Vacaville city feature
About this landmark
Peña Adobe is Solano County's oldest standing structure.
Peña Adobe, located on Peña Adobe Road off Interstate 80 in Vacaville, sits within Peña Adobe Park, administered by the City of Vacaville. The adobe is designated California Historical Landmark No. 534 and was added to the National Register of Historic Places in 1972.
Construction and History
Built in 1842 on Rancho Los Putos, the adobe was constructed using traditional methods. The structure was built by 25 Mission-trained Indian laborers who created both the Vaca and Peña adobes. These laborers sun-dried the adobe mud bricks used in construction, a labor-intensive process that created the building's distinctive material character. The walls measure two feet thick, with individual bricks sized at 23 by 10 by 3 inches. The structure features hand-hewn redwood timbers, dirt floors, and four windows—elements that reflect 19th-century building practices in Northern California.
The site eventually became a Vacaville City park in 1965, ensuring its preservation for future generations. Today, Peña Adobe Park spans either 1.5 acres or 1 acre, deawaiting confirmation on the source, and contains multiple structures beyond the adobe itself. The park includes the Mowers-Goheen Museum, the Willis Linn Jepson Memorial Garden, and the Indian Council Ground. These additions have made the park a multipurpose cultural and educational space within Vacaville.
Visiting Today
The Peña Adobe Historical Society, a volunteer-staffed nonprofit established in 2004, provides educational and cultural services at the site and works to preserve the adobe's history and significance. The adobe is open the first Saturday each month from February through December, making it accessible to the public on a regular basis. Private tours are available upon request, allowing groups and individuals to schedule visits outside the standard monthly opening. The organization's work has been instrumental in maintaining the adobe and sharing its historical importance with Vacaville residents and visitors.
The adobe stands as the oldest documented structure built in Solano County, a distinction that underscores its historical significance. Its preservation reflects the region's commitment to maintaining its heritage sites and ensuring that important structures survive for future study and appreciation. The thick adobe walls, redwood timbers, and minimal windows reveal the building techniques and materials available to 19th-century builders in Northern California. Walking through the adobe offers insight into how people lived and worked during the Spanish and Mexican periods.
Insurance connection: Earthquake insurance and older homes
Older structures like Peña Adobe, built before modern seismic codes, face different risks than contemporary buildings. California's Earthquake Authority offers coverage with deductible options ranging from 5% to 25%. Homes built before 1980 without seismic retrofitting face a minimum 15% deductible, as do homes valued over $1 million. Earthquake insurance deductibles apply as a percentage of your home's value. Additional living expense coverage can help pay for temporary housing and other necessities following an earthquake. Coverage eligibility and specific limits depend on your individual policy. The issued policy controls.
Primary sources: Wikipedia entry for Peña Adobe, Peña Adobe Historical Society official page, and Solano Resource Conservation District page.
Insurance context is general information only. The issued policy and its endorsements settle coverage.