Welcome to the OHP!

The California Office of Historic Preservation (OHP) administers federally and state mandated historic preservation programs to further the identification, evaluation, registration, and protection of California's irreplaceable resources. Explore our webpages, learn more about the OHP, and join us in preserving and celebrating California’s heritage!

Project Submittals for the OHP

Our office now accepts and prefers project submittals via email. Visit our Submission Guidance page for instructions on how to submit materials electronically.

Where Can I Find a List of Historically Designated Properties?

Our website provides listings of many of the California properties designated or eligible for designation as historically significant.

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OHP Monthly ePost

Catch up on the latest preservation news, trainings, and more via our monthly ePost.

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Sustainable Preservation

California’s Statewide Historic Preservation plan offers actionable goals for preserving and celebrating our collective heritage.

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California Historical Landmarks

California has more than 1,060 designated California Historical Landmarks honoring our richly diverse heritage.

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Have a question about preservation or the OHP? We have answers...

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Climate Action

Visit our Climate Action page to learn how California is addressing the impacts of climate change on historic resources.

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Disasters & Historic Resources

For those caring for historic resources, our Disasters page offers information on preparing for, responding to, and recovering from major disasters.