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Q: Do I need a site plan for a permit in Montana?

Yes — site plans are a standard requirement for most building permit applications in Montana, whether you are submitting to a local building department or to the state. Montana's Building Codes Program (BC Program), administered by the Department of Labor & Industry's Business Standards Division, serves as the statewide permitting authority for all areas not covered by a locally certified program, and it requires a site plan with every application — showing property lines, all existing and proposed structures with dimensions, and setback distances, drawn to scale with a north arrow indicated. Cities that operate their own certified programs — including Billings, Bozeman, Missoula, Helena, Kalispell, and Great Falls — have similar or more detailed requirements: Billings requires a site plan showing all structures, decks, driveways, watercourses, and setbacks for both residential and commercial zoning compliance permits, and Bozeman requires a separate permit and site plan for each detached structure, submitted through its electronic ProjectDox portal. Common projects that trigger a site plan requirement include room additions, detached garages, ADUs, decks over 30 inches above grade, sheds, fence permits, demolition permits, retaining wall permits, and zoning compliance permits. Our site plans are not a survey, nor are they intended to replace one. MySitePlan delivers professionally drafted, permit-ready site plans starting at $99 — with no site visit required and a 24-hour turnaround guaranteed.

Q: Is a MySitePlan site plan the same as a survey?

No — a MySitePlan site plan is not a survey, and our site plans are not a survey, nor are they intended to replace one. A licensed land survey is conducted by a registered professional land surveyor who physically visits the property, establishes legal boundary markers, and certifies the results under their professional seal — a process that can take weeks and cost several hundred to several thousand dollars. MySitePlan produces professionally drafted site plans using GIS lot-line data and satellite imagery, without a site visit, at a flat rate starting at $99 with a 24-hour turnaround. For the vast majority of Montana building permit applications, HOA submissions, and zoning compliance permits, a drafted site plan is exactly what is required — not a certified survey. If your project does require a licensed land survey, MySitePlan refers customers to Surveyor Pros; for engineering plans, we refer to Engineering Express.

Q: How much does a site plan cost in Montana?

MySitePlan offers flat-rate pricing with no hidden fees — plans start at $99 and are delivered within 24 hours. Here is a full breakdown of available tiers: Basic Plot Plan ($99) shows property lines, primary structure roofline, lot dimensions, north arrow, and scale — great for initial project planning. Medium Site Plan ($119, our most popular option) adds measurements between features, trees, driveway, accessory structures, and swimming pool — the right choice for most Montana building permits, fence permits, deck permits, and HOA submissions. Detailed Site Plan ($159) adds paths, shrubs, lawn, landscaping, and septic/utility locations — ideal when Missoula County or another jurisdiction requires maximum detail. Commercial Detailed ($179) includes parking areas, ingress/egress, dumpster locations, and parking space counts. Commercial "The Works" ($279) adds legal setbacks, a custom plan size, DWG file, topography, impervious surface calculations, and a vicinity map — the comprehensive package for commercial site development in Billings, Bozeman, Kalispell, or any other Montana city. There are no surveyor costs, no travel fees, and no scheduling delays — just a professionally drafted plan at a straightforward price.

Q: How quickly can I get a site plan in Montana?

Every Montana order is delivered in 24 hours, guaranteed — no site visit, no scheduling, and no waiting for a contractor to fit you into their calendar. Simply place your order online with your property address and project details, and our Drafterra Certified drafters will produce your plan remotely using GIS lot-line data and satellite imagery. This matters in Montana because state-level plan review at the DLI typically averages two to three weeks once submitted — getting your site plan fast means you can get your application in the queue sooner. The 24-hour turnaround is our standard for every order, whether you are in Billings, Bozeman, a Flathead County property, or a remote unincorporated area served by the state Building Codes Program.

Q: Can I use a MySitePlan site plan for my Montana HOA architectural review submission?

