Bolthole Index

Lewis County, Missouri

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

77Index Score / 100
#18 of 115 in Missouri

Unincorporated Lewis County, Missouri does not require a general residential building permit; county zoning remains unconfirmed.12 Canton issues city building permits and sets municipal zoning.34 Missouri DHSS handles Lewis County onsite-wastewater construction permits, while Canton and La Grange also require city approval for private sewage systems; applicable state health requirements still apply inside those cities.567

At a glance

Building permit
No general county residential permit in unincorporated Lewis County1
Private wells
Contractors need state permits; landowners may install their own well or pump without one89
Zoning
County zoning is unconfirmed; Canton sets municipal zoning24
Septic permits
DHSS handles county septic construction permits; Canton and La Grange also require city approval567
RV or tiny-home living
No Lewis County rule was confirmed; ask the County Commission210
Owner-installed septic
Allowed only in some instances; a permit may still be required11
Septic soils
Only 0.4% of soils are rated “not limited” for conventional drain fields; evaluate the site12
State-highway driveway
A MoDOT right-of-way permit is required13

Who to call

Also useful

Lewis County Commission

Starting point for county building, zoning, floodplain and parcel-specific land-use questions when no dedicated office is listed

573-767-5476

Lewis County Courthouse, 100 East Lafayette Street, Monticello, MO 63457

Septic permits

Missouri DHSS Onsite Wastewater Treatment Program

Onsite-wastewater construction permits and application numbers for Lewis County

(573) 751-6095 ext. 5

930 Wildwood Dr, Jefferson City, MO 65102

Online permits →

Roads & driveways

Lewis County Road & Bridge

County-road access questions

573-767-5212

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 Lewis 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 Lewis County, Missouri?

Unincorporated Lewis County does not require a general county residential building permit.1 Missouri adopts fire and building codes locally, and Lewis County does not list a building or code-enforcement department.141 Inside Canton, the city Building Inspector must issue a building permit before erection, additions or structural alterations begin.3 Septic approval remains separate: Missouri DHSS handles Lewis County onsite-wastewater construction permits, and Canton also requires city approval for private sewage systems without displacing applicable state or county health requirements.56 A driveway on MoDOT right-of-way and development in a regulated flood hazard area can require separate approvals.1315

Who is the Lewis County building department, and who do you call?

Lewis County does not list a dedicated building or code-enforcement department, so the practical first call for an unincorporated parcel is the Lewis County Commission.110 The Commission is at the Lewis County Courthouse, 100 East Lafayette Street in Monticello, and its phone number is 573-767-5476.10 Ask the Commission to confirm whether the parcel lies in any locally regulated area and who handles floodplain questions. County-road access questions can go to Lewis County Road & Bridge at 573-767-5212.16 A driveway connecting to MoDOT right-of-way is different: construction or modification requires a state right-of-way permit.13

Does Lewis County, Missouri have zoning?

We could not confirm whether unincorporated Lewis County has county zoning; ask the Lewis County Commission about allowed uses, setbacks, dwelling size and parcel-specific restrictions.210 Missouri law allows qualifying counties to establish zoning after voter approval, but that authority alone does not establish whether Lewis County adopted zoning.17 Inside Canton, municipal zoning applies; confirm the parcel’s district with the city because its website’s zoning information is not the final authority on zone locations.418 Canton’s zoning does not replace septic approvals: the city requires private-sewage approval and preserves additional state or county health requirements.6 Missouri DNR must approve subdivisions, mobile-home parks and campgrounds planning onsite wastewater systems, even when a general county residential building permit is unnecessary.191

How do septic permits work in Lewis County?

