Bolthole Index

Rosebud County, Montana

Building permits, zoning and septic rules in Rosebud County, Montana

49Index Score / 100
#42 of 56 in Montana

Rosebud County, Montana does not require a county building permit, though a Montana state building permit can still apply to projects covered by the statewide building code12. Unincorporated Rosebud County has no county zoning regulations, county zoning-based minimum dwelling size or county zoning-based building setbacks; Colstrip and Forsyth run their own zoning, and airport areas have separate controls345. Septic permits come from the Rosebud County Sanitarian6.

At a glance

Building permit
Not required by Rosebud County; a Montana state building permit can still apply to larger, commercial or multi-unit buildings78
Zoning
No countywide zoning; Colstrip, Forsyth and airport areas have separate local controls3
Tiny homes and setbacks
No county zoning-based minimum home size or building setback in unincorporated areas; other parcel controls can still apply459
Septic permit
Required, issued through the county Sanitarian's office1011
Owner-builder
Allowed -- there is no county building permit to be exempt from1213
Well permit
Exempt statewide for groundwater use of 35 gpm or less and 10 acre-feet a year or less14
Driveway from a county road
No-fee work permit required from the Road Foreman before building an approach15
Subdivision lots
Regulated; where zoning is absent, lot size and density are set with health-authority consultation1617

Who to call

Planning & zoning

Rosebud County Planning & Permitting (County Planner)

Building/electrical permit questions, zoning, floodplain permits and subdivision review for Rosebud County

406-346-2251

1251 Main St, PO Box 47, Forsyth, MT 59327

Septic permits

Rosebud County Sanitarian

Septic (wastewater) permits and other environmental health permitting for Rosebud County

406-699-9787

1251 Main Street, PO Box 47, Forsyth, MT 59327

Roads & driveways

Rosebud County Road Department

County road work permits and encroachment permits, including approaches built from a county road onto private land

406-346-2261

2975 Old Highway 10, PO Box 1117, Forsyth, MT 59327

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

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

Rosebud County does not require county building or electrical permits, but Montana may require permits for projects within state jurisdiction1. Montana has adopted a uniform building code for residential and commercial buildings, while certified cities, towns and counties may run local code programs2.

The state program exempts farm and ranch buildings, private garages and storage buildings for an owner's own use, and residential buildings with fewer than five dwelling units unless they serve transient guests8. A typical single-family home therefore needs neither a Rosebud County building permit nor a Montana state building permit18.

Covered commercial, transient-guest and larger multi-unit projects go through the Montana Building Codes Program19. For a project requiring a state permit, the permit holder must request an inspection at least 24 hours ahead, and the inspector has 72 hours after notice to perform it20.

Who handles building, zoning and floodplain permits in Rosebud County?

Rosebud County Planning & Permitting, also called the County Planner's office, oversees land development, subdivision review, floodplain regulation and environmental permitting for the county21. The office publishes floodplain applications and instructions, subdivision materials, and development or construction permit forms22. The office is at 1251 Main St, PO Box 47, Forsyth, MT 59327, and its commissioners' and floodplain-administrator line is 406-346-225121. Office hours are Monday through Friday, 8 a.m. to 5 p.m., and by appointment21. Because Rosebud County does not issue a general building permit, this is still the right first call for a rural buyer: it can identify the county process for a parcel and explain which forms apply22.

Does Rosebud County have zoning?

Unincorporated Rosebud County has no county zoning regulations3. Colstrip and Forsyth have their own municipal zoning, while airport affected-area ordinances outside those cities regulate land uses within the airport area of influence3. In unincorporated Rosebud County, county zoning sets neither a minimum dwelling size nor building setbacks45. We could not confirm any county limit on lot coverage, building height, accessory dwellings or temporary camping, so ask Planning & Permitting about those21. County zoning likewise does not restrict tiny-home occupancy outside Colstrip, Forsyth and the airport areas9. Subdivision review, floodplain rules, sanitation requirements and parcel covenants can still control where or how you build35.

For subdivision lots where zoning is not in effect, maximum density and minimum lot size are established in consultation with local and state health authorities rather than by one numeric countywide minimum17. An agricultural-only land division can qualify for an exemption, but it requires a land covenant and does not allow residential, commercial or industrial buildings that require water or sewer unless the covenant is revoked and the parcel undergoes the applicable review23. Ask Planning & Permitting which controls apply to the specific parcel21.

