Our Offices

We have offices in the San Francisco Bay Area and Guilin, China. If you are looking for a San Francisco detective, contact our office in beautiful San Francisco. For the assistance of a Marin detective, a San Rafael detective, or a Sonoma detective, our San Rafael office is available to serve you. Our Bay Area Detectives cover Northern California. If you require the assistance of a China detective, please contact our Guilin, China office.

Our San Francisco Detectives cover the San Francisco Bay Area, including San Mateo, Santa Clara, Alameda, Contra Costa counties.

Our Marin detectives cover Marin, Sonoma, Mendocino, Lake, Napa and Solano counties

Our China detectives cover all of China. We have satellite offices in Shanghai, Nanning and Guangzhou.

California Investigation Offices

San Francisco Investigation Office

350 Rhode Island Street, Suite 240
San Francisco, CA 94103

866-392-0072 (Toll Free)
415-462-1631 (International)
[email protected]


Marin Investigation Office

1537 4th Street, Suite 136
San Rafael, CA 94901

[email protected]

Nevada Investigations | US Investigations

Nevada investigations and US investigations are handled out of our San Francisco office


China Investigation Offices

Our Partner: Zhong Yang Business Investigation Services

  • Guilin
  • Shenzhen / Guangzhou
  • Shanghai
  • +86-773-580-5515
  • 415-462-0505 (San Francisco number – connects to China office.  No international charge to party calling from the US)
  • Https://www.chinainvestigator.com