SwagerBuilds LLC · 4510 E 168 N, Rigby, ID 83442 · (208) 520-0636

Author: Bryce Swager

  • Detached Shop Cost, Permits, and Future Value in Teton Valley — 20-Year Builder Guide

    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).

    Building a shop from out of state? Half our shop clients live somewhere else. JobTread photos, budget, schedule — you see the same dashboard we do. Here’s how remote owners run it.

    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

  • Whole Home Remodel in Driggs, ID — Fixed-Price Cost, Scope, Timeline (2026)

    A whole home remodel in Driggs, ID runs $250–$600 per square foot in 2026 depending on how much you take back to studs, mechanical replacement, and finish level. A 3,000 sq ft gut renovation typically lands between $750K and $1.6M. Timeline: 6-14 months from demo to move-in.

    Whole Home Remodel in Driggs — What You’re Actually Buying

    Teton Valley’s civic hub, 6,110 ft elevation, 45 minutes over the pass to Jackson. Driggs median residential sits over $1.1M as of 2026. Most of our Driggs clients own from out of state and drop in a few times a year. Climate matters here: 100+ inch snow years, 60mph wind exposure on the west slope, subzero cold snaps. And the permit path runs through Teton County ID Planning + design review — expect 4-6 months of pre-construction runway.

    Driggs is Teton Valley proper. Most owners we build for here fly in from California, Colorado, Washington, or Jackson. The build has to run without them on site.

    What Does a Whole Home Remodel Cost in Driggs?

    A whole home remodel in Driggs in 2026 runs $250 to $600 per square foot. The range depends on how far you take it back — cosmetic refresh, gut renovation, or gut plus mechanical replacement plus layout changes. A 3,000 sq ft home taken to studs and rebuilt: $750K to $1.6M. That’s the honest number for Driggs right now.

    Sample Driggs Whole-Home Remodel Ranges

    • Cosmetic-plus (paint, floors, kitchen, primary bath, no layout changes): $250K-$450K
    • Mid-scope gut renovation (all baths, kitchen, mechanical partial): $500K-$1.1M
    • Full gut to studs (new mechanical, layout changes, exterior work): $750K-$1.6M+
    • Historic-preservation-level restoration: $1.2M+

    When Does a Whole Home Remodel Beat a New Build in Driggs?

    Three scenarios. One: the lot is irreplaceable — a view lot in Driggs that you’d never find again. Two: the existing envelope has structural bones worth keeping and the layout just needs to be cut and re-plumbed. Three: you own free-and-clear and the tear-down-plus-build number crosses $1.5M for a house you’d otherwise buy for $900K.

    The scenarios where a remodel loses: foundation failure, radical layout changes that require moving structural walls, mechanical systems 40+ years old with knob-and-tube wiring.

    Building from out of state?

    Most of the owners we build for don’t live here. California, Colorado, Washington, Jackson second-home owners — they see the build through JobTread, not from a truck. Daily photo logs, weekly video walkthroughs, on-demand FaceTime tours, every dollar visible in real time. Site visits are optional, not required. Here’s how our remote-owner clients monitor their build without flying in.

    How the Whole Home Remodel Process Runs in Driggs

    Every SwagerBuilds whole home remodel runs the same six-stage process. Consult, planning, contract, build, punch, warranty. You watch the whole thing through JobTread — daily photo logs, all cost detail, written change orders.

    Timeline for Driggs: 6-14 months from contract to punch. Weather delays get logged. Change orders get logged.

    Why Fixed-Price Matters in Driggs

    Cost-plus contracts are the most common way Driggs owners get burned. The builder starts the job at $600K, and by month six it’s $1.1M because “materials moved.” Fixed-price contracts flip that dynamic. Every SwagerBuilds contract is fixed-price, no allowances. Every change order is written and approved before it costs a dollar.

    What Makes Driggs Whole-Home Remodels Different

    Climate. 100+ inch snow years, subzero cold, pass wind. Wall assemblies, roof detailing, mechanical sizing — everything has to answer. A generic remodel spec written for a mild coastal market will fail in Driggs within five winters.

    What Can Go Wrong on a Whole Home Remodel in Driggs?

    Three failure modes. Owner signs cost-plus and watches the number climb from $600K to $1M with no ceiling. Owner skips the pre-demo assessment and gets hit with foundation, mechanical, or structural surprises. Owner picks a builder who’s never done a full gut in Driggs climate — wall assembly, air barrier, and mechanical spec don’t hold up.

