Bolthole Index

Carbon County, Wyoming

Building permits, zoning and land rules in Carbon County, Wyoming

57Index Score / 100
#12 of 23 in Wyoming

Unincorporated Carbon County, Wyoming requires a Building Permit and Zoning Certificate before construction starts on a new building or structure1. Carbon County Planning & Development administers county zoning and subdivision rules23. Wyoming DEQ, not the county, permits septic systems4. Saratoga, Baggs and Sinclair issue their own building permits and set their own zoning inside town limits5678910.

At a glance

Building permit
Required for new buildings and structures in unincorporated Carbon County1
Zoning
County zoning resolution applies in unincorporated areas; Saratoga, Hanna, Baggs and Sinclair zone their own land211612810
Septic permits
Wyoming DEQ is the permitting authority for small wastewater systems in Carbon County4
RV / tiny home living
Not confirmed; ask Carbon County Planning & Development before relying on either use13
Owner-builder exemption
An owner may act as general contractor on a primary residence, but county permits still apply141
Well permit
An approved state permit is required before drilling a groundwater well15
Legal access
The building application requires proof of valid, legal and usable access from a public road16
Septic soil difficulty
Only 28.7% of county soils are rated not limited for a conventional drain field17

Who to call

Building permits

Carbon County Planning & Development

Building permits, zoning, subdivision standards and rural addresses in unincorporated Carbon County

307-328-2651

215 West Buffalo Street, Suite 317, Rawlins, WY 82301

Septic permits

Wyoming Department of Environmental Quality, Water Quality Division

Permits to construct small wastewater facilities in Carbon County

Contact details are copied from each office’s official page and were checked against it on October 15, 2026.

Off-grid gear

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

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Do you need a building permit in Carbon County, Wyoming?

Yes. Unincorporated Carbon County requires a Building Permit and Zoning Certificate before construction begins on a new building or structure1. Pole barns, shops and garages are examples of structures that need permits18. The listed exceptions are canals, dams, ditches, fences under 8 feet tall and agriculture-related water tanks, although fences in Commercial or Industrial zones still require a building permit1920. The water-tank exception is not a blanket exemption for agricultural buildings20. Unlike most counties around it in Wyoming, Carbon County requires a county building permit21. We could not confirm the adopted county building-code edition, inspection stages or a separate certificate-of-occupancy requirement; ask Planning & Development about those items for the specific project22. A building people will live or work in also needs a sewage-disposal method and water supply that meet Wyoming DEQ Water Quality Division standards, or a private well permitted by the State Engineer23.

Who issues building permits in Carbon County, and how do you reach them?

Carbon County Planning & Development handles building permits, zoning and subdivision review for unincorporated land at 215 West Buffalo Street, Suite 317, Rawlins, WY 82301; call 307-328-265122. The building application requires proof of ownership, a site plan, the fee, proof of legal and usable access, and sanitation and water-supply documentation when applicable24. The department then reviews the application for compliance with county zoning and subdivision standards25. The published fee schedule, effective August 2, 2022, lists building application fees of $25–$950 by improvement value and a 0.001 multiplier for improvements valued at $1,000,001 or more; confirm the charge with Planning & Development26. Application fees are due at submission and are nonrefundable, and newspapers bill public-notice charges separately26.

The county's rules apply to unincorporated land. Inside Saratoga, applicants go to the town building inspector5; inside Sinclair, the Town Clerk-Treasurer issues building permits in consultation with the town building inspector9; inside Baggs, the town requires a building permit for construction7. Septic permits stay with Wyoming DEQ even inside town limits274.

Does Carbon County have zoning?

Carbon County Planning & Development administers the county Zoning Resolution and map for unincorporated Carbon County228. The county publishes the Carbon County Zoning Resolution of 2015, amended in 2020, and its map; district names and dimensional standards are in that document1129. Its planning page also lists referral-boundary memoranda for several incorporated towns, so ask Planning & Development whether a parcel near a town falls under county or town zoning11. Inside Saratoga, Hanna, Baggs and Sinclair, the town sets its own zoning612810.

County subdivision regulations govern land divisions in unincorporated Carbon County3. For lots created by subdivision, the minimum lot size is 1 acre with central water or central sewer but not both, and 5 acres with individual water and sewage-disposal systems; lot shape or percolation tests may require more area30. DEQ reviews subdivisions with more than 5 parcels and may review smaller proposals the county refers31. We could not confirm parcel-specific setbacks, lot coverage, height limits or minimum dwelling size; ask Planning & Development for the parcel's district standards22.

How do septic permits work in Carbon County?

Wyoming DEQ is the permitting authority for small wastewater facilities in Carbon County, and the county itself does not issue septic permits4. Septic authorization covers installation, repair or replacement of individual or commercial sewage-disposal systems treating less than 2,000 gallons of domestic sewage per day32. Complete the Conventional Septic System Application, send a hard copy of the application package and leachfield design sheets to the DEQ District Engineer for Carbon County, and send an electronic copy to DEQ33. Construction may not start until DEQ issues a permit to construct or notice of coverage32. Submit a Certificate of Completion after installation and a Transfer of Ownership form when a permitted facility changes hands34. Only 28.7% of Carbon County soils are rated not limited for a conventional drain field, a strict rating, so expect a site evaluation and possibly an engineered system before budgeting17.

