After two years of construction from 1972-1974 for the Expo '74 in Spokane, the venue officially opened as the Washington State Pavilion Opera House on May 1, 1974.

The legislative bill to transfer the ownership to the city was signed on April 20, 1979 in a special ceremony in front of the Opera House with then-Washington State Governor Dixy Lee Ray, although the actual legal transfer of the property would not take place until 90 days after the current state legislative session ended.

[6] In 2006, Spokane-based Inland Northwest Bank purchased the naming rights to the Spokane Opera House in a 10-year, $1.5 million deal[7] and the facility was renamed to the INB Performing Arts Center.

In December 2015, it was announced that INB's naming rights deal was renewed for an additional 10 year period.

At the time of closing, First Interstate announced plans to phase out the Inland Northwest Bank name in November 2018.