Missouri DHSS handles Lewis County onsite-wastewater construction permits; call (573) 751-6095 ext. 5 or use its online form to request an application number.5 Begin with the permitting authority because the application process varies; do not start installation or repairs until a construction permit is issued or an exemption is confirmed.20 Homeowners may install their own septic systems only in some instances, and self-installation may still require a construction permit; ask DHSS before choosing that route.115 State onsite-sewage application fees are temporarily suspended effective August 28, 2026.21 Canton also requires city private-sewage approval, and La Grange requires its Inspector’s written permit before private-system construction where public sewer is unavailable; both preserve additional state or county health requirements.67 Only 0.4% of Lewis County soils are rated “not limited” for conventional drain fields: arrange a site evaluation and consider whether an engineered system is needed, rather than assuming septic is impossible.12

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

We could not confirm a Lewis County rule that answers full-time RV living, temporary camping, or tiny-home occupancy on private land in unincorporated Lewis County.210 Because Lewis County zoning itself remains unconfirmed, a missing online rule is not permission to occupy a parcel without limits.2 Ask the Lewis County Commission about the specific parcel and proposed use before buying, moving an RV onto the land, or ordering a tiny home.10 Wastewater rules still apply to off-grid plans: Missouri prohibits treating a lack of central sewer as permission to discharge sewage onto the ground or into a road ditch, and most onsite systems require a permit unless an exemption applies.2223

How do you build a home in Lewis County, step by step?

  1. Confirm the parcel’s jurisdiction. Ask the Lewis County Commission about unincorporated county zoning and floodplain administration; inside Canton, city zoning and building permits apply.21043
  1. Contact Missouri DHSS for the onsite-wastewater application process and an application number; obtain a construction permit or confirmed exemption before work starts.205 Include city private-sewage approval for Canton or La Grange parcels.67
  1. Arrange a septic site evaluation early because only 0.4% of Lewis County soils are rated “not limited” for conventional drain fields; an engineered system may be needed.12
  1. Use a permitted well contractor or confirm the landowner self-installation exception, which still requires compliance with Missouri well-construction rules.89
  1. Ask Lewis County Road & Bridge about county-road access, or obtain a MoDOT right-of-way permit for a driveway on state right-of-way.1613

What should you check before buying land in Lewis County?

Start with septic feasibility: only 0.4% of Lewis County soils are rated “not limited” for a conventional drain field, so make the purchase contingent on a satisfactory site and soil evaluation when wastewater is not already established.12 Missouri does not require a septic inspection before every sale, but a lender or buyer may request one and then a licensed individual must perform it.24 For a private well, contractors need state permits, while a landowner may install the landowner's own well or pump without a permit but must still follow Missouri well-construction rules.89 Confirm legal and physical access before closing; a driveway in MoDOT right-of-way needs a state permit.13 Lewis County's typical effective property-tax rate is about 0.7%, and the median annual property-tax bill is about $875.2526 Ask the County Commission about county zoning and floodplain administration; inside Canton, verify the municipal zoning designation with the city.2104

Watch-outs

  • Lewis County zoning, setbacks, minimum dwelling size, RV occupancy and tiny-home occupancy remain unconfirmed for unincorporated land; ask the County Commission, and verify Canton parcels under city zoning.2104
  • A general county residential building permit is not required, but septic and state-right-of-way permits are separate approvals.12713
  • Only 0.4% of Lewis County soils are rated “not limited” for conventional drain fields; a site evaluation may identify an engineered solution rather than rule out septic.12

