A custom home builder in Driggs or Victor typically bills one of two ways in 2026: fixed-price (locked number before contract, no allowances) or cost-plus (actual cost plus a 15-25% GC margin). Locals building here in the last 5 years overwhelmingly regret cost-plus. Here’s what each contract type actually costs and why fixed-price wins for anyone building in Teton Valley on a real budget.
[Photo placeholder: SwagerBuilds Driggs custom home under construction — framing stage]
What Do Custom Home Builders Charge in Driggs and Victor?
Fixed-price total: $340-$620 per sq ft in Driggs, similar in Victor. That’s the all-in number — GC margin, subs, materials, permits, everything.
Cost-plus: quoted as “estimated cost” plus 15-25% GC margin. The estimated cost gets marketed as $280-$450/sq ft to look competitive, but the final number lands 20-60% higher than that estimate by the time surprises, allowances, and change orders shake out.
Real math on cost-plus: builder quotes “estimated $1.2M plus 20% margin.” You sign at $1.44M expected. Final invoice: $1.9M-$2.1M. That’s not a boutique horror story — that’s the average outcome on Teton Valley cost-plus in the last 5 years.
Why Does Cost-Plus Always Go Over?
Three structural reasons. One: the estimate has allowances. “Cabinet allowance $60K” but you pick custom at $110K = $50K over. Multiply across 8-10 allowance line items. Two: the GC has no incentive to control cost — every dollar spent generates their margin, so pricier subcontractors and premium materials happen. Three: change orders are billed at cost plus the same margin, and there are always change orders on custom homes.
The GC didn’t cheat you. The contract structure did. Cost-plus incentives are backwards — the GC wins when the project costs more. Twenty years watching budgets blow up in this valley says fixed-price is the only contract structure aligned with the client’s interests.
Why Do Some Driggs Builders Only Offer Cost-Plus?
Two reasons. Real reason: fixed-price requires 6-10 weeks of pre-construction work before a contract is signed. Most GCs can’t afford to invest that time on a job that might not close. Fake reason: “Every job has surprises so we can’t quote fixed-price.” That’s a signal they don’t do proper pre-construction inspection.
Any GC who won’t quote fixed-price is telling you they don’t want to be accountable for the number.
What Should a Real Fixed-Price Contract Include?
Every SKU. Every subcontractor bid. Every permit and inspection fee. Every dumpster and porta-potty rental. Every hour of framing labor. Every plumbing fixture, cabinet door style, tile SKU, appliance model number, and paint color specification. If it’s in the drawings, it’s in the price. No allowances. No “TBD.” No “we’ll figure it out during construction.”
Change orders are still possible — if you decide mid-build to upgrade the range or add a wine fridge, that’s a change order priced transparently and approved before work. The base contract stays intact.
How Long Does a Real Pre-Construction Take?
6-10 weeks for a custom home. Site walk, geotech if needed, architectural design refinement, structural engineering, mechanical planning, envelope engineering, product selection sessions with the client, subcontractor pricing walks, permit prep, fixed-price contract assembly.
Pre-construction fee: typically $8K-$25K depending on complexity. Applied against the contract if you sign, refundable minus expenses if you walk. Non-negotiable for a builder committed to fixed-price.
What Does JobTread Transparency Mean?
Every invoice, every subcontractor payment, every change order, every schedule shift visible in your client portal in real time. You see the budget line-by-line. You see cash in vs cash out. You see where every dollar goes on the day it goes there. Not at a monthly meeting — the day it happens.
That’s what “JobTread transparency — every dollar, every day” means. It’s the difference between a client who feels informed and a client who feels helpless.
How Do I Compare Driggs and Victor Custom Home Builders?
Ask three questions. Do you quote fixed-price? Do you do 6-10 weeks of real pre-construction before contract? Can I see your project management system (JobTread, Buildertrend, CoConstruct) with actual client data? Any “no” is a red flag.
Then call three references from finished builds in the last 24 months and ask: did the final price match the contract? How were change orders handled? Would you use this builder again?
How Do I Get a SwagerBuilds Fixed-Price Quote?
Intake at swagerbuilds.com/start. Site walk, pre-construction, fixed-price contract in 8-12 weeks. See how pricing works and the full process.
Frequently Asked Questions
What do custom home builders cost in Driggs?
Fixed-price $340-$620/sq ft depending on spec. Cost-plus starts lower but finishes 20-60% higher than estimate on average.
What’s the difference between fixed-price and cost-plus?
Fixed-price locks the total number before contract. Cost-plus bills actual cost plus a 15-25% GC margin.
Why do cost-plus builds go over budget?
Allowances, misaligned incentives, and change order markup. Structural to the contract type, not the builder.
How long is real pre-construction?
6-10 weeks for a custom home. Fee: $8K-$25K depending on complexity.
Can I see the budget in real time?
Yes with SwagerBuilds. JobTread client portal shows every invoice, every payment, every schedule shift live.
Ready for a Real Fixed-Price Custom Home Quote?
4th-gen Rigby builder. Fixed-price. No allowances. JobTread transparency. Start your Driggs or Victor custom home here.
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