The Destruction of Tony Stark's Mansion was a semi-successful assassination attempt committed by Eric Savin on Aldrich Killian's orders. While Stark's home was destroyed and the world became convinced the billionaire was dead, Stark survived the attack and set out to uncover the true identity of the Mandarin.
Tony Stark was visiting his friend Happy Hogan at a hospital after an explosion at the Chinese Theatre. While leaving, multiple people tried to interview him. Someone asked why Stark had not killed the Mandarin by now. To this, he threatened the Mandarin publicly and on television, and also gave him his address so they could fight.
At his house, Stark was greeted by Maya Hansen, who tried to warn him of the attack the Mandarin was bringing to them. Pepper Potts was also in the building with them.