How do septic permits work in Rosebud County?

Rosebud County requires septic permits, and the Rosebud County Sanitarian is the permitting authority610. The Sanitarian's office provides the septic application and handles related environmental-health permitting24. Reach the office at 406-699-9787, 1251 Main Street, PO Box 47, Forsyth, MT 5932724.

Only about 19.1% of Rosebud County soils are free of severe limitations for a conventional septic drain field, so establish septic feasibility before choosing a building site or relying on a proposed lot split25. Montana still requires a local drainfield permit even when a subdivision has a state Certificate of Subdivision Approval26. The county sources do not confirm whether a septic inspection is required, so ask the Sanitarian about site evaluation, design and inspection steps for the parcel24.

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

Unincorporated Rosebud County has no county zoning restriction on tiny-home occupancy outside the airport areas9. We could not confirm a county rule on temporary camping or on living full time in one RV on a single parcel, so ask Planning & Permitting before relying on it21. County zoning also imposes no minimum dwelling size or building setback there45. That answer does not override septic, floodplain, subdivision, access, airport-area or private-covenant requirements, and municipal zoning in Colstrip or Forsyth can change the answer for affected land105. Ask Planning & Permitting to identify those parcel-specific controls before moving in21.

Developments with two or more RV spaces within the county commissioners' jurisdictional area require subdivision review and approval before any portion is rented or leased27. Developments with two or more mobile or manufactured-home spaces in that jurisdictional area likewise undergo park and subdivision review, with siting, parking and utility standards28. Those park rules are separate from the absence of county zoning restrictions on one tiny home in unincorporated Rosebud County9.

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

  1. Ask Rosebud County Planning & Permitting whether the parcel is affected by municipal or airport-area zoning, subdivision review, or the regulated flood-hazard area21291630.
  2. If the project is in the regulated flood-hazard area, submit the county's floodplain application, required fee, scaled plans and applicable state or federal permits; the floodplain permit is additional to other required approvals30. Published fees are $450 for a simple application and $950 for a complex application31.
  3. Establish septic feasibility and apply through the Rosebud County Sanitarian610.
  4. Check the water source: groundwater use of 35 gallons per minute or less and 10 acre-feet a year or less may qualify for the exempt-well process; larger uses need a state permit14.
  5. Confirm whether the Montana Building Codes Program covers the project; common single-family, farm and private-storage buildings are exempt, but other projects can require state permits8.
  6. Obtain a no-fee work permit before building an approach from a county road to a private road15.

What should you check before you buy land in Rosebud County?

Rosebud County averages 14.7 inches of precipitation a year and has sat in severe drought in about 12.7% of years, so confirm your water source and well yield before closing3233. Only 19.1% of the county's soils are free of severe limitations for a conventional septic drain field, so budget for a site evaluation and a possible engineered system25. About 58.8% of the county's land sits at 15% slope or less, and roughly 8% is wooded -- useful context for driveway grading and clearing a building site3435. Federal land covers 10.2% of the county, so check whether a parcel borders public land before you count on access or grazing36. Rosebud County's effective property tax rate is about 0.6%, with a median property tax bill of $1,191 a year3738. The nearest city of 100,000 or more is roughly 97 miles from the county center, with a population density of 1.6 people per square mile -- rural enough that services and response times can run longer than in town3940.

Watch-outs

  • Development in Rosebud County's regulated flood-hazard area generally requires a separate floodplain permit in addition to other approvals30.
  • Unincorporated Rosebud County has no county zoning-based minimum dwelling size or building setback, but septic, floodplain, subdivision, access and private-covenant requirements can still affect a site45.
  • Unincorporated Rosebud County has no county zoning regulations, but Colstrip and Forsyth have municipal zoning and airport affected-area ordinances regulate land uses around airports outside those cities3.
  • The county road work-permit rule covers an approach built from a Rosebud County road onto a private road; check with the Road Department if your access involves a different kind of road4115.

