Category: Process & Timeline

A detached shop in Teton Valley runs $75–$250 per square foot depending on how you finish it, permits in 6–14 weeks through Teton County ID, and — built heated with real electrical and finished walls — adds $85k–$210k to appraised value. Storage-only pole barns add much less.

What Counts as a Shop in Teton Valley?

Anything from a 24×30 pole barn for tractor storage up to a 60×80 heated shop with a mezzanine office, RV bay, and full 200-amp electrical. In Teton Valley the most common builds are 30×40 (three-bay), 40×60 (working shop or 3-bay + RV), and 30×50 with a loft or upstairs living. What you’re storing and whether you plan to work in it drive the entire cost equation.

Pros of a Detached Shop

• Fastest permit path of anything you can build in TV. 6–14 weeks typical.
• Adds real resale value. A heated finished shop pulls a 4–8% price premium and sells the home faster.
• Recreational utility. Boats, sleds, RVs, side-by-sides, trailers — TV homes need shop space and buyers want it.
• Business use. Woodworking, welding, mechanic space — a heated shop lets you work in January.
• Cheaper per sf than any other structure. Pole barn $75–$115/sf, stick-built $135–$225/sf, heated + finished $175–$250/sf.
• Optional living space. Loft, mezzanine, upstairs — flexible future use.

Cons — The Honest Version

• Snow load engineering matters. TV snow load is 65–85 psf depending on elevation. Skimping on framing here costs you the roof.
• Heating a shop in TV isn’t cheap. Radiant floor is $8–$14/sf. Forced air is cheaper to install, punishing to run.
• Concrete cost has run. A slab-on-grade for a 40×60 runs $22k–$38k in 2026 depending on thickness and reinforcement.
• Setback + lot coverage constraints. Teton County ID has both. Big lots ignore it, small lots get bit.
• Insurance goes up. Especially with a lift or welding.
• Unheated shops add less value. Storage only = maybe 40–55% recovery on appraisal.

Shop Cost Breakdown — Teton Valley 2026

40×60 (2,400 sf) heated + finished shop:

• Site prep + gravel + slab: $32,000–$52,000
• Framing (stick or post-frame) + roof: $58,000–$92,000
• Electrical (200-amp service, LED lighting, outlets): $18,000–$32,000
• Heating (in-floor hydronic or wall-mount unit heaters): $22,000–$48,000
• Insulation + interior finish (spray foam ceiling, batts in walls, drywall or steel liner): $28,000–$52,000
• Overhead doors (2 x 12×14 + walk door): $12,000–$22,000
• Exterior finish (metal siding + trim or stick-built lap siding): $22,000–$45,000
• Permits + engineering + design: $6,500–$14,000
• Overhead + contingency: $28,000–$48,000
• Total: $226,500 – $405,000 ($94–$169/sf)

Unheated pole barn 40×60: $135,000–$210,000 ($56–$88/sf).

60×80 heated with loft office: $475,000–$785,000.

Permitting in Teton County, Idaho

1. Zoning + setback + lot coverage check. Ag zones have generous rules, residential zones have real limits.
2. Design (structural, snow load calcs at 65–85 psf, electrical service size).
3. Permit submittal: 4–8 weeks review typical for shops in Teton County ID.
4. Inspections: footing, slab, framing, electrical rough, insulation, final. ~5–6 total.
5. Certificate of occupancy for finished/heated shops.

Jackson (Teton County WY) similar structure but 10–16 weeks and stricter design review on exterior materials.

Future Value — 10-Year Math on a TV Shop

• Heated finished 40×60: $300k build, ~$225k appraisal bump = 75% recovery. Homes with shops sell ~18 days faster on average and pull 4–8% price premium.
• Unheated pole barn: $170k build, ~$85k appraisal bump = 50% recovery. Storage-only shops add less because buyers see them as “utility only.”
• Business use case: Working out of a heated shop instead of renting commercial space at $18–$28/sf/yr in Idaho Falls saves $40k–$65k/yr for a 2,000 sf equivalent.

When a Shop Makes Sense — and When It Doesn’t

Makes sense: you have a real use case (toys, tools, business), lot has room, you’re building heated + finished for resale, and you’re staying 5+ years.

Doesn’t make sense: unheated storage-only on a small lot in a covenanted subdivision (bad ROI), or you’re planning to sell within 24 months (won’t recover the investment on the timeline).

