The family that owns the 104-year-old building told KING-TV the structure is compromised.
The three-story building was once a hotel with stores on the first floor. The gambling club in the basement was the scene of the robbery and shooting that killed 13 people.
A member of the family that owns the building, Teri Woo, says a vigil will be held for the victims.
The family plans to rebuild with apartments and stores on the site.
More Northwest Headlines
Assaults on staff at state psych hospital costing millions Everett man, 52, dies of natural causes in Skagit County jail Seattle Black Lives Matter protest draws hundreds Polar bear at Tacoma zoo dies; suffered from liver cancer Yakima might hire outside investigator for city employees Fleeing burglary suspect jumps in Puyallup River Farm recalls produce used in Costco salad linked to E. coli Oregon firefighters rescue owl tangled in fishing line
Our new comment system is not supported in IE 7. Please upgrade your browser here.