Bolthole Index

Deer Lodge County, Montana

Building permits, zoning and land rules in Deer Lodge County, Montana

66Index Score / 100
#21 of 56 in Montana

Anaconda-Deer Lodge County, Montana requires building permits throughout the county, and new residential work cannot start until the physical permit is issued1. Zoning works through development districts that the county's Planning Department administers, and septic permits come separately from Tri-County Environmental Health23.

At a glance

Building permit
Required throughout the county; obtain the physical permit before starting work1
Zoning
Development-district regulations apply; use the county planning map to identify the parcel's district2
Septic
Tri-County Environmental Health permits onsite systems; subdivision history and site conditions affect review345
Wells
A county well permit is required in Anaconda-Deer Lodge County6
RV living
Long-term occupancy on private land was not confirmed; ask the Planning Department about the parcel's district7
Tiny homes
Occupancy and minimum dwelling size were not confirmed; ask Planning before choosing a design7
Owner-builder
A state contractor-licensing exemption may apply, but county permits and inspections still apply8

Who to call

Building permits

Anaconda-Deer Lodge County Building Inspector

County building permits and help with the building process; electrical, plumbing and mechanical permits and inspections are outside this office's scope

406-563-4011

A-DLC Courthouse, First Floor, 800 Main Street, Anaconda, MT 59711

Zoning

Anaconda-Deer Lodge County Planning Department

Development-district identification and applications for development, building and demolition permits

406-563-4010

ADLC Courthouse, First Floor, 800 Main Street, Anaconda, MT 59711

Septic permits

Tri-County Environmental Health

Environmental-health service for Anaconda-Deer Lodge, Granite and Powell counties; county claims identify it as the onsite wastewater permitting authority

406-563-4066

A-DLC Courthouse, Third Floor, 800 Main Street, Anaconda, MT 59711

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

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Do you need a building permit in Deer Lodge County, Montana?

Yes. Anaconda-Deer Lodge County requires building permits throughout the county, and new residential construction cannot begin until the paperwork is final and the physical permit has been obtained1. The county's certified building-code program is residential-only9. Electrical, plumbing and mechanical permits and inspections belong to the Montana Department of Labor and Industry rather than the county Building Inspector10. Montana exempts an owner working on the owner's property from the construction-contractor licensing chapter in qualifying circumstances, but that exemption does not waive building, trade or inspection requirements8. The permit holder must notify the inspector when work is ready and provide access, but the complete county inspection sequence and any general certificate-of-occupancy requirement could not be confirmed; ask the Building Inspector before scheduling work1112.

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

The Anaconda-Deer Lodge County Building Inspector is the local building-permit contact at 406-563-4011, in the A-DLC Courthouse, First Floor, 800 Main Street, Anaconda, MT 5971112. Planning, reached at 406-563-4010 in the same courthouse, posts the building, development and demolition applications7. A new-home application needs an Administrative Development Permit and a full plan set from a registered design professional or engineer; the departments require at least two weeks to review a complete application and plans13. Residential building fees are published, including a plan-review charge equal to 25% of the building-permit fee14. Because the local certified program is residential-only, ask the Building Inspector where to file a nonresidential project9.

Does Deer Lodge County have zoning?

Yes. Anaconda-Deer Lodge County's Development Permit System acts as zoning throughout the county through development districts, rather than one uniform set of dimensional standards1516. Use the ADLC Planning Map to identify the parcel's district, then read that district's regulations in the Development Permit System2. In the Opportunity Development District, new or expanded principal and accessory structures have a 35-foot front setback and 10-foot side and rear setbacks, subject to any superseding stream-bank or environmental standard17. The same district has a 2.5-acre minimum lot size and requires 50 feet of lot width at the building setback line18. In the East Valley Development District, new or expanded structures have a 35-foot front setback and 10-foot side and rear setbacks19. The Opportunity Development District also lists single-family dwellings, including Class A and Class B manufactured homes, at one unit per lot of record, subject to an Administrative Development Permit20. Montana law requires county zoning to allow at least one accessory dwelling unit by right on a lot with a single-family dwelling21. Those district figures do not apply countywide, and a countywide minimum dwelling size, lot coverage or building height could not be confirmed; ask Planning for the mapped district's standards7.

How do septic permits work in Deer Lodge County?

Tri-County Environmental Health requires a permit to construct, alter or repair an individual onsite wastewater system in Deer Lodge County4. Applications must document the property, site plan, nearby wells and drainfields, surface water, slopes, soils and groundwater; the fee is paid to the treasurer in the county where the property lies22. Septic application fees are $100 with a certified installer and $150 with an uncertified installer, with separate charges for some evaluations, repeat inspections and other services23. Systems installed by non-certified installers must be inspected; certified installers may self-inspect but are asked to give 24 hours' notice before burial, and an as-built drawing is due within 30 days after installation24. Septic permits stay with Tri-County Environmental Health, separate from the county building permit and from the Montana Department of Labor and Industry trade permits.410 Only about 9% of county soils are rated without severe limits for a conventional drain field, so establish feasibility before fixing the house site25. If an approved public sewer is readily available within 200 feet of the property line and the system operator approves, wastewater must connect to it unless connection is unavailable or economically impractical26.

