Utah County · Service area
Provo allowed detached ADUs only inside overlay zones. That ends October 1.
Overlay zones only today The statute opens the rest of the city.
Takes about 3 minutes. No email required to see your result.
Provo has some of the most restrictive detached ADU rules in Utah County — permitted only in specific overlay zones, sized between 300 and 800 sq ft, and carrying a four-space parking requirement. The city is reworking the ordinance and has published a map of newly eligible parcels; a 40% accessory lot-coverage cap is under discussion.
“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 | Provo — Provo City Code — under revision |
|---|---|
| Detached ADUs today | Permitted only in specific overlay zones. confirm with city |
| Detached ADUs from Oct 1 | Permitted use on any qualifying lot ≥ 11,000 sq ft in a primarily residential zone. state law |
| Size | Not less than 300 sq ft and not more than 800 sq ft — a cap the statute now constrains. confirm with city |
| Parking | Four off-street spaces for a single-family dwelling with an ADU; tandem permitted for two vehicles. State law now caps ADU-assigned demand at two. confirm with city |
| Owner occupancy | Owner-occupant required. confirm with city |
| Appearance | Must not alter the single-family appearance; no external evidence of more than one household; no more than two meters per utility. confirm with city |
| Proposed lot coverage | 40% maximum for all accessory structures, under discussion. moving now |
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 Provo 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.
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Plans that fit a Provo backyard
Permitting queues in Provo will not get shorter after October 1.