ADUs, Shops, and Additions in Teton Valley + Jackson Hole — The Complete Guide
20 years, hundreds of projects, one honest guide. If you own land or a home in Teton Valley, Driggs, Victor, Alta, or Jackson Hole and you’re weighing an ADU, a detached shop, or a home addition — this is the guide we wish existed when we started. Real dollar ranges. Real permit paths. Real 10-year value math. No brochure numbers.
Every article linked below hits the same four questions: pros and cons, real cost, permitting, and future value. Because those are the four questions you’d ask us at a kitchen table.
ADUs — Accessory Dwelling Units
An ADU can pay for itself in Teton County — or it can be a $400k mistake. It depends on the setback, the septic, the STR rules, and whether you built it right. Start here:
- ADU Cost, Permits, and ROI in Teton Valley — Complete Pros and Cons (pillar)
- Detached ADU vs Attached ADU in Driggs — Which One Makes Sense?
- ADU Rental Income Potential in Jackson Hole + Victor — What Owners Actually Earn
- Building an ADU in Rigby or Rexburg — Permits, Setbacks, and the Eastern Idaho Path
- ADU vs Home Addition — Which Adds More Value in Teton Valley?
Detached Shops
The most common thing we build in this valley isn’t a house — it’s a shop. RV bays, toy barns, heated 40x60s, three-bay with a loft. Costs range from $75/sf to $250/sf depending on how you finish it. Here’s what actually pays back:
- Detached Shop Cost, Permits, and Future Value in Teton Valley — 20-Year Builder Guide (pillar)
- Pole Barn Shop vs Stick-Built Shop in Driggs + Victor — Pros and Cons
- RV Shop / Toy Barn Cost in Jackson Hole + Alta — What It Actually Runs
- 3-Bay Shop with Loft in Driggs — Cost, Permits, and Timeline
- Heated Shop vs Unheated in Teton Valley — Cost, Permits, and 10-Year Value
Home Additions
Additions are where budgets die. They’re also where the smartest money in this valley gets spent — a $180k master suite that adds $260k to the appraisal beats a full tear-down every time, when the bones are good. Here’s the math:
- Home Addition Pros, Cons, Cost, and Permits in Teton Valley — 20-Year GC Guide (pillar)
- Second Story Addition in Driggs — Feasibility, Cost, and What Goes Wrong
- Kitchen + Master Bath Addition in Jackson Hole — Combined-Scope Cost Analysis
- Bump-Out Addition in Rexburg or Rigby — What It Costs and What It’s Worth
- Addition vs Whole Home Remodel vs Tear Down — Which Makes Sense in Teton Valley?
Common Questions Across All Three
What does an ADU, shop, or addition cost in Teton Valley in 2026?
Ballpark ranges: ADU $275–$525/sf finished, detached shop $75–$250/sf depending on heat and finish, home addition $325–$600/sf depending on scope. Jackson Hole runs 15–30% higher across the board. Rigby and Rexburg run 20–35% less. Every one of these has real dollar breakdowns in the linked articles.
How long do permits take?
Teton County ID: 6–14 weeks for a shop, 10–20 for an ADU or addition. Teton County WY (Jackson): 12–24 weeks and more design review. Jefferson (Rigby) and Madison (Rexburg): 3–8 weeks, much simpler. HOA review on top of that if applicable.
What actually adds resale value?
In this valley: heated finished shop space, legal short-term-rentable ADUs (where zoning allows), and additions that fix a missing bedroom or a broken floor plan. Unheated storage shops and awkward bump-outs add the least.
Can I build this from out of state?
Yes — that’s most of our clients. JobTread gives you real-time schedule, photos, budget, and change orders. Fixed-price contracts mean no surprise allowances. We handle every subcontractor, permit, and inspection so you don’t fly in unless you want to.
Do I have to hire a separate architect and structural engineer, or does SwagerBuilds handle that?
We handle both. Design is in-house — same-week revisions, no waiting on an outside firm. Our engineer network (structural, civil, mechanical) is Idaho-licensed and has stamped dozens of our shops and ADUs across Teton Valley. For Jackson-side builds that need a Wyoming stamp, we coordinate with partner engineers licensed in WY. One team owns the whole path from napkin sketch to permit approval.
How fast can plans be revised once we’re underway?
Typical revisions turn same-week. Small ones (window swap, minor wall move) can be same-day. Larger structural revisions that need a fresh engineer calc are usually 1-2 weeks — still much faster than starting a new outside-firm queue from zero.
Ready to talk numbers?
If you’ve got land, a home, or a plan and you want a real number — not a brochure number — start here. We’ll walk your property, price the actual scope, and tell you honestly whether it’s worth building.