State Preemption of Local Zoning in Rhode Island
How Rhode Island state law overrides local zoning ordinances. ADU preemption, lot split preemption, and impact on city-level regulations.
Statewide ADU Preemption Applies
State law establishes statewide preemption standards that supersede local regulations. The citation and source below confirm the verified legal basis.
What Is State Preemption?
State preemption occurs when a state law overrides local government ordinances in a specific area. In land use, preemption means a city or county cannot adopt zoning rules that are more restrictive than the state standard. If a city tries to prohibit something the state law permits, the state law wins.
Rhode Island actively uses preemption in housing law. The state has enacted legislation that prohibits local governments from blocking certain types of housing development — most notably accessory dwelling units (ADUs) and lot splits.
Compare all 51 jurisdictions: ADU preemption table · Short-term rental preemption table
ADU Preemption
Rhode Island General Laws § 45-24-73 — Design Standards Required for Accessory Dwelling Units; Consistent Statewide Treatment of Accessory Dwelling Units Required (as amended by P.L. 2024, ch. 284 [2024-H 7062 Sub A] and ch. 285 [2024-S 2998 Sub A], eff. June 25, 2024) · Verified September 2, 2026 · Source
This law preempts local ordinances — cities cannot impose rules stricter than the state ADU standard. Effective 2024-06-25 · Verified September 2, 2026 · Source.
What local governments cannot restrict:
- An ADU meeting these by-right requirements is a permitted use in all residential zoning districts and shall be permitted through an administrative (ministerial) building permit process only — no discretionary review, public hearing, or variance. · Source
How Preemption Affects Rhode Island Cities
State preemption applies to every incorporated city and unincorporated area in Rhode Island. Select a city below to see how state preemption interacts with local zoning rules.
Source: Rhode Island General Laws § 45-24-73 — Design Standards Required for Accessory Dwelling Units; Consistent Statewide Treatment of Accessory Dwelling Units Required (as amended by P.L. 2024, ch. 284 [2024-H 7062 Sub A] and ch. 285 [2024-S 2998 Sub A], eff. June 25, 2024). Last verified April 5, 2026. View source