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

We could not confirm a countywide rule for long-term RV occupancy, temporary camping on private land or tiny-home occupancy in Deer Lodge County; ask Planning how the parcel's development district treats the proposed unit before buying land or moving it onsite7. Montana's camping limit for Fish, Wildlife & Parks sites does not answer private-land occupancy27. Property with human occupancy that is not served by municipal sewer needs wastewater facilities approved by Tri-County Environmental Health28. A tiny home may also trigger the countywide building-permit process, so take its plans and specifications to both Planning and the Building Inspector297. We also could not confirm a countywide minimum dwelling size; Planning should confirm it and the manufactured-home rule for the mapped district7.

Building a home in Deer Lodge County: the steps, in order

  1. Identify the development district on the Planning Map and confirm its rules with Planning2.
  1. Prepare the Administrative Development Permit and a full plan set from a registered design professional or engineer13.
  1. Resolve septic, well and subdivision-sanitation review with Tri-County Environmental Health; a county well permit is required for well drilling303132.
  1. Ask whether the construction site needs a driveway approach permit; when applicable, it is a prerequisite to building-application approval33.
  1. Submit the complete building application and fees, allowing at least two weeks for review1314.
  1. Obtain the physical permit before construction, then give the required notice for inspections1.

What should you check before buying land in Deer Lodge County?

Start with buildability, not the asking price. Only about 9% of Deer Lodge County soils are rated without severe limitations for a conventional septic drain field, while about 39.4% of the land has slopes of 15% or less2534. Ask Tri-County Environmental Health whether the parcel has a sanitation approval or restriction: parcels created before subdivision regulations and parcels over 20 acres receive local review, and additional testing or engineering may be needed5. Confirm the development district and allowed use with Planning, then verify legal access and ask whether the construction site requires a driveway approach permit233. We could not confirm the county's current floodplain-development process, so ask Planning before placing a home, fill or access road in a mapped hazard area7. A new well that uses more than 35 gallons per minute or 10 acre-feet per year needs a state water permit, while smaller wells may qualify for an exception that is not automatic.3536 The effective property-tax rate is about 0.8%, and the median annual bill is about $1,7063738.

Watch-outs

  • Electrical, plumbing and mechanical permits and inspections are handled by the Montana Department of Labor and Industry, not the county Building Inspector12.
  • No countywide RV, tiny-home, minimum-dwelling-size or setback answer was confirmed; ask Planning for the rules in the parcel's mapped development district7.
  • A county well permit is required for well drilling, and new residential sites may also need septic and driveway approvals before the building application can be approved639.

Sources

  1. Building Permit Application, quoted and re-checked
  2. Planning Department, quoted and re-checked
  3. Septic Systems / Wells, quoted and re-checked
  4. Tri-County Environmental Health Onsite Wastewater Treatment Regulations, quoted and re-checked
  5. Sanitation in Subdivisions, quoted and re-checked
  6. Septic Systems / Wells, quoted and re-checked
  7. Anaconda-Deer Lodge County Planning Department (adlc.us)
  8. MCA — Construction Contractors, quoted and re-checked
  9. Certified City, County and Town Programs, quoted and re-checked
  10. Building Inspector, quoted and re-checked
  11. Building Permits, quoted and re-checked
  12. Anaconda-Deer Lodge County Building Inspector (adlc.us)
  13. Building Permit Application, quoted and re-checked
  14. Building Permit Application, quoted and re-checked
  15. Planning Department, quoted and re-checked
  16. Planning Department, quoted and re-checked
  17. adlc.us, quoted and re-checked
  18. adlc.us, quoted and re-checked
  19. Chapter 24 — Development Permit System, quoted and re-checked
  20. Opportunity Development District, quoted and re-checked
  21. 76-2-215. Accessory dwelling units -- regulations -- restrictions, MCA (Montana statewide rule), quoted and re-checked
  22. Tri-County Onsite Wastewater Treatment Regulations, quoted and re-checked
  23. Tri-County Onsite Wastewater Treatment Regulations, quoted and re-checked
  24. Tri-County Environmental Health Onsite Wastewater Treatment Regulations, quoted and re-checked
  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. Building Permit Application, quoted and re-checked
  27. Public Use Rules and Regulations (Montana statewide rule), quoted and re-checked
  28. Tri-County Onsite Wastewater Treatment Regulations, quoted and re-checked
  29. Building Inspector, quoted and re-checked
  30. Building Permit Application, quoted and re-checked
  31. Septic Systems / Wells, quoted and re-checked
  32. Sanitation in Subdivisions, quoted and re-checked
  33. Building Permit Application, quoted and re-checked
  34. Share of land at 15% slope or less: Bolthole Index county data
  35. Exempt Well Updates and Information (Montana statewide rule), quoted and re-checked
  36. Exempt Well Updates and Information (Montana statewide rule), quoted and re-checked
  37. Effective property tax rate: Bolthole Index county data
  38. Median property tax bill: Bolthole Index county data
  39. Building Permit Application, quoted and re-checked

Written October 9, 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

Unlike 4 of its 6 neighbors, Deer Lodge County requires a building permit for a home.