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

We could not confirm whether unincorporated Carbon County allows residential RV occupancy, temporary camping while building, or tiny-home occupancy; ask Carbon County Planning & Development about the proposed use and parcel22. Wyoming law gives counties authority over land occupancy in unincorporated areas, and Carbon County administers zoning there3536. Ask Planning & Development which district allows the proposed use and whether temporary-use approval is needed22. A tiny home placed as a new building or structure needs the county building-permit and zoning-certificate question resolved before installation1. Incinerating or composting toilets may require Wyoming DEQ authorization; ask DEQ about the proposed sanitation system rather than assuming off-grid equipment avoids wastewater review37.

Building a home in Carbon County: the steps, in order

  1. Confirm that the parcel is in unincorporated Carbon County, then ask Planning & Development for its zoning district and applicable standards2922.
  1. Assemble proof of ownership, a site plan, the applicable fee, sanitation and water-supply documentation, and proof of valid, legal and usable access; include the legal-access easement and other easements if the parcel is not next to a public road242638.
  1. Apply for the Building Permit and Zoning Certificate and wait for both before construction starts1. Inside Saratoga, Baggs or Sinclair, apply to the town instead579. An owner may act as general contractor on a primary residence, but local approvals still apply14.
  1. Apply to Wyoming DEQ for small-wastewater authorization, wait before installation and submit the Certificate of Completion afterward34.
  1. Obtain the State Engineer's approved permit before drilling a well and use the required licensed contractors39.
  1. If the tract was divided, confirm that it met county and state subdivision requirements or qualified for an exemption3140.

What should you check before buying land in Carbon County?

Check legal access first: the building application requires proof of valid, legal and usable access from a public road, plus easement documents when the property is not road-adjacent38. Check water and septic feasibility together; Carbon County averages 15.6 inches of precipitation a year, and only 28.7% of its soils lack severe limits for a conventional drain field4117. A groundwater well requires an approved state permit before drilling, and a typical domestic or stock application carries a $50 filing fee15. For floodplain development, Carbon County's application asks for flood-zone, elevation and flood-proofing information; projects over 50 lots or 5 acres require base 100-year flood-elevation data42. Parcels of 35 acres or larger generally fall outside the state subdivision act, but each still needs binding, recordable easements at least 40 feet wide to a public road unless the buyer waives them43. Federal land covers 52.5% of the county, so verify practical access and neighboring ownership44. The effective property-tax rate is about 0.6%, the median annual property-tax bill is about $1,2024546.

Watch-outs

  • We could not confirm RV or tiny-home occupancy rules in unincorporated Carbon County; ask Planning & Development about the parcel and proposed use before buying or moving onsite22.
  • A Wyoming owner may act as general contractor on a primary residence, but owner-builder status does not remove Carbon County's building-permit requirement141.
  • The confirmed agricultural exception covers agriculture-related water tanks, not every agricultural building47.
  • A building application needs proof of legal and usable road access, including easement documents when the parcel is not adjacent to a public road16.
  • Hanna sets its own zoning, so a parcel inside Hanna follows town zoning rather than the county resolution; we could not confirm who issues building permits there, so call the town12.

Sources

  1. Planning and Development | Carbon County, WY, quoted and re-checked
  2. Planning and Development | Carbon County, WY, quoted and re-checked
  3. Planning and Development | Carbon County, WY, quoted and re-checked
  4. Small Wastewater Systems, quoted and re-checked
  5. Town of Saratoga: Chapter 15.04 Building Code (Carbon County), quoted and re-checked
  6. Town of Saratoga: Town of Saratoga, WY Code of Ordinances (Carbon County), quoted and re-checked
  7. Town of Baggs: 17.08.130 - Building permit (Carbon County), quoted and re-checked
  8. Town of Baggs: 17.12.020 - District zoning map (Carbon County), quoted and re-checked
  9. Town of Sinclair: § 11-2-4 Building Permit Required (Carbon County), quoted and re-checked
  10. Town of Sinclair: Sinclair, Wyoming Code of Ordinances (Carbon County), quoted and re-checked
  11. Planning and Development, quoted and re-checked
  12. Town of Hanna: Town of Hanna Zoning Ordinance, §153.001 (Carbon County), quoted and re-checked
  13. Planning and Development (2026 county census)
  14. Startup Resources — Wyoming Business Council (Wyoming statewide rule), quoted and re-checked
  15. seo.wyo.gov (Wyoming statewide rule), quoted and re-checked
  16. Application for a Building Permit & Zoning Certificate, quoted and re-checked
  17. 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
  18. Planning and Development, quoted and re-checked
  19. Planning and Development | Carbon County, WY, quoted and re-checked
  20. carboncountywy.gov, quoted and re-checked
  21. Planning and Development | Carbon County, WY (2026 county census)
  22. Carbon County Planning & Development (carboncountywy.gov)
  23. Application for a Building Permit & Zoning Certificate, quoted and re-checked
  24. Application for a Building Permit & Zoning Certificate, quoted and re-checked
  25. Planning and Development | Carbon County, WY, quoted and re-checked
  26. Application for a Building Permit & Zoning Certificate, quoted and re-checked
  27. Town of Baggs: Small Wastewater Systems (Carbon County), quoted and re-checked
  28. Planning and Development | Carbon County, WY, quoted and re-checked
  29. Zoning Resolution and Map | Carbon County, WY, quoted and re-checked
  30. Carbon County Subdivision Regulations of 2023, quoted and re-checked
  31. Carbon County Subdivision Regulations of 2023, quoted and re-checked
  32. Small Wastewater Systems, quoted and re-checked
  33. Small Wastewater Systems - Wyoming Department of Environmental Quality, quoted and re-checked
  34. Small Wastewater Systems, quoted and re-checked
  35. Wyoming Statutes, Title 18, W.S. 18-5-201 (Wyoming statewide rule), quoted and re-checked
  36. Planning and Development | Carbon County, WY, quoted and re-checked
  37. deq.wyoming.gov (Wyoming statewide rule), quoted and re-checked
  38. Application for a Building Permit & Zoning Certificate, quoted and re-checked
  39. General Processes - Wyoming State Engineer's Office, quoted and re-checked
  40. Wyoming Statutes, Title 18 (Wyoming statewide rule), quoted and re-checked
  41. Annual precipitation: Bolthole Index county data
  42. Application for a Floodplain Development Permit, quoted and re-checked
  43. Wyoming Statutes, Title 18 (Wyoming statewide rule), quoted and re-checked
  44. Federal land share: Bolthole Index county data
  45. Effective property tax rate: Bolthole Index county data
  46. Median property tax bill: Bolthole Index county data
  47. Planning and Development | Carbon County, WY, quoted and re-checked

