Bolthole Index

Linn County, Missouri

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

76Index Score / 100
#23 of 115 in Missouri

Unincorporated Linn County, Missouri does not require a residential building permit1. Marceline requires city building permits, and both Marceline and Brookfield set city zoning; zoning in unincorporated Linn County remains unconfirmed2345. Missouri DHSS handles residential septic construction permits in Linn County, including city parcels, while specified wastewater systems fall under Missouri DNR67.

At a glance

Building permit
No residential county building permit in unincorporated Linn County; Marceline requires city building permits12
County zoning
Unincorporated zoning unconfirmed; Brookfield and Marceline set city zoning543
Septic permits
Missouri DHSS handles residential septic permits; DNR regulates other specified wastewater systems7
RV or tiny-home living
County rules could not be confirmed; ask the County Clerk before relying on long-term occupancy58
Owner-builder
No county owner-builder rule could be confirmed9
Water wells
Well and pump contractors need state permits; landowners installing their own well or pump are exempt but must follow state rules10
Septic soil difficulty
Only 0.1% of soils lack severe limits for a conventional drain field11

Who to call

Septic permits

Missouri Department of Health and Senior Services (DHSS), Onsite Wastewater Treatment Program

OWTS construction permits for Linn County; DHSS is listed as both the agency and authority type

573-751-6095

OnsiteProgram@health.mo.gov

PO Box 570 Jefferson City, MO 65102-0570

Online permits →

Roads & driveways

Linn County Road and Bridge

County road and bridge construction and coordination with townships on normal county-road maintenance

108 North High St. Linneus, MO 64653

Also useful

Linn County Clerk

County governing-body records, resolutions and ordinances; starting point for county rules without a listed department

108 North High St. Linneus, MO 64653

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

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

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

No residential building permit is required for an ordinary home in unincorporated Linn County, Missouri1. Building inspections, code adoption and certificates of occupancy remain unconfirmed; ask the County Clerk about current county ordinances8. Inside Marceline, new buildings, additions and structural alterations require a city building permit before work begins212. Marceline and Brookfield set city zoning, while residential septic permitting stays with Missouri DHSS346. Missouri exempts farm buildings and structures from regulations and permits imposed under county fire-protection or fire-prevention ordinances; the exemption does not waive zoning, septic or floodplain requirements13.

Who handles building-permit questions and road access in Linn County?

The Linn County Clerk maintains governing-body records, resolutions and ordinances; ask that office about county building requirements that remain unconfirmed8. Linn County Road and Bridge handles county road and bridge construction and coordinates with townships on normal county-road maintenance14. County driveway or culvert permit rules could not be confirmed, so ask Road and Bridge before changing access along a county or township road14. For a driveway within Missouri Department of Transportation right of way, MoDOT requires a permit to build a new driveway or modify an existing one15. Linn County is in MoDOT's Northwest District, and applications for right-of-way work can be submitted online, through the covering Traffic Specialist or by mail16.

Does Linn County, Missouri have zoning?

We could not confirm zoning in unincorporated Linn County; ask the County Clerk before relying on the absence of zoning58. Inside Brookfield and Marceline, each parcel has a city zone governing allowable uses, minimum lot size, maximum building height and front-yard depth; residential septic permits remain with Missouri DHSS43176. Marceline’s zoning map is available for public inspection at City Hall, with the ordinance and map also on file at the Linn County Recorder18. Minimum dwelling size, lot size, setbacks, lot coverage and building height remain unconfirmed for unincorporated land; ask the County Clerk before designing the home8.

How do septic permits work in Linn County?

Missouri DHSS handles Linn County residential septic construction permits, including single-family lagoons; DNR regulates non-single-family lagoons, surface-water discharges, industrial wastewater and soil-treatment systems above 3,000 gallons per day7. A septic construction permit is required to install or repair a system on residential property smaller than 3 acres and for nonresidential systems regardless of property size; ask DHSS to confirm any residential exemption before work begins19. Request an application number using the DHSS request form, then wait for the permit or confirmed exemption before starting work20. Application fees for construction, modification and repair are temporarily suspended effective August 28, 202621. Only 0.1% of Linn County soils lack severe limitations for conventional drain fields, making septic feasibility an early purchase question11.

