Preston Companies

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Preston Companies The Preston Companies bring extensive expertise and hands-on partnership to complex projects. Our mission, vision, and values define us.

As a Silicon Valley Best Place to Work with over 50 years of experience, our services include excavating and installing underground wet and dry utilities, soils testing and management, and fill site management. Our services include excavating and installing underground wet and dry utilities, soils testing and management, and fill site management. We are committed to building strong customer relationships based on outstanding service, integrity, and quality. Our dedicated, highly professional staff takes a proactive approach to recognizing your needs and exceeding your expectations on every project. Hard work, honesty, loyalty, and talent are highly valued and rewarded at all Preston Companies. All people including customers, suppliers, and fellow employees deserve to be treated with the utmost courtesy, concern, and respect. As a Silicon Valley Best Place to Work, we give our people the autonomy and responsibility to do their jobs, and encourage collaboration and teamwork to find the best solutions possible. But most importantly, we demand that safety never be compromised. We make safety a priority in all of our processes and procedures, and invest in training to minimize the chances of accidents. Preston Pipelines | CA #1059395 | A, C16, C34, C42 HAZ
Preston Electric | CA #1052142 | C10
DirtMarket | CA #1052786 | A, C57

We're in the trenches so that you don't have to be. 🫡
10/14/2026

We're in the trenches so that you don't have to be. 🫡

We are excited to share that Preston Pipelines Infrastructure LLC has received an Experience Modification Rate (EMR) of ...
10/09/2026

We are excited to share that Preston Pipelines Infrastructure LLC has received an Experience Modification Rate (EMR) of 0.77 from the National Council on Compensation Insurance (NCCI). This score is well below the industry average and reflects our commitment to a risk-mitigative and safety-oriented culture. It also marks a record best EMR for our team, whose dedication to safety is second to none.

Congratulations to everyone who made this incredible accomplishment possible! 🎉
Read more through the link in our bio.

Congratulations to our Q3 Safe Driver of the Quarter!Dispatch is recognizing DOT driver Eliazar Mendez for his consisten...
09/28/2026

Congratulations to our Q3 Safe Driver of the Quarter!

Dispatch is recognizing DOT driver Eliazar Mendez for his consistent, steady performance across 9,000+ miles and 244+ hours. His record of zero harsh braking events is proof that he is proactive rather than reactive. On top of that, he has maintained a perfect 100 safety score throughout the entire quarter. Excellent work, Eliazar! 💯

Carl Carpenter and his team are sure making us proud. Our August Crew of the Month has received recognition from their g...
09/22/2026

Carl Carpenter and his team are sure making us proud. Our August Crew of the Month has received recognition from their general contractor for their careful attention to site access and perimeter protection amidst busy summer conditions, ensuring safe routes around work areas for everyone nearby, including the public. Way to go, team! 👍

Hey Mustangs! 👋 Preston is here now, until 3:00 PM, at the California Polytechnic State University (Cal Poly) Fall Caree...
09/16/2026

Hey Mustangs! 👋 Preston is here now, until 3:00 PM, at the California Polytechnic State University (Cal Poly) Fall Career Fair. Let's chat about building a career in construction 😁

Call on your friends at DirtMarket to move some serious dirt! We're in San Jose importing clean material to a residentia...
09/10/2026

Call on your friends at DirtMarket to move some serious dirt! We're in San Jose importing clean material to a residential site which will eventually become two homes and some condominiums. Perhaps you can say we help materialize housing. 🏡

This Labor Day, we're giving a big "thank you" to our incredible workers. To all those who dedicate their efforts and pa...
09/07/2026

This Labor Day, we're giving a big "thank you" to our incredible workers. To all those who dedicate their efforts and passions into building our communities, this day is for you.

Big smiles all around from our Berkeley team! 😁
09/02/2026

Big smiles all around from our Berkeley team! 😁

Our July Crew of the Month has been complimented by Berkeley partners for being "one of the best contractors [they] have...
08/28/2026

Our July Crew of the Month has been complimented by Berkeley partners for being "one of the best contractors [they] have seen in 27 years on campus." This special recognition reflects their dedication to go the extra mile in ensuring the safety of the public in a high-traffic area. Congratulations and thank you, Brad Cruse and crew! 👏

Time for the annual Preston summer BBQ in Sacramento! We had a fantastic time celebrating our field crews with good food...
08/26/2026

Time for the annual Preston summer BBQ in Sacramento! We had a fantastic time celebrating our field crews with good food and even better company. There was some great fun with raffles and a dunk tank, too! This is how we do summers at Preston 🙂‍↕️☀️

Address

133 Bothelo Avenue
Milpitas, CA
95035

Opening Hours

Monday 7am - 5pm
Tuesday 7am - 5pm
Wednesday 7am - 5pm
Thursday 7am - 5pm
Friday 7am - 5pm

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