Sources

  1. County Planner - Rosebud County, quoted and re-checked
  2. Montana Building Codes Program, quoted and re-checked
  3. Rosebud County Growth Policy, quoted and re-checked
  4. Rosebud County Growth Policy, quoted and re-checked
  5. Rosebud County Growth Policy, quoted and re-checked
  6. County Planner - Rosebud County, quoted and re-checked
  7. County Planner - Rosebud County (2026 county census)
  8. Building Permits, quoted and re-checked
  9. Rosebud County Growth Policy, quoted and re-checked
  10. County Planner - Rosebud County, quoted and re-checked
  11. County Planner - Rosebud County (2026 county census)
  12. Montana law on county zoning and building authority
  13. County Planner - Rosebud County (2026 county census)
  14. Exempt Well Updates and Information, quoted and re-checked
  15. Road Department - Rosebud County, quoted and re-checked
  16. Subdivision Regulations of Rosebud County, quoted and re-checked
  17. Rosebud County Subdivision Regulations, quoted and re-checked
  18. Building Permits (Montana statewide rule), quoted and re-checked
  19. Building Permits (Montana statewide rule), quoted and re-checked
  20. Is a State Building Permit Needed?, quoted and re-checked
  21. Rosebud County Planning & Permitting (County Planner) (rosebudcountymt.gov)
  22. County Planner - Rosebud County, quoted and re-checked
  23. Rosebud County Subdivision Regulations, quoted and re-checked
  24. Rosebud County Sanitarian (rosebudcountymt.gov)
  25. 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
  26. Engineering Infrastructure & Subdivisions (Montana statewide rule), quoted and re-checked
  27. Rosebud County Subdivision Regulations — Revised 2018, quoted and re-checked
  28. Rosebud County Subdivision Regulations — Revised 2018, quoted and re-checked
  29. Rosebud County Growth Policy, quoted and re-checked
  30. Rosebud County Floodplain Regulations, quoted and re-checked
  31. Flood Plain Application Fee Schedule, quoted and re-checked
  32. Annual precipitation: Bolthole Index county data
  33. Share of years in severe drought: Bolthole Index county data
  34. Share of land at 15% slope or less: Bolthole Index county data
  35. Wooded share of land: Bolthole Index county data
  36. Federal land share: Bolthole Index county data
  37. Effective property tax rate: Bolthole Index county data
  38. Median property tax bill: Bolthole Index county data
  39. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
  40. Population density: Bolthole Index county data
  41. Rosebud County Road Department (rosebudcountymt.gov)

Written October 10, 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.

Found land here? Start a Property Hunt →

Compared with neighboring counties

Like 5 of its 6 neighbors, Rosebud County requires no county building permit for a home.

RuleRosebud CountyTreasure CountyBig Horn CountyCuster CountyPowder River CountyPrairie CountyYellowstone County
Building permitNot requiredNot requiredNot requiredLimitedNot requiredNot requiredNot required
County zoningNoNoNot publishedYesNoNoYes
Septic permitsCounty SanitarianCounty SanitarianCounty Public Health Dept.County Env. HealthCounty SanitarianCounty SanitarianRiverStone Health

County locator

Rosebud County in Montana

49
County map
Rosebud County highlighted among the Montana counties · colored by Index score

How Rosebud County scores

Seclusion90100% ev.
Self-Sufficiency15100% ev.
Admin Boringness88100% ev.
Durability41100% ev.
Property Autonomy83100% ev.
Carry Cost84100% 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 →

$233kTypical home
0.6%Property tax
$716Land / acre
14.7"Annual rain
12.7% of yrsSevere drought
14.4 / yr (+11.4)Mid-century 100°F days
21.1 daysMid-century dry spell
0.99" (+4.3%)Mid-century 1-day rain
1.24×Wildfire change factor
100%Forward climate coverage
$2,128Home insurance / yr
-0.6% / yrInsurance growth
0.41%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
303Radius comparison (15 mi)
1.6People / sq mi
10.2%Federal land
58.8%Land at 15% slope or less
19.1%Soils rated "not limited" for septic (strict USDA rating)
547,907 acWorkable land screen
8%Wooded land
9.8 tonsBiomass / forest ac
45.3°FAvg temp

Scout Rosebud County

Camp here before you commitBook a few nights nearby on Hipcamp →Already own land here?Earn money hosting campers — get $100 when you become a Hipcamp host →

Some links are affiliate or referral links — we may earn a commission, at no cost to you.

Property hunt

Find land. Bring the promising ones back.

