The Assessor’s office can update the mailing address we have listed on your property file. This this is the address where the office valuation change notice is sent. Updating your mailing address with the Assessor’s Office will also update your address for Treasurer’s office property tax statements.

Updating your mailing address will not result in a mailing address change with other county offices such as Elections, Auditor, and others.

You can update your mailing address by:

• Email
• Phone
• In office visit (by appointment only)

Notification of Mailing Address Change by Email

Please send an email to assessor@co.whatcom.wa.us with the following information:

• Parcel, geo ID, or property ID number(s)
• Taxpayer name
• Taxpayer old mailing address
• Taxpayer new mailing address

Notification of Mailing Address Change by Phone

Please call us at 360-778-5050 and have your parcel, geo ID, or property ID number(s) ready.

Notification of Mailing Address Change by in Office Visit

Our office is open for walk-in requests with limited lobby capacity. We recommend notifying us for a mailing address change by email or phone to reduce wait times.