RuleDeer Lodge CountySilver Bow CountyGranite CountyRavalli CountyJefferson CountyBeaverhead CountyPowell County
Building permitRequiredRequiredLimitedNot requiredLimitedNot requiredRequired
County zoningYesYesYesYesYesNoYes
Septic permitsAnaconda-Deer Lodge County Env. Health Dept.Butte-Silver Bow Env. Health Div.Tri-County SanitarianRCEHCounty Env. HealthBeaverhead CountyTri-County Env. Health

County locator

Deer Lodge County in Montana

66
County map
Deer Lodge County highlighted among the Montana counties · colored by Index score

How Deer Lodge County scores

Seclusion82100% ev.
Self-Sufficiency41100% ev.
Admin Boringness4290% ev.
Durability52100% ev.
Property Autonomy83100% ev.
Carry Cost83100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$300kTypical home
0.8%Property tax
$2,334Land / acre
22.3"Annual rain
17.5% of yrsSevere drought
0.1 / yr (+0.1)Mid-century 100°F days
16.1 daysMid-century dry spell
1.15" (+7.9%)Mid-century 1-day rain
1.21×Wildfire change factor
100%Forward climate coverage
$1,604Home insurance / yr
2.1% / yrInsurance growth
0.84%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
321,187People within 2 hr
11,424Radius comparison (15 mi)
13.1People / sq mi
45.9%Federal land
39.4%Land at 15% slope or less
9%Soils rated "not limited" for septic (strict USDA rating)
39,094 acWorkable land screen
58.6%Wooded land
23.1 tonsBiomass / forest ac
38.3°FAvg temp

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Cities and towns in Deer Lodge 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.

Anaconda-Deer Lodge County

Answers from the rulebook for Deer Lodge County

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

Deer Lodge County rules

  • Building permitRequired

    Building construction in Anaconda-Deer Lodge County, including new residential construction.

    • Building permits are required for the entire County.
    • For new residential construction, an Administrative Development Permit is required before the Building Permit Application can be approved.
    • A septic and/or well permit and a Driveway Approach Permit are required before approval depending on the individual construction site.
    • The Building Permit and Administrative Development Permit require a full set of plans from a Registered Design Professional or Engineer before review.
    • The Building/Planning Department requires a minimum of two weeks from receipt of completed application and plans for review.
    • Construction must begin within six months of Building Permit approval.
    • A Building Permit expires six months after issuance if construction has not started.
    • After construction begins, construction should be completed within six months; extensions may be requested before expiration, not less than one month prior.
    • Extensions may be requested due to weather conditions and/or financial difficulties.
    • If an extension request is not received before expiration, the Building Permit becomes null and void and the process must be restarted.
    • Twenty-four-hour notice is required for all inspections, including concrete.
    • Electrical, plumbing, and mechanical inspection and permitting are handled by the Montana Department of Labor and Industry rather than the county Building Inspector.

    residential building permit fee for valuation $1 to $500: $12.50 USD · residential building permit fee for valuation $501 to $2,000: $12.50 for first $500 plus $1.75 for each additional $100 or fraction thereof, to and including $2,000 USD · residential building permit fee for valuation $2,001 to $25,000: $46.25 for first $3,000 plus $7.50 for each additional $1,000 or fraction thereof, to and including $25,000 USD · residential building permit fee for valuation $25,001 to $50,000: $216.75 for first $26,000 plus $5.50 for each additional $1,000 or fraction thereof, to and including $50,000 USD · residential building permit fee for valuation $50,001 to $100,000: $348.75 for first $50,000 plus $3.75 for each additional $1,000 or fraction thereof, to and including $100,000 USD · residential building permit fee for valuation $100,001 and up: $536.25 for first $100,000 plus $2.50 for each additional $1,000 or fraction thereof USD · plan review fee: 25% of Building Permit Fee USD

    “It’s important to obtain Building Permits as they are required for the entire County.”
    3 more reviewed findings on this topic
    • Required — New residential construction in Anaconda-Deer Lodge County.
      “ABSOLUTELY DO NOT BEGIN PROJECT UNTIL ALL PAPERWORK IS FINALIZED AND PHYSICAL PERMIT HAS BEEN OBTAINED”
    • Required — New residential construction and other work submitted through the county Building Permit Application.
      “ABSOLUTELY DO NOT BEGIN PROJECT UNTIL ALL PAPERWORK IS FINALIZED AND PHYSICAL PERMIT HAS BEEN OBTAINED”
    • Required — Building work in the entire Anaconda-Deer Lodge County jurisdiction.
      “Building Permits as they are required for the entire County.”
  • Building code adoptedAdopted (with conditions)

    Deer Lodge County residential building-code enforcement.

