When a corporation or institution (museum, university), signs off on the creation of a new building for itself, usually designed by a "starchitect", convinced that this new "home" will bestow prestige, success, and street-cred among its associates, patrons, and even its rivals. Occurrence usually coincides with various economic "bubbles" where cash seems to be overflowing everywhere. (See also: "Irrational Exuberance")
"Now that Time Warner has officially divorced itself from AOL, don't you think they have at least a bit of builder's remorse for that huge hunk of new rock in Manhattan?"
"The Bilbao? Yeah, it's cool looking, but in this economy I'll bet the Guggenheim gang is feeling some mean builder's remorse."