Hot Springs County, WY Building Permits & Zoning

Unincorporated Hot Springs County, Wyoming is reported not to require a general residential building permit, but new construction should still go to the county Planning Office for land-development review¹². Hot Springs County has land-use categories similar to zoning, and the Planning Office reviews and approves residential septic permits³⁴. Whether the county has adopted a building code or requires general building inspections could not be confirmed, so ask the Planning Office before finalizing plans.

At a glance

Building permit: No general residential building permit reported; contact Planning before new construction¹²
Zoning: County land-use categories operate similarly to zoning⁵³
Septic permit: Required before construction and approved by the county Planning Office⁶⁴
RV living: Long-term occupancy could not be confirmed; ask the Planning Office²
Tiny home: Occupancy and dimensional rules could not be confirmed; ask the Planning Office²
Owner-builder: No explicit owner-builder exemption was confirmed⁷
Well permit: State approval is required before drilling or developing a qualifying spring⁸
Septic soils: Only 15.1% of soils lack severe limits for a conventional drain field⁹

Who to call

Planning & zoning

Hot Springs County Planning Office

Land-development review, land-use requests, addressing, subdivision guidance, statutory exemptions, and residential septic permits

307-864-2961

415 Arapahoe, Thermopolis, WY 82443

Roads & driveways

Hot Springs County Road & Bridge

County-road maintenance and questions involving county roads

307-864-3497

740 Springview, Thermopolis, WY 82443

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

Do you need a building permit in Hot Springs County, Wyoming?

Unincorporated Hot Springs County is reported not to administer a general residential building permit, based on a Wyoming county permitting survey and the county's use of land-development rather than general building permits¹. Treat that answer narrowly: the county Planning Office tells anyone proposing new construction to contact it first so staff can determine which county and state rules apply². The office reviews proposed development on private land and publishes a land-development permit application, so a project may need planning approval even when it does not need a general residential building permit². We could not confirm whether Hot Springs County has adopted a building code, conducts general building inspections, or issues certificates of occupancy. Wyoming counties can enforce building standards only after receiving delegated authority and meeting state requirements, but that statewide authority does not establish that Hot Springs County has done so¹⁰.

Who handles Hot Springs County permits, and how do you reach them?

The Hot Springs County Planning Office is the first stop for rural construction, land-use requests, property addressing, subdivisions, statutory exemptions, and residential septic permits². Call 307-864-2961 or visit 415 Arapahoe, Thermopolis, Wyoming, before construction or land division begins². The Planning Office also coordinates county fire numbers, the property addresses used for rural parcels². For a parcel involving a county road, Hot Springs County Road & Bridge maintains county roads and can answer road-related questions at 307-864-3497 or 740 Springview, Thermopolis, Wyoming¹¹. A specific county driveway-permit rule could not be confirmed, so describe the proposed entrance and road when you call rather than assuming approval is automatic.

Does Hot Springs County have zoning?

Yes, in a limited local form: Hot Springs County uses agricultural, residential, commercial, industrial, institutional, and airport land-use categories, while the official survey describes the system as similar to zoning rather than classic Euclidean zoning³. Hot Springs County also reports parking requirements for certain commercial uses⁵. Wyoming law allows county commissioners to regulate building locations and land uses in unincorporated areas, but that statewide authority does not by itself answer what a particular Hot Springs County parcel allows¹². Numeric setbacks, minimum lot size, lot coverage, building height, and minimum dwelling size could not be confirmed from the available county rules. Ask the Planning Office for a parcel-specific determination, especially before relying on a seller's description of land as unrestricted². Incorporated towns may apply their own rules because Wyoming county zoning authority described here applies to unincorporated land¹².

How do septic permits work in Hot Springs County?

A residential septic permit is required in Hot Springs County, and construction may not begin until the permitting authority authorizes it⁶. The Hot Springs County Planning Office reviews and approves applications and permits for residential septic systems⁴². Wyoming DEQ directly permits small wastewater facilities only in specified jurisdictions, while other jurisdictions use their own permitting authority and may require different forms or information¹³. Site conditions deserve early attention because only 15.1% of Hot Springs County soils are rated without severe limitations for a conventional septic drain field⁹. That soil rating does not decide whether an individual parcel will pass, so take the parcel location and proposed home details to the Planning Office before settling on a house site². The county's inspection steps and current septic fee could not be confirmed from the published material; ask the Planning Office when requesting the application.

Can you live in an RV or tiny home in Hot Springs County?