Search live inventory elsewhere, then cost and vet each candidate here. No copied listings, account, or paid data feed.

View your full hunt →
ZillowLand & lotsRealtor.comLand listingsLandSearchRural & vacant land

Each button opens a current land search for Rosebud County. Listing sites control their own results and filters.

Analyze a property
Add setup-cost allowances

Use rough quotes or placeholders. Blank fields count as $0.

Working estimate

—land + entered setup costs
Asking $ / acre
—
Setup allowance
—
All-in $ / acre
—

A planning estimate, not a valuation or contractor quote. The USDA benchmark includes farm land and buildings; it is context, not a parcel comp.

Before an offer

Parcel due diligence

0/8 checked

Saved properties and checklist progress stay on this device. Bolthole Index does not receive them.

Cities and towns in Rosebud 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: Forsyth

Answers from the rulebook for Rosebud County

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

Rosebud County rules

  • Building permitNot required

    Building and electrical permits administered by Rosebud County.

    • The county page states that permits may still be required by the State of Montana.
    “Building and electrical permits are not required through Rosebud County, but may be required by the State of Montana.”
  • Owner-builder exemption · follows from the permit answerNot needed

    Unincorporated Rosebud County: no county building permit is required, so there is no permit to be exempt from and you may build your own home. State licensing for electrical, plumbing and HVAC work may still apply.

    • The county page states that permits may still be required by the State of Montana.
    “Building and electrical permits are not required through Rosebud County, but may be required by the State of Montana.”
  • County-wide zoningAbsent

    Countywide zoning regulations administered by Rosebud County, with municipal zoning in Colstrip and Forsyth excluded from this absence finding.

    • The official county growth policy states that municipal zoning exists within Colstrip and Forsyth.
    • Airport affected-area regulations outside Forsyth and Colstrip may restrict incompatible land uses; these are separate airport-area ordinances, not countywide zoning.
    “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
    One more reviewed finding on this topic
    • Absent — County zoning regulations in unincorporated Rosebud County; the source distinguishes municipal zoning and airport-area ordinances.
      “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
  • Local zoningVaries (with conditions)

    Aggregate local zoning status across Rosebud County, including the municipalities of Colstrip and Forsyth and airport-affected areas outside those municipalities.

    • The County aggregate does not mean Rosebud County administers each local ordinance.
    • Colstrip and Forsyth have municipal zoning regulations.
    • Airport affected-area ordinances outside Forsyth and Colstrip restrict incompatible land uses and establish a board of adjustment.
    “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
  • Zoning districtsPartial

    Countywide zoning-district publication and land-use controls, aggregated from Rosebud County’s official Growth Policy.

    • The Growth Policy states there are no county zoning regulations outside the municipalities of Colstrip and Forsyth.
    • Municipal zoning within Colstrip and Forsyth is administered by those municipalities, not Rosebud County.
    • Airport affected-area regulations apply outside Forsyth and Colstrip and restrict incompatible land uses around airports; the cited source does not publish a complete district map or all district standards.
    • Rosebud County’s floodplain regulations and subdivision regulations remain separate land-use controls, not countywide zoning districts.
    “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
  • Minimum dwelling sizeNone

    County zoning-based minimum dwelling size requirements in unincorporated Rosebud County.

    • The county growth policy states that municipal zoning exists in Colstrip and Forsyth; those municipalities may impose separate dimensional rules.
    • Airport Affected Area Regulations apply around airports outside Forsyth and Colstrip.
    • For subdivisions where no zoning regulations are in effect, county subdivision regulations provide that maximum density and minimum lot size must be established in consultation with local and state health authorities; this is a lot-size/density rule, not a minimum dwelling-floor-area rule.
    • Subdivision, floodplain, septic, health, access, and applicable state building-code requirements still apply.
    “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
    One more reviewed finding on this topic
    • None — County zoning-based minimum dwelling size in unincorporated Rosebud County.
      “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
  • Minimum lot sizeSpecified

    Lots in subdivisions governed by the Rosebud County Subdivision Regulations.

    • Where no zoning regulations are in effect, maximum density and minimum lot size must be established in consultation with local and state health authorities.
    • The cited provision does not state a single numeric countywide minimum lot size.

    minimum lot size determination: Established in consultation with local and state health authorities where no zoning regulations are in effect.