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

We could not confirm rules allowing or prohibiting long-term RV occupancy, temporary camping, tiny homes, manufactured homes or accessory dwellings on unincorporated Linn County land; ask the County Clerk to check current ordinances for the parcel58. Inside Brookfield and Marceline, permitted uses depend on the parcel's city zoning district; residential septic permitting remains with Missouri DHSS437. Off-grid sanitation can use an onsite wastewater system where central sewer is unavailable, subject to a permit or confirmed exemption; wastewater cannot be discharged onto the ground or into a road ditch, or threaten public health or the environment2223.

What are the steps to build a home in Linn County?

  1. Establish whether the parcel is unincorporated; inside Brookfield and Marceline, city zoning applies, and Marceline requires city building permits, while residential septic permits remain with Missouri DHSS4326.
  1. Ask the County Clerk about current county ordinances affecting inspections, occupancy, RV use and setbacks8.
  1. Check the flood map: floodplain development requires a permit, and regulatory-floodway work requires an engineering No-Rise Certificate24.
  1. Request a DHSS septic application number and wait for a construction permit or confirmed exemption20.
  1. Use state-permitted well and pump professionals, or follow state rules when installing your own exempt well or pump10.
  1. Ask Road and Bridge about county or township road access; obtain a MoDOT driveway permit for construction or modification within state right of way1415.

What should you check before buying land in Linn County?

Check septic feasibility before buying: only 0.1% of Linn County soils lack severe limits for conventional drain fields11. Missouri does not require a septic inspection for every sale, but a buyer- or lender-requested inspection must use a licensed individual; ask DHSS whether an additional local requirement applies25. DNR must approve subdivisions, mobile home parks and campgrounds planning to use onsite wastewater; buyers in unapproved developments should ask DNR about residential housing requirements26. Well-construction and repair professionals need state permits, and pump permitting extends to plumbing and electrical lines from the well to the structure's entry point; landowners installing their own well or pump remain subject to other state rules1027. Standard agricultural runoff has a limited state water-pollution permitting exemption, but harmful discharges to state waters and concentrated animal feeding operation rules remain relevant28. Linn County's typical home value is about $153,510, its effective property-tax rate about 0.8%, and its median annual property-tax bill about $899293031.

Watch-outs

  • Linn County's building-inspection, certificate-of-occupancy and owner-builder rules could not be confirmed; ask the County Clerk before starting work98.
  • Long-term RV, camping, tiny-home and manufactured-home rules remain unconfirmed for unincorporated Linn County; ask the County Clerk before moving a unit onto the land58.
  • A residential tract of 3 acres or more is not automatically exempt from septic permitting; obtain confirmation from Missouri DHSS before installation or repair1920.

Sources

  1. Missouri Data Portal - County Building Codes for Missouri (2026 county census)
  2. Marceline: Chapter 500 Building Regulations - City of Marceline, MO (Linn County), quoted and re-checked
  3. Marceline: Planning & Zoning (Linn County), quoted and re-checked
  4. Brookfield: Zoning/Building Permit/Code (Linn County), quoted and re-checked
  5. Missouri Association of Counties - Linn County (2026 county census)
  6. OWTS Construction Permit Process, quoted and re-checked
  7. OWTS Construction Permit Process, quoted and re-checked
  8. Linn County Clerk (linncomo.com)
  9. (2026 county census)
  10. Water Wells - PUB2945, quoted and re-checked
  11. 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
  12. Building & Demolition Permitting - City of Marceline, quoted and re-checked
  13. RSMo Section 64.003 — Farm buildings and farm structures, limitation on certain fire protection or fire prevention ordinances, quoted and re-checked
  14. Linn County Road and Bridge (linncomo.com)
  15. Permits, quoted and re-checked
  16. Permit Process, quoted and re-checked
  17. Planning & Zoning, quoted and re-checked
  18. Planning & Zoning - City of Marceline, quoted and re-checked
  19. health.mo.gov, quoted and re-checked
  20. OWTS Construction Permit Process, quoted and re-checked
  21. OWTS Construction Permit Process — Temporary Permit Fee Suspension, quoted and re-checked
  22. Onsite Wastewater Treatment, quoted and re-checked
  23. health.mo.gov, quoted and re-checked
  24. Floodplain Forms, quoted and re-checked
  25. health.mo.gov, quoted and re-checked
  26. OWTS Construction Permit Process, quoted and re-checked
  27. Well Installation Frequently Asked Questions (FAQ) - PUB2193, quoted and re-checked
  28. RSMo Section 644.059 — Agricultural nonpoint sources and agricultural storm water discharge exempt from permitting requirements, quoted and re-checked
  29. Typical home value (Zillow): Bolthole Index county data
  30. Effective property tax rate: Bolthole Index county data
  31. Median property tax bill: Bolthole Index county data

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like 4 of its 6 neighbors, Linn County requires no county building permit for a home.