How SwagerBuilds Builds Shops

Fixed-price contract. No allowances that shift the number later. We engineer for TV snow load properly — no shortcuts. JobTread schedule + budget + photos visible to you from Day One. Twenty years of shops in TV means we know which post-frame crews finish clean, which electricians turn service upgrades around fast, and which heating contractors won’t ghost you in January.

FAQ

Pole barn or stick-built in TV?

Pole barn if storage-only. Stick-built if you want it to feel like a shop long-term — better insulation, cleaner finish, higher resale.

Best heating for a TV shop?

In-floor hydronic if you’ll use it daily. Wall-mount propane unit heaters if only occasional.

Can I live in a shop apartment in Teton County ID?

Yes if it’s permitted as a shop-with-ADU. Different permit path than shop-only.

What’s the typical shop timeline?

Permit 6–14 weeks. Build 3–5 months. Total: 6–8 months from contract.

Does a shop hurt resale?

No — in TV a good shop helps. Only exception: massive shop on a small lot in a design-controlled subdivision.

Ready to Price a TV Shop?

Send me the lot and the size + use case. I’ll pull setbacks, price the actual scope, and give you a fixed-price range. Start here.

Related: Pole Barn vs Stick-Built in Driggs + Victor · Heated vs Unheated Shop in TV · Complete Guide

In Teton Valley, an ADU adds more resale value and rental income potential than a home addition of the same cost — but a well-scoped addition wins on daily livability, cost-per-square-foot, and permit speed. Here’s the honest comparison from 20 years of building both.

What’s the Actual Choice in Teton Valley?

You have $250k–$450k to invest in your Teton Valley property. Two paths: build a detached ADU for rental or multi-gen use, OR add onto your existing home for a bigger master, another bedroom, a mudroom, or a great room. Both add value. They add it differently.

Pros — ADU (Detached, 700–900 sf)

• Income potential. $28k–$52k gross/yr STR in the right zone.
• Adds a discrete second asset. Appraiser values it separately.
• Doesn’t touch your main house. No dust, no disruption during build.
• Optionality on sale. Rentable, guest-house, mother-in-law suite — buyers see three uses.
• Multi-gen ready. Full independent unit.

Cons — ADU

• Higher cost per sf ($305–$575/sf) vs addition.
• Eats yard, driveway pull, sightline.
• Septic upgrade risk ($18k–$45k adder).
• 10–20 week permit review in Teton County ID.
• Insurance + property tax bumps.
• STR rules can shift.

Pros — Home Addition

• Lower cost per sf ($325–$500/sf typical) than detached ADU.
• Solves the actual problem. If your master is too small or you need a bedroom, an addition fixes daily life.
• Faster permit. 6–12 weeks in Teton County ID vs 10–20 for an ADU.
• Shares mechanicals. No new HVAC system, no new water heater, no new panel.
• No septic add usually. Same occupant count = same load.
• Cleaner insurance. Just increase the dwelling coverage.

Cons — Home Addition

• Zero rental income. It’s part of your primary residence.
• Live-through-it discomfort. Dust, noise, contractors in your kitchen for 4–6 months.
• Doesn’t add a second asset. Appraisal bump but no separate income use.
• Tie-in surprises. Roof, foundation, and framing tie-ins are where hidden cost lives.
• Design constraints. Has to look like it belongs on the existing house.

Side-by-Side Cost Breakdown — Teton Valley 2026

800 sf Detached ADU:

• Foundation + framing: $85k–$135k
• Mechanicals + utilities: $50k–$95k
• Finishes (interior + exterior): $95k–$155k
• Permits + design + overhead: $45k–$85k
• Total: $275k–$470k

800 sf Home Addition (e.g., master + bath):

• Foundation + tie-in framing: $65k–$105k
• Mechanicals (tie-in): $28k–$55k
• Finishes: $95k–$165k
• Permits + design + overhead: $35k–$65k
• Total: $223k–$390k

Addition wins on price by ~15–20% for equivalent square footage.

Permitting — The Timeline Difference

In Teton County Idaho: ADU permit runs 10–20 weeks (design review, zoning check, septic review, energy compliance). Home addition runs 6–12 weeks (envelope + structural + mechanical review, no separate zoning process if within setbacks). HOA overlay adds 2–8 weeks either way.

