 Architectural firm Bebb and Gould , assisted by the John Graham Company , designed the original structure . Carl Frelinghuysen Gould designed it in an Art Deco style . Located 350 ft ( 110 m ) above sea level at the northern edge of Beacon Hill , the 239 ft ( 73 m ) tower overlooks downtown Seattle and Elliott Bay . The 259 @,@ 703 sq ft ( 24 @,@ 127 @.@ 2 m2 ) building sits on a 9 @.@ 5 @-@ acre ( 3 @.@ 8 ha ) landscaped property . It was listed in the National Register of Historic Places in 1979 . In 1992 , the building received landmark status from the city . The northern addition completed in 1994 was considered significant by the American Institute of Architects . It was noted that the exterior of the building could have been supported by new beams and trusses . Instead , the new space integrated almost seamlessly with the original building while being seismically beneficial . 
