Building ADUs in Jackson Hole and Teton County, Wyoming
Land in Jackson Hole is expensive enough that an accessory dwelling unit is often the highest-value move you can make on a residential lot. Teton County WY draws a hard line between an ADU and a guest house, with size caps, employee housing carveouts, and covenant complications that change what your unit is worth on paper. I build fixed-price ADUs in Jackson, Wilson, Teton Village, and unincorporated Teton County WY. Full pricing structure on the ADU Builds hub. Ready to price yours? Start here.
The Problem With Building an ADU in Jackson Hole
Building an ADU in Teton County WY is not the same as building one in Idaho. The county ordinance separates an accessory residential unit from a guest house based on kitchen, occupancy, and rental rights, and which one you build determines whether the unit rents, houses employees, or just sleeps guests three months a year [VERIFY WITH BRYCE on current ARU vs guest house definitions].
Nightly rental is prohibited in most Teton County WY residential zones. Monthly rental to employees is generally allowed and often encouraged under the county’s workforce housing framework. If Airbnb income was the plan, verify your zone before design.
Restrictive covenants matter as much as county code here. Many Jackson subdivisions bar ARUs outright or add restrictions beyond the county rules. Wildlife setbacks and wildfire defensible space rules add ongoing site constraints. Land at $2M to $10M-plus per residential parcel means the ADU is often the best use of your allowed secondary structure footprint. Build it once and build it to a spec that matches the rest of the property.
Why a 20-Year GC on a Jackson ADU
I am Bryce Swager, fourth-generation Rigby builder running fixed-price GC work in Teton Valley and Jackson for 20 years. SwagerBuilds is licensed and insured for Wyoming work.
What that gets you on a Jackson ADU:
- I have run jobs on both sides of the pass long enough to know the Teton County WY Planning department’s read on ARU versus guest house on borderline designs. That distinction moves your resale value and your rental income model.
- I have working relationships with Jackson subs, especially the ones who still take a call in mid-July when everyone else is booked out. On a Jackson ADU, sub availability is your biggest schedule risk.
- Cold-weather concrete matters even more at Jackson elevation. Pours in October and April require the mix, additive, and blanket protocol I have used on Teton Valley slabs for two decades.
- Fixed-price with no allowances. On a Jackson build where every line item costs more, that discipline matters more.
- Every job runs through JobTread. Daily photo log, live budget, and RFIs from your laptop wherever you live. Most of my Jackson clients are out of state.
What This Costs
Straight talk on Jackson ADU pricing: labor and material rates run higher across the pass than on the Idaho side, and the per-square-foot number reflects it. A detached ARU in the 800 to 1,000-square-foot range with a full kitchen, one bath, and independent utility connections lands in a range that accounts for Jackson-side labor, snow-load engineering, and covenant-driven finish requirements. [VERIFY WITH BRYCE — specific $/sf range to publish]
That range assumes:
- Standard site with existing access and utilities near the property line
- Sewer connection if on public sewer, otherwise septic sizing evaluation
- Mid to upper mid-range finishes, since Jackson HOA covenants often force finish upgrades
- No custom architectural review requirements from a design-review board
Add-ons that push the number: reclaimed timber siding, custom board-formed concrete, standing seam roofing, radiant floors, and covenant-mandated stone accents. Every line lands in the fixed-price contract before you sign.
Permits and Codes
Teton County WY Planning permits ADU work outside the Town of Jackson. Inside town limits, Town of Jackson Planning handles it. Both jurisdictions run separate ADU tracks with size caps, setback rules, and lot coverage limits.
Accessory Residential Unit size limits typically fall around 1,000 square feet or a percentage of the primary residence, whichever is less [VERIFY WITH BRYCE on current cap]. Guest houses have different size and use rules. Get the classification right on paper before design or you rebuild the plans.
Restrictive covenants: many subdivisions across Jackson, Wilson, and Teton Village either prohibit ARUs or add restrictions beyond county code. Pull your CC&Rs before committing to a scope. Some HOAs also require design review board approval on any secondary structure.
