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File 224-78-R: Environmental Assessment and Preliminary Report to the Zoning & Subdivision Examiner — Boeing Corporate Headquarters, Sea-Tac Airport West Side

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Proposed Boeing HQ 1978

In 1978, the Port of Seattle applied to rezone a 29-acre parcel on the west side of Seattle-Tacoma International Airport from single-family residential to Manufacturing Park (M-P) to allow Boeing to build its Corporate Headquarters Office Facility. The proposed Phase I development included a two-story, 150,000-square-foot building with underground parking for 235 cars and roughly 200 employees, along with road construction, radar relocation, and site landscaping. The application required an Environmental Impact Statement and raised land-use compatibility questions given that surrounding community plans had designated much of the site as open space or parkland.

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King County Department of Planning & Community Development, Building and Land Development Division environmental assessment and preliminary report (File 224-78-R) for a zone reclassification from RS-7200 (Single Family Residence) to M-P (Manufacturing Park) on a 29.42-acre site on the west side of Sea-Tac Airport, located on the east side of 12th Ave. S. between 167th St. and 172nd St. Applicant is Port of Seattle; project sponsor is Boeing Company for a Corporate Headquarters Office Facility. Phase I includes a two-story building with approximately 95,000 sq ft of office space, 55,000 sq ft of support facilities, and parking for 235 cars; approximately 200 employees. Discusses Highline Communities Plan (King County Ordinance #3538), Sea-Tac Communities Plan (King County Ordinance #2883), King County Comprehensive Plan policies B-30, B-31, C-3, C-7, Airport Surveillance Radar (ASR) relocation, Draft EIS circulated December 1977, Final EIS issued March 1978.

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