    “minimum lot size must be established in consultation”
  • SetbacksNone

    County zoning-based building setback requirements in unincorporated Rosebud County.

    • The county growth policy states that municipal zoning exists in Colstrip and Forsyth; those municipalities may impose separate setback rules.
    • Airport Affected Area Regulations apply around airports outside Forsyth and Colstrip and may restrict incompatible land uses.
    • Subdivision, floodplain, septic, health, access, and applicable state building-code requirements still apply.
    • This claim concerns county zoning-based setbacks; it does not eliminate parcel-specific covenants, airport restrictions, floodplain requirements, road or access requirements, or other non-zoning controls.
    “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
    One more reviewed finding on this topic
    • None — General county zoning setbacks for dwellings in unincorporated Rosebud County.
      “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
  • Living in an RVLimited

    Developments providing two or more spaces for recreational camping vehicles within the jurisdictional area of the Rosebud County Board of County Commissioners.

    • The regulations apply within the jurisdictional area of the Board of County Commissioners, not automatically countywide.
    • Developments providing two or more recreational-vehicle spaces are reviewed under Section VII-F Recreational Vehicle Park Standards.
    • The subdivision must be submitted for review and approved by the governing body before any portion may be rented or leased.
    • Proposed subdivisions containing six or more spaces are reviewed under Section IV; proposed subdivisions containing five or fewer spaces are reviewed under Section III.
    • A completed application and development plan must be submitted, and the plan must show the space layout and proposed location of each recreational vehicle or other unit.
    • Recreational vehicles must be separated from each other and other structures by at least 15 feet.
    • No recreational vehicle space may be less than 25 feet from a public street or highway right-of-way.
    • Recreational-vehicle-park density may not exceed 25 recreational-vehicle spaces per acre of gross site area.
    • If the subdivision is also a trailer court, work camp, youth camp, or campground as defined in section 50-52-102, MCA, final approval requires a Montana Department of Public Health and Human Services license.

    minimum separation between recreational vehicles and other structures: >= 15 feet (Accessory structures such as attached awnings are considered part of the recreational vehicle for this separation requirement.) · minimum distance from public street or highway right-of-way: >= 25 feet · maximum recreational-vehicle spaces: <= 25 spaces per acre of gross site area · review threshold: >= 6 spaces (Six or more spaces use Section IV review; five or fewer use Section III review.)

    “Developments that will provide two or more spaces for recreational camping vehicles”
  • Tiny homesUnrestricted

    Tiny-home occupancy under county land-use regulation in unincorporated Rosebud County areas outside the airport area-of-influence regulations; Colstrip and Forsyth municipal areas are excluded.

    • The source states that county zoning does not apply outside the municipalities of Colstrip and Forsyth, but airport-area ordinances outside those municipalities restrict incompatible land uses and provide for a board of adjustment.
    • Municipal rules in Colstrip and Forsyth are outside this claim.
    • County subdivision regulations, floodplain regulations, septic permits, and applicable state requirements may still apply.
    “There are no zoning regulations in Rosebud County other than those within the municipalities of Colstrip and Forsyth.”
  • Manufactured homesLimited

    Developments providing two or more mobile/manufactured-home spaces within the jurisdictional area of the Rosebud County Board of County Commissioners.

    • The regulations apply within the jurisdictional area of the Board of County Commissioners, not automatically countywide.
    • Developments providing two or more mobile/manufactured-home spaces are reviewed under Section VII-E Mobile/Manufactured Home Park Standards and, as appropriate, major Section IV or minor Section III subdivision procedures.
    • The subdivision must be submitted for review and approved by the governing body before any portion may be rented or leased.
    • Proposed subdivisions containing six or more spaces are reviewed under Section IV; proposed subdivisions containing five or fewer spaces are reviewed under Section III.
    • A completed application and development plan must be submitted, and the plan must show the space layout and proposed location of each mobile home or other unit.
    • Homes must be at least 25 feet from a property boundary abutting a public street or highway right-of-way and at least 15 feet from other park boundary lines.
    • The pad must be at least 10 feet from the street serving it; the pad may occupy no more than one-third of the space; and the home plus roofed accessory structures may occupy no more than two-thirds of the space.
    • Homes or attached structures may not be within 20 feet of another home or attached structure; detached structures may not be within five feet of a home or attached structure.
    • At least two off-street parking spaces must be provided per home space, with a driveway at least 10 feet wide; one guest parking space is required per 10 home spaces.
    • Each home must be skirted within 30 days after being moved to a park space using fire-resistant material similar to the home exterior.
    • Electrical and gas installations must comply with applicable codes and standards, including the specified state standards or referenced National Fuel Gas Code and LP-Gas Code where the state or another political subdivision does not assume jurisdiction.
    • If the subdivision is also a trailer court, work camp, youth camp, or campground as defined in section 50-52-102, MCA, final approval requires a Montana Department of Public Health and Human Services license.

