Riverside County, CA Historic Preservation: Historic-Cultural Monuments (2026)
Key Facts
- Governing chapter
- Riverside County Code Ch. 15.72
- Permit required
- Historic district alteration permit
- Issuing authority
- County planning director
- Advisory board
- Five-member local review board
- Applies to
- Unincorporated county only
Summary
Riverside County lets owners or the county petition the board of supervisors to create historic preservation districts. Once designated, demolishing, building, or altering a contributing resource inside the district requires a historic district alteration permit from the planning director.
Within the boundaries of a historic preservation district, no person shall demolish, cause to be demolished, construct, or cause to be constructed, any building, structure or façade, except in strict compliance with this chapter and any plans approved in conjunction with the issuance of a historic district alteration permit.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 84 Update 1).
Full Breakdown
Under County Ordinance No. 578.5 (Code Chapter 15.72), the Riverside County Historical Commission reviews district applications and the board of supervisors holds a public hearing before establishing a historic preservation district. Inside a designated district, no one may demolish, construct, or alter the exterior of a building, structure or facade that is a "contributing resource" without a historic district alteration permit from the planning director, who acts on advice from a five-member local review board. Owners must also keep district buildings from falling into disrepair. This applies only in unincorporated Riverside County: the city of Riverside, Temecula, Palm Springs, Indio and the county's other incorporated cities each administer their own separate historic preservation ordinances.
Violations & Fines
Demolishing, constructing, or altering a contributing resource without an alteration permit is treated as a public nuisance and strict-liability offense, enforced under County Ordinance No. 725; each day the violation continues counts as a separate offense.
Frequently Asked Questions
Does this apply inside the city of Riverside?
Who decides if my building needs an alteration permit?
What happens if I alter a resource without a permit?
Sources & Official References
Other rules in Riverside County
California rules heatmap·Compare Riverside County to another location·View the California historic preservation overview
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