Yes — MySitePlan site plans are widely used for HOA Architectural Control Committee and Design Review Board submissions throughout Montana. Montana HOAs commonly require a site plan showing property boundaries, existing structures, proposed improvements, and setback distances before approving exterior changes such as decks, fences, sheds, additions, driveways, pergolas, and pools. This is especially common in fast-growing communities like Bozeman and the Gallatin Valley, where HOA boards routinely review plans against community standards and local zoning requirements. Our Medium Site Plan at $119 includes the measurements, accessory structures, trees, and driveway detail that most Montana HOA review boards expect to see, and it is delivered within 24 hours so you can keep your project on schedule.

Q: Are MySitePlan drawings accepted by Montana building departments and HOAs?

Yes — MySitePlan has delivered more than 80,000 site plans nationwide, and our drawings are routinely accepted by Montana building departments and HOAs. Our plans are professionally drafted to meet the standard requirements of Montana permitting authorities: they show property lines, existing and proposed structures with labeled dimensions, setback distances, north arrow, and scale — which aligns directly with what the state DLI Building Codes Program and locally certified departments in Billings, Missoula, Bozeman, Helena, Great Falls, and Kalispell require. Missoula County's Land Use/Zoning Compliance Permit explicitly requires a detailed site plan showing property boundaries, all structures with uses and dimensions, and septic/well locations — all of which are included in our Detailed Site Plan tier. If your building department or HOA requests any changes after reviewing your plan, we provide revisions at no additional charge.

Q: What information do I need to provide to order a site plan for my Montana property?

To get started, you need your property address, basic project details, and any existing plat or survey documents you have on hand — that is typically all that is required. Our Drafterra Certified drafters use your address to pull GIS lot-line data and satellite imagery, which forms the basis of your drafted plan. If you have photos of the property, a copy of your recorded plat, or notes about the proposed project (such as the size and location of a new deck, fence line, or addition), including those will help ensure your plan reflects your project accurately. For projects in Missoula County, Flathead County, or Bozeman where specific setback distances or septic/well locations must be shown, providing any available documents about those features will speed up the drafting process.

Q: My property is outside city limits in Montana — do I still need a site plan?

Yes — properties outside incorporated city limits in Montana are typically served by the state's Building Codes Program (BC Program) through the Montana Department of Labor & Industry, and the state requires a site plan as part of every building permit application it processes. In Gallatin County, for example, the county itself does not issue building permits — projects outside Bozeman and Belgrade city limits go directly to the state DLI, and a compliant site plan must accompany the application. Flathead County similarly has no local building department, so state DLI handles building codes for unincorporated areas, while Flathead County's zoning administrator requires a full site plan submission before development in specified commercial and industrial zoning districts (BS, BR-4, HO, I-1H, and WV). MySitePlan serves rural and unincorporated properties across all of Montana — as long as your parcel has a valid address and is visible in GIS and satellite imagery, we can draft your plan and deliver it within 24 hours.

Q: Does MySitePlan serve properties in Wildland-Urban Interface (WUI) zones or near floodplains in Montana?

Yes — MySitePlan drafts site plans for properties in WUI zones and near floodplains throughout Montana, including in western Montana counties like Missoula, Flathead, and Gallatin where these conditions are common. Properties in Montana's Wildland-Urban Interface zones face additional permitting requirements for fire-resistant materials and defensible space, and a clear site plan showing structure locations, setbacks, and lot boundaries is an important part of that review process. Similarly, properties near streams, wetlands, or floodplains may require additional permits from the Montana Department of Natural Resources and Conservation (DNRC) — including floodplain development permits and Stream Protection Act permits — and your site plan will need to reflect applicable setbacks from waterways. Our Detailed Site Plan ($159) is the best starting point for these projects, as it includes the highest level of residential detail; if your jurisdiction or agency requires specific annotations or additional features, note that in your order and our drafters will incorporate your instructions.

Q: Why should I trust MySitePlan for my Montana project?

