-use dwellings in the A-1 General Agricultural District in the unincorporated portion of Buchanan County.

    • The use is conditional and must satisfy additional requirements of the Planning Commission under Sections 705 and 807.
    • A building permit and applicable on-site wastewater approval are required.
    • Family and existing-single-family-dwelling exceptions in Sections 205 and 206 have separate two-acre conditions.

    minimum lot area: >= 1 acre

    “202.2 USES, CONDITIONAL: Those uses listed as conditional in the Table of Uses may be permitted in Agricultural Districts provided they meet at least the necessary criteria established by the requirements listed in the Density Table and any additional requirements of the Planning Commission under Sections 705 and 807. [...] CONDITIONAL USES: A-1 A-2 A-OR Schools 5 Acres 5 Acres 5 Acres Roadside Stands N/A N/A N/A Dwellings 1 Acre N/A N/A All Other 1 Acre 1 Acre 1 Acre”
    5 more reviewed findings on this topic
    • District specific (with conditions) — Permitted dwellings in the A-1 General Agricultural District in the unincorporated portion of Buchanan County.
      “203 AGRICULTURAL DENSITY REQUIREMENTS TABLE MINIMUM LOT AREA PERMITTED USES: A-1 A-2 A-OR Farming Activities N/A N/A N/A Dwellings 20 Acres N/A 1 Acres Other Permitted Uses 1 Acre 1 Acre 1 Acre”
    • District specific (with conditions) — Permitted dwellings in the A-OR Agricultural-Outer Residential District in the unincorporated portion of Buchanan County.
      “The Buchanan County Zoning Order is hereby amended effective immediately upon adoption of this Order as follows: Section 203 is amended so that the Agricultural Density Requirements Table shall read, in relevant part, "Permitted Uses: Dwellings: A-OR: 2 acres."”
    • District specific (with conditions) — Single-family dwellings in the R-1 Single-Family, R-2 Two-Family, and R-3 Multiple-Family Residential Districts in the unincorporated portion of Buchanan County.
      “303 RESIDENTIAL DENSITY REQUIREMENTS TABLE MINIMUM LOT AREA (SQ. FT.) R-1 R-2 R-3 Single Family Dwelling ( with sewage) 8,000 8,000 8,000”
    • District specific (with conditions) — Buildings in the B-1 General Business, B-2 Neighborhood Business, and B-3 Highway Business Districts in the unincorporated portion of Buchanan County.
      “403 BUSINESS DENSITY REQUIREMENTS TABLE MINIMUM LOT AREA (SQ. FT.) B-1 B-2 B-3 Per Building 6,000 6,000 20,000”
    • District specific (with conditions) — Buildings in the I-1 Light Industrial and I-2 Heavy Industrial Districts in the unincorporated portion of Buchanan County.
      “503 INDUSTRIAL DENSITY REQUIREMENTS TABLE MINIMUM LOT AREA I-1 I-2 Per Building 1 Acre 1 Acre”
  • SetbacksSpecified

    Required yards and setbacks in county zoning districts.

    • In the agricultural density table, minimum front, side, and rear yards vary by district and use.
    • The table lists 50-foot front yards, 15-foot side yards, and 75-foot rear yards for other permitted uses in A-1, A-2, and A-OR.
    • Additional airport, road, solar, floodplain, and use-specific setbacks may apply.

    minimum front yard: 50 feet (other permitted uses in A-1, A-2, and A-OR) · minimum side yard: 15 feet (other permitted uses in A-1, A-2, and A-OR) · minimum rear yard: 75 feet (other permitted uses in A-1, A-2, and A-OR)

    “Failure to secure a building permit or follow proper setbacks, right of ways and all Density Table Requirements can result in the demolition of the structure(s).”
  • Building heightSpecified

    Building-height limits in county zoning districts and airport-zoning areas.

    • The A-OR agricultural table lists 35 feet for principal and accessory buildings.
    • Airport approach, horizontal, conical, and transition zones impose separate height limits.
    • Section 700 exceptions apply.