    • The state certification list identifies the county program as residential-only.
    • The county program is limited to building code enforcement identified as B.

    code category: B (residential only)

    “Deer Lodge County | B (residential only) | Greg Bahr | 563-4010 | County”
    One more reviewed finding on this topic
    • Adopted — County building-code administration.
      “The Anaconda-Deer Lodge County Commission hereby adopts and incorporates per MCA 50-60-301(1)(a), the International Swimming Pool and Spa Code, as provided by the Administrative Rules of Montana (ARM) 24.301.175 as required by the Department of Labor and Industry, Building and Measurement Standards Bureau.”
  • County-wide zoningPresent (with conditions)

    Development-district land-use regulation administered through the Anaconda-Deer Lodge County Development Permit System.

    • The source describes development-district regulations rather than a single undifferentiated countywide district.
    • The applicable development district must be identified on the ADLC Planning Map.
    “Use the ADLC Planning Map to identify your development district along with fire protection and voting information. Regulations for each development district are in the Development Permit System.”
    2 more reviewed findings on this topic
    • Present (with conditions) — Land in Anaconda-Deer Lodge County assigned a development district on the ADLC Planning Map.
      “our DPS System, which acts as "zoning" throughout the County via Development Districts.”
    • Present (with conditions) — Development regulation through the Anaconda-Deer Lodge County Development Permit System and its development districts.
      “Use the ADLC Planning Map to identify your development district along with fire protection and voting information. Regulations for each development district are in the Development Permit System.”
  • Local zoningPresent (with conditions)

    Land use regulation throughout Anaconda-Deer Lodge County through Development Permit System development districts.

    • The official county page directs applicants to identify the applicable development district using the ADLC Planning Map.
    • Regulations for each development district are contained in the Development Permit System.
    • The county describes the Development Permit System as acting as zoning throughout the County via Development Districts.
    • Specific requirements vary by the applicable development district.
    “We recognize many residents are not familiar with our DPS System, which acts as "zoning" throughout the County via Development Districts.”
    2 more reviewed findings on this topic
    • Present (with conditions) — Development districts identified by Anaconda-Deer Lodge County's Planning Map.
      “Regulations for each development district”
    • Varies (with conditions) — County aggregate of local land-use regulation across Anaconda-Deer Lodge County development districts.
      “Use the ADLC Planning Map to identify your development district along with fire protection and voting information. Regulations for each development district are in the Development Permit System.”
  • Zoning districtsPublished (with conditions)

    Development districts within Anaconda-Deer Lodge County.

    • The parcel's district must be identified on the ADLC Planning Map.
    • Regulations for each district are in the Development Permit System; this record does not assert one uniform countywide dimensional standard.
    “Use the ADLC Planning Map to identify your development district along with fire protection and voting information. Regulations for each development district are in the Development Permit System.”
    3 more reviewed findings on this topic
    • Published (with conditions) — County development districts administered through the Development Permit System.
      “Use the ADLC Planning Map to identify your development district along with fire protection and voting information. Regulations for each development district are in the Development Permit System.”
    • Published (with conditions) — County development districts administered through the Development Permit System.
      “Use the ADLC Planning Map to identify your development district along with fire protection and voting information. Regulations for each development district are in the Development Permit System.”
    • Published (with conditions) — Anaconda-Deer Lodge County development districts.
      “throughout the County via Development Districts.”
  • Minimum lot sizeSpecified

    Lots in the Opportunity Development District (ODD) of Anaconda-Deer Lodge County, for new and expanded principal structures and accessory structures.

    • The minimum lot standard appears in the same development-standards section governing new and expanded principal and accessory structures.
    • The ODD standards may be superseded by stream bank setbacks or other environmental standards as applicable.
    • The ordinance also specifies a minimum lot width at the building setback line of 50 feet.

    minimum lot size: 2.5 acres · minimum lot width at building setback line: 50 feet

    “(3) Minimum Lot size: 2.5 acres. (4) Minimum Lot width at Building Setback Line: 50 feet.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Lots containing new or expanded principal structures or accessory structures within the Opportunity Development District (ODD) of Anaconda-Deer Lodge County.
      “(3) Minimum Lot size: 2.5 acres. (4) Minimum Lot width at Building Setback Line: 50 feet.”
  • SetbacksSpecified

    All new and expanded principal structures and accessory structures within the Opportunity Development District (ODD) of Anaconda-Deer Lodge County.

