This bill establishes new requirements for cities and code cities in Washington regarding the designation of historic landmarks. It mandates that cities must adopt or amend their development regulations, zoning regulations, and preservation ordinances to comply with specific criteria for designating properties as historic landmarks. Notably, properties less than 40 years old cannot be designated, and any designation that restricts the use, alteration, or demolition of a property requires the written consent of the property owner. If a city fails to adopt the necessary regulations within one year, the new requirements will supersede any conflicting local regulations. However, these limitations do not apply to properties within a historic district established through a local preservation ordinance.

Additionally, the bill reenacts and amends existing law to clarify that certain actions taken by cities to implement these new requirements are not subject to administrative or judicial appeals. This includes actions consistent with the new sections added by this bill, which aim to streamline the process for designating historic landmarks while ensuring property owners' rights are respected. The bill emphasizes the importance of local preservation efforts while providing a clear framework for cities to follow in their landmark designation processes.