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Lefler Engineering, Inc. is committed to providing quality services for reasonable consulting fees with an emphasis on customer service and meeting deadlines.


Lefler Engineering was founded in September 1978 in San Rafael as a mechanical engineering consulting firm that provides Heating, Ventilating, Air Conditioning, Plumbing, and Fire Protection design services for a wide variety of buildings.

Our design projects range from 1000 square feet up to 600,000 square feet. Lefler employs two licensed and two degreed mechanical engineers, one designer, and one CAD drafter.

The Lefler Engineering philosophy is to design mechanical systems which are energy efficient, long lasting, and also cost effective from an initial cost standpoint.

All jobs done by our office have direct and continuous participation by at least one professional engineer.

Lefler Engineering, Inc. has a great deal of experience in designing office spaces, schools, restaurants, multi-family residential, data centers, hospitals, laboratory facilities, banks, retail spaces, prisons, police and fire stations, and wineries. A specific list of job references is available upon request.

Other areas of expertise for Lefler Engineering, Inc. include the design of "green" building mechanical systems and compliance with LEED guidelines, building energy studies and reports, building surveys, design-assist specifications and construction review, investigative work and reports, and expert testimony. Our office can also provide complete MEP services as a joint venture with one of our many electrical engineering company partners.

Lefler Engineering, Inc. is engaged in projects in the San Francisco area, the Silicon Valley, the San Jose area, the East Bay, Sonoma County, Marin County, the Sacramento Valley, Southern California, as well as areas outside of California.

Currently Lefler Engineering, Inc. is licensed to work in California, Hawaii, Oregon, Washington, Michigan, Texas, and Florida. We are also qualified through the National Counsel of Examiners for Engineering and Surveying for licensing in all 50 states.



For more information, please visit our Contact page or email the office directly.


Lefler Engineering, Inc. is committed to providing quality services for reasonable consulting fees with an emphasis on customer service and meeting deadlines.


Lefler Engineering was founded in September 1978 in San Rafael as a mechanical engineering consulting firm that provides Heating, Ventilating, Air Conditioning, Plumbing, and Fire Protection design services for a wide variety of buildings.

Our design projects range from 1000 square feet up to 600,000 square feet. Lefler employs two licensed and two degreed mechanical engineers, one designer, and one CAD drafter.

The Lefler Engineering philosophy is to design mechanical systems which are energy efficient, long lasting, and also cost effective from an initial cost standpoint.

All jobs done by our office have direct and continuous participation by at least one professional engineer.

Lefler Engineering, Inc. has a great deal of experience in designing office spaces, schools, restaurants, multi-family residential, data centers, hospitals, laboratory facilities, banks, retail spaces, prisons, police and fire stations, and wineries. A specific list of job references is available upon request.



Other areas of expertise for Lefler Engineering, Inc. include the design of "green" building mechanical systems and compliance with LEED guidelines, building energy studies and reports, building surveys, design-assist specifications and construction review, investigative work and reports, and expert testimony. Our office can also provide complete MEP services as a joint venture with one of our many electrical engineering company partners.

Lefler Engineering, Inc. is engaged in projects in the San Francisco area, the Silicon Valley, the San Jose area, the East Bay, Sonoma County, Marin County, the Sacramento Valley, Southern California, as well as areas outside of California.

Currently Lefler Engineering, Inc. is licensed to work in California, Hawaii, Oregon, Washington, Michigan, Texas, and Florida. We are also qualified through the National Counsel of Examiners for Engineering and Surveying for licensing in all 50 states.



For more information, please visit our Contact page or email the office directly.