How to get your certificate: Engineering or land surveying firms

Due to facility issues, this licensing program has limited operations. There may be delays in responding to requests. We apologize for the inconvenience. We’re working toward resuming all business operations as soon as possible.

Who needs a license?

All corporations, joint stock associations, and limited liability companies (LLCs) that offer engineering or land surveying services must have a certificate of authorization in Washington, except for professional service (PS) corporations and professional service limited liability companies (PLLCs).

How to apply

  1. File a business license application to get a Unified Business Identifier (UBI) number from the Department of Revenue.
    • You must include your UBI number on the application.
    • Your firm must be registered with the Washington Secretary of State before we can issue your certificate of authorization.
  2. Complete a Corporation or Limited Liability Company Certificate of Authorization Application.
  3. Have the Designated Engineer/Land Surveyor Affidavit (page 2 of the application) notarized.
  4. Mail the completed application, supporting documents, and a check or money order for the fee (payable to the Department of Licensing) to:
    Department of Licensing
    Business and Professions Division
    PO Box 35001
    Seattle, WA 98124-3401

Frequently asked questions

I work for a Canadian firm with several engineers licensed in Canada. Can we apply for a certificate of authority without having an engineer licensed in Washington State?
No, the designated engineer must be a licensed professional engineer in Washington.

How do I change the designated engineer or land surveyor for my firm?
Have the new designated engineer or land surveyor complete the Change of Designated Engineer/Land Surveyor form and send it in to our office.

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