Bolthole Index

Lincoln County, Montana

Building permits, zoning and land rules in Lincoln County, Montana

74Index Score / 100
#7 of 56 in Montana

Unincorporated Lincoln County, Montana does not require a building permit for a qualifying single-family home, though separate trade permits may apply1. Libby and Troy issue city building permits; county zoning outside municipalities is limited to identified airport and Kootenai Business Park districts234. Lincoln County requires local wastewater permits before installation countywide; Environmental Health handles non-public systems, while DEQ has primary responsibility for public systems567.

At a glance

Building permit
Not required for a qualifying single-family home in unincorporated Lincoln County; separate trade permits may apply81
Zoning
County zoning is limited to identified airport and Kootenai Business Park districts; Libby has separate municipal zoning49
Septic permit
Local wastewater permit required countywide before installation; Environmental Health handles non-public systems56
Minimum lot size
About one acre is the sanitation-driven norm for a home with its own well and septic; it is not a universal zoning minimum10
Tiny home
A qualifying factory-built tiny house may be a single-family dwelling on a permanent foundation; placement parks have county standards1112
RV living
Rules for one RV on ordinary private land could not be confirmed; multiple-space permanent RV parks are regulated13
Owner-builder
An owner may work on the owner's property under the contractor-licensing exemption, but other required approvals remain14
Well water right
A DNRC filing or water-use permit applies; the path depends on location, flow and annual volume1516

Who to call

Planning & zoning

Lincoln County Planning Department

Planning contact for subdivision, zoning, floodplain, lakeshore and buildings-for-lease-or-rent questions

(406) 283-2309

lcplanning@libby.org

512 California Ave, Libby, MT 59923

Online permits →

Septic permits

Lincoln County Health Department, Environmental Health

Local onsite wastewater permits and site-evaluation questions

283-2442

Online permits →

Roads & driveways

Lincoln County Road Department

County-road approach questions; separate Libby, Troy and Eureka shops are listed

293-4557

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

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Do you need a building permit in Lincoln County, Montana?

A qualifying single-family home in unincorporated Lincoln County does not need a building permit; the State Building Codes Bureau has jurisdiction outside certified city limits117. Buildings serving transient guests and larger residential projects may fall outside the exemption1. Separate electrical, plumbing, mechanical, septic, floodplain and county-road approach permits can still apply151819. Montana's owner-work contractor-licensing exemption does not waive project approvals and has a restriction on building for prompt resale14. We could not confirm inspections or a certificate of occupancy for an exempt single-family home in unincorporated Lincoln County; ask the Planning Department before relying on either for financing or insurance20.

Who issues building permits in Lincoln County, Montana?

Lincoln County does not administer a county building-code program for unincorporated land17. Inside Libby and Troy, the city issues building permits, with exemptions for some work; Lincoln County Environmental Health still handles non-public septic systems inside city limits236. For county land-use questions, call Planning at (406) 283-2309 or email lcplanning@libby.org20. Planning forms can be completed online and emailed, or printed and delivered in person or by mail with applicable fees21. Contact Environmental Health for septic permits and qualified site evaluations, and the Road Department for new or modified county-road approaches5221923. State-highway driveway permits go through the appropriate Montana Department of Transportation district office24.

Does Lincoln County, Montana have zoning?

Lincoln County's identified unincorporated zoning covers airports and the Kootenai Business Park, rather than all rural land4. Libby administers its own municipal zoning; the published Libby zoning map applies to the city, not unincorporated parcels, and non-public septic systems remain with Lincoln County Environmental Health9256. For most homes using an individual well and septic system, sanitation rules create an approximately one-acre practical minimum; public water and public sewer remove that sanitation-based minimum, but other parcel requirements may apply10. A family-transfer parcel in a zoning district may face a five-acre minimum unless the district allows less; confirm the adopted text with Planning because the available regulation is labeled a draft2620. The proposed Lower Yaak Zoning District was denied in 202427. We could not confirm general county setbacks, minimum dwelling size, lot coverage or building height; ask Planning about the parcel20.

How do septic permits work in Lincoln County, Montana?

Lincoln County requires a local wastewater treatment system permit before any non-public or public system is installed, including inside municipalities5. Environmental Health handles non-public systems; Montana DEQ has primary responsibility for public systems serving more than 24 people for more than 60 days a year or having more than 14 connections67. A Qualified Site Evaluator must evaluate the site, and the system must comply with DEQ Circular 428. A Certificate of Subdivision Approval identifies the approved water source and wastewater method but does not replace the local septic permit295. A county-licensed installer normally must construct or alter the system; a homeowner may work on a gravity system for the homeowner's own residence and property28. Only 4.1% of Lincoln County soils are rated “not limited” for a conventional drain field; that does not make septic impossible, but makes a site evaluation essential before choosing the house location30.

Can you live in an RV or tiny home in Lincoln County, Montana?

We could not confirm whether a single RV may be occupied temporarily or year-round on ordinary private land in Lincoln County; ask Planning before using an RV as a dwelling20. Outside municipal boundaries, multiple-space RV projects and permanent placement parks require county review, water and wastewater compliance, and a state facility license when the project qualifies as a trailer court or campground3113. Park units need at least 25 feet from public-road property lines, 15 feet from other development property lines and 20 feet between units and attached structures, including RV slide-outs32. Manufactured-home and tiny-home placement parks also have county design standards; manufactured homes intended for permanent residency need fire-resistant skirting enclosing the understructure3334. A qualifying factory-built tiny house of 400 square feet or less, excluding lofts, may be used as a single-family dwelling on a permanent foundation, subject to other applicable land-use and sanitation rules11. Ask Planning about placement on the specific parcel; park standards alone do not establish approval for a standalone home3420.

