Contra Costa County Historical Landmarks Advisory Committee (HLAC)
Staff Report for May 8, 2025, Meeting
1. Call to Order
2. Public Comment:
3. Acceptance of Summary Minutes for February 13, 2025, Meeting
4. Discussion Items:
A. County File #CDCV25-00028: Request for Historic Nomination to the County HRI for a residential house building located at 205 Lake Drive in Kensington to qualify for a Mills Act contract.
o A Historical Resources Evaluation (HRE) has been prepared by Pierluigi Serraino, Ph.D., FAIA to evaluate the potential resources eligibility to be nominated to the HRI, and is attached to this staff report.
o The HRE states the building is eligible under criterion 2: Associated with the lives of persons important to local, California or national history. Harold L. Thiederman is recognized as an influential 20th century architect for the Bay Area. Thiederman designed the Alumni Hall at UC Berkeley, as well as the Kaiser Clinics in Napa, Walnut Creek, and Redwood City, and later on the Kaiser Foundation Hospital in Hayward, and the Kaiser Medical Center in Terra Linda.
o The HRE states the building is also eligible under criterion 3: Embodies the distinctive characteristics of a type, period, region or method of construction or represents the work of a master or possesses high artistic values. Its mid-century modern architecture remains intact. Built in 1949, Thiederman purchased it in 1962, and designed two out of three subsequent additions while living there.
o The HRE concludes with an Integrity Analysis using the seven aspects of integrity (location, design, setting, materials, workmanship, feeling, and association) as established by the National Parks Service.
o Staff recommends that this item be continued until further analysis is provided on the integrity of the historical resource, and a draft Mills Act 10-year Rehab Plan is prepared showing the intended work necessary to rehabilitee the building.
B. County File#CDCV25-00032: Request to dete...
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