Wildfire defensible space applies under the wildland urban interface rules, meaning setbacks from combustible vegetation and specific roof and eave detailing. Wildlife setbacks apply along riparian corridors and known migration routes.
The Fixed-Price Process
How every SwagerBuilds ADU runs: you send a rough concept and lot photos, I do a site walk, we scope it together, and I put a fixed number in a real contract before you commit. No cost-plus. No allowances that grow through the build. If I missed something inside the scope, it is on me unless you sign a written change order.
You get a JobTread client portal from day one. Daily photo log, live budget, RFIs, change orders, schedule. Most of my Jackson clients are out of state. You run the whole job from your desk. Read the full process writeup for how the fixed-price is structured and how change orders work when you actually change the scope.
Remote-Owner Friendly
Most Jackson ADU clients are out-of-state owners who bought a lot in the last five years and want the ARU built without flying in every three weeks. The JobTread portal plus weekly video walkthroughs handles it. Selection calls run on Zoom with screen share. Deliveries, inspections, and sub schedules run on my calendar, not yours. Read Build From Anywhere for the full remote workflow and what I need from you at each phase of a Jackson build.
Jackson Hole ADU FAQ
What is the difference between an ADU and a guest house in Jackson?
Teton County WY draws the line on kitchen presence, independent utilities, and rental rights. An accessory residential unit generally has a full kitchen, can be sub-metered or independently metered, and can be rented under the county’s monthly rental rules where allowed. A guest house has more restricted kitchen requirements and cannot be independently rented. Which one you build changes both your annual income potential and your resale value at exit. Get the classification right on paper before design. [VERIFY WITH BRYCE on current definitions]
Can I rent my Jackson ADU to employees versus tourists?
Nightly rental is prohibited in most Teton County WY residential zones, meaning Airbnb income is off the table on most parcels. Monthly rental is generally allowed, and rental to workforce or employees is often encouraged under the county’s workforce housing framework, sometimes with reduced impact fees or an expedited review path. If your business needs employee housing, this is often the highest-value use of the ADU footprint. Verify the zone-specific rules before design. [VERIFY WITH BRYCE]
What is the ADU size limit in Teton County WY?
The county caps ARU size at roughly 1,000 square feet or a percentage of the primary residence square footage, whichever is smaller [VERIFY WITH BRYCE on current cap]. Guest houses run on a different cap. On top of the county rule, individual subdivisions often add their own size limits through CC&Rs, sometimes tighter than the county. I check both the county cap and the covenant cap during the scoping call so we do not design a unit the review board will not approve.
Do you build in Wilson and Teton Village?
Yes. I run ADU work across Teton County WY including Jackson, Wilson, Teton Village, and unincorporated county land. Each has different HOA and covenant regimes. Wilson has a mix of newer subdivisions with strict design review boards and older parcels with looser rules. Teton Village has some of the tightest architectural review in the county. I pull the CC&Rs and any design-review guidelines during scoping so the fixed-price contract reflects real requirements, not assumptions.
What are the wildfire setback requirements for ADUs?
Teton County WY sits inside the wildland urban interface, meaning defensible space rules apply to every new structure. The county enforces vegetation clearance in zones out from the structure, ignition-resistant roofing, ember-resistant eave and vent detailing, and material choice restrictions on exterior siding within certain distances. Some subdivisions add stricter rules on top. I scope the required detailing into the fixed price so the ADU passes inspection without change orders later. [VERIFY WITH BRYCE on current WUI zones and clearances]
Related Reading
- ADU Builds hub — types, finish tiers, and pricing structure
- ADU + Shop Addition Guide — combined ADU-and-shop planning
- Our Fixed-Price Process — scoping, contract, change orders
- Build From Anywhere — remote-owner workflow
Ready to Price a Jackson Hole ADU?
Send the concept, the address, and what you want the unit to do (employee housing, family use, monthly rental, or a mix). I come back with a scope and a real number in 5 to 10 days.