RuleLinn CountySullivan CountyChariton CountyLivingston CountyMacon CountyGrundy CountyCarroll County
Building permitNot requiredNot requiredNot requiredRequiredNot requiredNot requiredLimited
County zoningNoNot publishedNot publishedYesNoNot publishedYes
Septic permitsDHSSMO Dept. of Health & Senior ServicesDHSSDHSSDHSSMO DHSS Onsite Wastewater Treatment ProgramCounty Health Dept.

County locator

Linn County in Missouri

76
County map
Linn County highlighted among the Missouri counties · colored by Index score

How Linn County scores

Seclusion69100% ev.
Self-Sufficiency59100% ev.
Admin Boringness8390% ev.
Durability54100% ev.
Property Autonomy47100% ev.
Carry Cost82100% 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 →

$154kTypical home
0.8%Property tax
$4,261Land / acre
40.1"Annual rain
7% of yrsSevere drought
11.6 / yr (+9.7)Mid-century 100°F days
15.9 daysMid-century dry spell
2.09" (+11.3%)Mid-century 1-day rain
1.84×Wildfire change factor
100%Forward climate coverage
$1,763Home insurance / yr
3.4% / yrInsurance growth
1.01%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
12,271People within 30 min
1,500,714People within 2 hr
13,168Radius comparison (15 mi)
19.2People / sq mi
1.3%Federal land
93%Land at 15% slope or less
0.1%Soils rated "not limited" for septic (strict USDA rating)
452 acWorkable land screen
20%Wooded land
50.1 tonsBiomass / forest ac
53°FAvg temp

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Cities and towns in Linn 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: Baker Township · Benton Township · Brookfield Township · Bucklin · Bucklin Township · Clay Township · Enterprise Township · Grantsville Township · Jackson Township · Jefferson Township · Laclede · Linneus · Locust Creek Township · Marceline Township · Meadville · North Salem Township · Parson Creek Township · Purdin · Yellow Creek Township

Answers from the rulebook for Linn County

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

Linn County rules

  • Building permitNot required

    Missouri's official county building-codes dataset lists Linn County with no residential or energy building code; as a non-charter rural county it does not require residential building permits. Corroborated by the state County Building Codes dataset (data.mo.gov iq7s-izvt, 2021): no county residential building code adopted.

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

  • County-wide zoningAbsent

    Inferred: no county planning/zoning department is listed for Linn County and Missouri non-charter rural counties are not zoned unless adopted by referendum.

    Missouri Association of Counties - Linn County ↗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 in Linn County under the Missouri Department of Health and Senior Services (DHSS) authority.

    • A construction permit is required before installing or repairing most onsite wastewater treatment systems; 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 associated with on-site sewage disposal system construction, modifications, and repairs are temporarily suspended due to changes to RSMo 701.046.
    • 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 that treat and discharge into surface waters, systems treating wastewater flows greater than 3,000 gallons per day and dispersing wastewater through soil treatment or absorption systems, and systems treating industrial non-domestic wastewater flows.
    • DNR must approve subdivisions, mobile home parks, and campgrounds if onsite wastewater treatment systems are planned.
    • Some incorporated cities may not fall under the local permitting authority; for work in an incorporated area, the local permitting authority will defer the permit process back to DHSS.

    DHSS-covered domestic wastewater flow: <= 3000 gallons per day (Systems exceeding this threshold are regulated by DNR when wastewater is dispersed through soil treatment or absorption systems.) · application fee status: temporarily suspended (Effective August 28, 2026, pending new standards under RSMo 701.046.)

    “Agency: DHSS Authority Type: DHSS Address: 930 Wildwood Dr. Jefferson City, MO 65102 County: Linn Phone: (573) 751-6095 ext. 5 Website: N/A”
    3 more reviewed findings on this topic
    • State (with conditions) — Missouri DHSS administration of onsite wastewater construction permitting, specifically identified by DHSS for Linn County.
      “Agency: DHSS Authority Type: DHSS Address: 930 Wildwood Dr. Jefferson City, MO 65102 County: Linn”
    • 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 Linn County, including residential systems and non-residential systems within the state-law categories administered by DHSS.