Sources

  1. Missouri Data Portal — County Building Codes dataset (2026 county census)
  2. (2026 county census)
  3. Canton: City of Canton, MO Administration (Lewis County), quoted and re-checked
  4. Canton: Chapter 405: Zoning Code - City of Canton, MO (Lewis County), quoted and re-checked
  5. Missouri DHSS Onsite Wastewater Treatment Program (health.mo.gov)
  6. Canton: Chapter 710: Sewer System Rules and Regulations - City of Canton, MO (Lewis County), quoted and re-checked
  7. La Grange: Article I: Public and Private Sewers (Lewis County), quoted and re-checked
  8. Water Wells - PUB2945, quoted and re-checked
  9. Water Wells - PUB2945, quoted and re-checked
  10. Lewis County Commission (lewiscountymo.gov)
  11. health.mo.gov, quoted and re-checked
  12. 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
  13. Permits | Missouri Department of Transportation (Missouri statewide rule), quoted and re-checked
  14. RSMo Section 64.170 (Missouri statewide rule), quoted and re-checked
  15. Laws and Regulations That Might Affect You if You Mine Sand or Gravel From Missouri Streams (Missouri statewide rule), quoted and re-checked
  16. Lewis County Road & Bridge (lewiscountymo.gov)
  17. RSMo § 64.090 — Planning and zoning powers of county commission (Missouri statewide rule), quoted and re-checked
  18. Government | Canton Missouri, quoted and re-checked
  19. Onsite Wastewater Treatment Resources, quoted and re-checked
  20. OWTS Construction Permit Process, quoted and re-checked
  21. OWTS Construction Permit Process, quoted and re-checked
  22. health.mo.gov (Missouri statewide rule), quoted and re-checked
  23. OWTS Construction Permit Process, quoted and re-checked
  24. health.mo.gov, quoted and re-checked
  25. Effective property tax rate: Bolthole Index county data
  26. Median property tax bill: Bolthole Index county data
  27. OWTS Construction Permit Process, quoted and re-checked

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

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Compared with neighboring counties

Like 3 of the 5 neighbors with published rules, Lewis County requires no county building permit for a home.

RuleLewis CountyClark CountyKnox CountyMarion CountyShelby CountyScotland CountyRalls County
Building permitNot requiredNot requiredNot publishedRequiredNot requiredNot requiredRequired
County zoningNot publishedNoNot publishedYesNoNot publishedYes
Septic permitsMO DHSS Onsite Wastewater Treatment ProgramDHSSMO Dept. of Health & Senior ServicesCounty Health Dept.MO Dept. of Health & Senior ServicesMO DHSS Onsite Wastewater Treatment ProgramCounty Health Dept.

County locator

Lewis County in Missouri

77
County map
Lewis County highlighted among the Missouri counties · colored by Index score

How Lewis County scores

Seclusion74100% ev.
Self-Sufficiency62100% ev.
Admin Boringness7868% ev.
Durability54100% ev.
Property Autonomy47100% ev.
Carry Cost79100% ev.

Evidence strength: 95%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$213kTypical home
0.7%Property tax
$4,861Land / acre
39.5"Annual rain
6.1% of yrsSevere drought
8.6 / yr (+7.3)Mid-century 100°F days
17.2 daysMid-century dry spell
1.99" (+5.4%)Mid-century 1-day rain
1.83×Wildfire change factor
100%Forward climate coverage
$1,762Home insurance / yr
1.9% / yrInsurance growth
1.96%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
6,360People within 30 min
558,801People within 2 hr
10,694Radius comparison (15 mi)
19.4People / sq mi
0.7%Federal land
82.4%Land at 15% slope or less
0.4%Soils rated "not limited" for septic (strict USDA rating)
1,284 acWorkable land screen
25.8%Wooded land
44.8 tonsBiomass / forest ac
52.8°FAvg temp

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Cities and towns in Lewis 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: Ewing · La Belle · Town of Lewistown · Village of Monticello

Answers from the rulebook for Lewis County

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

Lewis County rules

  • Building permitNot required

    Missouri has no statewide residential building code and Lewis is a non-charter rural county with no building/code-enforcement department; the state building-codes dataset lists no adopted residential code for the county. 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 dataset ↗Scouted from the county site, not yet independently re-checked

Missouri rules that apply here

  • Owner-builder exemptionConditional

    Homeowner installation of an onsite wastewater treatment system in Missouri, including potentially Lewis County if no stricter local rule applies.

    • Homeowners may install their own system only in some instances.
    • A construction permit may still be required.
    • The homeowner must check with the local permitting authority.
    • The state page encourages use of a registered installer.
    “In some instances, homeowners may install their own system.”
    One more reviewed finding on this topic
    • Conditional — Homeowner installation of an onsite wastewater treatment system under Missouri rules, including systems potentially located in Lewis County.
      “In some instances, homeowners may install their own system. However, you must check with the local permitting authority. Additionally, a construction permit may be required. We strongly encourage you to work with a registered installer.”
  • 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 septicMixed (with conditions)

    Onsite wastewater treatment systems statewide in Missouri.