Written October 15, 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, Carbon County requires a building permit for a home.

RuleCarbon CountyAlbany CountyNatrona CountyPlatte CountyConverse CountySweetwater CountyLaramie County
Building permitRequiredLimitedRequiredLimitedNot requiredLimitedRequired
County zoningYesYesYesYesNoYesYes
Septic permitsWY DEQCounty Planning Dept.Casper-Natrona County Health Dept.WY DEQConverse CountyCounty Env. HealthCounty Div. of Env. Health

County locator

Carbon County in Wyoming

57
County map
Carbon County highlighted among the Wyoming counties · colored by Index score

How Carbon County scores

Seclusion86100% ev.
Self-Sufficiency2998% ev.
Admin Boringness4490% ev.
Durability45100% ev.
Property Autonomy74100% ev.
Carry Cost90100% 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 →

$216kTypical home
0.6%Property tax
$971Land / acre
15.6"Annual rain
16.6% of yrsSevere drought
0.3 / yr (+0.3)Mid-century 100°F days
21.3 daysMid-century dry spell
1.05" (+4.5%)Mid-century 1-day rain
1.25×Wildfire change factor
100%Forward climate coverage
$1,366Home insurance / yr
1.3% / yrInsurance growth
0.59%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
541Radius comparison (15 mi)
1.8People / sq mi
52.5%Federal land
73.2%Land at 15% slope or less
28.7%Soils rated "not limited" for septic (strict USDA rating)
875,661 acWorkable land screen
14.1%Wooded land
29.4 tonsBiomass / forest ac
41.9°FAvg temp

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Cities and towns in Carbon County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Town of Dixon · Town of Elk Mountain · Town of Encampment · Town of Medicine Bow · Rawlins · Town of Riverside

Answers from the rulebook for Carbon County

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

Carbon County rules

  • Building permitRequired

    Construction placing new buildings or structures on land in unincorporated Carbon County.

    • The county page states that pole barns, shops, and garages require permits.
    • Canals, dams, ditches, fences less than 8 feet tall, and agriculture-related water tanks are listed as not requiring a county building permit.
    • Fences in Commercial or Industrial zones require a building permit.
    • A Building Permit and Zoning Certificate must be issued before construction may commence.
    “This application is required to obtain a Building Permit and Zoning Certificate within unincorporated areas of Carbon County. Submission of this application does not constitute permission to proceed with development. A Building Permit and Zoning Certificate must be issued by the Planning and Zoning Department before construction may commence.”
    2 more reviewed findings on this topic
    • Required — Construction placing new buildings or structures on land in unincorporated Carbon County.
      “requires a building permit for all construction”
    • Required — Construction placing new buildings or structures on land in Carbon County.
      “Carbon County requires a building permit for all construction that places new buildings or structures on the land: Pole barns, shops and garages.”
  • County-wide zoningPresent (with conditions)

    Land-use regulation in unincorporated Carbon County.

    • The county administers the Carbon County Zoning Resolution and reviews development for compliance with county zoning standards.
    • Incorporated municipalities may administer their own local rules.
    “administration of various land use regulations”
    2 more reviewed findings on this topic
    • Present (with conditions) — County zoning regulation in unincorporated Carbon County.
      “The Planning and Development Department is primarily responsible for the administration of various land use regulations, including the Zoning Resolution and the Subdivision Regulations. The department also assigns rural addresses and responds to public nuisance complaints in unincorporated Carbon County.”
    • Present (with conditions) — Land-use regulation in unincorporated Carbon County.
      “The Planning and Development Department is primarily responsible for the administration of various land use regulations, including the Zoning Resolution and the Subdivision Regulations. The department also assigns rural addresses and responds to public nuisance complaints in unincorporated Carbon County.”
  • Local zoningPresent (with conditions)

    Local zoning administered by Carbon County in its unincorporated area.