We could not confirm a Hot Springs County rule that expressly allows or prohibits long-term RV occupancy, temporary camping, or tiny-home occupancy on private rural land. The county does use land-use categories, and its Planning Office reviews proposed development and tells applicants which county and state rules apply³². That makes the Planning Office the right place to describe whether the unit will be on wheels or a foundation, whether it will be occupied during construction, and how wastewater will be handled². A tiny home that uses an onsite wastewater system still needs the county's residential septic approval before septic construction begins⁶⁴. Do not treat the absence of a confirmed published occupancy rule as permission; obtain a parcel-specific answer before buying land or moving a unit onsite.

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

Call the Hot Springs County Planning Office at 307-864-2961 with the parcel number and project description; the office asks people proposing new construction to contact it first².

Confirm the parcel's land-use category and ask which land-development paperwork applies before finalizing the site plan³².

Obtain a county fire number if the property needs an address; the Planning Office coordinates those numbers².

Apply through the Planning Office for residential septic approval, and do not begin septic construction before authorization⁴⁶.

For a well, obtain an approved Wyoming groundwater permit before drilling; domestic and stock applications carry a $50 filing fee⁸.

If the project divides land, confirm county subdivision review before selling, recording a plat, or beginning subdivision construction¹⁴².

What should you check before buying land in Hot Springs County?

Start with wastewater: only 15.1% of county soils are rated without severe limits for a conventional drain field, so confirm a workable septic location before choosing the building site⁹. Secure water next because Hot Springs County averages 13.3 inches of precipitation a year, and Wyoming requires an approved permit before drilling a groundwater well¹⁵⁸. Confirm legal access and recorded easements; Wyoming's large-parcel subdivision rule generally exempts parcels of at least 35 acres but requires recordable access and utility easements at least 40 feet wide unless properly waived¹⁶. Check the Planning Office for the parcel's land-use category, address status, subdivision history, and any development review³². Floodplain permit applicability could not be confirmed for Hot Springs County, so ask the Planning Office about mapped flood hazards before placing a home. Property taxes average about 0.6%, with a median annual bill near $1,202¹⁷¹⁸.

Watch-outs

No general residential building permit is reported, but the Planning Office still directs anyone proposing new construction to contact it before work begins¹².
Only 15.1% of Hot Springs County soils are rated without severe limits for a conventional septic drain field, and residential septic construction requires county approval⁹⁶.
RV living, tiny-home occupancy, setbacks, and minimum dwelling size remain unconfirmed; ask the Planning Office for a parcel-specific answer².

Sources

Written September 28, 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.

How Hot Springs County scores

Seclusion88100% ev.

Self-Sufficiency2396% ev.

Admin Boringness6890% ev.

Durability41100% ev.

Property Autonomy74100% ev.

Carry Cost8896% ev.

Evidence strength: 97%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$245kTypical home

0.6%Property tax

$823Land / acre

13.3"Annual rain

14.9% of yrsSevere drought

3.5 / yr (+3.2)Mid-century 100°F days

23.6 daysMid-century dry spell

1" (+7.2%)Mid-century 1-day rain

1.18×Wildfire change factor

100%Forward climate coverage

$1,254Home insurance / yr

1.7% / yrInsurance growth

0.8%Nonrenewal rate

single ZIP shrunk to state medianInsurance basis

465Radius comparison (15 mi)