MySitePlan is a veteran-owned company with more than 10 years in business, 80,000+ site plans delivered nationwide, and 8,000+ verified five-star reviews. Every plan is produced by a Drafterra Certified drafter — meaning your plan is held to high standards of technical proficiency and drafted to meet the specific requirements of your jurisdiction, whether that is the Billings Planning and Community Services Department, Bozeman's ProjectDox portal, Missoula County's Land Use/Zoning Compliance Permit, or the Montana DLI Building Codes Program. Our plans are affordable (starting at $99), delivered within 24 hours, and backed by free revisions if your building department or HOA requests changes. There are no site visit fees, no scheduling delays, and no surprise costs — just a professionally drafted, permit-ready site plan when you need it.

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8,400+ 5-star reviews

80,000+ Successful Projects Delivered
100% Money Back Guarantee
Unlimited Revisions

GET YOUR SITE PLAN

The #1 site plan drafting service for contractors, homeowners and property managers.

No Site Visit Required*
Satellite & GIS-Based Measurements*
All Our Drafters Are Drafterra Certified*
Guaranteed Acceptance by Building Departments & HOAs*

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Medium Site Plan For A Pole Barn Permit Montana

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We value your satisfaction. We’ll make unlimited revisions to ensure your site plan gets accepted. However, you can also request your money back if you haven’t required a stamped, signed or sealed plan.

Additional Features For Site Plans in Montana

Do you need more granular site plans or need a faster turnaround? Simply add optional features to your order during the checkout process.

Unsure Which Site Plan is Right for Your Montana Commercial Property

At MySitePlan, our expert drafters understand Montana’s permitting landscape and offer a full range of services, including detailed floor plans, elevation drawings, 3D renderings, and comprehensive site plans. Whether you're developing a residential homestead, a commercial facility, or a tourism-based project, we provide expert documentation tailored to Montana’s regulatory requirements.

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At MySitePlan.com, we've helped thousands of satisfied customers in Montana get their site plans online.

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MySitePlan was upfront with their processes, and they followed through everything in a very professional manner.

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Getting Your Site Plan Approved in Montana

Montana’s vast landscapes, from the Rocky Mountains to the Great Plains, require a specialized approach to site planning and permitting. MySitePlan is the perfect solution for developers across the state, offering high-quality, regulation-ready site plans that align with Montana’s zoning, environmental, and land-use requirements. Whether you're working on a commercial project in Billings, a ranch expansion in the rural countryside, or a mountain retreat near Bozeman, our platform simplifies the permitting process, ensuring compliance with state and local regulations.

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Site Plans approved in every county in every state

Why Choose MySitePlan for Montana Site Plans

Whether you need a site plan for a building permit, fencing permit, deck permit, or HOA submission anywhere in Montana — from Billings and Missoula to Bozeman, Kalispell, and Great Falls — MySitePlan delivers professionally drafted, permit-ready plans in 24 hours, starting at just $99.

24-hour turnaround on every order — no site visit, no scheduling.
Transparent flat-rate pricing starting at $99 — no surveyor cost, no hidden fees.
Veteran-owned, with 80,000+ site plans delivered and 8,000+ verified five-star reviews.
Drafted remotely by Drafterra Certified drafters using GIS lot-line data and satellite imagery.
Trusted by Montana homeowners, contractors, and property managers for permit and HOA submissions.

Our site plans are not a survey, nor are they intended to replace one.

Montana's Building Permit Landscape: What You Need to Know

Last reviewed: April 2026

Montana runs a dual-track permitting system — and knowing which track applies to your project matters before you break ground. The state's Building Codes Program, part of the Department of Labor & Industry's Business Standards Division, serves as the authority for all areas without a locally certified building department. Cities like Billings, Missoula, Bozeman, Helena, Kalispell, Great Falls, and Butte each operate certified programs with their own site plan requirements and submission formats.

In Billings, site plans must show all structures, decks, driveways, property lines, watercourses, and setbacks — required for zoning compliance permits and separately for fence permits covering fences between 4 and 8 feet tall. Bozeman runs plan review through an electronic ProjectDox portal, and every detached structure requires its own permit. Missoula County requires site plans to label structure uses and dimensions, note septic and well locations, and show distances to all property lines.

