Salt Lake County · Service area
Holladay has the lot sizes. The question is what its amended ordinance says.
Being amended now The state floor is what you can rely on today.
Takes about 3 minutes. No email required to see your result.
Holladay's established neighbourhoods contain a high share of parcels comfortably over 11,000 sq ft, which makes it one of the more affected cities along the east bench. Like every specified municipality, it must have a compliant detached ADU regulation in place by October 1.
“A specified municipality shall adopt a land use regulation that permits a detached accessory dwelling unit on any lot or parcel that is 11,000 square feet or larger…” — S.B. 284, Enrolled Copy, Utah Code § 10-21-304, effective October 1, 2026.
The numbers that decide your project
| Rule | Holladay — Holladay City Code — confirm current version |
|---|---|
| Status | Ordinance being reviewed against § 10-21-304 ahead of the October 1 deadline. Arena confirms the current text at the counter. moving now |
| State floor from Oct 1 | Detached ADU is a permitted use on lots ≥ 11,000 sq ft; no conditional use permit in a primarily residential zone. state law |
| Parking ceiling | No more than 2 spaces (unit ≥ 650 sq ft) or 1 space (under 650 sq ft). state law |
state law Quoted from the enrolled copy of S.B. 284 — primary source, verified.
confirm with city From the city's published ADU material or council reporting — Arena confirms at the planning counter before design.
moving now The city is actively amending this ahead of October 1, 2026. Treat as a moving target.
We would rather show you the gap than guess. Arena is a builder, not a law firm — confirm your parcel with Holladay before you sign anything.
What that means on your lot
That single number decides whether the new state law applies to you. Enter your address above — we'll tell you which rule you fall under and which plans fit, in about three minutes.
Arena publishes every price — seven plans from The Lookout at 735 sq ft to The Launchpad at 2,541 sq ft. One team owns design, engineering, permitting and construction.
From $128,625 · see every price →
Plans that fit a Holladay backyard
Permitting queues in Holladay will not get shorter after October 1.