Rediscovering Hewlett-Packard's Early Architecture

During my research on the HP Loveland Architectural Render, I was put in contact with Dreiling Terrones Architecture, the successor firm to CSS/Clark, Stromquist, Potter & Ehrlich, the designers of the Loveland, CO campus. Birge Clark (the aforementioned “Clark”) was a noteworthy Palo Alto architect responsible for designing much of Palo Alto’s downtown, as well as the HP Palo Alto, Santa Clara, and Loveland campuses. Clark’s notes and papers are preserved at Stanford University (collections SC0823 and SC0838).

Over email correspondence, Martin Dreiling and Richard Terrones were kind enough to relay some images from HP’s Bay Area campuses and details of Clark’s significant fondness for the buildings he had designed for HP. Below is a card he was presented by his office.

"...as soon as I get one more shot of Hewlett-Packard"

In addition, they provided several historical shots of HP’s California facilities. Note that none of these depict the Loveland campus.

Hewlett-Packard, Palo Alto — historical photograph, date unknown. Courtesy of Dreiling Terrones Architecture.

Hewlett-Packard Valley Plant, Palo Alto — historical photograph, date unknown. Courtesy of Dreiling Terrones Architecture.

And one of HP Santa Clara (now Agilent’s Stevens Creek campus). The firm’s work on the Santa Clara Division facilities dates to 1968 and 1975.

Hewlett-Packard Santa Clara Division — historical photograph, date unknown. Courtesy of Dreiling Terrones Architecture.

Although these photographs don’t depict the Loveland facility, they provide a fascinating glimpse into the architectural relationship between Hewlett-Packard and Clark’s firm during the company’s early expansion. I’m grateful to Martin and Richard for sharing these materials and helping preserve this small piece of Silicon Valley history.

These photographs and the hand-drawn card were shared by Martin Dreiling and Richard Terrones of Dreiling Terrones Architecture in October 2026 and are reproduced here with their permission. Original photographers and dates are not yet identified.