Gallatin County does not issue building permits — Bozeman and Belgrade handle their own, while projects outside those cities go through the state DLI. Flathead County also lacks its own building department but requires a full site plan submission to the zoning administrator before development in designated commercial and industrial zones. Always confirm which jurisdiction controls your parcel before you begin.

Common Montana Projects That Require a Site Plan

Montana homeowners and contractors most often need a site plan for these project types:

Room additions and residential remodels — required by all certified local building departments statewide, including Billings, Missoula, and Bozeman.
Detached garage and accessory structure permits — each detached structure typically requires its own permit; setback and zoning requirements apply in Missoula, Bozeman, and most certified jurisdictions.
Fence permits — Billings requires a permit for fences between 4 and 8 feet tall; most Montana cities regulate fence height, setbacks, and materials by zoning district.
Deck and porch permits — required for structures more than 30 inches above finished grade; Bozeman and Gallatin Valley communities require engineering for 60–100+ lbs/sq ft snow loads.
Demolition permits — required in Billings, Missoula, Bozeman, and most certified jurisdictions before removing any primary structure.
New home construction — required under locally certified departments in Billings, Missoula, Bozeman, Helena, and Great Falls; state DLI handles rural parcels outside certified jurisdictions.
Shed and accessory structure permits — required above local size thresholds; Missoula enforces setback requirements for all sheds exceeding its exemption threshold.
HOA architectural review submissions — HOA boards and Architectural Control Committees across Montana's fast-growing communities (especially Bozeman) require a site plan to verify setbacks, property boundaries, and proposed improvements.
Zoning compliance and land use permits — Missoula County's Land Use/Zoning Compliance Permit requires a detailed site plan showing all structures, labeled uses, dimensions, and utility locations.
Floodplain development permits — properties near streams, wetlands, or FEMA-mapped floodplains require additional permits from Montana DNRC; site plans must reflect applicable waterway setbacks.
Driveway permits — required in many Montana municipalities and counties when adding or modifying access to a public road.
Retaining wall permits — required in many jurisdictions above specified height thresholds; frost depths of 36–48 inches make footing documentation critical in Montana.
Commercial site development plan review — Flathead County requires full site plan submission in BS, BR-4, HO, I-1H, and WV zoning districts; Billings requires commercial plans stamped by a Montana-licensed architect or engineer. MySitePlan provides residential site plans — confirm commercial stamping requirements with your local jurisdiction before ordering.
Sign permits — commercial and multi-tenant properties in Montana may require a site plan showing sign placement, setbacks, and dimensions.

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Montana's Unique Permitting Environment

Montana is one of a handful of states where the permitting authority genuinely shifts based on your location — not just your project type. Outside certified city and county programs, the state DLI Building Codes Program steps in as the issuing authority, with its own site plan checklist: property lines, all existing and proposed structures, dimensions, setback distances, north arrow, and drawn-to-scale notation are all required. Montana is also planning to adopt the 2024 ICC family of codes in mid-2026, which may affect requirements for projects currently in the pipeline.

Beyond standard permits, several Montana-specific conditions add layers of review. Properties in Wildland-Urban Interface (WUI) zones — common in Missoula, Flathead, and Gallatin counties — face site-specific review for defensible space and fire-resistant materials. Parcels near streams, wetlands, or floodplains require additional Montana DNRC permits, and site plans must accurately reflect waterway setbacks. Understanding these environmental overlays early can save significant time during plan review — a helpful starting point is understanding the risks of unpermitted work before you begin any project.

How MySitePlan Works for Montana Property Owners

Ordering is simple: provide your property address and project details, and a Drafterra Certified drafter produces your plan remotely — no scheduling, no site visit. Plans are delivered within 24 hours and are formatted to meet the site plan requirements of Montana building departments and HOA review boards.