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

  1. Ask the Planning Department whether the parcel is in an airport or business-park zoning district, a flood hazard area or a regulated subdivision20271835.
  1. Check the Certificate of Subdivision Approval, if one applies, for the approved water source and wastewater method29.
  1. Before drilling a well, determine whether DNRC requires a Notice of Intent or a Beneficial Water Use Permit based on location, flow and annual volume153616.
  1. Obtain the qualified site evaluation and county septic permit before setting the house footprint5.
  1. Apply before work for a floodplain permit if the site lies in a Special Flood Hazard Area18.
  1. Obtain a county-road approach permit for a new or modified county-road driveway, or a Montana DOT driveway permit for a state highway1924.
  1. Confirm electrical, plumbing or mechanical permits, then use the single-family building-permit exemption if the project qualifies1.

What should you check before buying land in Lincoln County?

Check recorded agricultural covenants before buying a rural homesite: Lincoln County's agricultural land-division exemption requires exclusive agricultural or open-space use and prohibits residential buildings; changing that use requires governing-body consent to revoke the covenant and subdivision review37. The county's 2026 subdivision regulations also require both county and municipal approval when a proposed subdivision lies partly inside a city or town35. Confirm the well's DNRC filing path before using groundwater; location, flow, annual volume and combined use from the same source affect eligibility for a permit exception1516. Budget for slope and clearing: 14.3% of county land has a slope of 15% or less, and 92% is wooded3839. The published 2024 floodplain fee schedule lists $250–$750 for construction permits and $500–$1,500 for after-the-fact permits, depending on review time and project scale; ask Planning for the current amount before work4020.

Watch-outs

  • A single-family building-permit exemption does not eliminate separate trade, septic, floodplain or access approvals1411819.
  • Lincoln County's placement-park rules do not confirm permission to live in a single RV on ordinary private land; ask Planning before buying land for that use3120.
  • The approximately one-acre lot norm comes from well-and-septic sanitation needs, not a universal county zoning minimum10.

Sources

  1. bsd.dli.mt.gov, quoted and re-checked
  2. Libby: Building Inspector – City Of Libby, MT (Lincoln County), quoted and re-checked
  3. Troy: City of Troy Building Permit Requirements and Application (Lincoln County), quoted and re-checked
  4. Lincoln County Growth Policy, 2019 Update, quoted and re-checked
  5. Septic Permitting, quoted and re-checked
  6. Septic Permitting, quoted and re-checked
  7. Septic Permitting, quoted and re-checked
  8. Montana DLI - Certified City, County and Town Programs (2026 county census)
  9. Libby: Planning and Zoning – City Of Libby, MT (Lincoln County), quoted and re-checked
  10. Lincoln County Growth Policy, 2019 Update, quoted and re-checked
  11. 2024 Building Code Amendments, quoted and re-checked
  12. Lincoln County Buildings for Lease or Rent Regulations, quoted and re-checked
  13. Lincoln County Buildings for Lease or Rent Regulations, quoted and re-checked
  14. MCA — Chapter 45: Construction Contractors, quoted and re-checked
  15. Exceptions To Permit Requirements, quoted and re-checked
  16. Apply for Water Rights, quoted and re-checked
  17. Certified City, County and Town Programs, quoted and re-checked
  18. Building in a Floodplain, quoted and re-checked
  19. Lincoln County Approach Permit Applications & Guidelines, quoted and re-checked
  20. Lincoln County Planning Department (lincolncountymt.us)
  21. Planning Forms, quoted and re-checked
  22. Lincoln County Health Department, Environmental Health (lincolncountymt.us)
  23. Lincoln County Road Department (lincolncountymt.us)
  24. Approach Manual for Landowners and Developers (Montana statewide rule), quoted and re-checked
  25. County Maps, quoted and re-checked
  26. Lincoln County Subdivision Regulations – Draft Planning Board Review, quoted and re-checked
  27. Lincoln County Growth Policy, 2019 Update, quoted and re-checked
  28. Septic Permitting, quoted and re-checked
  29. Engineering Infrastructure & Subdivisions, quoted and re-checked
  30. 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
  31. Lincoln County Buildings for Lease or Rent Regulations, quoted and re-checked
  32. Lincoln County Buildings for Lease or Rent Regulations, quoted and re-checked
  33. Lincoln County Buildings for Lease or Rent Regulations, quoted and re-checked
  34. Lincoln County Buildings for Lease or Rent Regulations, quoted and re-checked
  35. Lincoln County Subdivision Regulations, quoted and re-checked
  36. 85-2-306. Exceptions to permit requirements, MCA, quoted and re-checked
  37. Exempt Plat Review, quoted and re-checked
  38. Share of land at 15% slope or less: Bolthole Index county data
  39. Wooded share of land: Bolthole Index county data
  40. Planning Department Fee Schedule – 2024, quoted and re-checked
  41. Septic Permitting, quoted and re-checked

Written October 11, 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

RuleLincoln CountySanders CountyFlathead CountyLake CountyMineral CountyGlacier CountyMissoula County
Building permitNot requiredLimitedNot requiredLimitedNot requiredNot requiredRequired
County zoningYesNoNoYesNoYesYes
Septic permitsCounty Health Dept.County Env. HealthFlathead City-County Health Dept.County Board of HealthCounty Env. Health & PlanningCounty SanitarianMissoula City-County Health Dept.

County locator

Lincoln County in Montana

74
County map
Lincoln County highlighted among the Montana counties · colored by Index score

How Lincoln County scores

Seclusion86100% ev.
Self-Sufficiency46100% ev.
Admin Boringness72100% ev.
Durability43100% ev.
Property Autonomy83100% ev.
Carry Cost73100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$435kTypical home
0.6%Property tax
$4,690Land / acre
32"Annual rain
11.7% of yrsSevere drought
1.1 / yr (+1.1)Mid-century 100°F days
19.9 daysMid-century dry spell
1.45" (+5.2%)Mid-century 1-day rain
1.44×Wildfire change factor
100%Forward climate coverage
$1,785Home insurance / yr
2.5% / yrInsurance growth
1.15%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
109,496People within 2 hr
3,776Radius comparison (15 mi)
6.1People / sq mi
77%Federal land
14.3%Land at 15% slope or less
4.1%Soils rated "not limited" for septic (strict USDA rating)
86,930 acWorkable land screen
92%Wooded land
46.9 tonsBiomass / forest ac
42°FAvg temp

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Cities and towns in Lincoln 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: Town of Eureka · Town of Rexford

Answers from the rulebook for Lincoln County

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

Lincoln County rules

  • Building code adoptedNot adopted (with conditions)

    Building-code administration in unincorporated Lincoln County outside certified city limits.

