Gene Maddaus Senior Media Writer SAG-AFTRA announced Tuesday that it has bought an office building in North Hollywood for $46.6 million and plans to relocate its headquarters there in the next few years. The performers’ union has been renting its headquarters in the Museum Square building in the mid-Wilshire area. In 2015, the guild extended its lease into 2026. Duncan Crabtree-Ireland, the union’s executive director, said in a statement that the new building will provide more space and better facilities, and that the union will save money over the long run by owning instead of renting. The new building is at 12020 Chandler Blvd., adjacent to a stop on the Orange Line busway and a few blocks from the NoHo Arts District. The building is currently home to Pilgrim Media Group and Screen Engine/ASI.