    • DHSS administers minimum standards and permits through DHSS, local contract authorities, or local authorities operating under ordinance.
    • County or city governments may adopt standards stricter than the state standard.
    • DNR regulates lagoons serving anything other than single-family residences, systems discharging to surface waters, systems treating flows greater than 3,000 gallons per day and dispersing through soil absorption systems, and industrial wastewater systems.
    • DNR approval is required for subdivisions, mobile home parks, and campgrounds when OWTS use is planned.

    domestic wastewater flow threshold: <= 3000 gallons per day (DNR regulates systems with flows greater than 3,000 gallons per day when wastewater is dispersed through soil treatment or absorption systems)

    “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.”
    One more reviewed finding on this topic
    • 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.”
  • Septic permitRequired

    Installing or repairing most onsite wastewater treatment systems in Missouri, including residential systems subject to state permitting.

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

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

    “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
    4 more reviewed findings on this topic
    • Required — Installing or repairing most onsite wastewater treatment systems in Missouri, including systems in Lewis County unless an applicable exemption or local rule changes the process.
      “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.”
    • Required — Most onsite wastewater treatment installations and repairs in Missouri, subject to the local authority and residential exemptions.
      “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS).”
    • 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 — OWTS inspections or evaluations connected with Missouri real-estate transactions.
      “if a lender or buyer requests an inspection/evaluation, it must be conducted by a licensed individual.”
    • Limited — Inspections of existing onsite sewage systems in connection with property sales statewide in Missouri.
      “Missouri Department of Health and Senior Services' (DHSS) rules governing onsite sewage systems cover minimum construction requirements, system inspections at the time of property sales, and requirements for percolation testers and soil evaluators.”
  • Off-grid sanitationLimited

    Off-grid domestic wastewater treatment using onsite wastewater treatment systems where central sewer service is unavailable.

    • Onsite systems treat and dispose of domestic sewage on the property where generated.
    • A construction permit is generally required, including for residential property less than three acres, subject to county-specific exceptions.
    • Wastewater may not be discharged into a road ditch or onto the ground.
    • Local permitting authorities may impose additional requirements.

    residential lot threshold: < 3 acres (The exemption does not apply in some counties.)

    “Onsite wastewater treatment systems are sometimes referred to as "septic systems." These systems treat and dispose of domestic sewage on the property where it is generated.”
    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 permitRequired

    Construction or repair of a water well in Lewis County when performed by a non-restricted well installation contractor, and contracted or directed well or pump installation activities.

    • A non-restricted permit is required to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a well.
    • A restricted water-well or pump-installation permit is required for someone to contract these activities or direct the installation.
    • A $150 permit fee applies to each water-well and pump permit; the source states this fee is effective April 1, 2024.
    • Permit fees must be renewed annually by October 1.
    • A 40% late fee applies if permits are not paid by October 1, and permits are cancelled if not renewed by October 31.
    • The rule is statewide and applies in Lewis County; the source does not identify a Lewis County-specific override.

    permit fee: 150 USD (per applicable water-well or pump permit; effective April 1, 2024) · permit renewal deadline: October 1 · late renewal fee: 40 percent (if not paid by October 1)

    “A non-restricted permit is required to drill, construct, repair, reconstruct, plug, or install pumps or pumping equipment in a well.”
    4 more reviewed findings on this topic
    • Limited — A landowner personally installing the landowner's own water well or pump in Lewis County.
      “Landowners may install their own well or pump without a permit pursuant to the above mentioned law and 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.”
    • Limited — Construction or alteration of a public well serving a Missouri public water system.
      “Public water systems must receive written approval from the PDWB before constructing or altering a public well”
  • 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.”
    4 more reviewed findings on this topic
    • 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) — Property subdivision or development in Missouri, including Lewis County to the extent state jurisdiction applies.
      “Anyone subdividing or developing property must comply with DNR residential development regulations”
    • Regulated (with conditions) — Subdivision or development involving onsite wastewater systems in Missouri, including Lewis County when state rules apply.
      “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 or modification of driveways within MoDOT right-of-way statewide.