    • The Montana Building Codes Bureau has jurisdiction in areas outside the certified local-government building-code jurisdictions.
    • The state source lists Libby and Troy as certified city jurisdictions, each limited to city limits; this claim does not address building-code adoption inside those cities.
    “All other areas are under the jurisdiction of the State Building Codes Bureau”
  • County-wide zoningPresent (with conditions)

    Zoning in unincorporated areas of Lincoln County.

    • The Growth Policy identifies the applicable unincorporated-area zoning as airport zoning and zoning for the Kootenai Business Park in Libby; it does not describe general zoning throughout all unincorporated land.
    • The City of Libby has municipal zoning, which is separately administered from county zoning.
    “The only zoning regulations that exist within unincorporated areas of the County govern the airports and the Kootenai Business Park in Libby.”
  • Local zoningVaries (with conditions)

    Zoning across Lincoln County, aggregating the limited county zoning in unincorporated areas and municipal zoning within Libby.

    • In unincorporated areas, the identified county zoning governs airports and the Kootenai Business Park in Libby.
    • The source identifies the City of Libby as the only community with municipal zoning; municipal zoning is not represented as a county-administered ordinance.
    “The only zoning regulations that exist within unincorporated areas of the County govern the airports and the Kootenai Business Park in Libby. The City of Libby is the only community with municipal zoning.”
  • Zoning districtsPartial

    Unincorporated Lincoln County zoning information published in the County Growth Policy; this is not a complete countywide zoning map or ordinance.

    • The source states that only airport and Kootenai Business Park zoning regulations existed in unincorporated areas at the time of the 2019 Growth Policy update.
    • The source states that the City of Libby is the only community with municipal zoning; incorporated municipalities may therefore have separate rules.
    • The source does not establish that no later district-specific zoning was adopted.
    “The only zoning regulations that exist within unincorporated areas of the County govern the airports and the Kootenai Business Park in Libby.”
    One more reviewed finding on this topic
    • Partial — Unincorporated areas of Lincoln County outside incorporated municipalities; the official county growth policy identifies limited zoning regulation for airports and the Kootenai Business Park in Libby, rather than countywide zoning.
      “The only zoning regulations that exist within unincorporated areas of the County govern the airports and the Kootenai Business Park in Libby. The City of Libby is the only community with municipal zoning.”
  • Minimum lot sizeSpecified

    Most single-family homes on lots in Lincoln County that are not connected to public water and public sewer systems.

    • The source describes this as a de-facto minimum arising from DEQ water and sanitation rules, not as a blanket county zoning minimum.
    • The source says rules typically require about one acre for a lot with an individual well and septic system.
    • If public water and public sewer systems are available, the source states there is no minimum lot size.
    • Other subdivision, health-department, septic, zoning, and parcel-specific requirements may also apply.

    lot size: 1 acre (about one acre; described as a typical/de-facto minimum for lots with an individual well and septic system)

    “The DEQ rules typically require about one acre of land for a lot with an individual well and septic system. This establishes a de-facto minimum lot size of one acre for most single-family homes not connected to public water and sewer systems. If public water and public sewer systems are available there is no minimum lot size.”
    2 more reviewed findings on this topic
    • Specified — Family-transfer parcels created outside platted subdivisions when the property lies within a county zoning district.
      “For the purposes of II-D-2.a.i, if the property is within a zoning district, each family transfer parcel shall be at least five acres in size unless the zoning district allows for smaller parcels sizes.”
    • Specified — Most single-family homes in Lincoln County not connected to public water and sewer systems, where DEQ water and sanitation rules govern development suitability.
      “The DEQ rules typically require about one acre of land for a lot with an individual well and septic system. This establishes a de-facto minimum lot size of one acre for most single-family homes not connected to public water and sewer systems. If public water and public sewer systems are available there is no minimum lot size.”
  • Living in an RVLimited

    Multiple-space recreational vehicle projects and permanent RV placement parks on land within Lincoln County but outside municipal boundaries.

    • The regulations apply to all lands within Lincoln County exclusive of municipal boundaries.
    • Projects providing multiple RV spaces must obtain a facility license from the Montana Department of Public Health and Human Services when also constituting a trailer court, work camp, youth camp, or campground.
    • The first three or fewer non-exempt buildings for lease or rent on a single tract require Environmental Health Department review and approval for adequate water and septic, with the approval certificate and conditions recorded with the County Clerk and Recorder.
    • All other buildings for lease or rent on a single tract require review and approval by the Board of County Commissioners.
    • Required improvements must be installed before renting or leasing any portion of the property.
    • Permanent-residency units must be skirted with fire-resistant material that completely encloses the understructure.
    • Water and wastewater design must comply at minimum with DEQ standards; density and unit size may not exceed DEQ standards.
    • Projects with 30 or more units require two separate full-time egress routes reviewed by the Fire Protection Authority.
    • Applications require the county form and applicable fees, and complete applications are subject to county review and approval, conditional approval, or denial.
    • Applicable zoning, building codes, private covenants, floodplain regulations, lakeshore regulations, subdivision regulations, and other state and local laws still apply.