Future Value — 10-Year Math

• $350k ADU in Driggs/Victor: ~$28k/yr net STR = $280k over 10 years + $255k appraisal bump = ~$535k total.
• $300k addition (master + bath) in Driggs/Victor: 0 rental income + $255k appraisal bump = $255k total. But you got 10 years of a better master.

ADU wins on financial return. Addition wins on lifestyle return.

When Each Wins

ADU wins if: your zone allows STR, you have lot area, and financial return is why you’re investing.

Addition wins if: your existing home has a specific problem (too small master, no mudroom, need a bedroom), you can’t STR, your septic can’t handle a second unit, or your lot won’t fit a detached structure.

How SwagerBuilds Handles the Decision

We price both scenarios before you commit. Fixed-price on whichever you pick. JobTread dashboard so you see the schedule and budget from Day One. Twenty years of building both in TV means we know which lots favor one over the other — and we’ll tell you if neither actually pencils out.

FAQ

Which adds more appraised value in Teton Valley?

Detached ADU typically — appraisers treat it as an income asset.

Which is faster to build?

Addition. 4–6 months vs 6–9 for ADU.

Can I do both?

Yes, and some owners do. Usually sequential, not parallel.

Does an addition need septic review?

Only if bedroom count increases. Otherwise no.

Which One Wins on Your Property?

Send me the parcel and the scope you’re considering. I’ll price both and tell you which one wins on your lot. Start here.

Related: ADU Cost in Teton Valley (pillar) · Home Addition Guide (pillar) · Complete Guide

Building an ADU in Rigby or Rexburg is cheaper, faster, and simpler than Teton Valley — typically $215–$385/sf, 3–8 weeks to permit through Jefferson or Madison County, and multi-gen use cases beat rental economics here. Different math than an ADU in Driggs or Jackson.

ADUs in Eastern Idaho — Different Play Than Teton Valley

Rigby (Jefferson County) and Rexburg (Madison County) both allow ADUs, but the rental math looks nothing like Teton Valley. Nightly STR rates are lower, occupancy is lower, and the primary reason to build here is multi-generational housing, adult kids, workforce housing, or long-term rental — not Airbnb income. That changes the whole design equation.

Worth noting for out-of-town readers: Rigby and Rexburg are about 1.5 hours from Teton Valley over Pine Creek Pass. A lot of our clients own homes here and vacation property in TV — the ADU decision often ties to which side of that pass you’re building on.

Pros of an ADU in Rigby or Rexburg

• 30–40% cheaper to build. Labor rates, land, permits — all lower than TV.
• Fast permitting. 3–8 weeks in Jefferson and Madison vs. 10–20 weeks in Teton County ID.
• Family use cases work. Multi-gen, aging parents, married adult kids, LDS mission kids coming home — the demand is real and steady.
• BYU-I student rental demand. Rexburg specifically has consistent long-term rental demand at $850–$1,400/month for a 1BR ADU.
• Larger lots. Rural parcels here often have 1–5 acres, so setback constraints are less punishing.
• Simpler code path. No design review board, no HOA in most areas.

Cons — The Honest Version

• STR economics don’t work. Nightly rates $75–$135, low occupancy — don’t build for Airbnb here.
• Lower appraisal value bump. ADUs in this market recover 55–70% of build cost vs 70–85% in TV.
• Long-term rental yields are modest. $10k–$17k/yr gross for a 1BR is the ceiling.
• Well + septic on rural parcels. If you’re outside city water/sewer, ADU adds septic load — could trigger upgrade.
• Winter access on rural roads. Snow plowing, mud season — real considerations for tenant access.

Cost Breakdown — Rigby / Rexburg 2026

800 sf detached ADU:

• Foundation + site: $24,000–$42,000
• Framing + roof: $38,000–$62,000
• Mechanicals: $32,000–$55,000
• Interior finishes: $38,000–$68,000
• Exterior finishes: $28,000–$45,000
• Utilities + septic: $6,000–$32,000
• Permits + design: $4,500–$9,500
• Overhead + contingency: $22,000–$36,000
• Total: $192,500 – $349,500

Attached ADU or basement conversion typically runs 20–35% less.

Permitting — Jefferson vs Madison County

Jefferson County (Rigby): ADU permitted through the county building department. Setbacks per zone (25′ front, 8′ side, 25′ rear in most residential zones). Well and septic reviewed by Eastern Idaho Public Health if rural. Permit review 3–6 weeks typical.

