Established, Reputable, Knowledgeable

O'Brien Mechanical has been providing plubming and heating contracting services to the San Fransico Bay Area for over 30 years.

O'Brien Mechanical enjoys a long standing customer loyalty and a strong reputation for work quality and project management excellence. This is evidenced by the many high visibility projects completed over the past years.

O'Brien Mechanical's employees are among the most expierenced in the industry. With over 20 years of average expierence per person, we are committed in bringing you the most qualified resources for your project.

Knowledge of proper mechanical system design is an important aspect of any mechanical contractor. Our true stengths lie in our Design - Build capabilities. Through cost competitive layouts, understanding of the local codes, and a proven track record, we have successfully completed many Design - Build Projects.