how much naming a building costs

In case of the General Motors Building in New York – tens of millions of dollars. The building itself was put on the market for 3.5 BILLION dollars back in 2008 and the owner felt like the naming rights alone should warrant millions and millions of dollars. But guess what? Even though the building was sold just a few months later (for $2.8 billion) – it still carries the “General Motors Building” name.