    • The standards may be superseded by stream bank setbacks or other environmental standards as applicable.
    • The district's permitted single-family dwelling use is subject to an Administrative Development Permit unless otherwise noted.
    • Other uses not listed as permitted are special uses subject to Major Development Permits.

    front lot line setback: 35 feet · side lot line setback: 10 feet · rear lot line setback: 10 feet

    “The following standards apply to all new and expanded Principal Structures and Accessory Structures within the ODD. These standards may be superseded by stream bank Setbacks or other environmental standards as applicable: (1) Setbacks: (a) Front Lot Line - 35 feet. (b) Side Lot Lines - 10 feet. (c) Rear Lot Line - 10 feet.”
    4 more reviewed findings on this topic
    • District specific (with conditions) — New and expanded principal structures and accessory structures within the Opportunity Development District (ODD) of Anaconda-Deer Lodge County.
      “The following standards apply to all new and expanded Principal Structures and Accessory Structures within the ODD. These standards may be superseded by stream bank Setbacks or other environmental standards as applicable: (1) Setbacks: (a) Front Lot Line - 35 feet. (b) Side Lot Lines - 10 feet. (c) Rear Lot Line - 10 feet.”
    • District specific (with conditions) — All new and expanded principal structures and accessory structures in the Opportunity Development District (ODD).
      “The following standards apply to all new and expanded Principal Structures and Accessory Structures within the ODD. These standards may be superseded by stream bank Setbacks or other environmental standards as applicable: (1) Setbacks: (a) Front Lot Line - 35 feet. (b) Side Lot Lines - 10 feet. (c) Rear Lot Line - 10 feet.”
    • District specific (with conditions) — Any new or expanded principal structures and accessory structures in the East Valley Development District (EVDD).
      “The following standards apply to any new or expanded Principal Structures and Accessory Structures within the EVDD. In some cases, Setbacks may be superseded by environmental standards: (1) Structural Setbacks: (a) Front Lot Line: 35 feet. (b) Side Lot Lines: 10 feet. (c) Rear Lot Line: 10 feet.”
    • District specific (with conditions) — Principal and accessory structures within the Lost Creek Loop Road Subarea of the Lost Creek Development District (LCDD).
      “The following standards apply only to Principal Structures and Accessory Structures within the Lost Creek Loop Road Subarea. These standards may be superseded by stream bank Setbacks or other environmental standards as applicable: (1) Setbacks: (a) Front Lot Line - 5 feet. (b) Side Lot Lines - 5 feet. (c) Rear Lot Line - 5 feet.”
  • Manufactured homesAllowed (with conditions)

    Single-family dwelling units, including Class A and Class B manufactured homes, in the Opportunity Development District.

    • The use is subject to an Administrative Development Permit unless otherwise noted.
    • The provision states one unit per lot of record.

    units per lot of record: 1 unit

    “Single-family Dwelling Units, including Class A Manufactured Homes and Class B Manufactured Homes (one unit per Lot of record).”
  • Accessory dwellingsLimited

    Accessory residential units in the Medium Density Residential Development District.

    • Accessory residential units are treated as special uses in the MDRD.
    • A Major Development Permit is required.
    • The source is a 2020 planning-board packet and does not establish the rule for every development district.
    “Pursuant to Sec. 24-83 Special Uses, tourist homes and accessory residential units1are both considered a special use in the MDRD and special uses require permission via a Major Development Permit (MDP).”
  • Who permits septicCounty (with conditions)

    Deer Lodge County portion of the Tri-County Environmental Health onsite wastewater program.

    • The program serves Deer Lodge, Granite, and Powell Counties.
    • The regulations were adopted by the three county Boards of Health and incorporate Montana state standards.
    “TRI-COUNTY ENVIRONMENTAL HEALTH Serving Deer Lodge, Granite and Powell Counties”
    One more reviewed finding on this topic
    • Local (with conditions) — Onsite wastewater systems in Deer Lodge County within the Tri-County Environmental Health jurisdiction.
      “permitting, and licensing to the Tri-County area for septic systems”
  • Septic permitRequired

    Septic and sanitation review for applicable parcels and new residential construction in Deer Lodge County.

    • Requirements vary by parcel history and size.
    • Parcels created with sanitary restrictions require DEQ review to lift the restriction.
    • Pre-regulation parcels require local Environmental Health review; additional testing and engineering may be required.
    • Parcels over 20 acres are subject to local review.

    parcel-size threshold: > 20 acres (Parcels over 20 acres are subject to local review.)

    “Please be advised for new residential construction, that an Administrative Development Permit (ADP), as well as a Septic and/or Well Permit and a Driveway Approach Permit (depending on each individual construction site) is required before a Building Permit Application can be approved.”
    3 more reviewed findings on this topic
    • Required — Individual onsite wastewater treatment systems in Deer Lodge County.
      “It shall be unlawful for any Person to construct, alter or repair an Individual Onsite Wastewater Treatment System within the County unless that Person holds a valid Permit issued by Tri-County Environmental Health”
    • Required — New residential construction and septic-system permitting in Deer Lodge County.
      “Please be advised for new residential construction, that an Administrative Development Permit (ADP), as well as a Septic and/or Well Permit and a Driveway Approach Permit (depending on each individual construction site) is required before a Building Permit Application can be approved.”
    • Required — Construction, alteration, or repair of an individual onsite wastewater treatment system in Deer Lodge County.
      “unless that Person holds a valid Permit issued by Tri-County Environmental Health”
  • Septic inspectionLimited

    Onsite wastewater systems installed in Deer Lodge County.