Basic Site Plan — $99: Property lines, primary structure roofline, lot dimensions, north arrow, and scale.
Medium Site Plan — $119 (most popular): Adds measurements between features, trees, driveway, accessory structures, and swimming pool. Ideal for most Montana building permit and HOA applications.
Detailed Site Plan — $159: Adds paths, shrubs, landscaping, septic/utilities — ideal for Missoula County land use permits and floodplain submissions.
Commercial Site Plan — $179/$279: Includes parking, ingress/egress, dumpster areas, and parking space counts.
Commercial "The Works" — $279: Adds legal setbacks, custom size, DWG file, topography, impervious surface calculation, and vicinity map.

24-Hour Turnaround on Every Montana Order

Order online, provide your property address, and receive your professionally drafted plan within 24 hours — no scheduling, no site visit, no waiting.

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Trusted Across Montana — and Nationwide

MySitePlan has delivered more than 80,000 site plans accepted by building departments and HOA review boards across the country — including projects in Montana's fastest-growing cities like Bozeman, Missoula, Billings, and Kalispell. As a veteran-owned company with 8,000+ verified five-star reviews and Drafterra Certified drafters on every order, MySitePlan brings a level of consistency and professionalism that permit offices and HOA boards recognize.

From a straightforward fence permit in Billings to a detailed land use compliance submission in Missoula County, Montana property owners and contractors rely on MySitePlan to get the documentation they need — fast, affordable, and without the hassle of scheduling a site visit.

