O'Brien Cellars is owned by Bart and Barb O'Brien, who purchased the former Costello winery from John Costello in March 2000. The winery was built in 1978 and is therfore one of the earlier wineries (probably #40 out of 400) in Napa Valley. The winery is unusual in that it is entirely self-contained, with everything required to turn grapes into wine, including a bottling line.

We are open for tours and tastings by appointment. The tour includes a stroll in our vineyards to discuss vineyard practices (we don't use any pesticides or herbicides and all of the harvesting is done by hand) and a seated tasting of our wines. As long as seasonal winery operations allow it, we also provide a tour of the winery with a discussion of the role of barrels in winemaking (this is where we explain why we choose to purchase incredibly expensive French oak barrels from specific forests in France rather than using the American oak barrels for 1/3 the price).

We love what we do and would love to share it with you.