    • The Department must inspect all systems installed by non-certified installers.
    • Certified installers may perform self-inspections.
    • Certified installers are asked to give 24 hours notice before burying the system so staff may inspect.
    • A complete as-built drawing must be provided within 30 days of completion.
    • The permit expires if the system has not been installed, inspected, and approved within one year.

    as-built submission deadline: 30 days (after completed installation) · inspection notice: 24 hours (certified installers before burying the system)

    “The Department must inspect all systems installed by non-certified installers. Certified installers may perform self-inspections but are asked to give twenty four (24) hours notice before burying the system, for the purpose of allowing staff the option of inspecting.”
    2 more reviewed findings on this topic
    • Limited — Septic-system installation inspections in the Tri-County jurisdiction.
      “Being a certified installer is not required in order to install septic systems in the Tri-County jurisdiction. Certified Installers have demonstrated knowledge and awareness of correct procedures, permitting and inspection of systems through examination. They are allowed to perform self-inspections of their installations.”
    • Limited — Installed onsite wastewater systems in Deer Lodge County.
      “The Department must inspect all systems installed by non-certified installers.”
  • Off-grid sanitationLimited

    Human occupancy on property in Deer Lodge County not served by municipal sewer.

    • Any property not served by municipal sewer with human occupancy must have wastewater facilities approved by Tri-County Environmental Health.
    • Where approved public sewer is readily available within 200 feet and connection is approved, wastewater must be discharged to the public system unless not readily available or economically impractical.

    public sewer availability distance: <= 200 feet (unless not readily available or economically impractical)

    “Any property not served by municipal sewer in which there is human occupancy shall be equipped with wastewater facilities approved by the Tri-County Environmental Health Department.”
  • Well permitRequired

    Installation or alteration of residential, commercial, or public water wells in Deer Lodge County.

    • The county source states a well permit is required in Anaconda-Deer Lodge County.
    • The official application indicates property evaluation for compliance with county and state regulations before issuance.
    “Well Drilling - A well permit is required in Anaconda-Deer Lodge County only. Please use the Well Permit Application (PDF)”
    3 more reviewed findings on this topic
    • Required — Well drilling in Anaconda-Deer Lodge County.
      “Well Drilling - A well permit is required in Anaconda-Deer Lodge County only.”
    • Required — Well drilling in Anaconda-Deer Lodge County.
      “Well Drilling - A well permit is required in Anaconda-Deer Lodge County only.”
    • Required — Well drilling in Anaconda-Deer Lodge County.
      “A well permit is required in Anaconda-Deer Lodge County only.”
  • Mandatory utility hookupConditional

    Water and sewer availability or connection prerequisites for new residential construction.

    • The building application requires septic and/or well permitting depending on the individual construction site.
    • A parcel may have a restriction that does not allow a building with water or sewer until DEQ lifts the restriction.
    “A parcel may have been created with a restriction that does not allow a building with water or sewer. Such parcels must be reviewed by DEQ to “lift this restriction”.”
    One more reviewed finding on this topic
    • Conditional — Wastewater connection for property in Deer Lodge County subject to the Tri-County onsite wastewater regulations.
      “If a DEQ approved public collection and treatment system is readily available within a distance of 200 feet of the property line for connecting to a new source of wastewater, or as a replacement for a failed system, and the owner or managing entity of the public collection and treatment system approves the connection, wastewater must be discharged to the public system unless considered “not readily available” or “economically impractical””
  • Subdividing landRegulated (with conditions)

    Parcels created through subdivision and sanitation review in Deer Lodge County.

    • Properties under 20 acres may have a DEQ-reviewed Certificate of Subdivision Approval with an approved septic-and-well site plan.
    • A parcel restricted from a building with water or sewer must be reviewed by DEQ to lift the restriction.
    • Parcels created before subdivision regulations require local Environmental Health Department review to determine whether septic and well sites are possible; additional tests and engineering may be required.
    • Parcels over 20 acres are subject to local review.

    parcel size threshold: < 20 acres (Properties under 20 acres may have a DEQ-reviewed COSA.) · parcel size threshold: > 20 acres (Parcels over 20 acres are subject to local review.)

