As of the latest publicly available information up to 2023, there are no specific reports or official announcements indicating that the General Relief Society Building at Temple Square has undergone or is scheduled for significant seismic upgrades or major renovations.

Seismic Work:
The primary seismic retrofitting efforts on Temple Square have focused on the Salt Lake Temple, the Joseph Smith Memorial Building, the Conference Center, and the Church Office Building. The Relief Society Building has not been publicly listed as a target date for seismic upgrades, which often involve thickening foundations, adding seismic braces, or installing base isolators—none of which has been publicly disclosed for this building.

Renovation Plans:
Similarly, no detailed plans or announcements have been made about interior or exterior renovations for the Relief Society Building. If any minor maintenance, stabilization, or preservation work occurs, it usually remains unpublicized unless part of a larger, landmark-project scope.

Cost Estimates:
Since no formal renovation or seismic upgrade has been announced, there’s no publicly available cost estimate for such work on this building. Typically, renovation costs for historic structures can vary widely based on scope—from hundreds of thousands to millions of dollars—especially if major structural reinforcement is involved.

Summary:

• Seismic upgrades: No publicly documented seismic retrofit work on the Relief Society Building.
• Renovation plans: No announced interior or exterior renovation projects.
• Cost: Unknown, as no projects have been publicly disclosed.

For the most current and accurate details, you can consult official LDS Church communications or contact Temple Square’s administrative offices.