Learn more about City's role in Issaquah's development of 4th high school
The Issaquah School District (ISD) is currently working to develop a new comprehensive fourth high school located at 4221 228th Ave. SE in Issaquah. The City of Issaquah has approved Master Site Plan (MSP) and Site Development Permit (SDP) amendments for the proposed ISD High School #4. The project site itself is completely within Issaquah’s city limits and they retain all the permit and jurisdictional authority, with the exception of a right of way permit needed from the City of Sammamish for frontage improvements on 228th.
The City is required to review right of way permit applications for adherence to public works standards, stormwater requirements, and documented State Environmental Policy Act (SEPA) mitigation measures. If a project meets these standards and requirements, state law requires that the City issue the permit.
As required by law, the City of Sammamish reviewed the right of way permit application for compliance with the 2016 King County Stormwater Design Manual with Council approved amendments, the 2016 Public Work Standards (which are the most recent) and ISD’s issued Final Revised SEPA Mitigation Determination of Non-significance dated Jan. 17, 2022. The application was found in compliance with all required regulations and mitigation strategies, as well as engineering best practices. Therefore, the City is required by state law to issue the permit.
The City of Sammamish has no authority over activities happening within the City of Issaquah’s jurisdiction, nor can it withhold a legal right of way permit.
The City of Sammamish has shared a variety of concerns regarding High School #4 with ISD and the City of Issaquah for several years. Based on City of Sammamish input, ISD made changes to the road design, frontage and other improvements during the design process.
Sammamish’s role in ISD High School #4 is limited to its jurisdiction over the right of way and its legal obligation to issue a permit that meets all required standards and mitigation strategies. All other aspects of the project are outside of City of Sammamish jurisdictional limits and authority.
Individuals looking for more information on ISD High School #4 should contact the Issaquah School District. The District has recently updated their capital projects page to include information about proposed High School #4, including contact information.
Information on the City of Issaquah’s permitting process can be found here. Documents related to active permits within the City of Issaquah can be found here using the map browsing tool. Finally, the most recent November 19, 2025 City of Issaquah Development Commission meeting which included extensive information on this proposed school campus project can be found on the City of Issaquah Development Commission webpage or click here for a direct link to the agenda and video of the meeting.