14 to 18 months from contract signing to keys in hand. That’s the honest answer for a luxury custom home in Eastern Idaho, whether you’re building in Driggs, Victor, Tetonia, Idaho Falls, Rigby, or anywhere in between. Some builders will quote you 10 months. Some will scare you with 24. The real number, on a real Teton Valley luxury build, is 14 to 18.
This guide breaks down each phase month by month, tells you exactly what’s happening and what should be happening, and flags the four things that cause 90 percent of build delays in Idaho. If you’re early in the process, this is the article that keeps your timeline honest.
How long does it take to build a custom home in Idaho?
14 to 18 months on average for a luxury custom home in Eastern Idaho, from signed contract to move in. Preconstruction, meaning design, permits, and contracts, takes 4 to 6 months. Active construction takes 10 to 12 months. Teton Valley builds tend to run on the longer end because of winter weather and permit timelines.
The 7 Phases of a Custom Home Build
Every well run custom home moves through the same seven phases. The duration of each one is fairly predictable. Where builders blow up timelines is by collapsing or skipping the early phases, then paying for it on the back end.
| Phase | Typical Duration | What’s Happening |
|---|---|---|
| 1. Discovery and Predesign | 1 to 2 months | Site evaluation, budget alignment, builder selection, contracts |
| 2. Design Development | 2 to 3 months | Architect, schematic design, design development, construction drawings |
| 3. Permits and Engineering | 1 to 2 months | Structural engineer, septic design, county permit submission |
| 4. Preconstruction | 1 month | Final budget, subcontractor lock in, materials ordered, lot prep |
| 5. Foundation and Framing | 2 to 3 months | Excavation, foundation, wall framing, roof structure |
| 6. Mechanical and Exterior | 3 to 4 months | HVAC, plumbing, electrical, roofing, siding, windows |
| 7. Finishes and Closeout | 4 to 5 months | Drywall, cabinets, flooring, paint, fixtures, punch list, occupancy |
Total active timeline: 14 to 18 months. If anyone tells you 10 months for a true custom build in Teton Valley, they’re either skipping design phases or planning to apologize later.
Month by Month Breakdown for a Driggs Custom Home
Here’s what a typical 16 month Driggs build actually looks like. The numbers below assume a contract signed in March, which is a smart timing call I explain further down.
- Months 1 to 2 (March and April): Discovery, builder selection, contract signing, lot evaluation, budget alignment.
- Months 3 to 5 (May through July): Architectural design. Concept sketches, then schematic design, then design development. Don’t sign a builder contract before this phase ends.
- Months 6 to 7 (August and September): Construction documents finalized, structural engineering, septic system design, mechanical engineering. Permit application submitted to Teton County.
- Month 8 (October): Permits issued, preconstruction meeting, final material orders, subcontractor schedules locked.
- Months 9 to 11 (November through January): Foundation, framing, roof structure. Yes, we frame through an Idaho winter. The trick is getting under roof before mid December.
- Months 12 to 13 (February and March): Mechanical rough ins, insulation, drywall, siding, exterior trim.
- Months 14 to 15 (April and May): Cabinets, flooring, interior paint, trim, primary fixtures.
- Month 16 (June and July): Final fixtures, exterior finish work, landscaping, final inspection, certificate of occupancy, walkthrough, keys.
The Four Things That Cause 90 Percent of Delays
After more than 20 years of building in Idaho, four problems blow up timelines more than everything else combined. Plan for them up front and your build runs on time.
- Late design decisions. Want to change the kitchen layout in month 12? That’s a 3 to 4 week delay minimum, plus a $15,000 to $30,000 change order. The fix is to lock all design decisions before you break ground.
- Material lead times. High end windows from Marvin, Sierra Pacific, or Loewen are running 16 to 22 weeks in 2026. Custom cabinets are 14 to 18 weeks. If your builder doesn’t order the long lead items the day after permits drop, you’ll lose 6 to 8 weeks waiting.
- Subcontractor scheduling in Teton Valley. The good HVAC, drywall, and tile crews are booked 6 to 9 months out. If your builder doesn’t have those slots locked before construction starts, you’re going to pay rush rates or wait.
- County inspection backlog. Teton County and Bonneville County both run behind in spring and summer. Build an extra 2 to 3 weeks of inspection buffer into your schedule and you won’t get burned.
Should You Start in Spring or Fall?
This is the question every Eastern Idaho client asks me, and the answer surprises most people.
Sign your contract in March or September. Break ground in October or April.
Here’s why. Signing in March puts your active construction starting in October, which means you finish framing and get under roof through the fall, then do interior work all winter when nothing else stops the build. You move in early summer. Best case scenario.
Signing in summer is the worst timing. Permits hit in fall, you break ground in winter, you lose 6 to 8 weeks to weather, and you don’t move in until 18 to 20 months later instead of 14 to 16.
If you’re calling builders right now in May 2026, your realistic target is to break ground in March 2027 and move in around August 2028.
How a Real Driggs Build Stays on Schedule
The Arbogast project we completed in 2025 finished in 15 months, two months faster than the 17 month average for a 3,200 sq ft luxury Driggs build. Here’s exactly how.
- Design lock in by month 4. The owners committed to the layout, kitchen, primary suite, and exterior elevation by the end of design development. We didn’t entertain changes after that point unless they were under $5,000 and didn’t affect a subcontractor schedule.
- Long lead orders placed in week 1 of permitting. Windows were ordered before permits even came back. They arrived right when we needed them.
- Prelocked subcontractor slots. Six months before breaking ground, every major sub had a written slot agreement with deposits.
- Weekly 30 minute owner meetings. Same time every week. Decisions made on the spot. Nothing waits a week for a let me think about it answer.
That’s not magic. It’s just what disciplined custom building looks like.
Common Questions About Build Timelines in Idaho
Can a custom home in Idaho be built in 12 months?
For a true custom home with luxury finishes, 12 months is unrealistic in Eastern Idaho. The exceptions are a smaller build under 2,500 sq ft, a stock plan that skips full architectural design, or a build where the owner is willing to accept builder grade finishes.
Does building in winter slow things down?
Not significantly, if your builder knows what they’re doing. Foundation pours need temperature blankets and accelerator additives. Framing happens fine in cold weather. The trick is getting under roof before the worst storms hit, which is mid December in most years, so you want to start framing by late September.
How long does the design phase take?
For a custom home, plan 4 to 5 months from kickoff with the architect to completed construction documents. Skipping or rushing this phase is the number one cause of expensive surprises during construction.
Do you do design build or work with outside architects?
Both. Design build typically saves 4 to 8 weeks because design and construction are coordinated by one team.
What happens if the build runs over schedule?
In our contracts, schedule overruns that are on the builder, like subcontractor failures or missed deadlines, are on us. Overruns from owner change orders, weather events, or supply chain delays get documented and added to the schedule.
Thinking about your build timeline?
If you’re 6 to 12 months out from breaking ground in Driggs, Victor, Tetonia, Idaho Falls, or Rigby, the timing of your design and contract decisions matters more than almost anything else. We do a free 30 minute call where we look at your timeline, your land status, and the realistic schedule for your build.
Or DM “TIMELINE” to @swagerbuilds on Instagram and we’ll send you our 16 month Teton Valley build calendar template.
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