Teton County, Wyoming requires a building permit for new structures and many additions or alterations in unincorporated areas, with narrow exceptions for qualifying agricultural and small non-habitable accessory buildings.1 County zoning applies to unincorporated parcels, while the Town of Jackson is a different jurisdiction with different regulations.23 Septic permits come from the county, and the county's land development regulations prohibit using a camping trailer or RV as residential living quarters.45
At a glance
- Building permit
- Required for new structures and listed additions or alterations1
- Zoning
- County zoning applies in unincorporated Teton County2
- Septic
- County permit required before construction, installation or modification4
- Private well
- State permit required before drilling6
- RV living
- Prohibited as living quarters, except a temporary trailer while a residential building permit is active5
- Tiny home
- Occupancy rule not confirmed; dwelling construction still needs review2
- Owner-builder exemption
- State general-contractor licensing is not required, but local approvals still apply7
- Agricultural building
- Narrow permit exception below 600 sq. ft. when all conditions are met8
Who to call
Building permits
Teton County Planning & Building — Building Division
County building-permit applications, plan review and construction inspections
200 S Willow Street, Jackson, WY 83001
Zoning
Teton County Planning & Building — Planning
Planning permits, zoning, land-development questions and parcel-specific guidance
planneroftheday@tetoncountywy.gov
Teton County Administration Building, 2nd Floor, 200 S Willow Street, Jackson, WY 83001
Septic permits
Teton County Engineering Division
Small wastewater facility permits and septic-system questions
200 S Willow Street, Jackson, WY 83001
Floodplain permits
Teton County Engineering — Floodplain Management
Floodplain program questions, permit requirements and fees
200 S Willow Street, Jackson, WY 83001
Roads & driveways
Teton County Road & Levee Department
Access permits for driveways connecting to county roads
3190 S Adams Canyon Drive, Jackson, WY 83001
Contact details are copied from each office’s official page and were checked against it on October 9, 2026.
Off-grid gear
Going off-grid in Teton County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Teton County, Wyoming?
Yes, in unincorporated Teton County. The county requires a building permit for new structures and listed work such as additions, porches, certain retaining walls, roof or window replacements, exterior doors, interior remodels, and elevated decks.1 Qualifying agriculture-related buildings are excepted only when they house farm implements, feed, or livestock, are under 600 square feet, and have no more than two sides; a planning review may still be necessary.8 Small non-habitable accessory structures also have a limited exception under the county's stated conditions.1
Applications submitted on or after February 1, 2025 must use the 2024 IRC and IBC editions.9 The county's building-code adoption lists the 2024 International Building Code.10 Plan review adds a fee equal to 65% of the building permit fee.11 Permit holders must request inspections when work is ready, and inspections must occur at least every 180 days to keep a permit active.12
Who issues Teton County building permits, and how do you reach them?
The Teton County Planning & Building Department handles county building permits through its Building Division at 200 S Willow Street in Jackson.13 Call 307-733-7030 for permit-process questions, submit the application through the county online portal, and request inspections online or by telephone.1314 New residential, commercial, and small miscellaneous projects require scheduled submission weeks, while trade permits do not.15
Planning applications are digital through the SmartGov portal.15 For allowed uses, setbacks, height limits, and planning approvals, contact Teton County Planning at 307-733-3959 or planneroftheday@tetoncountywy.gov.16 County and municipal jurisdictions have different regulations, so use the parcel's jurisdiction rather than its mailing address to choose the correct office.3
Does Teton County have zoning?
Yes, in unincorporated Teton County. The Teton County Land Development Regulations establish urban, suburban, rural, conservation, special-purpose, and overlay zoning classifications for unincorporated Teton County.17 County and municipal jurisdictions have different regulations.3
A parcel's district, proposed use, and recorded plat matter because building-height restrictions depend on zoning and sometimes use, while a subdivision plat may add restrictions.18 Natural-resource setbacks include 150 feet from rivers, 100 feet from perennial or intermittent streams and natural lakes or ponds, 30 feet from ephemeral streams, and 50 feet from wetlands.19 We could not confirm countywide numeric rules for minimum dwelling size, minimum lot size, or lot coverage; ask the Planner of the Day for a parcel determination before design begins.16
How do septic permits work in Teton County?
Teton County administers small wastewater facilities under authority delegated by the Wyoming Department of Environmental Quality, and the county rules may not be less stringent than corresponding state regulations.20 A county permit is required before constructing, installing, or modifying a small wastewater facility, apart from the stated initial emergency-response exception.4 Contact Engineering at 307-733-3317 or engineering@tetoncountywy.gov before fixing the house location or system design.21
Only 3.4% of mapped county soils are rated without severe limitations for a conventional septic drain field, so test wastewater feasibility early rather than assuming acreage guarantees a workable conventional system.22 Privies or outhouses may not be built within the 100-year floodplain, and the design engineer must certify that an installed small wastewater system conforms to the approved design before or with the Sanitarian's final inspection.2324 We could not confirm every off-grid sanitation alternative that qualifies; ask Engineering about the proposed system and parcel.21
Can you live in an RV or tiny home on land in Teton County?
