The massive concrete structure was reinforced with more than 500 tons of steel, and supported by more than 150 caissons extending up to forty-five feet into the bedrock.

On March 15, 2002, the church was designated a Historic-Cultural Monument by the Los Angeles Cultural Heritage Commission.

As of 2023, The Great Organs at First Church consist of 18,094 speaking pipes, 328 ranks, 15 divisions, and a total of 278 speaking stops: The Moller Consoles were installed during renovations in the early 1990s, replacing the original duplicate Schlicker consoles of 1969 which had become outdated and could no longer fully control the many new additions.

The current organist in residence, Dr. Christoph Bull, hosts a free playlist of videos featuring The Great Organs at First Church, for those interested in hearing the instrument in action.

The church has been a popular location for commercials, films, music videos, and television shows.