Zoning › State preemptions › Utah

Utah HB 82 — Internal ADU Mandate (2021) (UT)

Tracked preemption from the Utah overlay bundle.

Overview

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Effective
2021-10-01
Sunset
—
Authority
state
Scope
state:UT
Other Utah preemptions
Utah ADU By-Right in Residential Zones (SB 140 / HB 409)Utah MIH Non-Compliance Enforcement PreemptionUtah First Home Investment Zone (HB 462)Utah SB 174 — Single-Family Housing Modifications (2022)Utah Moderate Income Housing Plan (MIH) Framework
Primary-source summary
HB 82 — Internal ADU Mandate (2021)

Trigger predicate

When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.

parcel.base_zone_category ∈ {res_sf}

Preempted fields

2 fields on the base district schema are rewritten when the trigger fires.

FieldOpValueNote
base_districts[category=res_sf].allowed_usesaddinternal_adu
review_typewaive_discretionary—

Citation

Authority source
Utah HB 82 (2021); Utah Code §10-9a-511.5
§ §10-9a-511.5 (internal accessory dwelling units)
https://le.utah.gov/~2021/bills/static/HB0082.html

Research notes

HB 82 (2021) required cities to allow internal ADUs (within existing structures) by right in residential single-family zones. Cities retain authority over size, design, and parking for internal ADUs. Superseded in scope by SB 140 / HB 409 (2023) which added detached ADU by-right; internal-ADU overlay retained for citation completeness.