    • A construction permit is required before installing or repairing most OWTS.
    • Some single-family residential lots may be exempt from permitting.
    • For state rules, a residential property less than three acres generally requires a permit; the exemption does not apply in some counties, so the county authority must be checked.
    • A permit is necessary regardless of property size for other onsite systems serving non-residential structures.
    • Effective August 28, 2026, application fees for onsite sewage disposal system construction, modifications, and repairs are temporarily suspended under the cited DHSS update.
    • Work should not begin until a permit has been issued or an exemption has been confirmed by the appropriate permitting authority.

    residential property threshold: < 3 acres (The exemption does not apply in some counties; check with the county authority.) · temporary application-fee suspension effective date: 2026-08-28 (Applies to application fees for onsite sewage disposal system construction, modifications, and repairs under the DHSS update.)

    “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.”
    4 more reviewed findings on this topic
    • Required — Installation or repair of an onsite wastewater treatment system in Linn County under Missouri's DHSS-administered framework.
      “A construction permit is required to install or repair an onsite system on any residential property less than three acres. (This exemption does not apply in some counties; check with the county authority.) Regardless of the size of the property, a permit is necessary for all other onsite systems that serve non-residential structures.”
    • Required — Installing or repairing most onsite wastewater treatment systems in Missouri, including residential systems subject to state permitting.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
    • Required — Installing or repairing most onsite wastewater treatment systems statewide in Missouri.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
    • Required — Proposed campgrounds, mobile home parks, and subdivisions planning to use onsite wastewater treatment systems anywhere in Missouri.
      “DNR must approve subdivisions, mobile home parks and campgrounds if the use of OWTS is planned.”
  • Septic inspectionLimited

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

    • Local public health agencies generally no longer inspect existing systems for real-estate transfers.
    • A private licensed inspector may perform an inspection or evaluation.
    • A lender, buyer, or other transaction participant may require an assessment.
    • Some local standards may be more stringent than state regulations.
    • Inspections and evaluations are distinct; an inspection includes a hydraulic test, while an evaluation does not.
    “For the most part, local public health agencies no longer inspect existing systems related to real estate transfer. The help of a licensed inspector can be obtained to check the condition of the system.”
    2 more reviewed findings on this topic
    • Limited — Inspection or evaluation of an existing onsite wastewater treatment system before a real-estate transaction involving property in Linn County.
      “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 sanitationAllowed (with conditions)

    Use of an onsite wastewater treatment system as sanitation for property in Linn County, within the Missouri DHSS-administered system categories.

    • Construction or repair requires a permit unless the appropriate permitting authority confirms an exemption.
    • Residential property of less than three acres requires a construction permit under the stated state rule; the stated exemption does not apply in some counties.
    • All other onsite systems serving non-residential structures require a permit regardless of property size.
    • DHSS regulates single-family residential systems including lagoons and qualifying domestic onsite or cluster systems of 3,000 gallons per day or less dispersed through soil treatment/absorption systems.
    • Lagoons serving anything other than a single-family residence, systems discharging to surface waters, qualifying systems above 3,000 gallons per day, and industrial wastewater systems are regulated by DNR.

    DHSS domestic wastewater flow threshold: <= 3000 gallons per day (Onsite or cluster systems that disperse wastewater through soil treatment/absorption systems.)