    setback from property line abutting public road: >= 25 feet · setback from other development property lines: >= 15 feet · separation between units and attached structures: >= 20 feet · separation of detached structures from mobile/manufactured homes and attached structures: >= 5 feet · tandem parking spaces per unit: >= 2 spaces · driveway width: >= 10 feet · guest parking: per 1 space per 10 units (Group parking may be provided.) · pad setback from serving street: >= 10 feet · vegetated buffer along adjoining streets or roadways: >= 10 feet (Up to five feet of unused right-of-way may be included.) · interior property-line buffer: >= 3 feet (Fencing with 75% opacity may be used alternatively.) · separate full-time egress routes: >= 2 routes (Required for developments designed for 30 or more units.) · application completeness determination: <= 10 working days · Board of County Commissioners decision after complete application: <= 60 working days (May be extended by written mutual agreement.) · violation voluntary-compliance period: >= 30 days · maximum fine: <= 500 USD

    “These regulations apply to all lands within Lincoln County, exclusive of lands within municipal boundaries. [...] Design Standards for Mobile/Manufactured/Tiny Home or Permanent RV Placement Parks”
    4 more reviewed findings on this topic
    • Limited — Placement and occupancy of recreational vehicles in a permanent RV placement park or in multiple spaces for lease or rent on unincorporated land in Lincoln County.
      “7. Design Standards for Mobile/Manufactured/Tiny Home or Permanent RV Placement Parks”
    • Limited — Multiple-space permanent RV placement parks and other projects creating multiple spaces for RVs on land outside municipal boundaries in Lincoln County.
      “7. Design Standards for Mobile/Manufactured/Tiny Home or Permanent RV Placement Parks”
    • Limited — Multiple-space recreational vehicle placement parks and projects providing multiple RV spaces on land outside municipal boundaries in Lincoln County.
      “All units must be located at least 25 feet from any property line abutting a public road and at least 15 feet from other property lines of the development.”
    • Limited — Placement of multiple recreational vehicles in a permanent RV placement park or other project providing multiple RV spaces on land outside municipal boundaries in Lincoln County.
      “or Permanent RV Placement Parks A. Layout”
  • Camping on your landLimited

    Camping at J-Neils Memorial County Park in Lincoln County.

    • Camping is by permit only.
    • The park policy states that camping is primitive camping only.
    • No open fires are allowed.
    • The policy identifies camping other than events for travelers with livestock who can provide brand inspections, if applicable, and other required livestock documentation, and who must check with the park attendant for a permit.
    “XI. CAMPING A. By permit only. B. Primitive camping only. C. No open fires.”
  • Tiny homesLimited

    Tiny-home units in multiple-space permanent tiny-home placement parks outside municipal boundaries in Lincoln County.

    • Section 7 is titled Design Standards for Mobile/Manufactured/Tiny Home or Permanent RV Placement Parks.
    • Applicable zoning, sanitation, water, wastewater, solid-waste, access, emergency-service, and floodplain requirements still apply.
    • Projects creating multiple spaces require the applicable county review and approval process; qualifying trailer courts or campgrounds also require a state facility license.

    minimum distance between units and attached structures: >= 20 feet · minimum distance from public-road-abutting property line: >= 25 feet · minimum distance from other development property lines: >= 15 feet

    “All units must be located at least 25 feet from any property line abutting a public road and at least 15 feet from other property lines of the development.”
    One more reviewed finding on this topic
    • Limited — Placement and occupancy of tiny homes in a mobile/manufactured/tiny home or permanent RV placement park outside municipal boundaries in Lincoln County.
      “Design Standards for Mobile/Manufactured/Tiny Home”
  • Manufactured homesLimited

    Manufactured-home units in multiple-space mobile/manufactured-home placement parks outside municipal boundaries in Lincoln County.

    • Section 7 design standards apply to mobile/manufactured-home placement parks.
    • Each unit intended for permanent residency must be skirted with fire-resistant material completely enclosing the understructure.
    • Applicable zoning, sanitation, water, wastewater, solid-waste, access, emergency-service, and floodplain requirements still apply.
    • Qualifying trailer courts or campgrounds require a Montana Department of Public Health and Human Services facility license.

    minimum distance from public-road-abutting property line: >= 25 feet · minimum distance from other development property lines: >= 15 feet · minimum distance between units and attached structures: >= 20 feet

    “Each unit intended for permanent residency must be skirted. The skirting must be fire-resistant material and completely enclose the understructure.”
    2 more reviewed findings on this topic
    • Limited — Placement and occupancy of manufactured homes in a manufactured-home placement park or in multiple spaces for lease or rent on unincorporated land in Lincoln County.
      “7. Design Standards for Mobile/Manufactured/Tiny Home or Permanent RV Placement Parks”
    • Limited — Placement and occupancy of manufactured homes in a mobile/manufactured/tiny home or permanent RV placement park outside municipal boundaries in Lincoln County.
      “Each unit intended for permanent residency must be skirted.”
  • Who permits septicCounty

    Non-public wastewater treatment systems in Lincoln County, including individual, shared, and multi-user systems.

    • Lincoln County Environmental Health Services is responsible for ensuring that non-public systems are permitted and installed under state and local regulations.
    • Proper placement, type, and sizing are based on a Certificate of Subdivision Approval or a site evaluation.
    • A local wastewater treatment system permit is always required before installation.
    “Environmental Health Services is responsible for ensuring that non-public wastewater treatment systems (individual/shared, multi-user) are permitted and installed in accordance with state and local regulations.”
  • Septic permitRequired

    Installation of non-public or public wastewater treatment systems in Lincoln County, Montana.

    • A local wastewater treatment system permit is always required before installation.
    • Site evaluations must be performed by a Qualified Site Evaluator.
    • Wastewater treatment systems must be designed and installed under DEQ Circular 4.
    • A Lincoln County wastewater treatment and disposal system installer license is required to construct or alter a septic system.
    • The installer-license requirement does not apply to a homeowner constructing or altering a gravity system for the homeowner's own residence on the homeowner's own property.
    • Montana DEQ has primary responsibility for public wastewater treatment systems serving more than 24 persons for more than 60 days per year or having more than 14 connections.
    “A local wastewater treatment system permit is ALWAYS required before a system (non-public or public) is installed.”
    2 more reviewed findings on this topic
    • Required — Installation of non-public or public wastewater treatment systems in Lincoln County, Montana.
      “A local wastewater treatment system permit is ALWAYS required before a system (non-public or public) is installed.”
    • Required — Installation of non-public or public wastewater treatment systems in Lincoln County, Montana.
      “A local wastewater treatment system permit is ALWAYS required before a system (non-public or public) is installed.”
  • Off-grid sanitationAllowed (with conditions)

    Non-public onsite wastewater treatment and dispersal systems serving property without municipal sewer in Lincoln County.