    minimum distance from public street or highway right-of-way boundary: >= 25 feet · minimum distance from other park boundary lines: >= 15 feet · minimum distance from serving street: >= 10 feet · maximum mobile/manufactured-home pad area: <= 33.333333 percent of space (One-third of the space.) · maximum home and roofed accessory-structure area: <= 66.666667 percent of space (Two-thirds of the space.) · minimum separation from another mobile/manufactured home or attached structure: >= 20 feet · minimum separation from detached structure: >= 5 feet · minimum off-street parking: >= 2 spaces per mobile/manufactured-home space · minimum driveway width: >= 10 feet · guest parking: per 1 space per 10 mobile/manufactured-home spaces (Group parking may be provided.) · skirting deadline: <= 30 days after moving to a park space (Skirting must be fire-resistant material similar to the mobile/manufactured-home exterior.) · review threshold: >= 6 spaces (Six or more spaces use Section IV review; five or fewer use Section III review.)

    “Developments that will provide two or more spaces for mobile/manufactured homes”
  • Who permits septicCounty

    Septic permitting and related environmental permitting in Rosebud County.

    • The County Planner page identifies Rosebud County Planning & Permitting as a county-government department that administers county regulations and assists with environmental permitting requirements.
    • The Sanitarian’s office provides a Septic Permit Application.
    “Click on the following links to obtain information on the topics processed through the Sanitarian’s office. [...] Septic Permit Application”
  • Septic permitRequired

    Septic systems in Rosebud County.

    • The official county page states that Rosebud County requires septic permits.
    • A septic permit application is provided through the County Sanitarian’s office.
    “Rosebud County does require septic permits.”
  • Agricultural exemptionAvailable (with conditions)

    A land division outside a platted subdivision creating a parcel for agricultural use only under the Rosebud County Subdivision Regulations.

    • The parcel must be used only for production of livestock or agricultural crops.
    • No residential, commercial, or industrial buildings requiring water or sewer may be built on the parcel.
    • A covenant running with the land is required, with a signed and acknowledged recitation on the face of the survey and a separate recordable covenant document.
    • Agricultural purpose means raising crops, livestock, or timber and excludes residential structures and facilities for commercially processing agricultural products.
    • Any change to a non-agricultural use subjects the parcel to review as a minor subdivision.
    • Residential, commercial, or industrial structures may not be utilized, constructed, or erected on the parcel unless the covenant is revoked.
    • The parcel must meet the criteria for an agricultural designation under section 15-7-202, MCA.
    • The applicable exemption under the Sanitation in Subdivisions Act must be properly invoked for the DEQ review exemption.
    “parcel will be used only for the production of livestock or agricultural crops”
  • Subdividing landRegulated (with conditions)

    Surveying and subdivision of land within the jurisdictional area of the Rosebud County Board of County Commissioners.

    • 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 municipality 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 county governing bodies.
    • The regulations supplement other regulations, and where they conflict, the more restrictive requirements apply.
    • Subdivision approval remains subject to applicable zoning, state law, floodplain provisions, health and sanitation requirements, and other applicable regulations.
    • Subdivision exemptions require submission of a certificate of survey or qualifying instrument of conveyance and evidence and an affidavit affirming entitlement to the claimed exemption.
    “These regulations govern the surveying and subdivision of land within the jurisdictional area of the Board of County Commissioners (“Commissioners”) of Rosebud County.”
  • Driveway accessRequired

    An approach built from a Rosebud County road onto a private road.