    “A parcel may also have been created prior to subdivision regulations. In these cases, local review by the Environmental Health Department is required”
    3 more reviewed findings on this topic
    • Regulated (with conditions) — Subdivision sanitation and local environmental-health review for parcels in Deer Lodge County.
      “A parcel may also have been created prior to subdivision regulations. In these cases, local review by the Environmental Health Department is required to determine if septic and well sites are possible. Additional tests and engineering services may be required. Parcels over 20 acres in size are also subject to local review.”
    • Regulated (with conditions) — Subdivision-created parcels and sanitation review in Deer Lodge County.
      “Properties under 20 acres may have a Certificate of Subdivision Approval (COSA) which means the parcel has been reviewed by Montana Department of Environmental Quality (DEQ). These parcels have an approved site plan showing septic and well locations.”
    • Regulated (with conditions) — Subdivision-created parcels and development in Deer Lodge County.
      “A parcel may also have been created prior to subdivision regulations. In these cases, local review by the Environmental Health Department is required to determine if septic and well sites are possible. Additional tests and engineering services may be required.”
  • Driveway accessRequired

    New residential construction where a driveway approach permit is applicable to the site.

    • The driveway approach permit requirement depends on the individual construction site.
    • It is required before the building permit application can be approved.
    “Please be advised for new residential construction, that an Administrative Development Permit (ADP), as well as a Septic and/or Well Permit and a Driveway Approach Permit (depending on each individual construction site) is required before a Building Permit Application can be approved.”
    One more reviewed finding on this topic
    • Required — Driveway approach access associated with new residential construction in Deer Lodge County.
      “Please be advised for new residential construction, that an Administrative Development Permit (ADP), as well as a Septic and/or Well Permit and a Driveway Approach Permit (depending on each individual construction site) is required before a Building Permit Application can be approved.”
  • Short-term rentalsLimited

    Tourist homes, as defined by the planning-board packet, in the Medium Density Residential Development District.

    • Tourist homes are treated as a special use in the MDRD.
    • A Major Development Permit is required.
    • The source is a 2020 planning-board packet and does not establish the rule for every development district.
    “Pursuant to Sec. 24-83 Special Uses, tourist homes and accessory residential units1are both considered a special use in the MDRD and special uses require permission via a Major Development Permit (MDP).”
  • Permit feesPublished (with conditions)

    Residential building permit and plan-review fees.

    • Commercial building fees require reference to the ADLC Planning Department.
    • The plan-review fee is 25% of the building permit fee.

    plan review fee: 25 percent of building permit fee · building permit fee for valuation $1 to $500: 12.5 USD · building permit fee for valuation $100001 and up: 536.25 plus 2.50 for each additional 1000 USD (or fraction thereof)

    “$100,001 and UP $536.25 for first $100,000 plus $2.50 for each additional $1,000 or fraction thereof”
    2 more reviewed findings on this topic
    • Published (with conditions) — Tri-County onsite wastewater installation and use permits affecting Deer Lodge County.
      “Certified Installer $100 Uncertified Installer $150 Septic Tank/Pump Chamber ONLY $50 Extension of septic permit (1 additional year) $50”
    • Published (with conditions) — Residential building permit fees shown on the Anaconda-Deer Lodge County building permit application.
      “Plan Review Fee (25% of Building Permit Fee: ________________________ Total Amount Due: ___________________”
  • Permit processPublished (with conditions)

    County building-permit application process for new residential construction.

    • Submit a full set of plans from a registered design professional or engineer.
    • The Building/Planning Department requires a minimum of two weeks from receipt of a completed application and plans for review.
    • Construction must begin within six months of approval; extensions may be requested before expiration, at least one month before expiration.
    • Twenty-four-hour notice is required for all inspections.

    minimum review time: >= 2 weeks (from receipt of completed application and plans) · construction start deadline: <= 6 months (from Building Permit approval)

    “The Building Permit and the Administrative Development Permit require a full set of plans from a Registered Design Professional or Engineer before a review of this application can take place. The Building/Planning Department requires a minimum of two (2) weeks from the receipt of completed application and plans for review.”
    2 more reviewed findings on this topic
    • Published (with conditions) — Tri-County onsite wastewater permit applications affecting Deer Lodge County.
      “All applications for Permits shall be made to Tri- County Environmental Health, acting for the Health Officer or his/her representative. Permits shall be issued upon compliance by the applicant with provisions of these regulations.”
    • Published (with conditions) — New residential building permit applications in Anaconda-Deer Lodge County.
      “Please be advised for new residential construction, that an Administrative Development Permit (ADP), as well as a Septic and/or Well Permit and a Driveway Approach Permit (depending on each individual construction site) is required before a Building Permit Application can be approved.”

Montana rules that apply here

  • Owner-builder exemptionConditional

    A homeowner performing plumbing installation personally in a residence for the owner's personal use, including property in Deer Lodge County where state plumbing jurisdiction applies.

