Transbay Security Service Inc. was established in 1964 and serves all of Marin County and portions of Sonoma county. We provide professional service for your home, business and vehicle. With a variety of products and services, we can meet most all your security needs. From installations of high security commercial lock systems to the basic residential re-keying. In addition to our store location, our mobile units are fully equipped to provide the necessary services you require at your location.