    • A work permit is required for the described alteration of a county road.
    • The permit requires a form and approval by the Rosebud County Road Foreman.
    • To apply, the applicant must contact the Road Foreman at (406) 346-2261.
    • The work permit has no fee.
    • The source does not establish a requirement for every driveway or for roads that are not county roads.
    “A work permit is issued to a private party or an entity when they alter a county road; for example, when an approach is built from a county road onto a private road.”
  • Building in a floodplainRequired

    Establishing, altering, or substantially improving an artificial obstruction, nonconforming use, or development within Rosebud County's Regulated Flood Hazard Area, including mapped floodway and flood-fringe areas.

    • A Floodplain permit is generally required within the Regulated Flood Hazard Area, except for uses allowed without a permit under Section 5 and prohibited uses under Section 6.
    • The application must include a completed and signed application, required review fee, duplicate scaled plans, applicable federal or state permits or pending applications, and additional information demonstrating compliance with Sections 9 and 10.
    • The Floodplain Administrator reviews and approves, conditionally approves, or denies a correct and complete application within 180 days.
    • Complete applications require public notice, including newspaper publication, first-class mail to adjacent property owners, notice to DNRC, and additional FEMA and adjacent-community notice for watercourse alteration or relocation; interested parties must receive at least 15 days to comment.
    • Floodway projects must meet the general requirements, including an allowable Base Flood Elevation encroachment of 0.00 feet unless the required flood-hazard-area alteration and FEMA Conditional Letter of Map Revision are approved before permit issuance.
    • In the flood fringe or regulated flood hazard area without a floodway, the maximum allowable encroachment is 0.5 feet unless the required alteration approval and FEMA Conditional Letter of Map Revision occur before permit issuance; an encroachment analysis is not required for development in a flood fringe where an accompanying floodway has been designated.
    • Solid and hazardous waste disposal and individual or multiple family sewage disposal systems are prohibited unless they meet local health and sanitation regulations, are permitted under the floodplain regulations, and are designed to minimize or eliminate floodwater infiltration and contamination.
    • The floodplain permit is an added requirement and does not replace other approvals required by federal, state, or local law.
    • Upon approval, development generally must be completed within one year, subject to a possible additional one-year extension requested at least 30 days before the deadline; a compliance report is generally due within 30 days of completion.

    application decision deadline: 180 days (after receipt of a correct and complete application) · public comment period: >= 15 days (for interested parties after required notice) · allowable floodway Base Flood Elevation encroachment: 0 feet (unless required alteration approval and FEMA CLOMR occur before permit issuance) · maximum allowable encroachment without floodway: <= 0.5 feet (unless required alteration approval and FEMA CLOMR occur before permit issuance)

    “required for a person to establish, alter or substantially improve an artificial obstruction, nonconforming use or development within the Regulated Flood Hazard Area;”
  • Permit feesPublished (with conditions)

    Floodplain applications administered by Rosebud County Planning & Permitting.

    • Fees are non-refundable.
    • Simple Flood Plain Application fee is $450.00.
    • Complex Flood Plain Applications fee is $950.00.
    • Engineering and environmental vendors are charged by the vendor.
    • Information posted on the County website has no charge.
    • Reprints of applications and supporting documentation are subject to the Document Reproduction Fee Schedule.
    • Fees are payable to Rosebud County Treasurer.
    • The fee schedule is marked Revised April 2025; this is reported as a revision date, not an effective date.

    simple flood plain application fee: 450 USD · complex flood plain application fee: 950 USD

    “Fees are non-refundable. Simple Flood Plain Application $450.00 Complex Flood Plain Applications $950.00”
  • Permit processPublished

    County planning and permitting processes, including subdivision, floodplain, zoning, environmental permitting, and related development review in Rosebud County.

    • The County Planner page identifies county administration of subdivision, floodplain, and zoning regulations and links to the 2024 floodplain regulations, joint application instructions, joint application, fee schedule, subdivision materials, and development/construction permits.
    • Building and electrical permits are not required through Rosebud County, but may be required by the State of Montana.
    • Rosebud County requires septic permits.
    “Rosebud County Planning & Permitting is the department of county government [...] Flood Plain Joint Application Instructions [...] Development Permits / Construction Permits”

Montana rules that apply here

  • Building code adoptedAdopted (with conditions)

    Montana's uniform state building code for residential and commercial buildings statewide.