    • The homeowner must perform the plumbing installation themselves.
    • The residence must be for the owner's personal use.
    • The residence must not be built on speculation of resale.
    • The residence must not be intended as a rental property.
    • Certified local governments may enforce the plumbing code within their jurisdiction; other areas fall under state jurisdiction.
    • All plumbing must meet the Uniform Plumbing Code and required inspections must be conducted before plumbing work is covered.
    “Homeowners do not need to obtain a plumbing permit provided he/she is doing the plumbing installation themselves and the residence is for the owner's personal use and not built on speculation of resale or intended as a rental property.”
    2 more reviewed findings on this topic
    • Available (with conditions) — An owner performing construction work on the owner's property under Montana's construction-contractor registration statute; this is not a determination that county building, electrical, plumbing, mechanical, septic, or development permits are unnecessary.
      “(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;”
    • Available — 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.
      “(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”
  • 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.”
    One more reviewed finding on this topic
    • Required — Projects subject to Montana state building permits, including projects outside certified local-government jurisdictions.
      “It is the responsibility of the permit hold to notify the inspector when work is ready for inspection and to provide access for required 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.”
  • Living in an RVLimited

    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.
    • On leased or licensed land, the stay limit is 2 days.
    • On unleased or unlicensed land, the stay limit is 16 days within a 30-day period.
    • Within a designated campground, the stay limit is 16 days within a 30-day period.
    • The local DNRC field office should be contacted to confirm whether land is leased.
    • Pets must be leashed or otherwise controlled.
    • Overnight horses must be restrained, may not remain in a stream riparian zone for more than one hour, and must use certified weed-seed-free feed.
    • Campfires are generally permitted within designated campgrounds and on unleased or unlicensed land but are not allowed on leased land.
    • Cutting firewood requires a separate permit from the local DNRC field office, and fireworks are not allowed on state land.
    • State Parks, Fishing Access Sites, and Wildlife Management Areas are managed by Montana Fish, Wildlife and Parks rather than under this DNRC camping page.

    RV/trailer distance from customary access point: <= 50 ft (Motorized vehicles must be parked within 50 feet; the page states the camper or trailer may not be driven farther to set it up.) · maximum stay on leased or licensed land: 2 days · maximum stay on unleased or unlicensed land: 16 days within a 30-day period · maximum stay within designated campground: 16 days within a 30-day period

    “TRAILER/RV etc. Camp within 50 ft of a customary access point. Motorized vehicles must be parked within 50 ft of a customary access point. You may not drive further to set up a camper or trailer. 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”
  • Building in a floodplainRequired

    New development within a designated Special Flood Hazard Area in Montana.

    • The applicant must check with the local floodplain administrator to determine whether an SFHA has been designated.
    • Covered development includes placement of fill, roads, bridges, culverts, transmission lines, irrigation facilities, storage of equipment or materials, excavation, new construction or development, placement or replacement of manufactured homes, and new construction, additions, or substantial improvements to residential and commercial buildings.
    • Permit applications are obtained from the local floodplain administrator.
    • Application fees and timelines are established by the local government and vary widely throughout the state.
    “Anyone planning new development within a designated Special Flood Hazard Areas (SFHA).”
  • 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.

  • Minimum dwelling size — Minimum dwelling-size requirements in county development districts.
  • Lot coverage — Lot coverage requirements in county development districts.
  • Building height — Building-height requirements in county development districts.
  • Camping on your land — Temporary camping on private land in Deer Lodge County.
  • Tiny homes — Tiny-home occupancy in Deer Lodge County.
1 more unanswered
  • Agricultural exemption

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.

Water rights & wells in Deer Lodge County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Montana’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellExempt up to a limit

Montana's exempt-well exception (85-2-306 MCA) was tightened after Upper Missouri Waterkeeper v. DNRC (2024), and from Jan 1, 2026 appropriators must file a Notice of Intent with DNRC before putting exempt groundwater to use.

Limit: 35 gpm or less AND ≤10 acre-ft/yr; a combined appropriation exceeding 10 acre-ft needs a permit regardless of flow rate

Montana DNRC — Water Rights Permit Exceptions (Exempt Wells) ↗

Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Montana state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Deer Lodge County, Montana

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

Deer Lodge County scores 66/100 on the Bolthole Index, a strong county profile. Its strengths: a stronger property-autonomy legal backdrop and manageable long-term carry cost. Watch-outs: thin water margin (22.3″/yr rainfall).

Do you need a building permit in Deer Lodge County, Montana?

Deer Lodge County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Anaconda-Deer Lodge County Environmental Health Department (Tri-County). 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 Deer Lodge County?

Living in an RV on your own land in Deer Lodge 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. Confirm with the county before relying on it.

How much does land cost in Deer Lodge County, Montana?

Land in Deer Lodge County runs about $2,334 per acre, based on the latest county data.

What is the water situation in Deer Lodge County?

Deer Lodge County gets about 22.3" of rain a year, with severe drought in roughly 17.5% of years. On water rights, Deer Lodge County lies in the Warm Springs Ponds Controlled Groundwater Area — Contamination-driven CGWA (Clark Fork Superfund); new wells restricted/permit-required pending remediation..

How remote is Deer Lodge County?

A typical private-land location has about 11,424 people within 15 miles and 486,625 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Deer Lodge compares in Montana

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