    • Individual, shared, and multi-user non-public systems are recognized and regulated by Lincoln County Environmental Health Services.
    • A local wastewater treatment system permit is always required before installation.
    • A qualified site evaluator must perform the site evaluation.
    • The system must comply with state and local requirements, including DEQ Circular 4.
    • Proper placement, type, and sizing depend on a Certificate of Subdivision Approval or site evaluation.
    “on-site wastewater treatment and dispersal”
  • Agricultural exemptionAvailable (with conditions)

    A division of land outside a platted subdivision in unincorporated Lincoln County proposed to create a parcel used exclusively for agricultural purposes or open space.

    • The parcel must be used only for production of livestock or agricultural crops, or preservation of open space.
    • No residential, commercial, or industrial buildings may be built; commercial agricultural-processing facilities are excluded.
    • The parties must enter into a covenant running with the land, revocable only by mutual consent of the governing body and property owner, requiring exclusive agricultural or open-space use.
    • The covenant must be signed by the property owner, buyer or lessee, and governing body.
    • The landowner must demonstrate the agricultural purpose and absence of planned residential, commercial, or industrial buildings.
    • A change to a non-agricultural use subjects the parcel to full subdivision review; prohibited structures may be allowed only after covenant revocation and subdivision review, with governing-body approval to lift the covenant.
    • Lots within platted subdivisions are not eligible.
    • The application requires an Agricultural Exemption Application, survey documents, a review fee of 400, sanitation-exclusion materials, a governing-body-signed acceptance form, a recorded covenant or certification, and any required address or road-name applications.

    review fee: 400

    “The intention of this exemption is to allow a landowner to create a parcel that will be used only for production of livestock or agricultural crops”
  • Subdividing landRegulated (with conditions)

    Subdivision of land within Lincoln County, including unincorporated areas and incorporated areas to the extent the county regulations apply under their jurisdiction provisions.

    • The regulations were amended May 27, 2026 by Resolution 2026-14.
    • If a proposed subdivision lies within one mile of a third-class city or town, two miles of a second-class city, or three miles of a first-class city, the County must submit the preliminary plat to the city or town for review and comment.
    • If a proposed subdivision lies partly within an incorporated city or town, the preliminary plat must be submitted to and approved by both the city or town and the County governing bodies.
    • The regulations supplement other regulations, including zoning, floodplain, building-code, development-code, and fire-code requirements; where requirements conflict, the more restrictive requirements apply.

    third-class city or town review radius: <= 1 mile · second-class city review radius: <= 2 miles · first-class city review radius: <= 3 miles

    “These regulations govern the subdivision of land within the jurisdictional area of the governing body of Lincoln County and governing bodies of incorporated areas.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Subdivision of land in unincorporated Lincoln County, Montana, under the county subdivision regulations and the Montana Subdivision and Platting Act.
      “The Lincoln County Subdivision Regulations are a requirement of Montana Law under 76-3-501 MCA”
  • Driveway accessRequired

    All new or modified approaches constructed to a Lincoln County road, including residential, commercial, and industrial approaches.

    • The owner or contract purchaser is the proper applicant.
    • The application must include a brief illustrated description, legal description, and applicant contact information.
    • The District Road Foreman inspects the proposed location and may approve or deny the request.
    • If not approved, the Road Foreman explains necessary modifications.
    • Final inspection is required.
    • A $50 fee is charged.
    • The permit is good for 6 months upon receipt of the completed application form.
    • A 12-inch minimum drainage pipe is specified where required; drainage, sight-distance, slope, and width requirements also apply.
    • A maximum 40-foot radius is allowed for a single-dwelling access approach; commercial or industrial access width is left to the County road foreman's discretion.

    approach permit fee: 50 USD · permit validity: 6 months (Upon receipt of completed application form) · minimum sight distance: >= 200 feet · single-dwelling access approach radius: <= 40 feet (Commercial or industrial access width is at County road foreman's discretion)

    “All new or modified approaches constructed to a County road by any person shall require an approach permit.”
  • Building in a floodplainRequired

    Construction or development within any Special Flood Hazard Area in Lincoln County, including A Zones and the 100-year floodplain; home and manufactured-home construction in the 100-year floodplain.

    • A floodplain permit is required before construction or development begins within any SFHA, including A, AE, AO, and other A Zones or the 100-year floodplain.
    • A home or manufactured home in the 100-year floodplain requires a permit application with a site plan.
    • Allowed construction must have the lowest floor two feet above the 100-year floodplain elevation.
    • Construction that does not comply with all Lincoln County floodplain standards is prohibited.
    • Structures generally must be elevated above base flood elevation and may require an engineering evaluation and elevation certificate to determine no adverse impact to upstream properties.
    • Additions must comply with all floodplain standards; if addition and remodeling value exceeds 50% of the existing structure value, the existing structure must be elevated two feet above the 100-year floodplain or flood-proofed according to County standards.
    • Unpermitted improvements may result in fines or required removal.

    lowest-floor elevation above 100-year floodplain elevation: >= 2 feet (Applies to allowed construction in floodplain areas) · substantial-improvement threshold: > 50 percent (If addition and remodeling value exceeds 50% of existing home or business value, elevation or flood-proofing is required)

    “A floodplain permit (at a minimum) is required before construction or development begins within any Special Flood Hazard Area (SFHA);”
  • Permit feesPublished

    Lincoln County Planning Department subdivision, buildings-for-lease-or-rent, zoning-district-creation, floodplain, and lakeshore permit or review fees.