    • The currently listed codes are amended and adopted through Administrative Rules of Montana Title 24, Chapter 301.
    • Cities, counties, and towns may enforce local building codes, all or in part, only through certified local building-code-enforcement programs.
    • State-owned agencies must be permitted through the Montana Department of Labor and Industry.
    • The listed 2021 International Building, Residential, and Existing Building Codes and related codes are effective June 11, 2022; the listed ASME boiler and pressure-vessel codes are effective November 6, 2021.

    International Building Code edition: 2021 · International Residential Code edition: 2021 · effective date for listed principal codes: 2022-06-11 (ASME boiler and pressure-vessel codes listed on the official page are effective 2021-11-06)

    “In addition, the program is responsible for adopting a uniform state building code, which is enforced statewide for residential and commercial buildings across Montana.”
    2 more reviewed findings on this topic
    • Adopted (with conditions) — Residential and commercial buildings across Montana, including Rosebud County, under the Montana Building Codes Program.
      “The program is responsible for adopting a uniform state building code, which is enforced statewide for residential and commercial buildings across Montana.”
    • Partial — Montana's statewide building-code framework for residential and commercial construction.
      “In Montana, cities, counties and towns have the option to enforce local building, electrical, plumbing, and mechanical codes, all or in part (except for state-owned agencies, which must be permitted through this Department). These local building code enforcement programs must be certified by the BC Program. The remaining cities, counties and towns that have chosen not to enforce building codes, fall under the jurisdiction of the BC Program. [...] the program is responsible for adopting a uniform state building code, which is enforced statewide for residential and commercial buildings across Montana.”
  • InspectionsRequired

    Projects requiring a Montana state building permit.

    • The permit holder must call the building inspector at least 24 hours before a requested inspection.
    • The inspector has 72 hours from notification to perform the requested inspection.
    • This claim concerns state-administered inspections and does not establish a Rosebud County local inspection program.

    advance inspection notice: >= 24 hours · inspection performance window: <= 72 hours (measured from notification)

    “It is the responsibility of the permit holder to call the building inspector at least 24 hours before a requested inspection, and that the inspector have 72 hours from the notification to perform the requested inspection.”
    One more reviewed finding on this topic
    • Limited — Buildings and other projects requiring permits under Montana state building-code jurisdiction; certified local governments may perform inspections within their certified jurisdictional areas.
      “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.”
    2 more reviewed findings on this topic
    • Limited — Groundwater wells and other groundwater uses in Montana, including Rosebud County.
      “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.”
    • 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.”
  • 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.”

Still unanswered

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

  • Lot coverage — Lot-coverage requirements in Rosebud County, including unincorporated areas and incorporated municipalities where separately applicable.
  • Building height — Building-height requirements in Rosebud County, including unincorporated areas and incorporated municipalities where separately applicable.
  • Camping on your land — Temporary camping on private land in Rosebud County.
  • Septic inspection — Whether a septic-system inspection is required in Rosebud County.
  • Off-grid sanitation — Off-grid sanitation systems in Rosebud County.
1 more unanswered
  • Mandatory utility hookup

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 Rosebud County, Montana

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

Rosebud County scores 49/100 on the Bolthole Index, a solid county profile. Its strengths: deep seclusion — about 303 people within 15 miles and low administrative friction for a quiet rural property. Watch-outs: weak self-sufficiency basics: only 14.7″ of rain a year and elevated current hazard exposure.

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

Rosebud County does not require a county building permit for a home in unincorporated areas, and it has no county-wide zoning. Onsite septic is permitted by Rosebud County Sanitarian. 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 Rosebud County?

Living in an RV on your own land in Rosebud County is limited to specific cases: Statewide rule. RV, camper-trailer, and other trailer overnight use for general recreation on legally accessible Montana state trust land administered by DNRC. A Conservation License is required for dispersed camping on state trust land. RV or trailer camping must be within 50 feet of a customary access point; motorized vehicles must be parked within 50 feet of a customary access point, and the camper or trailer may not be set up farther away by driving beyond that point. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Rosebud County, Montana?

Land in Rosebud County runs about $716 per acre, based on the latest county data.

What is the water situation in Rosebud County?

Rosebud County gets about 14.7" of rain a year, with severe drought in roughly 12.7% of years.

How remote is Rosebud County?

A typical private-land location has about 303 people within 15 miles and 57,308 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Rosebud compares in Montana

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