    • A permit is required for construction of driveways and modifications to existing driveways on MoDOT right-of-way.
    • An initial online request must be submitted for each planned listed activity.
    • Engineered plans, traffic studies, hydraulic analysis, traffic-control plans, surety deposits, or performance bonds may be required depending on the work.
    • The rule does not establish a permit requirement for driveways outside MoDOT right-of-way.
    “We require you to obtain a permit to work on MoDOT's Right of Way for: Construction of driveways”
  • Building in a floodplainLimited

    Projects including mining, dredging, building construction, and other dirt-moving activities in designated flood hazard areas within participating Missouri jurisdictions.

    • The source describes local county or city flood damage reduction ordinances rather than one uniform statewide ordinance.
    • The project must be within a participating jurisdiction.
    • The project must be within a designated flood hazard area.
    • The cited rule does not apply if either condition is absent.
    • Covered projects must not raise flood heights.
    “Some jurisdictions (for example, county, city) require any projects in certain floodplains do not raise flood heights.”
    One more reviewed finding on this topic
    • 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 onsite sewage-disposal construction, modification, and repair application fees.
      “application fees [...] will be temporarily suspended.”
    • Published (with conditions) — Missouri onsite wastewater treatment system construction, modification, and repair application fees administered under the statewide DHSS OWTS program.
      “Effective August 28, 2026, [...] the application fees associated with on-site sewage disposal system construction, modifications, and repairs will be temporarily suspended.”
  • Permit processPublished (with conditions)

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

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

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

    “A construction permit is required before installing or repairing most onsite wastewater treatment systems (OWTS). Some single family residential lots may be exempt from permitting.”
    3 more reviewed findings on this topic
    • Published (with conditions) — Missouri OWTS permitting, including the process applicable where the state or a local authority administers the system.
      “Contact the local administrative authority to begin the permit process.”
    • Published (with conditions) — Missouri OWTS permit applications, including systems potentially located in Lewis County.
      “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. Work should not begin until a permit has been issued or an exemption to permitting has been confirmed by the appropriate permitting authority.”
    • Published (with conditions) — Permit applications for work on Missouri Department of Transportation right-of-way statewide.
      “Contact the Traffic Specialist a minimum of 48 hours prior to beginning work and for all necessary inspections.”
  • county zoning authorityLimited

    Missouri county zoning authority over unincorporated land.

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

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

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

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

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

Inside cities and towns in Lewis County

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

  • Local zoningPresent (with conditions)

    Land within the City of Canton, Lewis County, Missouri.

    • The city website states that its zoning references are informational and not the final legal authority for the location of a zone.
    • The complete municipal ordinance text was not separately reviewed for RV, tiny-home, dwelling-size, lot-size, or setback provisions.
    “Municipal Code Link Canton Zoning Map Link — The information provided in this website in regard to zoning districts in the City of Canton, Missouri, is included to provide helpful information on the subject of zoning.”

Still unanswered

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

  • Inspections — Residential building inspections in unincorporated Lewis County.
  • Certificate of occupancy — Certificates of occupancy for residential structures in unincorporated Lewis County.
  • County-wide zoning — Countywide zoning regulation in Lewis County, especially unincorporated areas.
  • Minimum dwelling size — Minimum dwelling size for residential structures in Lewis County.
  • Minimum lot size — Minimum lot size for residential development in Lewis County.
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 Lewis County, Missouri

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

Lewis County scores 77/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and low administrative friction for a quiet rural property.

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

Lewis County does not require a county building permit for a home in unincorporated areas. Onsite septic is permitted by Missouri DHSS Onsite Wastewater Treatment Program. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Lewis County, Missouri?

Land in Lewis County runs about $4,861 per acre, based on the latest county data.

What is the water situation in Lewis County?

Lewis County gets about 39.5" of rain a year, with severe drought in roughly 6.1% of years.

How remote is Lewis County?

A representative private-land location has about 6,360 people within a 30-minute drive and 558,801 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 Lewis compares in Missouri

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