Service Company Information

This information is intended for the use of professional service companies including, but not limited to, tax services,  and mortgage companies.

Check taxes online.

The property taxes are searchable by property ID, geo parcel number, street address or owner name. Each parcel will show basic property characteristics, current taxes, delinquent taxes and up-to-date penalty and interest calculations. The data is refreshed nightly, after close of business.

Tax Roll Data

The Whatcom County Treasurer can provide current and delinquent tax roll files by email, or CD. New tax year information is generally available after January 31, and delinquent files are available year round. Download tax roll file specifications redacted (PDF). This file is available to any requestor once payment has been received.

The Whatcom County Treasurer may provide an unredacted tax roll file when the request is accompanied by a signed and notarized Declaration Regarding Commercial Purposes (PDF) and payment has been received. If your company has a form on file, you do not need to complete a new form. Download tax roll file specifications (PDF).

Requesting Data

To request tax roll data, make a written request and enclose:

  • A check for the $350 annual tax roll fee payable to the Whatcom County Treasurer. This fee covers all your tax roll requests for the calendar year, this is not a per request fee
  • A completed public record access form, if necessary
  • A return shipping envelope and label, if necessary

Mail the request to:

Tax Services

Whatcom County Treasurer's Office

311 Grand Avenue, Suite 104

Bellingham, WA 98225

Electronic Payments

All tax services, mortgage companies, and financial institutions must provide electronic payment data in the approved layout when the payment listing is more than 10 parcels. Any manual listing in excess of 10 parcels will be subject to a $5 per parcel processing fee. Download electronic payment specifications (PDF).

Payment must be received by the Treasurer on or before the due date, and must be accompanied by the data. Data may be sent on CD, or by email.

Late payment charges may apply if the data sent is unreadable, such as a formatting error, OR if inaccurate information is provided, such as incorrect property ID or Geo Parcel numbers.