The best place to find more information about historic preservation in your state including funding, research, laws, project review, listing on the National Register or your State Register (if applicable), is through your State Historic Preservation Office.

National Park Service guidance on historic preservation

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Treatment of historic buildings | Secretary of the Interior’s Standards for Preserving, Rehabilitating, Restoring and Reconstructing Historic Buildings

Evaluation of historic resources to the National Register | National Register Bulletins

Methods to preserving historic buildings | Preservation Briefs