    • The department's stated nuisance and rural-address jurisdiction is unincorporated Carbon County; this claim does not determine municipal zoning.
    “The Planning and Development Department is primarily responsible for the administration of various land use regulations, including the Zoning Resolution and the Subdivision Regulations.”
  • Zoning districtsPublished (with conditions)

    Zoning districts established by the Carbon County Zoning Resolution of 2015 and administered through Carbon County Planning and Development.

    • The county planning page identifies the Zoning Resolution as a county land-use regulation administered by the Planning and Development Department.
    • The county page links the Carbon County Zoning Resolution of 2015 as Exhibit 3.
    • The county page separately identifies referral boundary memoranda for several incorporated towns; incorporated municipalities may have separate or additional land-use rules.
    “Find the Carbon County Zoning Resolution of 2015 -Amended-July 7, 2020.”
    One more reviewed finding on this topic
  • Minimum lot sizeSpecified

    Lots created through subdivisions in the unincorporated areas of Carbon County.

    • The rule applies to subdivisions governed by the Carbon County Subdivision Regulations of 2023.
    • Where central water exists without central sewer, or central sewer exists without central water, the minimum lot size is one acre.
    • Where both individual water supply and individual sewage disposal systems are used, the minimum lot size is five acres.
    • Additional area may be required based on lot shape or soil percolation-test results.
    • The regulations state that they govern subdivision of land within unincorporated Carbon County.

    minimum lot size with one central utility and one noncentral utility: 1 acre (Additional area may be required based on lot shape or soil percolation tests.) · minimum lot size with individual water and sewage systems: 5 acres (Additional area may be required based on lot shape or soil percolation tests.)

    “For subdivisions where a central water system exists but no central sewer system is provided, or vice versa, the minimum lot size shall be one (1) acre. Additional area may be required if determined necessary by the shape of the land or from soil percolation tests. For subdivisions to be served by both individual water supply and sewage disposal systems, the minimum lot size shall be five (5) acres. Additional areas may be required of individual lots where necessary because of the shape of the land or results of soil percolation tests.”
  • Mandatory utility hookupConditional

    Buildings for human use or occupancy in unincorporated Carbon County.

    • A sewage-disposal method must meet DEQ/Water Quality Division standards and requirements.
    • A water supply must meet DEQ/Water Quality Division standards and requirements, or be a private well permitted by the State Engineer.
    • Single-family seasonal and recreational dwellings not used for rental or commercial use may use a cistern, tank, or hauled water for domestic use.
    “Building permits issued for the erection, alteration, or relocation of a building for human use or occupancy shall require the structure to be served by a sewage disposal method, which meets the standards and the requirements of the Department of Environmental Quality/Water Quality Division Rules and Regulations. [...] Building permits issued for the erection, alteration, or relocation of a building for human occupancy shall require the structure to be served by a water supply method which meets the standards and requirements of the Department of Environmental Quality/Water Quality Division Rules and Regulations, or a private well permitted by the State Engineer.”
  • Agricultural exemptionConditional

    Agriculture-related water tanks under Carbon County building-permit rules.

    • The exemption is limited to agriculture-related water tanks.
    • It does not establish a general agricultural exemption for all structures or activities.
    • Fences in Commercial or Industrial zones require a building permit.
    “All agriculture related water tanks do not require a building permit.”
    One more reviewed finding on this topic
    • Conditional — Agriculture-related water tanks in unincorporated Carbon County.
      “water tanks do not require a building permit.”
  • Subdividing landRegulated (with conditions)

    Subdivision of land in unincorporated Carbon County.

    • The regulations establish procedures for the Board of County Commissioners and Planning and Zoning Commission.
    • DEQ reviews subdivisions with more than five parcels and may review unique site conditions or other subdivisions referred by the County.
    • DEQ referral may not be necessary for a subdivision connecting to an existing state-approved water supply and sewage-treatment system with adequate capacity and written owner consent.

    DEQ review parcel threshold: > 5 parcels (Also applies to unique site conditions or other characteristics where the County chooses to refer to DEQ.)

    “This resolution shall establish rules, regulations and standards governing the subdivision of land within the unincorporated areas of Carbon County, and set forth the procedure to be followed by the Carbon County Board of County Commissioners (Board) and the Carbon County Planning and Zoning Commission (Commission) in applying and administering these rules, regulations and standards”
    2 more reviewed findings on this topic
    • Regulated (with conditions) — Subdivision and land-use proposals administered by Carbon County Planning and Development in unincorporated areas.
      “The Planning and Development Department is primarily responsible for the administration of various land use regulations, including the Zoning Resolution and the Subdivision Regulations.”
    • Regulated (with conditions) — Subdivision and land-use proposals administered by Carbon County Planning and Development.
      “The Planning and Development Department is primarily responsible for the administration of various land use regulations, including the Zoning Resolution and the Subdivision Regulations.”
  • Driveway accessRequired

    Access to property for county building-permit applications in unincorporated Carbon County.