2.3People / sq mi

42.2%Federal land

60.2%Land at 15% slope or less

15.1%Septic soil without severe limits

100,674 acWorkable land screen

10.7%Wooded land

7.8 tonsBiomass / forest ac

43.7°FAvg temp

Answers from the rulebook for Hot Springs County

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

Hot Springs County rules

County-wide zoningPresent (with conditions)
Hot Springs County land-use regulation, including unincorporated county areas.
- The official survey describes the regulations as similar to zoning but not classic Euclidean zoning.
- The survey identifies some parking requirements for certain commercial uses.
- The survey states that few commercial activities occur in the unincorporated portion of the county.
“Hot Springs County has land use regulations similar to zoning, but they are not classic Euclidian zoning.”
County Zoning, Licensing and Permitting ↗Re-checked Sep 29, 2026
Zoning districtsPartial
Hot Springs County land-use categories reported in the official county survey.
- The survey lists Agriculture, Residential, Commercial, Industrial, Institutional, and Airport categories.
- The survey expressly states that the system is similar to zoning but is not classic Euclidean zoning.
“Agricultural, Residential, Commercial, Industrial, Institutional, Airport”
County Zoning, Licensing and Permitting ↗Re-checked Sep 26, 2026
Who permits septicCounty
Residential septic-system applications and permits in Hot Springs County.
- The county planner page states that residential septic applications and permits are reviewed and approved by the Hot Springs County Planning Office.
- State requirements may also apply; the county page directs applicants to determine which county and state regulations apply.
“Applications and permits for residential septic systems are reviewed and approved by the Hot Springs County Planning Office.”
Planner - Hot Springs County Wyoming ↗Re-checked Sep 29, 2026
One more reviewed finding on this topic
- County — Residential septic-system permitting in Hot Springs County.
  “Applications and permits for residential septic systems are reviewed and approved by the Hot Springs County Planning Office.”
  Planner - Hot Springs County Wyoming ↗Re-checked Sep 29, 2026
Septic permitRequired
Installation, repair, or replacement of residential septic systems in Hot Springs County.
- Hot Springs County Planning Office reviews and approves residential septic applications and permits.
- Wyoming DEQ states that a permit is required for installation, repair, or replacement of small wastewater systems; the applicable permitting authority may require different forms or additional information.
- Construction may not commence until the permitting authority issues authorization.
“A permit is required for the installation, repair or replacement of small wastewater systems, also known as septic tanks and leach fields.”
Planner - Hot Springs County Wyoming ↗Re-checked Sep 29, 2026
One more reviewed finding on this topic
- Required — Residential septic systems in Hot Springs County.
  “Construction may not commence until the permitting authority issues authorization.”
  Planner - Hot Springs County Wyoming ↗Re-checked Sep 26, 2026
Subdividing landRegulated (with conditions)
Proposed developments and land divisions on private lands within Hot Springs County.
- Applications for land-use changes, subdivisions, and related requests must be obtained from the Planning Office.
- The Planning Office determines who may qualify for statutory exemptions from county subdivision requirements.
- Applicants should contact the Planning Office before dividing land to determine which county and state regulations may apply.
“Applications for land-use changes, subdivisions, and related requests must be obtained from the Planning Office.”
Planner - Hot Springs County Wyoming ↗Re-checked Sep 29, 2026
Permit processPartial
County land-use, subdivision, and septic permitting processes in Hot Springs County.
- Applicants must obtain applications for land-use changes, subdivisions, and related requests from the Planning Office.
- The county recommends contacting the Planning Office before new construction or land division to determine applicable county and state regulations.
- The opened page does not provide complete application forms, review timelines, or fee information.
“Anyone proposing new construction or considering dividing land should contact the Planning Office first to determine which County and State regulations may apply.”
Planner - Hot Springs County Wyoming ↗Re-checked Sep 29, 2026
Building permitNot required
Wyoming has no statewide building code; the WCCA county survey lists no building permit for Hot Springs County, and the county Planner issues land-use change and subdivision permits rather than a general residential building permit.
Wyoming County Commissioners Association - County Zoning, Licensing and Permitting Survey ↗Scouted from the county site, not yet independently re-checked

