Salt Lake County · Service area
Draper's rules are proportional — and that's the part worth reading.
Already allowed The statute removes the discretion.
Takes about 3 minutes. No email required to see your result.
Draper already permits detached ADUs, but sizes them against your existing house rather than a flat cap. From October 1 the city can no longer route a qualifying detached unit through a conditional use permit.
“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 | Draper — Draper City Code 9-10 |
|---|---|
| Maximum size | Detached ADU limited to 50% of the primary dwelling's square footage. confirm with city |
| Setbacks | Same building setbacks as a house in the underlying zone. confirm with city |
| Height | Up to 35 ft. confirm with city |
| Parking | At least one extra space on site, not tandem and not directly behind another space. confirm with city |
| Owner occupancy | The primary dwelling must be owner-occupied. confirm with city |
| One or the other | No internal ADU is allowed if a detached ADU exists. One per property. confirm with city |
| Utilities | May not be served by separate utility meters from the primary dwelling. confirm with city |
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 Draper 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 Draper backyard
Permitting queues in Draper will not get shorter after October 1.