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General Information

The 'Regulatory Handbook' and 'Project Questionnaire' websites are part of a series of applications that make up the Online Permit Assistance System (OPAS) provided by the Office for Regulatory Innovation and Assistance (ORIA) that provides information about Environmental Permits and regulations for Washington State. OPAS is a central database managed by the ORIA. Data is fed regularly to these systems as they work together to provide the Project Questionnaire and the Regulatory Handbook with information about Environmental regulations and permits in Washington State.

What is a 'Permit', Approval, or License?

A permit is typically a required document for which you may first need to complete an application. In this Handbook, it also includes Environmental Licenses, Requirements, Certificates, and Approvals.


The information contained on the Regulatory Handbook, Project Questionnaire or any other related websites is provided on an "AS IS" basis, without warranty of any kind.

The Governor's Office for Regulatory Innovation and Assistance (ORIA) disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties or fitness for a particular purpose. In no event will ORIA be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or loss resulting from any use or misuse of these data.

Local Government Limitation

The OPAS websites do not provide information on permits and approvals from CITY or COUNTY governments. You should contact the county or city where you want to conduct the activities if your project:

  • Involves clearing, grading, open burning, construction, demolition, or additions to existing structures;
  • Will be served by an on-site sewage disposal system;
  • Requires division of land;
  • Is in an area regulated by the local shoreline management plan;
  • Is in an area regulated by the local comprehensive flood control management plan.

See for cities or for counties

Privacy Notice

None of the OPAS websites gather and track personal or project related information. They are simply tools for your use to understand environmental permitting in Washington State.

Data Completeness

The completeness and accuracy of permit data is dependent upon the knowledge, skill and care taken by permitting specialists that contribute the information. In the Regulatory Handbook, there is a 'Last Update' date which states when the permit was last edited. In some cases this date may show that a particular permit has not been updated for some time. If you feel that the information presented is grossly out of date for any permit, please contact the Office for Regulatory Innovation and Assistance at

Optimal Browsing Requirements

The OPAS websites can be viewed by most modern web browsers such as Chrome, Internet Explorer, Firefox, and Safari and with a minimum monitor display setting of 800x600 pixels.


For all questions, comments, or any other issue related to this website including its content or function, please contact:

Governor's Office for Regulatory Innovation and Assistance
Information Center
Town Square, Building 4
1011 Plum St SE
PO Box 43125
Olympia, WA  98504-0002
Telephone: (360) 407-7037
Toll Free: (800) 917-0043
© 2021 Governor's Office for Regulatory Innovation and Assistance