About Us

One And Only Electric started as a home-based family business in 1998 and has since grown to become one of the oldest, most respected Pleasanton area electricians. It's no coincidence that for over 20 years, Pleasanton's have been relying on the Dempsey difference for all of their residential and commercial electrical needs. As an established Pleasanton electrician, One And Only Electric has the skills, training, and experience to get any electrical job done right - the first time.


  • Alameda County                           

  • Contra Costa County 

  • San Jose Area 

  • Pleasanton

  • Danville 

  • Livermore

  • Dublin

  • Tri Valley Area

  • San Francisco

  • Bay Area

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