Wyoming rules that apply here

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.”
General Processes ↗Re-checked Sep 21, 2026
Agricultural exemptionAvailable (with conditions)
Certain land divisions for agricultural purposes under Wyoming's Real Estate Subdivisions Act, primarily in unincorporated areas subject to county administration.
- The exemption applies unless the method of sale or other disposition is adopted for the purpose of evading the Act.
- The division must be a sale or other disposition of land for agricultural purposes or affect the alignment of property lines for agricultural purposes.
- The exempt divisions remain subject to county-board requirements regarding documentation of proper use and implementation of the exemption.
- A division for an immediate family member has separate conditions, including qualifying family relationship, housing, business, or agricultural purpose, ownership and titling periods, and a five-acre further-division restriction; that family exemption is distinct from the agricultural-purpose exemption.
- For parcels 35 acres or larger, ingress, egress, and utility easements of at least 40 feet to a public road are required unless specifically waived by the grantee or transferee in a binding and recordable document.
large-parcel threshold: >= 35 acres (Subject to W.S. 18-5-316 and required easements.) · large-parcel easement width: >= 40 feet (To a public road; waiver must be binding and recordable.)
“A division which is a sale or other disposition of land for agricultural purposes or affects the alignment of property lines for agricultural purposes;”
Wyoming Statutes, Title 18 ↗Re-checked Sep 21, 2026
Driveway accessRequired
Sale or other disposition of parcels 35 acres or larger subject to Wyoming subdivision law.
- The rule is subject to W.S. 18-5-316.
- Ingress, egress, and utility easements must be provided to each parcel by binding and recordable easements to a public road.
- The easements must be at least 40 feet wide unless specifically waived by the grantee or transferee in a binding and recordable document.
parcel area: >= 35 acres (subject to W.S. 18-5-316) · easement width: >= 40 feet (may be specifically waived by the grantee or transferee in a binding and recordable document)
“Except as provided in W.S. 18-5-316, this article shall not apply to the sale or other disposition of land where the parcels involved are thirty-five (35) acres or larger, subject to the requirement that ingress and egress and utility easements shall be provided to each parcel by binding and recordable easements of not less than forty (40) feet in width to a public road unless specifically waived by the grantee or transferee in a binding and recordable document.”
Wyoming Statutes, Title 18 ↗Re-checked Sep 21, 2026
Building in a floodplainRequired
Building within the floodplain in Wyoming communities participating in the state-supported National Flood Insurance Program floodplain-management program.
- The source states that Wyoming currently has 19 participating counties and 66 participating municipalities.
- Enrollment and participation require a community letter of resolution, an application form, a permitting process, and a compliant ordinance adopted.
- The permit must meet minimum standards set forth in the applicable local ordinance.
- The source describes state technical assistance and oversight, while the local ordinance supplies the applicable minimum standards.
participating counties: 19 counties · participating municipalities: 66 municipalities
“Currently in Wyoming, there are 19 participating counties and 66 participating municipalities. Enrollment and participation in the program requires a letter of resolution by the community, an application form, a permitting process, and a compliant ordinance adopted. Building within the floodplain requires a permit, and must meet minimum standards set forth in the local ordinance.”
2027-2028 Biennium Unit Narrative, Wyoming Office of Homeland Security ↗Re-checked Sep 21, 2026
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.”
Wyoming Statutes, Title 18, W.S. 18-5-201 ↗Re-checked Sep 21, 2026
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.”
Wyoming Statutes, Title 35, W.S. 35-9-121 ↗Re-checked Sep 21, 2026

Still unanswered

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

Owner-builder exemption — Owner-builder exemptions from residential building permitting or inspection requirements.
Building code adopted — County building-code adoption for residential construction.
Inspections — Residential building inspections in Hot Springs County.
Certificate of occupancy — Certificates of occupancy for residential buildings in Hot Springs County.
Local zoning — Aggregate local zoning across Hot Springs County and incorporated municipalities.

15 more unanswered

Minimum dwelling size
Minimum lot size
Setbacks
Lot coverage
Building height
Living in an RV
Camping on your land
Tiny homes
Manufactured homes
Accessory dwellings
Septic inspection
Off-grid sanitation
Mandatory utility hookup
Short-term rentals
Permit fees

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 Hot Springs County, Wyoming

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

Hot Springs County scores 56/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost and deep seclusion — about 465 people within 15 miles. Watch-outs: weak self-sufficiency basics: only 13.3″ of rain a year and elevated current hazard exposure.

Do you need a building permit in Hot Springs County, Wyoming?

Hot Springs County does not require a county building permit for a home in unincorporated areas, and it enforces county zoning. Onsite septic is permitted by Hot Springs County Planning Office. 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 Hot Springs County, Wyoming?

Land in Hot Springs County runs about $823 per acre, based on the latest county data.

What is the water situation in Hot Springs County?

Hot Springs County gets about 13.3" of rain a year, with severe drought in roughly 14.9% of years.

How remote is Hot Springs County?

A typical private-land location has about 465 people within 15 miles and 181,971 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

Building permits, zoning and land rules in Hot Springs County, Wyoming

At a glance

Who to call

Do you need a building permit in Hot Springs County, Wyoming?

Who handles Hot Springs County permits, and how do you reach them?

Does Hot Springs County have zoning?

How do septic permits work in Hot Springs County?

Can you live in an RV or tiny home in Hot Springs County?

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

What should you check before buying land in Hot Springs County?

Watch-outs

Sources

Hot Springs County in Wyoming

How Hot Springs County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Hot Springs County

Hot Springs County rules

Wyoming rules that apply here

Still unanswered

Living off-grid in Hot Springs County, Wyoming

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

Do you need a building permit in Hot Springs County, Wyoming?

How much does land cost in Hot Springs County, Wyoming?

What is the water situation in Hot Springs County?

How remote is Hot Springs County?

How Hot Springs compares in Wyoming