Madison County (Rexburg): Rexburg city allows ADU with some zone limits — check R-1 vs R-2 specifically. County is simpler. Rexburg has an active BYU-I housing rental market so ADU permitting is well-worn. Permit review 4–8 weeks.

Future Value — What It Adds

• Rexburg long-term rental: $1,100–$1,400/mo for a 1BR ADU near BYU-I. $13k–$17k/yr gross.
• Rigby long-term rental: $900–$1,250/mo. $11k–$15k/yr gross.
• Appraisal bump: $130k–$210k on a $270k ADU build.
• Multi-gen value: Harder to quantify but real — you’re solving a family housing problem without building a second home.

Compare to Teton Valley: same $270k build in Driggs would appraise closer to $210–$260k and gross $32k+/yr STR. Different market, different math.

When It Makes Sense — and When It Doesn’t

Makes sense: multi-gen family use, BYU-I student rental (Rexburg), you own a large parcel and want a guest house / mother-in-law suite, or you’re planning to work in TV and want a base closer to Idaho Falls medical/shopping.

Doesn’t make sense: STR-only rental play, tight lot where the ADU eats yard for no upside, or if you’re within 20 miles of the Snake River and flood/soil review will double your foundation cost.

How SwagerBuilds Handles Rigby + Rexburg ADUs

We’re based in Rigby — 4th generation. We’ve built ADUs across Jefferson and Madison counties for family, students, and long-term rental. Fixed-price contract, no surprise allowances. JobTread schedule and budget visible to you from Day One. If you also own a lot in Teton Valley and want to weigh both, we can quote both. Twenty years means we know the local plans examiners by first name and the septic engineers who turn things around fast.

FAQ

What’s the ADU permit timeline in Jefferson County?

3–6 weeks typical. Full build 4–6 months.

Can I STR an ADU in Rexburg?

Zones vary. Long-term rental to BYU-I students is where the money is.

Do I need a separate septic for a rural Rigby ADU?

Depends on existing capacity. Eastern Idaho Public Health reviews.

How does Rigby ADU cost compare to Driggs?

Rigby runs 30–40% less for the same scope.

Is Rexburg ADU rental steady year-round?

School-year yes. Summer thinner — many students leave. Plan accordingly.

Ready to Price Your Rigby or Rexburg ADU?

Send me the parcel and rough scope. I’ll pull county setbacks, check septic, and give you a fixed-price range. Start here.

Related: ADU Cost in Teton Valley (pillar) · Complete Guide · Custom Home Builder in Rigby

A permitted STR ADU in Jackson Hole grosses $52k–$95k a year. In Victor, $28k–$48k. Net after expenses, you’re keeping about 60–70% of that. Here’s what owners in each town actually earn, what it costs to build, and what breaks the numbers.

Why Jackson + Victor ADU Rental Math Works

Jackson has three constraints working in an ADU owner’s favor: hotel supply is capped, land is basically finite, and demand is year-round — Teton Village winter, national park summer, shoulder-season conference and wedding traffic. Victor sits 25 minutes over Teton Pass and captures the spillover: guests who couldn’t afford Jackson, plus the growing Grand Targhee ski market. Both towns support rental ADUs. Rules differ.

Pros — ADU Rental Income in Jackson + Victor

• Year-round demand. Rare in mountain markets. Jackson has 4 real seasons of visitor demand; Victor has 2 strong (winter + summer) and 2 acceptable (spring, fall).
• Nightly rates hold up. Jackson averages $310–$525/night in season for a nice 1BR ADU. Victor averages $185–$285.
• Occupancy is strong. 68–82% in Jackson, 55–70% in Victor — well above US STR average.
• Corporate + wedding markets. Jackson has recurring corporate retreat and wedding overflow business — predictable multi-night bookings at premium rates.
• Exit optionality. If STR rules tighten, you pivot to long-term rental or workforce housing — both undersupplied.

Cons — What Kills the Math

• Jackson STR permitting is tightening. Not everywhere allows STR, and enforcement is increasing. Zoning check FIRST.
• Management costs eat into net. Professional STR management in Jackson runs 22–32% of gross. In Victor, 18–25%. If you self-manage remotely, plan for 8–12 hours/week.
• Cleaning turnover is expensive. $135–$225 per turn in Jackson, $85–$150 in Victor. Fast turnover destroys margin.
• Property tax growth. Both markets are seeing 6–12% annual assessed value bumps. Plan for it.
• Insurance for STR is different. Standard homeowners doesn’t cover — STR-specific policy runs $2,200–$4,800/year.
• Slow seasons still exist. April in Victor is dead. Plan cash flow for it.

