Location: 3070 N. St. Helena Hwy., St. Helena

Owner: Trinchero Family Estates, St. Helena

General contractor: Facility Development Corp., Santa Rosa

Landscape: Jonathan Plant & Associates, St. Helena

Design: structure -- BAR Architects, San Francisco; interior -- Erin Martin Design, Napa; lighting -- Marcie L. Shefren Architectural Lighting Design, Berkeley

Engineering: civil -- Summit Engineering, Santa Rosa; structural -- KPFF Consulting Engineers, San Francisco; mechanical -- TEP Engineering, Santa Rosa; electrical -- Ray E. Slaughter & Associates, Petaluma

Kitchen: Castino Restaurant Equipment & Supply, Rohnert Park

ST. HELENA -- The Trinchero family has been producing wine in Napa Valley since acquiring Sutter Home Winery in 1947, but they waited until just the past several years to find the right home for their luxury brand, Trinchero Napa Valley.

"It's a legacy to my grandparents, Mario and Mary Trinchero," said Bob Torres, an owner and senior vice president of operations, said of the brand.

In 2004, the family acquired the Folie à Deux winery just north of St. Helena and has been transforming the 22-acre knoll overlooking Napa Valley. The first phase was a new nearly $11 million winery.

A University of California, Berkeley, architecture graduate, Mr. Torres takes pride in the simple, clean design, brought to life by BAR Architects, a San Francisco firm behind a number of winery projects.

"We're not very pretentious people, so we wanted early American agricultural architecture," he said. But the family wanted to incorporate the Industrial Revolution exposed-steel feel from founders' roots in Italy, so heavy wood trusses were replaced with steel supports in the ceiling of the fermentation and barrel rooms. 

To make room for the new winery, Folie à Deux production moved to the Napa Cellars winery near Oakville, and the winemaking building was demolished. In its place, Santa Rosa-based general contractor Facility Development Corp. constructed a 24,000-square-foot production facility.

Trinchero Napa Valley focuses on vineyard-designated wines from about 100 acres of estate vines in five Napa Valley appellations. That limits production to roughly 300 tons of grapes a year, or 15,000 cases. But not not all of that goes into Trinchero Napa Valley wines, which retail for $35 to $100 a bottle.

Commensurate with that target quality level, incoming 35-pound lugs of freshly picked grapes are stored in a refrigerated room before they are sorted up to three times by hand or crushed at a slow rate of two and a half tons an hour.

The second phase of the winery project was the $5 million-plus, 10,800-square-foot hospitality and culinary center. The third phase will be a new 8,000-square-foot visitor's center and administrative offices. The plan is to start that work in the next couple of years. For now, the Trinchero Napa Valley tasting room is in the same house Folie à Deux used for that purpose.

While the tasting room project remains on the horizon, the 3,100-square-foot Folie à Deux subterranean cellar is being expanded a bit and upgraded.

"We're remodeling the old caves there now, which were leaking, and boring them larger," Mr. Torres said. Alf Burtleson Construction of St. Helena is making them a bit roomier, encompassing 3,800 square feet on completion.