Permitted uses
Seattle Mun. Code § 23.69.008
in effectA. All uses that are functionally integrated with, or substantively related to, the central mission of a Major Institution or that primarily and directly serve the users of an institution shall be defined as Major Institution uses and shall be permitted in the Major Institution Overlay (MIO) District. Major Institution uses shall be permitted either outright, or as conditional uses according to the provisions of Section 23.69.012 . Permitted Major Institution uses shall not be limited to those uses which are owned or operated by the Major Institution. B. The following characteristics shall be among those used by the Director to determine whether a use is functionally integrated with, or substantively related to, the central mission of the Major Institution. No one of these characteristics shall be determinative: 1. Functional contractual association; 2. Programmatic integration; 3. Direct physical circulation/access connections; 4. Shared facilities or staff; 5. Degree of interdependence; 6. Similar or common functions, services, or products. C. Major Institution uses shall be subject to the following: 1. Major Institution uses which are determined to be heavy traffic generators or major noise generators shall be located away from abutting residential zones; 2. Uses which require the presence of a hazardous chemical, extremely hazardous substance or toxic chemical that is required to be reported under Title III of the Superfund Amendments and Reauthorization Act of 1986 or its associated regulations, shall be reviewed by the Director. The Director shall consult with Public Health—Seattle & King County and The City of Seattle Fire Department. Based on this consultation and review, the Director may prohibit the use, or impose conditions regulating the amount and type of such materials allowed on-site, or the procedures to be used in handling hazardous or toxic materials; 3. Where the underlying zone is commercial, uses at street level shall complement uses in the surrounding commercial area and be located in a manner that provides continuity to the commercial street front. Where the underlying zoning is a pedestrian-designated zone, the provisions of Section 23.47A.005 governing street-level uses shall apply. D. When a use is determined to be a Major Institution use, it shall be located in the same MIO District as the Major Institution with which it is functionally integrated, or to which it is related, or the users of which it primarily and directly serves. To locate outside but within 2,500 feet of that MIO District, a Major Institution use shall be subject to the provisions of Section 23.69.022 . E. Major Institution uses, outside of, but within two thousand five hundred (2,500) feet of the boundary of the MIO District, which were legally established as of January 1, 1989 and are located on sites which are not contiguous with the MIO District shall be permitted uses in the zone in which they are located when: 1. The use is located on a lot which was contained within the boundary of an MIO District as it existed on May 2, 1990; or 2. The site was deleted from the MIO District by master plan amendment or renewal according to the provisions of Sections 23.69.035 and 23.69.036 . F. Uses other than those permitted under subsections 23.69.008.A and 23.69.008.B shall be subject to the use provisions and development standards of the underlying zone. (Ord. 126626 , § 4, 2022; Ord. 123668, § 1, 2011; Ord. 122311 , § 84, 2006; Ord. 118362 § 10, 1996; Ord. 115002 , § 23, 1990.)
Source: Seattle Municipal Code (Municode library)URL: https://library.municode.com/wa/seattle/codes/municipal_codeFetched: 7/25/2026