    The fix: fixed-price contract with no allowances. Full pre-demo assessment. Climate-correct wall assembly with continuous exterior insulation, sealed WRB, proper air barrier.

    Whole Home Remodel vs Tear-Down and Rebuild in Driggs?

    Keep the existing shell when the foundation is sound, structural bones work, and the lot is expensive or view-critical. Tear down when the foundation is compromised, the layout requires moving all load-bearing walls, or you can rebuild for less than 130% of the remodel number.

    Living Through a Whole Home Remodel in Driggs?

    For full gut renovations, most owners move out for the duration. For our out-of-state and Jackson clients, that’s not a factor — they weren’t living there in the first place. Trying to live through a gut renovation almost always ends badly.

    Frequently Asked Questions

    How much does a whole home remodel cost in Driggs?

    $250-$600 per square foot in Driggs in 2026. A 3,000 sq ft gut renovation runs $750K-$1.6M.

    How long does a whole home remodel take?

    Six to fourteen months from demo to move-in.

    Do I need to move out during the remodel?

    For a full gut: yes. Most owners move out.

    What’s the difference between fixed-price and cost-plus?

    Fixed-price is one signed number for full scope. Cost-plus adds percentage on top with no cap.

    Related guides:

    Ready to Talk About Your Whole Home Remodel in Driggs?

    Here’s how this works. Book a 15-minute planning call. Free. No commitment. Twenty years in this valley — I don’t need to sell you something that doesn’t work.

    — Bryce Swager, 4th-generation Rigby builder

    Book a 15-minute planning call →

  • ADU vs Home Addition — Which Adds More Value in Teton Valley?

    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.

    Weighing this from out of state? We help remote owners decide between ADU vs addition on their TV property all the time — site walk, priced comparison, honest recommendation. Here’s how remote owners run it.

    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

  • Detached Shop Cost in Rexburg, ID — 20-Year Builder Breakdown

    A detached shop in Rexburg, ID runs $55–$160 per square foot finished in 2026, depending on wall height, door count, insulation, and whether you add living quarters. A 40×60 uninsulated post-frame runs $130K–$200K. A 40×80 insulated shop with an RV bay and small living quarters can hit $500K-plus. Timeline: 3-7 months.

    Detached Shop in Rexburg — What You’re Actually Buying

    College town anchored by BYU-Idaho, family-heavy, 30 minutes north of Idaho Falls — that’s the setting. Rexburg’s residential stock skews newer than Idaho Falls but the older neighborhoods around 2nd E and 12th W hide great remodel candidates. Climate matters here: high desert, 4,865 ft elevation, wind exposure, real winter. And the permit path runs through Madison County + City of Rexburg — clean permit process, snow-load requirements matter. Any detached shop you plan here has to answer for all three.

    Rexburg families and BYU-Idaho staff make up most of our Rexburg work — plus a growing number of Teton Valley owners who commute from a Rexburg base when they want an easier winter drive. That matters for how we schedule and communicate — the same JobTread logs, weekly video walkthroughs, and written change orders run for the local guy and the owner watching from a laptop in San Francisco.

    What Does a Shop Actually Cost in Rexburg?

    The honest answer starts with what you’re building. A basic 30×40 uninsulated post-frame with two overhead doors and a slab runs $75K-$120K in Rexburg today. Same shop insulated with radiant tubes in the slab and a min-split for heat: add $40K-$60K. Add an RV bay with a 14-foot door and 200-amp panel: another $30K-$45K. Living quarters — real full kitchen, bath, laundry, bedroom — pushes you into barndominium territory and $300K-$600K+ depending on finish.

    Sample Rexburg Shop Ranges (2026)

    • 30×40 basic post-frame: $75K-$120K
    • 40×60 insulated shop, radiant slab: $180K-$260K
    • 40×80 shop with RV bay + small living quarters: $325K-$500K
    • Full barndominium (shop plus permanent residence): $500K-$1M+

    Fixed-price, no allowances. That’s how I write shop contracts. Post-frame material pricing swings weekly but you shouldn’t have to eat that swing after you sign. My contract locks the number before dirt moves.

    Post-Frame vs Stick-Frame vs Steel — Which Wins in Rexburg?

    Post-frame (pole barn) is the volume champion for shops in Idaho. Faster, cheaper per square foot at large clear spans, and the snow-load engineering here is well-understood. Stick-frame wins when you want the shop to match a house — better for barndominiums and shouses because the finish detail is cleaner. Red-iron steel makes sense over 60 feet clear span or when the shop needs monorail cranes and industrial loads.