    • The applicant must provide proof of valid, legal, and usable access from a public highway, road, or street.
    • If the property is not adjacent to a public road, the application must include the easement granting legal access and other easements on or serving the property.
    “The applicant shall provide proof of valid, legal and useable access to the property from a public highway, road or street. If the property is not adjacent to a public road, include a copy of the easement granting legal access to the property and any other easements on or serving the subject property.”
    One more reviewed finding on this topic
  • Building in a floodplainLimited

    Development proposed in floodplain areas addressed by Carbon County's floodplain-development permit application.

    • The official county form is an application form and does not itself establish the full operative ordinance.
    • The form requests flood-zone, FEMA map, elevation, flood-proofing, watercourse-alteration, and flood-elevation information where applicable.
    • For a development or subdivision greater than 50 lots or 5 acres, base 100-year flood elevation data is required.

    development or subdivision threshold for base flood elevation data: > 50 lots (or more than 5 acres)

    “Base (100-year) flood elevation data for a development or subdivision greater than 50 lots or 5 acres.”
  • Permit feesPublished (with conditions)

    Carbon County planning, zoning, subdivision, and building-permit applications.

    • Application and subdivision permit fees must be paid when the application is submitted and are not refundable.
    • Public notice charges are billed directly by newspapers.
    • The schedule states an effective date of August 2, 2022.

    building permit application fee for improvements: $25.00-$950.00 or 0.001 multiplier USD (Varies by improvement value; $1,000,001 and over uses a 0.001 multiplier.)

    “Please make checks payable to Carbon County Planning. Application Fee and Subdivision Permit Fees must be paid at the time the application is submitted and is not refundable. [...] Effective Date: August 2, 2022”
    One more reviewed finding on this topic
    • Published (with conditions) — Carbon County Planning and Development fees.
      “View, download, or print the 2022 Carbon County Fee Schedule . Fees are effective August 2, 2022.”
  • Permit processPartial

    Carbon County building permit applications for construction placing new buildings or structures on land.

    • The county page states that pole barns, shops, and garages are examples of structures requiring a building permit.
    • The Planning and Development Department reviews the building permit application for compliance with county zoning and subdivision standards.
    • The page lists exceptions including canals, dams, ditches, fences less than 8 feet tall, and agriculture-related water tanks; fences in commercial or industrial zones require a permit.
    • The page does not provide a complete application-submission, inspection, or issuance workflow.
    “Carbon County requires a building permit for all construction that places new buildings or structures on the land”
    2 more reviewed findings on this topic
    • Published (with conditions) — Building-permit applications for development in unincorporated Carbon County.
      “Please attach the following to this application:”
    • Partial — County building-permit review for construction in unincorporated Carbon County.
      “The Planning and Development Department will review the building permit application to determine compliance with County zoning and subdivision standards.”

Wyoming rules that apply here

  • Owner-builder exemptionConditional

    Owner-builder construction subject to Wyoming fire, building, existing-building, or electrical safety enforcement.

    • Municipalities and counties may apply for delegated enforcement authority.
    • Before initial delegation, the local governing body must adopt minimum standards equivalent to or more stringent than applicable state standards.
    • If the local jurisdiction fails to maintain required standards or certified inspectors, enforcement authority may revert to the state department.
    • The statute does not itself create a statewide owner-builder exemption from local licensing or permitting.
    “The state fire marshal shall delegate complete authority to municipalities and counties which apply”
    2 more reviewed findings on this topic
    • Available — An owner acting as the general contractor or performing ordinary construction work on the owner's primary residence in Wyoming.
      “Contractor licensing (except electrical) is not done by the state of Wyoming. Rather, the option to license contractors is deferred to the local jurisdiction where the construction activity is to take place.”
    • Conditional — An owner acting as the general contractor for residential construction in Wyoming.
      “Rather, the option to license contractors is deferred to the local jurisdiction where the construction activity is to take place.”
  • Building code adoptedAdopted (with conditions)

    The Wyoming Department of Fire Prevention and Electrical Safety's statewide adoption and administration of the 2024 International Building Code, including state fire-marshal plan review under the statutory categories in W.S. 35-9-108(a).

