Preston Companies Email Format

ConstructionCalifornia, United States201-500 Employees

The Preston Companies is a mid-size construction firm based in Milpitas, California, that focuses on utilities installation and earthwork services. Its work encompasses excavating and installing underground wet and dry utilities, along with soils testing and management and fill site oversight. The company emphasizes building relationships with clients through consistent service, integrity, and quality, supported by a professional staff that aims to understand and address project needs. It operates through three brands—Preston Pipelines, Preston Electric, and DirtMarket—covering pipelines, electrical work, and related earthmoving activities. 

In the California construction sector, Preston Companies positions itself as a provider of integrated underground utilities and site-management solutions for complex projects. Safety is prioritized across its processes, with ongoing training to minimize incidents and uphold a culture of safety.

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