    • The cited fee schedule is labeled 2024 and states it is effective April 1, 2024.
    • Subdivision review includes first minor, subsequent minor, major, mobile home park, RV park, and condo development.
    • Floodplain and lakeshore fee amounts are based on estimated review time and project scale.
    • Permit necessity and fee amount for floodplain and lakeshore matters are determined during sufficiency review.

    subdivision review: per 500 USD/lot · final plat review: 750 USD · buildings for lease/rent: $500 + $50/unit USD · zoning district creation: 1800 USD · floodplain construction permit: 250-750 USD (Fee based on estimated review time and scale of project; permit necessity and fee amount determined during sufficiency review) · after-the-fact permit: 500-1500 USD (Floodplain/lakeshore fee schedule)

    “Planning Department Fee Schedule – 2024 Effective April 1, 2024”
    One more reviewed finding on this topic
    • Variable (with conditions) — Floodplain construction permits and after-the-fact permits administered by Lincoln County.
      “Fee based on estimated review time and scale of project.”
  • Permit processPartial

    Lincoln County Planning Department applications, including subdivision, road-approach, lakeshore, and floodplain matters.

    • Forms may be completed online and emailed to the Planning Department, or printed and delivered in person or by mail with applicable fees.
    • Some listed forms may not yet show the recently changed fee amount; applicants are directed to the fee schedule.
    • The cited page does not establish a complete process for every permit type administered in the county.
    “These forms may be completed online and emailed to the Planning Department, or you may print the form and deliver in person or by mail”

Montana rules that apply here

  • Building permitLimited

    Construction, remodeling, moving, alterations, additions, repairs, or changes of occupancy for buildings subject to Montana state building-code jurisdiction.

    • A state building permit is required before construction for certain types of new buildings and for certain alterations, additions, and repairs.
    • The state permit requirement does not apply to projects within the jurisdictional limits of a certified local government program; local requirements may apply there.
    • In the state's jurisdiction, state law exempts farm and ranch buildings; mining buildings on mining property; petroleum refineries and pulp and paper mills except office and shop buildings; residential buildings containing less than five dwelling units except when serving transient guests; and private garages and private storage buildings used for the owner's own use and not as part of a commercial enterprise or business.
    • Building permits must be issued on required projects before plumbing, mechanical, or electrical permits can be issued and before work authorized under those permits can start.
    “In Montana a state building permit is required prior to the start of construction for certain types of new buildings, and/or for alterations, additions, and repairs.”
    One more reviewed finding on this topic
    • Not required — A single-family residence in unincorporated Lincoln County, Montana, outside the jurisdictional limits of a certified local building-code program.
      “for areas outside cities certified to issue their own permits, state law exempts: [...] residential buildings containing less than five dwelling units”
  • Owner-builder exemptionAvailable

    An owner working on the owner's property, or an owner contracting for work performed by a registered construction contractor, under Montana's construction-contractor licensing chapter.

    • The exemption does not apply to an owner otherwise covered by the chapter who constructs a residence on the owner's property intending and for the purpose of promptly selling the improved property.
    • For an owner working on the owner's property, the resale exception does not apply if the owner has continuously occupied the property as the owner's primary residence for at least the last 12 months.
    • This is an exemption from the construction-contractor licensing chapter; it does not itself exempt a project from applicable building, electrical, plumbing, mechanical, or inspection requirements.

    primary-residence occupancy period for resale exception: >= 12 months (The statute states the owner must have continuously occupied the property as the owner's primary residence for at least the last 12 months.)

    “(13) to an owner working on the owner's property, whether occupied by the owner or not, but this exemption does not apply to an owner”
    One more reviewed finding on this topic
    • Available — An owner working on the owner's property, including property in unincorporated Lincoln County, Montana, under Montana's construction-contractor licensing law.
      “(13) to an owner working on the owner's property, whether occupied by the owner or not, but this exemption does not apply to an owner who is otherwise covered by this chapter who constructs an improvement on the owner's property with the intention and for the purpose of promptly selling the improved property, unless the owner has continuously occupied the property as the owner's primary residence for at least the last 12 months;”
  • InspectionsLimited

    Buildings and other projects requiring permits under Montana state building-code jurisdiction; certified local governments may perform inspections within their certified jurisdictional areas.

    • The Montana Building Codes Program performs inspections for projects requiring a permit under state jurisdiction.
    • The permit holder must notify the inspector when work is ready for inspection and provide access for required inspections.
    • Cities, counties, and towns may enforce local building codes and perform inspections only through certified local government programs; remaining areas fall under the state Building Codes Program.
    “The BC Program establishes and enforces statewide codes by issuing permits and performing inspections.”
  • Certificate of occupancyLimited

    Buildings constructed in accordance with the Montana state building code or a county, city, or town building code.

    • The certificate must certify that the building conforms to the applicable building regulations.
    • The statute addresses certificates for buildings constructed under the state or local building code; it does not establish a universal certificate requirement for every structure or every occupancy.
    “A certificate of occupancy for a building constructed in accordance with the provisions of the state building code or county, city, or town building code must certify that the building conforms to the requirements of the building regulations applicable to it.”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in jurisdictional areas where a Montana county has established zoning regulations under MCA Title 76, chapter 2, part 2.

    • The county zoning regulations must allow at least one accessory dwelling unit by right on a lot or parcel containing a single-family dwelling.
    • The unit may be attached, detached, or internal.
    • The county may not require owner occupancy, a familial, marital, or employment relationship between occupants, or impact fees; private restrictive covenants remain possible but cannot be required as a permit, license, or use condition.
    • A county may charge up to $250 for a one-time ADU application-review fee, in addition to usual building fees.
    • Applicable building codes, fire codes, and public-health and safety regulations still apply.
    • The county may require expedited sanitation review for an ADU on a parcel with existing public water and wastewater capacity; the 15-day expedited-review provision terminates September 30, 2029.
    • The statute applies to a county that exercises zoning powers; it does not itself create county zoning where none exists.

    maximum one-time application-review fee: <= 250 USD (Usual building fees may also be required.) · expedited sanitation review: 15 days (Parcel must have existing public water and wastewater service with capacity.)