Montana counties served
County	Permit Authority	Site Plan Notes
Yellowstone County	City of Billings Building Division (city limits); Montana DLI Building Codes Program (unincorporated areas)	Billings requires site plans for new construction, additions, accessory structures, decks over 30 inches, and fences 4–8 feet tall. Plans must show property lines, building footprints, and all setback distances. Commercial submittals must bear a Montana-licensed architect or engineer stamp.
Missoula County	City of Missoula Building Division (city limits); Missoula County Planning & Development (unincorporated)	Missoula County explicitly requires a detailed site plan showing property boundaries, all structures with dimensions, septic system and well locations, and distances to property lines for both building permits and land use/zoning compliance permits. City of Missoula regulates fence heights and setbacks by zoning district.
Gallatin County	City of Bozeman Building Division (Bozeman city limits); City of Belgrade Building Dept. (Belgrade city limits); Montana DLI Building Codes Program (unincorporated Gallatin County)	Gallatin County does not issue building permits — projects outside Bozeman and Belgrade go directly to the Montana State Building Department (DLI). Bozeman is one of the fastest-growing cities in the Mountain West; site plans are required for all permits and must account for snow loads of 60–100+ lbs per square foot and frost depths of 36–48 inches. HOA architectural review submissions are extremely common throughout the county.
Cascade County	City of Great Falls Building Division (city limits); Montana DLI Building Codes Program (unincorporated areas)	Great Falls operates a certified local building department; site plans are required for new construction, additions, and accessory structures. Unincorporated Cascade County projects are permitted through the Montana DLI. Frost depths and wind exposure on the High Plains make accurate setback and footing documentation especially important.
Lewis & Clark County	City of Helena Building Division (city limits); Montana DLI Building Codes Program (unincorporated areas)	Helena, the state capital, has its own certified building department requiring site plans for new construction, additions, decks, and accessory structures. Unincorporated Lewis & Clark County falls under state DLI jurisdiction. Properties near the Prickly Pear floodplain may also require floodplain development permits with site documentation.
Flathead County	Flathead County Zoning Administrator (zoning districts); Montana DLI Building Codes Program (building permits county-wide); City of Kalispell Building Dept. (city limits)	Flathead County has no county building department — building permits are issued by the Montana DLI statewide. However, the county requires a complete site plan submitted to the Zoning Administrator prior to any site development in specified commercial and industrial zoning districts (BS, BR-4, HO, I-1H, WV). Wildland-Urban Interface (WUI) fire regulations apply to many areas; defensible space documentation may be required alongside a site plan.
Silver Bow County	Butte-Silver Bow Building Division	Butte-Silver Bow is a consolidated city-county government. The Building Division requires site plans for new construction, additions, and accessory structures. Historic mining heritage means some parcels carry Superfund-related environmental overlay considerations; verify any additional site documentation requirements with the local planning office.
Ravalli County	City of Hamilton Building Dept. (city limits); Montana DLI Building Codes Program (unincorporated areas)	Ravalli County is a rapidly growing area in the Bitterroot Valley. Unincorporated areas are served by the Montana DLI for building permits. Site plans should include septic and well locations, as properties are frequently on private water and sewer systems. WUI fire zone designations are common throughout the valley.
Fergus County	Montana DLI Building Codes Program (unincorporated areas); City of Lewistown Building Dept. (city limits)	Lewistown is the county seat and trade center of central Montana. Unincorporated Fergus County projects are permitted through the Montana DLI. Site plans are required showing property lines, structure locations, and setback distances for all permitted projects.
Lake County	Montana DLI Building Codes Program (unincorporated areas); City of Polson Building Dept. (city limits)	Lake County encompasses Flathead Lake and the Flathead Indian Reservation. Projects near the lake may require floodplain development permits in addition to standard building permits. Site plans must document setbacks from property lines and any shoreline buffer distances required by local ordinance.
Hill County	Montana DLI Building Codes Program (unincorporated areas); City of Havre Building Dept. (city limits)	Havre is the county seat and the largest city on the Hi-Line. Unincorporated Hill County projects go through the Montana DLI. Cold climate and wind exposure make accurate footing and setback documentation on site plans critical for permit approval.
Richland County	Montana DLI Building Codes Program (unincorporated areas); City of Sidney Building Dept. (city limits)	Sidney, in the Bakken oil region of eastern Montana, has seen periods of rapid construction activity. Site plans are required for all permitted structures showing property lines, building locations, and setbacks. Verify current local ordinance requirements with the City of Sidney for projects within city limits.
Roosevelt County	Montana DLI Building Codes Program (unincorporated areas); City of Wolf Point Building Dept. (city limits)	Roosevelt County is located in northeastern Montana along the Missouri River. Unincorporated projects are permitted through the Montana DLI. Site plans should reflect property lines, all existing structures, and distances to adjacent buildings and lot lines.
