Transportation Permits

A transportation permit is required anytime a vehicle and/or load exceeds the following legal dimensions, on roads in unincorporated Sonoma County.

California Vehicle Code (CVC) 35780

Application Process

A Transportation Permit Application (below) can be submitted in one of three ways:

  1. Fax at: (707) 565-3313
  2. Mail at:
    Transportation Permits
    Permit Sonoma
    2550 Ventura Avenue
    Santa Rosa, CA 95403
  3. In person at Permit Sonoma's Permit Center

After receiving your application, Permit Sonoma staff will review your application for the following:

  • Confirm application completeness.
  • Evaluate application to determine load weight class & dimensions.
  • Review route to determine whether any rerouting is necessary. Rerouting may be required if there are any conflicts with structures, events, or anticipated traffic.
  • Evaluate route to determine if pilots and/or a CHP escort are required.

Once the Transportation Permit Application is approved and paid, Permit Sonoma staff fax a copy of the permit to the applicants.

Please review the special provisions and related materials below when filling out your application.

ENC-003 Transportation Permit Application (PDF: 137 kB)


You must wait until the permit has been issued and you have received a record number (beginning with "TRN"). You will need your record number to make your payment.

You may pay the permit fees in one of two ways:

  1. Pay online via Permits Online. Select "Pay Fees" and then enter the Record Number in the search.
  2. Call the Permit Sonoma Cashier at (707) 565-3944.

Contact Information

Contact Engineering by Phone
Permit Sonoma
2550 Ventura Avenue
Santa Rosa, CA 95403
38.465074, -122.723705

Special Permits