408-980-8741 [email protected]




“We believe our personalized high quality service and commitment to customer satisfaction separates De Bella Mechanical, Inc. from our competition.”                – Paul J. DeBella, CEO / President

De Bella Mechanical, Inc. (DMI) stands as a leading force in the Ultra High Purity Process Piping Industry throughout the San Francisco Bay Area. With a focus on Semiconductor Fabrication Facilities, cutting-edge bio-pharmaceutical laboratories, and tool installations, DMI consistently delivers innovative solutions that yield positive outcomes.

Founded in the Bay Area, DMI has cultivated a longstanding reputation as a trusted mechanical contracting company over the past 37 years. Renowned for our reliability, expertise, and versatility, we take pride in offering a comprehensive range of services tailored
to diverse industries.

Since our establishment in 1987 as an Ultra High Purity (UHP) Process Piping contractor serving the high-tech microelectronics/semiconductor sector, DMI has evolved into a full-service mechanical contractor. Today, we extend our expertise to the biotech and biopharmaceutical industries, in addition to providing standard commercial HVAC and plumbing solutions.


As the marketplace and Silicon Valley continue
to expand, so do our capabilities at DMI. As a comprehensive mechanical contractor, we
specialize in all aspects of piping and sheet metal applications, insulation, firestop services, and offer preventative maintenance and round-the-clock support to our clients.

In fact, our expertise in insulation and firestop services led us to establish Bay Area Mechanical – Insulation (BAM) in 2011. Serving the mechanical industry with excellence, BAM is your go-to solution for all mechanical insulation requirements, from standard HVAC office upgrades to critical facility process systems.

Located in Santa Clara, California, in the heart of Silicon Valley, DMI operates from a facility
equipped with dedicated welding and fabrication bays for both sheet metal and piping. With a vast inventory of materials and components readily available, we ensure swift project turnaround times. Our commitment to innovation distinguishes us, enabling us to deliver efficient and effective services tailored to our clients’ needs.

Years Established