ADU cost
The price is the component build-up: footprint, living level, sleeping levels, loft, deck and garage. Collection plans are quoted on your lot. Build your own prices a custom mix from the same engine, and the ADU calculator puts cost, rent and the lot check on one page.
| Plan | Sq ft | Build price | Est. rent / mo |
|---|---|---|---|
| AH-01 · The Lookout 2 bed · 1.5 bath · 1 story + roof deck | 784 | Request a quote | $1,400 |
| AH-02 · The Encore 2 bed · 1.5 bath · 1 story, no stairs | 976 | Request a quote | — |
| AH-03 · The Loft 3 bed · 2.5 bath · main + loft | 986 | Request a quote | $1,650 |
| AH-04 · The Uptown 3 bed · 2.5 bath · 2-story + rooftop | 1,456 | Request a quote | $1,850 |
| AH-05 · The Hangar 3 bed · 2 bath · apartment over a 3-car garage | 976 | Request a quote | $1,700 |
| AH-06 · The American Dream 5 bed · 3.5 bath · 2 story + roof deck | 1,840 | Request a quote | $2,200 |
| AH-07 · The Trifecta 6 bed · 4.5 bath · three units | 2,128 | Request a quote | $2,850 |
| AH-08 · The Launchpad 5 bed · 4 bath · 3-story · main home + 2/2 ADU | 3,061 | Request a quote | $1,700 |
A collection plan is quoted once it is mapped to components. Rent estimates are Wasatch Front averages; The Launchpad's figure is for its ADU only. Land and site work are quoted separately and are not shown as a price until confirmed.
Design, engineering, permits, the foundation, the steel frame, the Arena Standard, and finishes. One contract, one team.
The land, the front door, and anything specific to your parcel — a long utility run, a retaining wall, a city impact fee. Your advisor prices those against your address.
Panels are CAD-cut in a Salt Lake-area factory to a locked spec. The component build-up is the number. Site work, the front door, and the land stay off it until they are confirmed.
Enter your address. We'll tell you whether the October 1 law applies and what fits.
Good to know
Arena prices a home from components: a footprint, a living level, sleeping levels, a loft, a rooftop deck and a garage. You see 13 categories and a by-space view. Lookout, Encore, Loft, and American Dream show a component price. Uptown, Hangar, Trifecta, and Launchpad say request a quote. Build Your Own prices a custom mix from the same engine.
Yes. Utah already required most cities to permit internal ADUs. Since October 1, 2026, S.B. 284 (Utah Code § 10-21-304) has also made a detached ADU a permitted use on most lots of 11,000 sq ft or larger — no conditional use permit. Cities keep setbacks, height, parking caps and owner-occupancy rules, which is why we wrote a page for each city.
Financing runs 3–5 weeks, permitting 3–5 weeks, construction 6–8 weeks, and staging and finish 2 weeks. The steel is panelized and assembled on site.
Generally yes. A well-built ADU adds both rentable income and resale value — many Utah homeowners see $1,200–$2,000 a month in rent and a meaningful bump in appraised value. Arena's plans are engineered to rent from day one, at roughly $1,400–$2,850 a month depending on the plan.
Yes — common options include a home equity line of credit (HELOC), cash-out refinance, renovation loans, and construction loans. Some homeowners use projected rental income to help qualify. Arena can point you to Utah lenders who specialize in ADU financing.
Most single-family lots in Utah qualify for at least an internal or attached ADU. For a detached unit, the number that matters since October 1 is 11,000 sq ft — above it, your city must permit one by right. Share your address and Arena will tell you what your specific lot allows.