    Rexburg climate — high desert, wind exposure, real winter — pushes the answer toward insulated post-frame or stick-frame. Uninsulated steel sweats in shoulder season.

    Building from out of state?

    Most of the owners we build for don’t live here. California, Colorado, Washington, Jackson second-home owners — they see the build through JobTread, not from a truck. Daily photo logs, weekly video walkthroughs, on-demand FaceTime tours, every dollar visible in real time. Site visits are optional, not required. Here’s how our remote-owner clients monitor their build without flying in.

    How the Detached Shop Process Runs in Rexburg

    Every SwagerBuilds shop runs the same six-stage process. Consult, planning, contract, build, punch, warranty. Nothing skipped, nothing hidden. You watch the whole thing through JobTread — daily photo logs, all cost detail, written change orders that require your approval before a dollar moves.

    Timeline for Rexburg: 3-7 months. That’s from contract signature to punch list complete, assuming permits move on standard Madison County + City of Rexburg timelines.

    Why Fixed-Price Matters in Rexburg

    Cost-plus contracts are the most common way Rexburg owners get burned. The builder starts the job at $150K, and by month five it’s $220K because “materials moved.” Fixed-price contracts flip that dynamic. I do the discovery work up front and I price the whole scope before I ask you to sign. Every SwagerBuilds contract is fixed-price, no allowances. Every change order is written and approved before it costs a dollar.

    What Makes Rexburg Detached Shops Different

    Rexburg gets serious wind. Shop envelope has to be engineered for it. Wall assemblies, roof detailing, mechanical sizing — everything has to answer. A generic shop spec written for a mild coastal market will fail here within five winters. I’ve seen every way a build goes sideways when the spec came from somewhere else.

    What Can Go Wrong on a Shop Build in Rexburg?

    Three mistakes I see over and over. Owner picks the cheapest post-frame quote from a kit dealer without stamped engineering — then the county rejects the permit or the roof loads short-cycle on the first hundred-inch snow year. Owner skips the insulation and vapor barrier because “it’s just a shop” — then spends every winter chasing condensation on the underside of steel roofing. Owner adds living quarters as an afterthought — no permit, no residential mechanical, no code compliance — and can’t insure it or resell it as a legal dwelling.

    The fix: stamped engineering from day one. Insulation and vapor detail spec’d like a house from day one. Living quarters permitted as a residence from day one.

    What About Barndominium Builds in Rexburg?

    A barndominium is a shop with permanent living quarters inside. Same envelope, same slab, same overhead doors — but with a code-compliant residence built in. In Rexburg we build barndos on both post-frame and stick-frame chassis. Post-frame goes up faster and costs less per square foot. Stick-frame finishes cleaner and reads more like a house from the exterior.

    Barndo ranges in Rexburg: $185-$375 per square foot finished depending on layout and finish level. Full details on the Idaho barndominium builder page.

    Financing a Rexburg Shop Build

    Most owners finance shop builds through construction loans that convert to a mortgage or a fixed-term note at completion. Idaho Central Credit Union, Zions Bank, and D.L. Evans are the three lenders we work with most in Rexburg. They understand rural detached-structure builds.

    Frequently Asked Questions

    How much does a 40×60 shop cost in Rexburg?

    A 40×60 insulated shop with a slab and two overhead doors in Rexburg runs $180K-$260K in 2026.

    Do I need a permit to build a shop in Rexburg?

    Yes for anything over 200 sq ft in most cases. Ag exemptions can apply on qualifying parcels. Madison County + City of Rexburg is the permit path.

    How long does a shop build take?

    Three to seven months from contract to final for a standard Rexburg shop.

    Can I finance a shop build?

    Yes — most local Idaho banks offer detached-structure construction loans.

    Related guides:

    Ready to Talk About Your Detached Shop in Rexburg?

    Here’s how this works. Book a 15-minute planning call. Free. No commitment. We talk through what you want, the budget you’re working with, and whether SwagerBuilds is the right fit. Twenty years in this valley — I don’t need to sell you something that doesn’t work.

    — Bryce Swager, 4th-generation Rigby builder

    Book a 15-minute planning call →

  • Building an ADU in Rigby or Rexburg — Permits, Setbacks, and the Eastern Idaho Path

    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.

    Own property in both Eastern Idaho and Teton Valley? We build in both markets. If you’re weighing an ADU on your Rigby property vs on your Driggs cabin lot, we can price both. Remote owner monitoring works either way.

    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