    • The 2024 International Building Code was adopted as part of Wyoming's 2024 International Codes on June 28, 2024.
    • The state fire-marshal plan-review requirement applies to state or local government-owned or leased buildings; public buildings over 5,000 square feet including basement; multistory public buildings; child-care centers housing more than 10 children; specified public assembly, hospitality, and entertainment uses regardless of size; and public or private aboveground fuel-dispensing facilities.
    • The statutory plan-review provision is subject to W.S. 35-9-108(h) and (q) and W.S. 35-9-118.
    • W.S. 35-9-108(h) excludes municipalities or counties that have received enforcement authority for fire-safety standards under W.S. 35-9-121.
    • Under W.S. 35-9-108(q), plan review is not required for remodeling exempt from permitting under the International Code; remodeling under $40,000 affecting a built-in fire-protection system requires review with a fee of no more than $50 per hour; remodeling costing $40,000 or more requires review and fees under W.S. 35-9-108(d); and submission to the state fire marshal is not required when review is submitted to a local governmental entity with sole plan-review authority under W.S. 35-9-121(b).
    • W.S. 35-9-118 excludes farms or ranches of 40 acres or more on deeded land; specified hospitals and health-care facilities except as permitted under W.S. 35-9-121.1; mines and appurtenant facilities, oil-field operations, petroleum refineries, and liquefied petroleum gas facilities; specified railway property and equipment; and specified utility automotive equipment. The state fire marshal may still assist those properties or local governmental entities upon request under W.S. 35-9-121.
    • The Wyoming State Fire Marshal's plan-review page states that plans must be accepted or rejected within 5 business days, complete-submittal review is generally completed within 21 business days after acceptance, fees are due before issuance of a Permit to Construct, and no work may begin before that permit is issued.
    • Local enforcement authority requires state delegation under W.S. 35-9-121; a local authority's standards must be equivalent to or more stringent than the department's standards, and local authority can revert to the department if required standards are not maintained.

    building code edition: 2024 International Building Code · adoption date: 2024-06-28 · public-building plan-review threshold: > 5000 square feet of total floor area including basement · child-care plan-review threshold: > 10 children housed · remodeling review threshold: 40000 USD (Remodeling below this amount affecting a built-in fire-protection system is reviewed at no more than $50 per hour; remodeling at or above this amount is subject to W.S. 35-9-108(d).) · remodeling fire-protection review fee cap: <= 50 USD per hour (Applies to remodeling costing less than $40,000 that affects a built-in fire-protection system.)

    “The State of Wyoming, on June 28, 2024 adopted the 2024 International Codes. The following codes apply: 2024 International Fire Code 2024 International Building Code 2024 International Fuel & Gas Code 2024 International Mechanical Code 2024 International Existing Building Code 2026 National Electrical Code”
  • Certificate of occupancyLimited

    Newly constructed buildings subject to state fire-marshal plan review statewide.

    • The requirement is subject to W.S. 35-9-108(h), subsection (q), and W.S. 35-9-118.
    • It applies after new construction is completed and after the state fire marshal inspects the building and determines conformance with the plan review or amended plan review.
    • A remodeled building receives a letter of compliance rather than a certificate of occupancy.
    • No newly constructed or remodeled building may be used or occupied until the required certificate of occupancy or letter of compliance is issued.
    • The state fire marshal may order use and occupancy to cease if the building is used before issuance.
    • The state fire marshal requirement does not apply where a municipality or county has received enforcement authority under W.S. 35-9-121.
    “Except as provided under subsections (h) and (q) of this section and W.S. 35-9-118, after new construction or remodeling of buildings is completed, the state fire marshal shall inspect the building and determine conformance with the plan review or amended plan review. If he finds conformance, the state fire marshal shall issue a certificate of occupancy for a newly constructed building and a letter of compliance for a remodeled building. No newly constructed or remodeled building shall be used or occupied until the state fire marshal has issued a certificate of occupancy or letter of compliance.”
  • Who permits septicMixed (with conditions)

    Small wastewater and septic permitting statewide in Wyoming.

    • DEQ is the permitting authority for small wastewater facilities in Campbell County for commercial systems, and in Carbon, Niobrara, Platte, and Weston Counties.
    • Other jurisdictions may have different permitting authorities, forms, or additional information requirements.
    • The DEQ Water & Wastewater Program states that permits for small wastewater systems in other counties should be located through the applicable permitting authority.
    “DEQ authorizes permits to construct for small wastewater facilities, defined by Wyoming Statutes 35-11-103(c)(ix), that are located in Campbell (commercial systems only), Carbon, Niobrara, Platte, and Weston Counties where DEQ is the permitting authority. The permitting authority for other jurisdictions may require different forms or additional information.”
    5 more reviewed findings on this topic
    • State (with conditions) — Small wastewater facilities in Carbon County, including individual or commercial sewage-disposal systems treating less than 2,000 gallons of domestic sewage per day.
      “DEQ authorizes permits to construct for small wastewater facilities, defined by Wyoming Statutes 35-11-103(c)(ix), that are located in Campbell (commercial systems only), Carbon, Niobrara, Platte, and Weston Counties where DEQ is the permitting authority.”
    • State (with conditions) — Small wastewater facilities in Carbon County within Wyoming DEQ jurisdiction.
      “Carbon, Niobrara, Platte, and Weston Counties where DEQ is the permitting authority.”
    • State (with conditions) — Small wastewater facilities in Carbon County, where DEQ is the permitting authority.
      “DEQ authorizes permits to construct for small wastewater facilities, defined by Wyoming Statutes 35-11-103(c)(ix), that are located in Campbell (commercial systems only), Carbon, Niobrara, Platte, and Weston Counties where DEQ is the permitting authority.”
    • Mixed (with conditions) — Small wastewater facilities, including septic tanks and leachfields, throughout Wyoming.
      “DEQ authorizes permits to construct for small wastewater facilities, defined by Wyoming Statutes 35-11-103(c)(ix), that are located in Campbell (commercial systems only), Carbon, Niobrara, Platte, and Weston Counties where DEQ is the permitting authority. The permitting authority for other jurisdictions may require different forms or additional information.”
    • Mixed (with conditions) — Permitting of small wastewater facilities in Wyoming; DEQ is the permitting authority in the counties and use identified by DEQ, while another permitting authority applies in other jurisdictions.
      “DEQ authorizes permits to construct for small wastewater facilities, defined by Wyoming Statutes 35-11-103(c)(ix), that are located in Campbell (commercial systems only), Carbon, Niobrara, Platte, and Weston Counties where DEQ is the permitting authority. The permitting authority for other jurisdictions may require different forms or additional information.”
  • Septic permitRequired