Cost — Building the ADU (Jackson vs Victor)

Jackson Hole (Teton County WY) — 800 sf detached ADU:

• Site + foundation: $48,000–$78,000
• Framing + roof: $68,000–$105,000
• Mechanicals: $58,000–$92,000
• Interior finishes: $85,000–$155,000
• Exterior + windows: $55,000–$92,000
• Utilities + septic: $18,000–$62,000
• Permits + design + review: $18,000–$38,000
• Overhead + contingency: $45,000–$78,000
• Total: $395,000 – $700,000

Victor (Teton County ID) — 800 sf detached ADU:

• Total: $285,000 – $475,000 (same scope, Victor labor and permits).

Permitting for Rental ADUs

Jackson (Teton County WY): ADU allowed in specific zones with STR requiring an additional short-term rental permit. Design review is real — exterior materials and mass will be reviewed. Permit + STR approval: 16–28 weeks total.

Victor (Teton County ID): ADU allowed under the accessory dwelling ordinance. Some Victor zones allow STR by right, others by conditional use permit. Permit: 8–14 weeks.

In both towns, HOA overlay rules can override town/county rules for STR — check your CC&Rs before you spend a dime on design.

Real Rental Income — What Owners Earn

Jackson Hole — 1BR/1BA detached ADU, 800 sf, nice finishes:

• Peak season (Dec–Mar, Jun–Sep): $385–$525/night
• Shoulder (Apr–May, Oct–Nov): $195–$285/night
• Occupancy: 72–80%
• Gross annual: $58,000–$92,000
• Expenses (management, cleaning, utilities, insurance, taxes, maintenance): $22,000–$34,000
• Net annual: $36,000–$62,000

Victor — 1BR/1BA detached ADU, 800 sf, nice finishes:

• Peak season: $195–$285/night
• Shoulder: $115–$165/night
• Occupancy: 58–68%
• Gross annual: $32,000–$48,000
• Expenses: $12,000–$18,000
• Net annual: $20,000–$32,000

10-Year Future Value

• Jackson $500k ADU: ~$45k/yr net = $450k over 10 years, plus ~$400k appraisal bump. Total ~$850k on $500k. Not counting appreciation.
• Victor $360k ADU: ~$26k/yr net = $260k over 10 years, plus ~$280k appraisal bump. Total ~$540k on $360k.

When It Makes Sense — and When It Doesn’t

Makes sense: STR-permitted zone, lot has room, you can hold through a slow year, and you’re okay with an 18–30 month total timeline in Jackson (10–16 in Victor).

Doesn’t make sense: Zone doesn’t allow STR, HOA blocks it, cash-flow-tight financing that can’t absorb April in Victor, or you don’t want to hire management.

How SwagerBuilds Handles Rental ADU Builds

We build rental ADUs with the STR requirements engineered in from Day One — separate address, keyless entry infrastructure, insulation for sound between units, wear-tolerant finishes, laundry sized for turnover. Fixed-price contract, no allowances. JobTread dashboard for you to watch from Jackson, Denver, or wherever. Twenty years in this valley means we know which zones fight you on STR and which welcome it.

FAQ

What’s the average ADU rental income in Jackson Hole?

$58k–$92k gross, $36k–$62k net for a well-finished 800 sf STR ADU.

Can I self-manage an STR from out of state?

Yes with a local cleaner and remote lock/messaging tools — saves 22–32% management fee but takes 8–12 hours/week.

What’s ADU occupancy in Victor?

58–68% year-round with proper listing management.

Is Jackson still permitting new STR ADUs?

In some zones yes, others no. Rules are moving — zoning check upfront is essential.

How does STR insurance work?

Separate STR policy, $2,200–$4,800/yr. Standard homeowners will not cover.

Want a Real Rental Income Number for Your Lot?

Send me your parcel + rough scope. I’ll check STR eligibility, run projections against comps, and price the build. Start here.

Related: ADU Cost + ROI in Teton Valley (pillar) · Complete Guide · Airbnb ROI in Teton Valley