    A-OR principal building maximum height: 35 feet · A-OR accessory building maximum height: 35 feet

    “Principal Building N/A N/A 35’ Accessory Building N/A N/A 35’”
  • Living in an RVLimited

    Vacation-vehicle occupancy in county-regulated vacation vehicle parks and communities.

    • A vacation vehicle park is defined as an area where at least two vacation vehicles are placed or maintained for temporary dwelling purposes.
    • A vacation vehicle community is defined as an area where at least 25 vacation vehicles are placed or maintained for temporary dwelling purposes.
    • Vacation vehicles must be separated from each other and other structures by at least 10 feet.
    • Density may not exceed 35 vacation-vehicle spaces per gross acre.

    minimum separation: >= 10 feet · maximum density: <= 35 vacation vehicles per gross acre

    “The density shall not exceed thirty-five (35) VV spaces per acre of gross site area.”
  • Tiny homesLimited

    Tiny homes used for residential purposes in the unincorporated portion of Buchanan County.

    • The county defines a tiny home as a residential structure less than 1000 square feet, with wheels or on a foundation.
    • The Table of Uses marks Tiny Homes with C in every listed zoning district; the source legend states that C means permitted in the district only subject to conditional requirements.
    • A building permit is required for any structure in all zoning districts, regardless of acreage.
    • Applicable setbacks, rights-of-way, density-table requirements, and on-site wastewater requirements still apply.
    • The Table of Uses lists a $350 cost for Tiny Homes.
    • The Table of Uses identifies the Tiny Homes entry as added February 21st 2024; the definition in the Zoning Order identifies tiny homes as added May 17, 2019.

    maximum floor area: < 1000 square feet · application cost: 350 USD

    “Tiny Homes (Added February 21st 2024) C C C C C C C C C C C C C C C C $350”
  • Manufactured homesLimited

    Manufactured or mobile-home occupancy in county-regulated mobile-home parks and conditional-use contexts.

    • Mobile-home parks and manufactured-home uses are subject to zoning, platting, site, separation, utility, and density requirements.
    • The county page states that conditional-use permits are issued for various uses including mobile homes.

    mobile-home-park density: <= 6 mobile-home lots per acre

    “Mobile homes individually placed under Conditional Use procedures of the Order”
  • Who permits septicMixed (with conditions)

    On-site sewage disposal systems in Buchanan County.

    • The County Commission adopts Missouri statutes and state construction standards for septic systems.
    • The Buchanan County Environmental Inspector administers county permits and inspections.
    • The Zoning Order also states that state health approval is required for sewage disposal systems in applicable developments.
    “The Buchanan County Commission hereby adopts Missouri State Statute 701.025 through 701.059 laws for septic systems”
  • Septic permitRequired

    Construction, major modification, or major repair of an on-site sewage disposal system in Buchanan County.

    • The application must be written and use forms provided by the Buchanan County Environmental Inspector.
    • Plans must include site plans, soil-profile-hole locations, test results, lot lines, specifications, design data, and other required information.
    • If standards cannot be met, the Zoning Officer shall not issue the building permit for a structure requiring disposal on the premises.
    “All persons engaged in the construction, major modification or major repair of an on-site sewage disposal system in Buchanan County shall obtain a permit”
  • Septic inspectionLimited

    On-site sewage disposal systems constructed, modified, or repaired by contractors.

    • The Environmental Inspector may inspect up to 100 percent of such systems.

    maximum inspection coverage: <= 100 percent

    “The Buchanan County Environmental Inspector shall inspect up to one hundred percent of on-site sewage disposal systems constructed, modified or repaired”
    One more reviewed finding on this topic
    • Required — Existing septic systems in Buchanan County where proof of inspection and approval is required.
      “All existing septic systems shall be inspected by a licensed onsite inspector/evaluator”
  • Agricultural exemptionConditional

    Farm structures or structures clearly incidental to farm operations in A-1, A-2, and A-OR agricultural districts.

    • The cited agricultural-district provisions exclude farm structures or structures clearly incidental to farm operations from those district-specific regulations.
    • Other general provisions of the Zoning Order may still apply.
    “except for any structures that are farm structures or clearly incidental to farm operations”
  • Subdividing landRegulated (with conditions)

    Subdivision and re-subdivision involving lots, sale, development, or dedicated, reserved, platted, opened, or constructed streets.