    Installation, repair, or replacement of individual or commercial sewage disposal systems treating less than 2,000 gallons of domestic sewage per day in Carbon County.

    • The source identifies Carbon County as a location where Wyoming DEQ is the permitting authority.
    • The system must be a small wastewater facility covered by the cited general permit.
    • Construction may not commence until the permitting authority issues authorization.
    • A Certificate of Completion must be submitted to DEQ when installation is complete.
    • A Transfer of Ownership form is required if ownership of a permitted facility is transferred.

    daily domestic sewage treatment capacity: < 2000 gallons per day

    “DEQ authorizes permits to construct for small wastewater facilities [...] that are located in [...] Carbon [...] where DEQ is the permitting authority.”
    5 more reviewed findings on this topic
    • Required — Installation, repair, or replacement of individual or commercial sewage-disposal systems in Carbon County treating less than 2,000 gallons of domestic sewage per day.
      “Construction may not commence until the permitting authority issues authorization.”
    • Required — Installation, repair, or replacement of individual or commercial sewage disposal systems in Carbon County that treat less than 2,000 gallons of domestic sewage per day.
      “Step 4: The permitting authority will review the submitted application package. Once approved, the permitting authority will transmit a permit to construct or a notice of coverage that authorizes construction activities. Construction may not commence until the permitting authority issues authorization.”
    • Limited — Installation, repair, or replacement of individual or commercial sewage disposal systems treating less than 2,000 gallons of domestic sewage per day in Wyoming DEQ permitting jurisdictions.
      “Step 1: Review the Small Wastewater Facility General Permit, which covers the installation, repair or replacement of individual or commercial sewage disposal systems that treat less than 2,000 gallons of domestic sewage per day. See “Permitting Forms and Information” tab.”
    • Required — Installation, repair, or replacement of small wastewater systems, including septic tanks and leach fields, statewide under Wyoming's wastewater permitting framework.
      “A permit is required for the installation, repair or replacement of small wastewater systems, also known as septic tanks and leach fields.”
    • Required — Installation, repair, or replacement of small wastewater systems, also known as septic tanks and leach fields.
      “A permit is required for the installation, repair or replacement of small wastewater systems, also known as septic tanks and leach fields.”
  • Off-grid sanitationLimited

    Incinerating or composting toilets and other off-grid sanitation systems statewide in Wyoming.

    • DEQ states that permits may be required for incinerating or composting toilets.
    • The reviewed source does not specify the complete permit conditions or identify all local permitting variations.
    “Permits may also be required for hydrostatic test discharge water, wastewater reuse, and incinerating/composting toilets.”
    One more reviewed finding on this topic
    • Limited — Use of incinerating or composting toilets as off-grid sanitation in Wyoming.
      “Permits may also be required for hydrostatic test discharge water, wastewater reuse, and incinerating/composting toilets.”
  • Well permitRequired

    Construction of a groundwater well or development of a spring in Wyoming, including domestic and stock wells or springs flowing at most 25 gallons per minute.

    • An approved permit must be received before drilling or spring-development activities begin.
    • Springs flowing more than 25 gallons per minute, or springs used for purposes other than domestic or stock watering, must be permitted through the Surface Water Division.
    • Wells must be drilled by a Wyoming licensed water-well drilling contractor and pumps must be installed by a Wyoming licensed pump-installation contractor.
    • The U.W. 5 application must be complete and accurate and accompanied by the appropriate filing fee.
    • Domestic and stock applications are listed with a $50 filing fee.

    spring flow threshold: <= 25 gallons per minute (Higher-flow springs or non-domestic/non-stock use are handled through the Surface Water Division.) · domestic permit filing fee: 50 USD · stock permit filing fee: 50 USD

    “Wells and Springs - Before you drill a well, or develop a spring* (that flows less than or equal to 25 gallons per minute (gpm) and will be used f or D omestic and/or Stock W atering use only), you must submit an "Application for Permit to Appropriate Ground Water", or U.W. 5 Form, to the Ground Water Division and receive an approved permit prior to commencement of any drilling or spring development activities.”
    2 more reviewed findings on this topic
    • Required — New wells and qualifying domestic/stock springs in Carbon County.
      “you must submit an "Application for Permit to Appropriate Ground Water", or U.W. 5 Form, to the Ground Water Division and receive an approved permit prior to commencement of any drilling or spring development activities.”
    • Required — A person seeking the right to beneficial use of underground water in Wyoming through a well or other means of obtaining underground water.
      “Any person who intends to acquire the right to beneficial use of any underground water in the state of Wyoming, shall, before commencing construction of any well or other means of obtaining underground water or performing any work in connection with construction or proposed appropriation of underground water or any manner utilizing the water for beneficial purposes, shall file with the State Engineer an application for a permit to make the appropriation (i.e., an Application for Permit to Appropriate Ground Water, or a U.W. 5 Form) and shall not proceed with any construction or work until a permit is granted by the State Engineer (W.S. 41-3-930).”
  • Short-term rentalsAllowed

    Short-term rental of detached one- and two-family dwellings and townhomes for purposes of Wyoming fire, building, and electrical standards.

