We have performed many projects as a design build contractor. Our clients find this type of relationship very beneficial to them. It speeds up the design process and the overall construction schedule. With a contractor looking at all the cost implications and the partial design throughout the process, the client is assured of receiving the product they want within budget.


With our up-to-date computer technology and software programs we provide competitive estimates and cost control.


Over the years we have developed strong working relationships with agencies, officials, consultants, subcontractors, and suppliers. We handle every phase of your project, from site selection to final design and construction—whether your building is concrete, wood frame, or a steel building project.


Our design and building process can take weeks even months off of your project and its cost. We have a reputation for accurately projecting costs and coming in on budget.


Architects and developers report that we enhance their relationships with their clients through our track record of successful projects and fine tuned project management system.

Greystone Winery in Napa County


Centered in the Sonoma County Wine Country, we have had the…

Nguyen Dental Offices New Construction


Offices can be as visually striking as any other building.…

Merry Edwards Winery Metal Building Construction

Metal Buildings

Pre-engineered buildings can be as beautiful and unique as any other…

Two Acre Wood in Sebastopol


Köch Construction is proud to create beautiful, high-quality housing structures. There…

Windsor Christian Academy in Sonoma County


Köch Construction also handles the construction of large scale buildings,…

Lakewood Shopping Center in Windsor


Köch handles all commercial construction projects, no matter the size…