No for an RV, with one exception. The Teton County Land Development Regulations prohibit using a camping trailer or RV as residential living quarters, except for temporary use of a trailer in conjunction with an active building permit for a residential structure.5 A camping trailer in use must be parked in an authorized campground, though the county does not stop you from storing it on your property when not in use, as long as outside-storage standards are met.25
We could not confirm a countywide rule on tiny-home occupancy in unincorporated Teton County; ask the Planner of the Day how the parcel's zoning district, proposed use, wastewater plan, and recorded plat affect it.16 A small dwelling is still within the county's building-permit framework, and the confirmed accessory-structure exception covers only non-habitable structures.1 Constructing, installing, or modifying a small wastewater facility also requires a septic permit from the county.4 Short-term rentals are limited in unincorporated Teton County: rentals under 31 days are prohibited except in listed locations.26
Building a home in Teton County: what are the steps?
- Confirm whether the parcel is in unincorporated Teton County or a municipality, because the jurisdictions use different regulations.3
- Ask Planning to identify the zoning district, allowed use, setbacks, district-specific height limits, plat restrictions, and required applications.172718
- Resolve the wastewater design with Teton County Engineering and obtain the required permit before installation or modification.4
- Obtain an approved Wyoming groundwater permit before drilling a private well; domestic and stock applications carry a $50 filing fee.6
- File digital planning applications and the building application through SmartGov, scheduling a submission week when the project type requires one.1514
- If access connects to a county road, obtain the no-charge Road Access Permit.28
- Request inspections online or by telephone when work is ready and keep them within 180 days of one another while the permit remains active.1412
What should you check before buying land in Teton County?
Start with jurisdiction, zoning, the recorded plat, legal access, water, wastewater feasibility, and mapped floodplain. County zoning regulates unincorporated land, municipal regulations differ, and subdivision or platting is regulated through the county Land Development Regulations.329 For parcels of 35 acres or more covered by Wyoming's large-parcel rule, binding and recordable access and utility easements must generally be at least 40 feet wide to a public road unless properly waived.30
Ask Floodplain Management about permit requirements if mapping places a building site in a floodplain.31 A driveway from a county road requires a county Road Access Permit.28 Septic deserves special attention because only 3.4% of mapped soils avoid a severe conventional-drain-field limitation.22 The effective property-tax rate is about 0.4%, and the median annual property-tax bill is $5,462.3233
Watch-outs
- Do not plan to live in an RV while you build unless an active residential building permit is in place; the county prohibits RVs as residential living quarters otherwise5.
- Do not apply municipal rules to an unincorporated Teton County parcel; county and municipal jurisdictions have different regulations.3
- Natural-resource buffers can move a building envelope substantially: confirmed county setbacks reach 150 feet from rivers and 50 feet from wetlands.19
- A private well needs an approved Wyoming groundwater permit before drilling begins.6
- The agricultural building exception is narrow, and qualifying buildings may still need planning review.8
- Wyoming does not require a statewide general-contractor license for an owner working on a primary residence, but county approvals still apply and we could not confirm a separate county owner-builder exemption.713
Sources
- Building a Structure Without a Building Permit, quoted and re-checked
- Teton County Land Development Regulations, quoted and re-checked
- tetoncountywy.gov, quoted and re-checked
- Title 9 Small Wastewater Facility Regulations, quoted and re-checked
- Camper Trailer as Living Quarters, quoted and re-checked
- seo.wyo.gov (Wyoming statewide rule), quoted and re-checked
- Startup Resources — Wyoming Business Council (Wyoming statewide rule), quoted and re-checked
- Building a Structure Without a Building Permit, quoted and re-checked
- Building, quoted and re-checked
- County Building Codes Resolution, quoted and re-checked
- Building Permit Fees, quoted and re-checked
- Building, quoted and re-checked
- Teton County Planning & Building — Building Division (tetoncountywy.gov)
- Building, quoted and re-checked
- Building, quoted and re-checked
- Teton County Planning & Building — Planning (tetoncountywy.gov)
- Teton County Land Development Regulations, quoted and re-checked
- Frequently Asked Questions, quoted and re-checked
- tetoncountywy.gov, quoted and re-checked
- Title 9 Small Wastewater Facility Regulations, quoted and re-checked
- Teton County Engineering Division (tetoncountywy.gov)
- 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
- Title 9 Small Wastewater Facilities, quoted and re-checked
- Title 9 Small Wastewater Facilities, quoted and re-checked
- Camper Trailer as Living Quarters, quoted and re-checked
- tetoncountywy.gov, quoted and re-checked
- Frequently Asked Questions, quoted and re-checked
- Teton County Road & Levee Department (tetoncountywy.gov)
- Teton County Land Development Regulations, quoted and re-checked
- Wyoming Statutes, Title 18 (Wyoming statewide rule), quoted and re-checked
- Teton County Engineering — Floodplain Management (tetoncountywy.gov)
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.