Roberto--Sunol Adobe

The Roberto-Sunol Adobe at 770 Lincoln Avenue in San Jose is one of the oldest surviving structures in Santa Clara County, built in the closing decades of the Mexican period on lands associated with the broader Pueblo de San Jose. The original adobe dwelling is generally attributed to Roberto Balermino, an Indigenous resident of the pueblo, and was later acquired and substantially enlarged by Antonio Sunol, a prominent Catalan-born merchant who became one of the leading civic figures of early San Jose.

The building combines two distinct phases of California building tradition. The earliest section is a single-story adobe of the vernacular Mexican-period type, with thick earthen walls laid on stone footings, exposed timber lintels, and a low gabled roof. Sunol's mid-nineteenth-century additions transformed the property in the Monterey style, introducing a second story, a wide cantilevered balcony along the principal facade, and frame construction over the older adobe core. The hybrid character of the building reflects the broader transition from purely adobe construction to the timber-framed Monterey idiom that swept coastal California in the 1840s and 1850s.

Sunol and his family used the property as a residence through the mid-nineteenth century, and it later passed through successive private owners. It was listed on the National Register of Historic Places in 1977 under reference number 77000344 in recognition of its rarity as a surviving Mexican-period adobe in the Santa Clara Valley and its association with early San Jose civic history.

The building remains in private ownership today.

Within California's adobe tradition, the Roberto-Sunol Adobe documents both the modest Indigenous and Mexican-period adobe construction of the Santa Clara Valley and its subsequent enlargement under the Monterey-style influence of the early American period, illustrating the layered building history common to surviving pueblo-era structures.