TDA is the Bay Area’s leading Structural Engineering firm specializing in the design and retrofit of residential and commercial structures. Learn More »

Our Services

What Our Clients Say

  • “Kelly and his staff have one goal – To make Architects Heroes!  They do this very well indeed.”

    Residential Architect, San Francisco, CA

  • “These Guys are Great! They exude tremendous energy and drive to meet the needs of all involved.  My Architect said he never has worked with an Engineer Like this before & he has been the business for 34 years… TDA delivered the proposal for my requested work & met me on-site the same day.   We spent 3 hours brainstorming with my Architect and they finished the Schematic Design the same day.  They are the  most thorough, friendly, and competent Structural Engineers I have ever worked with. I highly Recommend these guys even if you are currently contracted with Another Engineer.   GREAT EXPERIENCE!”

    John Singletary, Greenbrae, CA