Clos Du Bois Winery

Great wine and lasting relationships age well. Goal: Have Clos du Bois’ tasting room operating within six months of groundbreaking. Without sacrificing craftsmanship or budget, we met the deadline. Result? A bold industrial look with colored concrete floors, exposed trusses, round ducts, and steel countertops. Next we added 18,000 sf of barrel and tank storage space to an existing warehouse. Through our value-engineering efforts, existing insulated concrete panels were moved 90 feet, preserving original design at minimum cost. A few years later, we added 120,000 sf, nearly doubling the winery’s size. The expansion included a new crush pit, tank pads, bottling line, loading dock, barrel storage, case storage, and a fire protection pumphouse. Our latest project added administrative offices and a hospitality center, completing the master plan.

Project Team

Clos Du Bois Winery – Culinary Center

  • Location:
    Geyserville, CA
  • Size:
    3,149 sf
  • JMA Project Manager:
    Steve Ronchelli
  • JMA Superintendent:
    Tom Monroe
  • Architecture:
    Ozborn Design Group
  • Landscape Design: 
    Blasen Landscape Architecture
  • Mechanical Engineering: 
    Horn Engineers
  • Electrical Engineering: 
    Northern Electric
  • Structural Engineering:
    ZFA
  • Geotechnical Engineering:
    Earth Mechanics

Clos Du Bois Winery – Administration Building

  • Location:
    Geyserville, CA
  • Size:
    3,178 sf
  • JMA Project Manager:
    Steve Ronchelli
  • JMA Superintendent:
    Tom Monroe
  • Architecture:
    Dick Osborn-Ozborndooli Architecture
  • Structural Engineering:
    ZFA
  • Civil Engineering:
    Atterbury & Associates
  • Mechanical Engineering:
    Climate Mechanical
  • Energy Consultant:
    Save Energy Consulting
  • Geotechnical Engineering:
    Earth Mechanics

Clos Du Bois Winery – Tasting Room

  • Location:
    Geyserville, CA
  • Size:
    3,300 sf
  • JMA Superintendent:
    Larry Braughton
  • Architecture:
    Ozborndooli Architecture
  • Electrical Engineering:
    Northern Electric
  • Structural Engineering:
    ZFA
  • Civil Engineering:
    Atterbury Associates

Clos Du Bois Winery – Steel & Barrel Cellar Expansion

  • Location:
    Geyserville, CA
  • Size:
    220,000 sf
  • JMA Project Manager:
    Steve Ronchelli
  • JMA Superintendent:
    Jesse Gladman
  • Architecture:
    Ozborndooli Architecture
  • Electrical Engineering:
    Northern Electric
  • Structural Engineering:
    ZFA
  • Civil Engineering:
    Atterbury Associates
  • Mechanical Engineering:
    Climate Mechanical
  • Geotechnical Engineering:
    Earth Mechanics

Clos Du Bois Winery – Barrel Cellar

  • Location:
    Geyserville, CA
  • Size:
    18,000 sf
  • JMA Project Manager:
    Jim Kreofsky
  • JMA Superintendent:
    Dave Nash
  • Architecture:
    Ozborndooli Architects
  • Structural Engineering:
    ZFA
  • Civil Engineering:
    Atterbury Associates