    • The statute addresses classification under fire, building, and electrical standards and the International Building Code.
    • This claim does not resolve local zoning, licensing, lodging-tax, health, or other local requirements.
    “short term rental of detached one (1) and two (2) family dwellings and townhomes shall not be regulated as a commercial use”
  • county zoning authorityGeneral

    County regulation of the location and use of buildings and structures and the use, condition of use or occupancy of land in unincorporated areas of Wyoming.

    • The authority is exercised by each board of county commissioners for the unincorporated area of the county.
    • County zoning may not contravene the zoning authority of an incorporated city or town.
    • A zoning resolution or plan may not prevent a use or occupancy reasonably necessary for extraction or production of mineral resources.
    • A board may not require land use or physical development to be consistent with a local land use plan unless the applicable plan provisions have been incorporated into local zoning regulations.
    • Minimum lot size requirements or other zoning measures may not prevent residential or agricultural uses authorized for land divisions exempt from subdivision requirements under W.S. 18-5-303(a)(i).
    • Private schools meeting the statutory requirements may not be regulated differently from public schools: certification by the professional engineer or architect of record, capacity for fifty (50) students or more, and ownership and operation by a not-for-profit entity.
    “To promote the public health, safety, morals and general welfare of the county, each board of county commissioners may regulate and restrict the location and use of buildings and structures and the use, condition of use or occupancy of lands for residence, recreation, agriculture, industry, commerce, public use and other purposes in the unincorporated area of the county.”
  • county building authorityLimited

    County enforcement and interpretation of local or state fire, building, existing-building, and electrical safety standards, including residential construction in unincorporated areas, when the county obtains local enforcement authority under W.S. 35-9-121.

    • A county must apply for local enforcement authority and receive delegation from the state fire marshal by letter.
    • Before initial delegation, the state fire marshal must determine that the county has adopted minimum standards by ordinance or resolution equivalent to or more stringent than applicable department standards.
    • If the county fails to adopt new standards within six (6) months after department adoption, or fails to maintain standards at least meeting statewide standards, enforcement authority immediately reverts to the department.
    • For fire and building code enforcement, inspectors employed or contracted after July 1, 2010 must be certified by the International Code Council or the International Conference of Building Officials.
    • If electrical-code authority is requested, an electrical inspector must be certified by the International Code Council or International Association of Electrical Inspectors and licensed by Wyoming as a journeyman or master electrician.
    • If the county fails to maintain a required certified inspector, enforcement authority reverts to the department one hundred twenty (120) days after the inspector leaves.
    • A local governmental entity may assume sole plan-review authority and sole construction-inspection authority on approved plans, subject to the statutory certification requirements.
    • If local code provisions are more stringent than adopted state codes, the local code prevails.
    • The statute grants authority to enforce and interpret building standards; it does not establish that every Wyoming county universally requires a residential building permit without county-specific implementation.

    new standards adoption deadline: 6 months (following adoption of new standards by the department) · certification applicability date: July 1, 2010 (inspectors employed or contracted after this date) · authority reversion period after certified inspector leaves: 120 days

    “The state fire marshal shall delegate complete authority to municipalities and counties which apply to enforce and interpret local or state fire, building, existing building standards or electrical safety standards which meet the requirements of this section. The state fire marshal shall notify the governing body of the municipality or county of the minimum standards and requirements of this act and W.S. 16-6-501 and 16-6-502 and transfer jurisdiction and authority by letter.”

Still unanswered

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

  • Inspections — Building inspections in unincorporated Carbon County.
  • Minimum dwelling size — Minimum floor area or dimensional requirements for dwellings in unincorporated Carbon County.
  • Setbacks — Building setbacks in unincorporated Carbon County.
  • Lot coverage — Lot coverage in unincorporated Carbon County.
  • Building height — Building height in unincorporated Carbon County.
6 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Septic inspection

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Carbon County, Wyoming

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

Carbon County scores 57/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost and sparse surroundings — about 541 people within 15 miles. Watch-outs: thin water margin (15.6″/yr rainfall).

Do you need a building permit in Carbon County, Wyoming?

Carbon County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Wyoming Department of Environmental Quality (WY DEQ), Water Quality Division. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Carbon County, Wyoming?

Land in Carbon County runs about $971 per acre, based on the latest county data.

What is the water situation in Carbon County?

Carbon County gets about 15.6" of rain a year, with severe drought in roughly 16.6% of years.

How remote is Carbon County?

A typical private-land location has about 541 people within 15 miles and 519,670 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Carbon compares in Wyoming

Compare side-by-side →See all 23 Wyoming counties ranked →