    “In jurisdictional areas where the board of county commissioners has established zoning regulations under this part, the regulations must allow a minimum of one accessory dwelling unit by right on a lot or parcel that contains a single-family dwelling.”
    One more reviewed finding on this topic
    • Allowed (with conditions) — Accessory dwelling units in Montana municipalities that exercise zoning powers under MCA Title 76, chapter 2, part 3.
      “A municipality shall adopt regulations under this chapter that allow a minimum of one accessory dwelling unit by right on a lot or parcel that contains a single-family dwelling.”
  • Well permitLimited

    New groundwater developments in Montana using 35 gallons per minute or less and no more than 10 acre-feet per year.

    • All water uses starting after June 30, 1973, require a water right either through a water-use permit or an exception to the permitting process.
    • The development may qualify for the exception; qualification is not automatic.
    • Completed groundwater uses that meet the permit exception receive a Groundwater Certificate rather than a water permit.
    • A permitted water right is required for a combined appropriation from the same source by two or more wells or developed springs exceeding 10 acre-feet, regardless of flow rate.
    • All lots in a multi-phase subdivision must share a combined water-use limit of 10 acre-feet per year to qualify for a permit exception.
    • Beginning January 1, 2026, a water user intending to develop water use through a permit exception must file a Notice of Intent with DNRC before using water from an exempt well.
    • DNRC reviews a correct and complete Notice of Intent within 10 business days; if eligible, it authorizes the Notice of Intent and gives the user five years to complete the project, put the water to use, and file a Notice of Completion.
    • If the proposed use is not eligible, the Notice of Intent is denied and the user is directed to the water-right permit process.
    • The Notice of Intent filing fee is $400.
    • An authorized Notice of Intent expires after five years, with an opportunity for one five-year extension.

    maximum flow rate: <= 35 gpm · maximum annual volume: <= 10 acre-feet per year · Notice of Intent fee: 400 USD (Beginning January 1, 2026) · Notice of Intent review period: 10 business days (For a correct and complete Notice of Intent) · authorized Notice of Intent term: 5 years (One five-year extension opportunity is available)

    “Permit Exceptions, a.k.a. Exempt Wells: Small groundwater developments that use 35 gpm or less and do not exceed 10 acre-feet per year are known as “exempt wells” and may qualify for an exception to the water permit process.”
    4 more reviewed findings on this topic
    • Limited — New groundwater wells or developed springs serving a beneficial use in Lincoln County, Montana, outside the boundaries of a controlled groundwater area and outside a stream depletion zone.
      “when the appropriation is outside a stream depletion zone, is 35 gallons a minute or less, and does not exceed 10 acre-feet a year”
    • Limited — A groundwater well or developed spring in a Montana stream depletion zone, if a Lincoln County parcel were within a DNRC-designated stream depletion zone and outside a controlled groundwater area.
      “when the appropriation is within a stream depletion zone, is 20 gallons a minute or less, and does not exceed 2 acre-feet a year”
    • Required — New groundwater wells or developed springs serving a beneficial use in Lincoln County, Montana, when the appropriation exceeds the applicable statutory permit-exception thresholds or lies inside a controlled groundwater area.
      “A Beneficial Water Use Permit is required for all new or expanded uses of surface water and groundwater unless the use falls under an exception to permitting requirements.”
    • Required — Surface-water uses and groundwater uses exceeding 35 gallons per minute or 10 acre-feet per year in Montana.
      “Water Permits: A water permit is required for all surface water use and groundwater uses over 35 gallons per minute (gpm) or 10 acre-feet per year.”
  • Mandatory utility hookupConditional

    Water-supply and wastewater-disposal arrangements for subdivision parcels in Lincoln County subject to Montana sanitation review.

    • A Certificate of Subdivision Approval identifies the potable water source and wastewater disposal method for the property.
    • The source may be a private well, municipal water system, or cistern.
    • Wastewater may be disposed through a drainfield/septic system or municipal wastewater facility.
    • The source does not establish a countywide requirement that every property connect to public water or sewer.
    “The COSA outlines what the use of the property is [...] what the potable water source will be [...] and where wastewater will be disposed”
  • Short-term rentalsLimited

    Short-term rentals operated in Montana.

    • A Property Manager license is required unless the operator qualifies for an exemption under MCA § 37-56-104 or MCA § 50-51.
    • Local land-use, lodging, tax, and public-accommodation requirements may also apply.

    application fee: 50 USD

    “Short Term Rentals: A Property Manager license is required for short term rentals unless an operator qualifies for an exemption”
  • Campground & park staysLimited

    Camping in Montana Fish, Wildlife & Parks public-use sites.

    • Camping is prohibited except in areas specifically designated or marked for camping.
    • A camping unit, vehicle, equipment, or personal items may not be left overnight without a person present.
    • Camping longer than 7 nights at one or more campsites in a public use area during any consecutive 30-day period is prohibited unless otherwise posted by the department.
    • Designated occupancy limits must not be exceeded.
    • Special-use-permit terms must be followed unless otherwise posted.
    • Campsites must be vacated by 1 p.m. on the day of departure; camping facilities must be vacated by 12 p.m. on the day of departure.

    maximum camping duration: <= 7 nights per consecutive 30-day period (unless otherwise posted by the department) · campsite departure time: 1 p.m. · camping-facility departure time: 12 p.m.

    “Unless otherwise posted by the department, within a public use site it is prohibited to: [...] camp at one or more campsites in a public use area for a period of longer than 7 nights during any consecutive 30-day period, beginning with the first night occupied unless otherwise posted by the department;”
    One more reviewed finding on this topic
    • Limited — Dispersed and designated-campground temporary camping on legally accessible Montana state trust land administered by DNRC.
      “Dispersed camping is allowed on state trust land with the appropriate permit and with certain restrictions. Dispersed camping on state trust land is allowed with a Conservation License. Camping that is incidental to hunting or fishing is permitted through your conservation license, and no additional permitting is required. Group camping requires a special recreational use license. On leased or licensed land: 2 days On unleased/unlicensed land: 16 days within a 30-day period Within designated campground: 16 days within a 30-day period”
  • county zoning authorityGeneral

    Montana county boards of commissioners' authority to adopt zoning regulations, including in unincorporated portions of established jurisdictional areas.