    “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 example is a septic tank and soil absorption system. Another example is a lagoon serving a single-family residence.”
    3 more reviewed findings on this topic
    • Limited — Off-grid sanitation using an onsite wastewater treatment system on property in Linn County where central sewer service is unavailable.
      “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.”
    • Limited — Off-grid domestic wastewater treatment using onsite wastewater treatment systems where central sewer service is unavailable.
      “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.”
    • 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”
    4 more reviewed findings on this topic
    • Limited — Construction or repair of water wells and associated pump work on property in Linn County, Missouri.
      “A non-restricted water well installation permit is required to construct or repair a water well in Missouri. A non-restricted pump installation permit is required to install or replace a pump in a water well. A non-restricted pump installation permit is also needed to install or repair the plumbing and electrical lines from the well to the point of entry in the structure.”
    • Limited — Construction of private water wells in Linn County under Missouri's Well Drillers' Law.
      “Well drillers and pump installers who charge for their services must have a permit to construct a well. Issuing permits to well drillers and pump installers establishes a minimum standard of competency and enables the department to enforce minimum construction standards. Landowners who drill their own well and/or install their own pump are exempt from permit requirements, but must adhere to all other sections of the rules.”
    • 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.”
    7 more reviewed findings on this topic
    • Available — Farm buildings and farm structures in Linn County, including their erection, maintenance, repair, alteration, or extension, insofar as a county fire protection or fire prevention ordinance is at issue.
      “no fire protection or fire prevention ordinance adopted by any county [...] shall [...] require permits with respect to [...] farm buildings or farm structures.”
    • Available — Erection, maintenance, repair, alteration, or extension of farm buildings or farm structures in Linn County when the otherwise-applicable county requirement is a fire protection or fire prevention ordinance.
      “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) — Agricultural nonpoint sources, agricultural stormwater discharges, and return flows from irrigated agriculture in Linn County
      “Agricultural nonpoint sources and agricultural storm water discharges and return flows from irrigated agriculture shall be exempt from permitting requirements set forth in sections 644.006 to 644.141.”
    • 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 [...]”
    3 more reviewed findings on this topic
    • Regulated (with conditions) — Subdivisions in Linn County and elsewhere in Missouri where onsite wastewater treatment systems are planned.
      “DNR must approve subdivisions, mobile home parks and campgrounds if the use of OWTS is planned. Developers as well as property owners in unapproved developments should contact DNR regarding their residential housing unit requirements.”
    • Regulated (with conditions) — Subdivisions in Linn County, including unincorporated areas, when onsite wastewater treatment systems are planned.
      “DNR must approve subdivisions, mobile home parks and campgrounds if the use of OWTS is planned. Developers as well as property owners in unapproved developments should contact DNR regarding their residential housing unit requirements.”
    • 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 of a driveway or modification of an existing driveway within MoDOT right of way in Linn County

    • A MoDOT permit is required for construction of driveways and modifications to existing driveways within MoDOT right of way.
    • The applicant must submit an initial online request for each planned activity.
    • An engineered set of drawings or plans may be required depending on the scope, type, or complexity of the work.
    • A traffic study may be required for larger developments or commercial activity.
    • A hydraulic analysis may be required if storm water or drainage is impacted.
    • A traffic control plan may be required for proposed work on the right of way.
    • A surety deposit or performance bond may be required; a surety deposit is refundable after the work is completed, inspected, and accepted by MoDOT.
    • This claim does not establish a permit requirement for driveways on county, municipal, or private roads outside MoDOT right of way.
    • Linn County is in MoDOT’s Northwest District.
    “We require you to obtain a permit to work on MoDOT's Right of Way for: Construction of driveways”
    One more reviewed finding on this topic
    • Required — Construction or modification of driveways within MoDOT right-of-way statewide.
      “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 the floodplain in Linn County, including development in the regulatory floodway.
      “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.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Missouri DHSS onsite wastewater treatment system construction, modification, and repair applications applicable to Linn County, where DHSS is identified as the permitting agency.
      “Effective August 28, 2026, due to changes to RSMo 701.046, the application fees associated with on-site sewage disposal system construction, modifications, and repairs will be temporarily suspended. 701.046 was changed to take out the $90 permit fee and authorizes the Department of Health and Senior Services to set reasonable fees—effectively placing current fees on hold until the new standards take effect. [...] Agency: DHSS Authority Type: DHSS Address: 930 Wildwood Dr. Jefferson City, MO 65102 County: Linn”
    • 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)

    Onsite wastewater treatment system installation or repair in Linn County under Missouri DHSS authority.

    • A construction permit is required before installing or repairing most OWTS.
    • Some single-family residential lots may be exempt from permitting; the official FAQ states that residential properties less than three acres generally require a permit and that the exemption does not apply in some counties.
    • The first step is determining the agency with permitting authority.
    • For Linn County, DHSS is listed as the agency and applicants must submit the state request form to obtain an application number.
    • Work should not begin until a permit has been issued or an exemption has been confirmed.
    • DNR approval is required for subdivisions, mobile home parks, and campgrounds if OWTS use is planned.
    • Incorporated cities may not fall under a local permitting authority and may defer the process back to DHSS.

    residential property threshold: < 3 acres (The state FAQ describes the permit requirement generally and notes that the exemption does not apply in some counties.) · domestic wastewater flow limit for DHSS coverage: <= 3000 gallons per day (Other systems are regulated by DNR as described on the page.)