Custer County	Montana DLI Building Codes Program (unincorporated areas); City of Miles City Building Dept. (city limits)	Miles City serves as the commercial hub of southeastern Montana. Site plans required for new construction and additions must show property boundaries, building footprints, and setback distances. Unincorporated Custer County projects are administered by the Montana DLI.
Dawson County	Montana DLI Building Codes Program (unincorporated areas); City of Glendive Building Dept. (city limits)	Glendive is the county seat and serves the agricultural and energy sectors of Dawson County. Site plans for permitted projects must document property lines, building locations, and all setback distances. Unincorporated areas are served by the Montana DLI.
Glacier County	Montana DLI Building Codes Program (unincorporated areas); City of Cut Bank Building Dept. (city limits)	Glacier County borders Glacier National Park and Canada. WUI fire zone and floodplain considerations apply to many parcels. Site plans must show all structures, property lines, and distances to lot lines; septic and well locations should be included for rural properties.
Pondera County	Montana DLI Building Codes Program (unincorporated areas); City of Conrad Building Dept. (city limits)	Conrad is the county seat of this north-central Montana agricultural county. Unincorporated projects are handled by the Montana DLI. Site plans are required for all permitted construction showing property lines, structure footprints, and setback distances.
Toole County	Montana DLI Building Codes Program (unincorporated areas); City of Shelby Building Dept. (city limits)	Shelby, near the Canadian border, is the county seat of Toole County. High winds and cold temperatures on the northern plains make proper footing and setback documentation essential. Unincorporated county projects are permitted through the Montana DLI.
Teton County	Montana DLI Building Codes Program (unincorporated areas); City of Choteau Building Dept. (city limits)	Teton County sits at the eastern edge of the Rocky Mountain Front. Unincorporated projects are handled by the Montana DLI. Site plans should document all structures, property lines, and setbacks; properties near the Front may also be subject to WUI fire zone requirements.
Meagher County	Montana DLI Building Codes Program	White Sulphur Springs is the county seat of this sparsely populated central Montana county. All building permits are administered through the Montana DLI. Site plans must show property lines, building locations, and setback distances from all lot lines.
Judith Basin County	Montana DLI Building Codes Program	Stanford is the county seat of one of Montana's least-populated counties. All permitted construction is administered through the Montana DLI. Site plans are required showing property boundaries, structure footprints, and distances to property lines.
Blaine County	Montana DLI Building Codes Program	Chinook is the county seat of Blaine County in north-central Montana. Unincorporated projects are permitted through the Montana DLI. Site plans must document property lines, building footprints, and setback distances; rural properties should include well and septic locations.
Phillips County	Montana DLI Building Codes Program	Malta is the county seat of this large, rural Hi-Line county. All building permits are issued through the Montana DLI. Site plans are required for new construction and additions, showing property lines, building locations, and all setback distances.
Valley County	Montana DLI Building Codes Program; City of Glasgow Building Dept. (city limits)	Glasgow is the county seat and serves the northeastern Montana agricultural region. City of Glasgow projects require site plans for permitted work; unincorporated Valley County projects go through the Montana DLI. Properties near the Milk River may be subject to floodplain development requirements.
McCone County	Montana DLI Building Codes Program	Circle is the county seat of this rural eastern Montana county. All building permits are administered through the Montana DLI. Site plans must show property lines, structure locations, and setback distances from lot lines for all permitted construction.
Garfield County	Montana DLI Building Codes Program	Jordan is the remote county seat of Garfield County in eastern Montana. All building permits are issued through the Montana DLI. Site plans are required for all permitted structures and should include property lines, building footprints, and distances to lot lines.
Prairie County	Montana DLI Building Codes Program	Terry is the county seat of Prairie County in southeastern Montana. All building permits are administered through the Montana DLI. Site plans must document property lines, all existing and proposed structures, and required setback distances.
Wibaux County	Montana DLI Building Codes Program	Wibaux is Montana's smallest county by population, bordering North Dakota. All building permits are issued through the Montana DLI. Site plans are required for permitted construction showing property boundaries, structure footprints, and setback distances.
Carter County	Montana DLI Building Codes Program	Ekalaka is the remote county seat of Carter County in the far southeastern corner of Montana. All building permits are handled through the Montana DLI. Site plans must show property lines, building locations, and all setback distances for permitted projects.
Powder River County	Montana DLI Building Codes Program	Broadus is the county seat of Powder River County, known for ranching and energy production. All building permits are administered by the Montana DLI. Site plans for permitted construction must document property lines, structure footprints, and required setback distances.
Big Horn County	Montana DLI Building Codes Program; City of Hardin Building Dept. (city limits)	Hardin is the county seat and serves southern Montana near the Wyoming border. City of Hardin projects require site plans showing property lines, building footprints, and setbacks. Unincorporated Big Horn County projects are permitted through the Montana DLI. Some parcels near the Bighorn River may require floodplain documentation.