    • The board of county commissioners must have adopted a growth policy pursuant to Title 76, chapter 1.
    • Zoning may be adopted for all or parts of the jurisdictional area in accordance with Title 76, chapter 2, part 2.
    • Within unincorporated portions of an established jurisdictional area, the board may establish zoning regulations by resolution or divide the county into zoning districts.
    • Zoning regulations may regulate the erection, construction, reconstruction, alteration, repair, location, or use of buildings or structures and the use of land.
    • An action challenging creation of a zoning district or adoption of zoning regulations must be commenced within 6 months after the board's order.
    • Regulations in one district may differ from those in other districts.
    • The statute also states that zoning regulations may not treat manufactured housing or factory-built housing units differently from other residential units, subject to the statutory presumption concerning placement.

    challenge period: 6 months (after the date of the board order creating the district or adopting the regulations)

    “For the purpose of promoting the public health, safety, morals, and general welfare, a board of county commissioners that has adopted a growth policy pursuant to chapter 1 is authorized to adopt zoning regulations for all or parts of the jurisdictional area in accordance with the provisions of this part.”
    One more reviewed finding on this topic
    • General — Montana county boards of commissioners adopting zoning regulations for all or parts of their jurisdictional areas, including unincorporated portions where the statutory prerequisites are met.
      “a board of county commissioners that has adopted a growth policy pursuant to chapter 1 is authorized to adopt zoning regulations”
  • county building authorityGeneral

    Montana counties may adopt and enforce building codes and require construction permits for residential construction in unincorporated county areas, subject to the statutory certification, geographic, code-content, and permit requirements.

    • A county may adopt a building code by ordinance or resolution, or authorize adoption by administrative action.
    • A county may adopt its building code on a countywide basis unless a city or town within the county has adopted a building code; the county may not enforce its county building code within that city or town.
    • The county code-enforcement program must be certified by the Montana Department of Labor and Industry.
    • The current adopted code, current fee list, and current enforcement plan must be filed with and approved by the Department.
    • Inspectors must satisfy the stated state-licensing or approved national-certification requirements.
    • Except for voluntary incentive-based energy-conservation standards, the county may not adopt or enforce a building code more stringent than the code adopted by the Department or required by state law.
    • The county may prohibit construction from commencing until the required permit is issued after compliance is shown.
    • The general construction-permit requirement applies to buildings subject to Title 50, chapter 60, parts 1 through 4.
    • State agency-owned buildings remain under state Department jurisdiction for plan review, permitting, and inspections.
    “The local legislative body of a county, city, or town may adopt a building code to apply to the county, city, or town by an ordinance or resolution, as appropriate: (a) adopting a building code; or (b) authorizing the adoption of a building code by administrative action.”
    One more reviewed finding on this topic
    • General — Montana counties' authority to adopt and enforce building codes and require building-code administration for construction in county areas, including unincorporated areas.
      “The local legislative body of a county, city, or town may adopt a building code to apply to the county, city, or town by an ordinance or resolution, as appropriate: (a) adopting a building code; or (b) authorizing the adoption of a building code by administrative action.”

Inside cities and towns in Lincoln County

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

  • Zoning districtsPublished (with conditions)

    The City of Libby within Lincoln County, Montana.

    • The official map is specifically for the City of Libby and does not establish countywide or unincorporated-area zoning districts.
    • The map identifies Agriculture, Suburdan, Business, Business Residential, Industrial, Medical, Parks & Open Space District, Residential A, Residential B, and Residential C districts.
    • The map states a date of November 26, 2012 and identifies revision dates through October 4, 2012.
    • Parcel boundaries are for general reference only and should not be relied on for precision.
    “Official Libby Zoning Map Zoning Agriculture Suburdan Business Business Residential Industrial Medical Parks & Open Space District Residential A Residential B Residential C”

Still unanswered

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

  • Minimum dwelling size — Residential dwellings in Lincoln County, including land subject to county subdivision regulations or localized zoning districts.
  • Setbacks — Setbacks for development in unincorporated Lincoln County outside any incorporated municipality or separately adopted district.
  • Lot coverage — Lot coverage for development in unincorporated Lincoln County, including the Lower Yaak Zoning District.
  • Building height — Building height in unincorporated Lincoln County, including the Lower Yaak Zoning District.

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 Lincoln County, Montana

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

Lincoln County scores 74/100 on the Bolthole Index, a strong county profile. Its strengths: deep seclusion — about 3,776 people within 15 miles and a stronger property-autonomy legal backdrop.

Do you need a building permit in Lincoln County, Montana?

Lincoln County does not require a county building permit for a home in unincorporated areas, and it enforces county zoning. Onsite septic is permitted by Lincoln County Health Department (Environmental Health). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

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

Living in an RV on your own land in Lincoln County is limited to specific cases: Multiple-space recreational vehicle projects and permanent RV placement parks on land within Lincoln County but outside municipal boundaries. The regulations apply to all lands within Lincoln County exclusive of municipal boundaries. Projects providing multiple RV spaces must obtain a facility license from the Montana Department of Public Health and Human Services when also constituting a trailer court, work camp, youth camp, or campground. A tiny home is limited to specific cases. Confirm with the county before relying on it.

How much does land cost in Lincoln County, Montana?

Land in Lincoln County runs about $4,690 per acre, based on the latest county data.

What is the water situation in Lincoln County?

Lincoln County gets about 32" of rain a year, with severe drought in roughly 11.7% of years.

How remote is Lincoln County?

A typical private-land location has about 3,776 people within 15 miles and 370,264 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Lincoln compares in Montana

Compare side-by-side →See all 56 Montana counties ranked →