A complaint about a possible code violation is made by letter, e-mail, fax or in person. Please be prepared with specific information such as the address of the property, details of the situation and the length of time you have observed the situation. Contact us at 925-674-7210 or Toll Free at 877-646-8314. You may submit a complaint form online. You may also submit a complaint form by printing and submitting by fax, mail or drop off to the office.