Los altos custom built decks - In 1981 M&M Builders open it's doors to the Silicon Valley. My name is Mark von Dohren, I started M&M Builders with a creative desire to build high quality woodworking designed to integrate specifically with the landscaping to create something uniquely different. I am a native of the Bay Area and love this place I call home. I am proud of my work and the approach I take towards my business.