    “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. The first step of the permitting process is to determine the agency that has permitting authority where the work is being done. [...] County: Linn [...] Alert: Submit the information at https://stateofmissouri.wufoo.com/forms/q1l2xmqk0yjvaut/ to request an application number.”
    3 more reviewed findings on this topic
    • Published (with conditions) — Permit applications for work on MoDOT right of way in Linn County, including driveway construction or modification on that right of way
      “As a part of our commitment to provide a personal, fast, courteous, and understandable response to our customers there are three ways to submit a permit application for processing.”
    • 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.”
    • Published (with conditions) — Installation or repair of most onsite wastewater treatment systems 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.”
  • 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 Linn County

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

  • Building permitRequired

    New residential dwellings, commercial buildings, and detached accessory structures within the City of Marceline.

    • No work may begin before issuance of the permit.
    • A Marceline Planning and Zoning hearing may be required if a variance or special use is involved.
    • The page states documentation depends on project size and type and advises contacting City Hall.
    • The page identifies City of Marceline Code of Ordinances Title V, Chapter 500, updated 12/18/18; this revision date is not treated as an effective date.

    building permit fee for construction $4,000 and over: 25.00 plus 5.00 per thousand over 4,000 USD · permit processing time: <= up to 3 business days (for new construction application processing and review)

    “What requires a permit? 1. New buildings [...] No work may begin prior to issuance of a permit”
  • Local zoningPresent (with conditions)

    Land uses and buildings within the City of Marceline, Linn County, Missouri.

    • The Marceline Planning & Zoning Commission consists of nine members appointed by the City Council.
    • The ordinance applies from its effective date to use of all land and buildings and to erection or structural alteration of buildings in the city.
    • The official zoning map is maintained for public inspection at City Hall, and a copy of the ordinance and map is also on file in the office of the Linn County Recorder.
    • The ordinance contains provisions for nonconforming uses, variances, special-use permits, zoning amendments, public hearings, and application fees determined by the City Council.
    “From and after the effective date of this Ordinance, the use of all land and every building and the erection or structural alteration of any building in the City of Marceline shall be in conformity with the provisions of this Ordinance.”
    5 more reviewed findings on this topic
    • Present (with conditions) — Land within the City of Marceline, Linn County, Missouri.
      “Zoning regulates land uses within the City. Each parcel in the City is assigned to a zone which describes the regulations under which that land may be used. The Zoning Code identifies allowable uses and sets standards such as minimum lot size, maximum building height, and minimum front yard depth. The Planning & Zoning Commission consists of 9 members appointed by the Marceline City Council.”
    • Present (with conditions) — Land uses and parcels within the City of Marceline, Linn County, Missouri.
      “Zoning regulates land uses within the City. Each parcel in the City is assigned to a zone which describes the regulations under which that land may be used.”
    • Present (with conditions) — Land uses and zoning matters within the City of Brookfield, Linn County, Missouri.
      “Consideration of permitted use in reference to Tiny Houses within R-2 and R-3 zones. [...] Consideration of an amendment to Section 15-113, Article XV, of the Zoning Code regulating temporary housing.”
    • Present (with conditions) — Land within the City of Brookfield, Linn County, Missouri.
      “Zoning regulates land uses within the City. Each parcel in the City is assigned to a zone which describes the regulations under which that land may be used. The Zoning Code identifies allowable uses and sets standards such as minimum lot size, maximum building height, and minimum front yard depth.”
    • Present (with conditions) — Land uses and parcels within the City of Brookfield, Linn County, Missouri.
      “Zoning regulates land uses within the City. Each parcel in the City is assigned to a zone which describes the regulations under which that land may be used. The Zoning Code identifies allowable uses and sets standards such as minimum lot size, maximum building height, and minimum front yard depth.”

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemptions from county building-permit or building-code requirements in Linn County.
  • Inspections — Building inspections in Linn County, Missouri, including unincorporated areas
  • Certificate of occupancy — Certificates of occupancy for buildings in Linn County, Missouri, including unincorporated areas
  • Minimum dwelling size — Minimum dwelling size in unincorporated Linn County, Missouri.
  • Minimum lot size — Minimum lot size in unincorporated Linn County, Missouri.
10 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • 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 Linn County, Missouri

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

Linn County scores 76/100 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 Linn County, Missouri?

Linn 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. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Linn County, Missouri?

Land in Linn County runs about $4,261 per acre, based on the latest county data.

What is the water situation in Linn County?

Linn County gets about 40.1" of rain a year, with severe drought in roughly 7% of years.

How remote is Linn County?

A representative private-land location has about 12,271 people within a 30-minute drive and 1,500,714 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 Linn compares in Missouri

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