    • Division into two parcels greater than five acres each is exempt from the cited subdivision regulations.
    • Manufactured-home areas with two or more mobile homes must be platted and submitted for review and approval.
    • Additional state wastewater requirements apply to larger subdivisions.

    exempt parcel size: > 5 acres each (division into two parcels greater than five acres each)

    “except the division of land into two (2) parcels greater than five (5) acres each shall be exempt from these regulations.”
  • Building in a floodplainRequired

    Proposed construction or other development, including manufactured-home placement, in areas described in Section 611.1.

    • The requirement applies in the areas described in Section 611.1.
    • Applications must be filed in writing on the county form.
    • The Floodplain Administrator administers and implements the floodplain provisions.
    “A floodplain development permit shall be required for all proposed construction or other development including the placement of manufactured homes”
  • Permit feesPublished (with conditions)

    County Planning and Zoning permit applications.

    • Fees vary by permit type and structure type.
    • Building permit applications by a church, school, charitable institution, or not-for-profit government subdivision are not charged a fee.
    • Fees paid to Planning and Zoning are not refundable.
    • A permit issued after unpermitted construction has a doubled fee.

    commercial and industrial building fee: 0.2 USD per square foot · other structures fee: 1% of total estimated construction cost USD (minimum $50; telecommunication towers $1,000)

    “Commercial and Industrial Buildings Twenty (.20) cents per square foot.”
  • Permit processPublished (with conditions)

    Building permit applications filed with the Buchanan County Planning and Zoning Officer.

    • Applications must identify the taxing map-block-parcel number, general description, size, shape, location, and intended use.
    • The application is approved if all Zoning Order requirements are met, not later than 30 days after filing.
    • If requirements are not met or action is not completed within 30 days, the Zoning Officer must notify the applicant, who may appeal to the Board of Zoning Adjustment.
    • A separate permit is required for each building or structure, except qualifying accessory buildings and appurtenances included with the main building upon payment of an additional fee and simultaneous construction.
    • Permits expire after one year, subject to warranted extensions.

    maximum stated approval period: <= 30 days after filing (if all requirements are met)

    “approved, if all requirements of this Order are met, not later than thirty (30) days after the date of filing.”

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
  • 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.”
    One more reviewed finding on this topic
    • 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”
    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.”
  • 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”
  • 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.

  • Certificate of occupancy — Certificate-of-occupancy requirements for county-regulated construction.
  • Local zoning — Whether incorporated municipalities within Buchanan County have separate zoning ordinances or whether local zoning varies across municipalities and townships.
  • Minimum dwelling size — Minimum dwelling floor area in the unincorporated area governed by the Buchanan County Zoning Order.
  • Camping on your land — Temporary camping on private land in unincorporated Buchanan County.
  • Accessory dwellings — Accessory dwelling units in unincorporated Buchanan County.
2 more unanswered
  • 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 Buchanan County, Missouri

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

Buchanan County scores 54/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost and workable self-sufficiency basics (37.5″/yr rainfall). Watch-outs: about 116,681 people within a 30-minute drive.

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

Buchanan County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Buchanan County Planning & Zoning (onsite wastewater under Missouri DHSS standards). 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.

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

Living in an RV on your own land in Buchanan County is limited to specific cases: Vacation-vehicle occupancy in county-regulated vacation vehicle parks and communities. A vacation vehicle park is defined as an area where at least two vacation vehicles are placed or maintained for temporary dwelling purposes. A vacation vehicle community is defined as an area where at least 25 vacation vehicles are placed or maintained for temporary dwelling purposes. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Buchanan County, Missouri?

Land in Buchanan County runs about $5,382 per acre, based on the latest county data.

What is the water situation in Buchanan County?

Buchanan County gets about 37.5" of rain a year, with severe drought in roughly 6% of years.

How remote is Buchanan County?

A representative private-land location has about 116,681 people within a 30-minute drive and 3,132,684 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 Buchanan compares in Missouri

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