Carbon County	Montana DLI Building Codes Program; City of Red Lodge Building Dept. (city limits)	Red Lodge, a gateway community to the Beartooth Highway, sits in a high-elevation mountain environment. Snow loads in Carbon County can exceed 100 lbs per square foot in upper elevations, making accurate site plan documentation of footings and setbacks critical. WUI fire zone regulations apply to many foothill and mountain properties.
Stillwater County	Montana DLI Building Codes Program; City of Columbus Building Dept. (city limits)	Columbus is the county seat of Stillwater County, south of Billings. Unincorporated projects are handled through the Montana DLI. Site plans must show property lines, all structures, and setback distances; rural properties on private water and sewer should include well and septic locations.
Sweet Grass County	Montana DLI Building Codes Program; City of Big Timber Building Dept. (city limits)	Big Timber is the county seat of Sweet Grass County at the northern edge of the Absaroka Range. Unincorporated county projects are permitted through the Montana DLI. Site plans should document property boundaries, building footprints, and setback distances; high wind and snow load conditions apply in elevated areas.
Park County	Montana DLI Building Codes Program; City of Livingston Building Dept. (city limits)	Livingston serves as the northern gateway to Yellowstone National Park. Park County has significant WUI fire zone coverage in its foothill and mountain areas. Site plans must document setbacks, structure locations, and property lines; snow loads and frost depths in higher elevations require careful footing documentation.
Jefferson County	Montana DLI Building Codes Program; City of Boulder Building Dept. (city limits)	Jefferson County sits between Butte and Helena and has seen growth as a bedroom community for both cities. Unincorporated projects go through the Montana DLI. Site plans are required showing property lines, all existing and proposed structures, and setback distances from lot lines.
Broadwater County	Montana DLI Building Codes Program; City of Townsend Building Dept. (city limits)	Townsend is the county seat of Broadwater County on Canyon Ferry Lake. Properties near Canyon Ferry and the Missouri River may be subject to floodplain development permit requirements in addition to standard building permits. Site plans should document all structures, property lines, and any shoreline setbacks.
Powell County	Montana DLI Building Codes Program; City of Deer Lodge Building Dept. (city limits)	Deer Lodge is the county seat of Powell County in the upper Clark Fork Valley. Unincorporated projects are administered through the Montana DLI. Site plans must show property boundaries, building footprints, setback distances, and well and septic locations for rural properties.
Granite County	Montana DLI Building Codes Program	Philipsburg is the county seat of Granite County in the Flint Creek Valley. All building permits are administered through the Montana DLI. Site plans are required for all permitted construction and should include property lines, structure locations, and setback distances. High-elevation snow loads apply in mountain areas.
Deer Lodge County	Anaconda-Deer Lodge County Building Division	Anaconda-Deer Lodge County is a consolidated city-county government, similar to Butte-Silver Bow. The Building Division requires site plans for new construction, additions, and accessory structures. Some parcels carry environmental overlay considerations related to historic Anaconda Smelter Superfund designations; verify additional documentation requirements with the local planning office.
Madison County	Montana DLI Building Codes Program; Town of Virginia City (city limits)	Madison County encompasses the historic gold rush town of Virginia City and the resort community of Ennis. Unincorporated projects go through the Montana DLI. Site plans must document property lines, structure footprints, and setback distances; historic district properties in Virginia City may face additional architectural review requirements.
Beaverhead County	Montana DLI Building Codes Program; City of Dillon Building Dept. (city limits)	Dillon is the county seat of Montana's largest county by area. Beaverhead County is primarily agricultural and ranch land. Unincorporated projects are administered through the Montana DLI. Note that state law exempts farm and ranch buildings from state building permit requirements, but permitted residential and commercial construction still requires a site plan.
Lincoln County	Montana DLI Building Codes Program; City of Libby Building Dept. (city limits)	Libby is the county seat of Lincoln County in the remote northwest corner of Montana. Unincorporated projects are administered through the Montana DLI. WUI fire zone and floodplain designations are common in the Kootenai River corridor and surrounding mountains; site plans should document all structures, property lines, and setback distances.
Sanders County	Montana DLI Building Codes Program; City of Thompson Falls Building Dept. (city limits)	Thompson Falls is the county seat of Sanders County along the Clark Fork River. Unincorporated projects go through the Montana DLI. Properties near the Clark Fork and its tributaries may require floodplain development permits. Site plans should include property lines, all structures, setback distances, and well and septic locations for rural parcels.
Mineral County	Montana DLI Building Codes Program; City of Superior Building Dept. (city limits)	Superior is the county seat of Mineral County along I-90 in western Montana. All unincorporated projects are permitted through the Montana DLI. High precipitation, steep terrain, and floodplain and WUI considerations make comprehensive site plan documentation important for permit approval in this mountainous county.

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