How Much Does an ADU Cost in Utah? The 2026 Fixed-Price Breakdown
Ask three Utah contractors what an ADU costs and you'll get three shrugs and a "well, it depends." Here's the answer with actual numbers — because Arena publishes its pricing: a fixed $175 per square foot, turn-key.
The short answer: $128,625 to $385,875, fixed
Every Arena ADU is priced at $175 per square foot, and that number is locked before the first shovel hits dirt — design, permits, site work, and the full steel-built Arena Standard included. No allowances, no change-order roulette. Across the seven plans:
The Compact — $128,625
735 sq ft · 2 bed · 1.5 bath · the lowest-cost complete backyard home.
The Super Garage — $147,000
840 sq ft apartment over a 3-car garage.
The Loft — $167,125
955 sq ft · 3 bed · 3 bath across a main + loft level.
The Entertainer / The Apartment Upgrade — $210,000
Both 1,200 sq ft two-story plans — one trades a bedroom for a roof deck.
The American Dream — $257,250
1,470 sq ft · 5 bed · 4 bath · a complete family home.
The Investor Triplex — $385,875
2,205 sq ft · three self-contained units on one foundation.
Why "it depends" is usually true — and why it isn't here
Traditional ADU quotes float because stick-built construction passes every surprise through to you: lumber repricing mid-build, subcontractor overruns, weather damage to exposed framing, and the classic 10–20% "contingency" that always gets spent. Since 2020, construction materials have run roughly 40% more expensive and borrowed money costs about twice as much — which is exactly why open-ended quotes have gotten scarier.
Arena's homes are panelized cold-formed steel, cut to the millimeter in a factory and assembled on site in weeks. Factory precision is what makes a locked price possible: when the parts can't warp, rot, or get re-cut on site, the labor doesn't balloon — so the quote doesn't either.
What "turn-key" actually includes
The $175/sq ft covers design, engineering, permits, foundation and site work, the steel structure with waterproof MgO floors, continuous insulation and high-performance double-pane windows, all-electric mechanicals with instant hot water at every bath, finishes, and final inspections. The number on your contract is the number you pay.
The other half of the math: what it pays back
Wasatch Front comparables put Arena plans between $1,400 and $2,850 a month in long-term rent. On the Compact, that's roughly $16,800 a year against a $128,625 build. For the full rent-vs-payment math, read the Utah house-hacking playbook — or skip the reading and run your own lot through the 3-minute estimator.
Get your number
An Arena advisor runs your address, your goal, and your budget — and calls back with a fixed price and a floorplan that fits.
Have an advisor call me →Keep reading
The Arena Way: Why We Engineer Every Wall on Purpose
Most homes are assembled from whatever came off the truck. An Arena home is engineered — every wall, panel, and system chosen on purpose. Here's the difference that makes.
Your Roof Is a Deck: The Rooftop Living Space on Every Arena Home
Most homes waste their roof on a dead attic. Every Arena home turns it into a warm, protected rooftop deck — hundreds of square feet of outdoor living at a fraction of indoor cost.
How to Finance an ADU in Utah: 5 Ways to Pay for a Backyard Home
HELOC, cash-out refi, renovation loan, home-equity loan, or cash — the five ways Utahns fund an ADU, when each makes sense, and how the rent and a fixed price change the math.
How Long Does It Take to Build an ADU in Utah?
Two clocks decide your timeline: permitting and construction. Here's a realistic schedule for a Utah ADU — and why a steel, factory-built Arena home goes up in weeks, not a year.
The ADU Tax Play: Cost Segregation & Depreciation on a Rental Backyard Home
A rental ADU isn't just income — it's a depreciable asset. Here's how cost segregation can accelerate the deductions, in plain English, and why CPAs love the move.
Building an ADU for Aging Parents: The Utah Multigenerational Home
Keep family close without giving up privacy — or paying for assisted living. Here's how a single-level, accessible backyard home works for aging parents in Utah.
What Does “$175 a Square Foot, Turn-Key” Actually Include?
“Starting from” pricing hides the real number. Here's exactly what Arena's fixed $175/sq ft covers — design, permits, site work, structure, mechanicals, finishes — and why it can be locked.
You Inherited Land in Utah. Here's How to Actually Develop It.
A quarter acre, a half acre, family land you weren't expecting — most people freeze at step one. Here's the real path from a raw Utah lot to a finished, income-producing home.
Why New Homes Got So Expensive — and What Actually Fixes It
It isn't just lumber. Every link in the chain found a way to win, and the homeowner is the one who didn't. Here's what really happened to the price of a house — and the fix.
How an All-Electric Utah Home Stays Warm at -13°F
No furnace, no gas line, no mechanical room — just cold-climate heat pumps rated to -13°F. Here's the building science behind an all-electric Arena home, and what it does to your bill.
New Home vs. Existing Home in Utah: Which Actually Costs Less?
Sticker price says one thing; the real math says another. We compare new construction to an existing Utah home honestly — repairs, efficiency, and what a fixed-price build changes.
Utah ADU Laws in 2026: What Homeowners Need to Know Before They Build
A plain-English guide to Utah's ADU rules in 2026 — what state law allows, where cities differ, and how permitting actually works for a backyard home.
Steel vs. Wood Framing: Why Arena Builds Every Home with Cold-Formed Steel
Cold-formed steel vs stick framing, honestly compared: fire, water, mold, termites, straightness, speed — and what it means for your home's value.
House Hacking in Utah: Turn Your Backyard Into $1,400–$2,850 a Month
The complete Utah house-hacking playbook: which ADU plans rent for what, how the financing math works, and what a realistic month looks like.