Teutul originally started out owning Orange County Ironworks, a fabrication shop now solely owned and managed by son Daniel. He began building custom bikes for pleasure after being inspired by the many custom bikes appearing on the streets and in films. In 1999 he left and founded Orange County Choppers. He hired his son Paul Jr. and began building bikes for sale.
Teutul's regular arguments with his sons became a routine occurrence during episodes of American Chopper. These vocal disagreements eventually led to Paul Jr. being fired in April 2009. Paul Jr. has since started a design Business called Paul Jr. Designs.