Simon Helberg has upgraded his living accommodations in a big way with the purchase of Hollywood bad boy Charlie Sheen’s Mediterranean mini-mansion.

Known for his role as ultra-nerd aerospace engineer Howard Wolowitz on the CBS comedy The Big Bang Theory, Helberg is reportedly shelling out $2.9 million for the Los Angeles, California property, located just south of the Griffith Observatory and Mount Hollywood in the prominent Los Feliz neighborhood.

Sheen purchased the estate with former wife Brooke Mueller in 2007 for $2.575 million and has had the house on the market since mid-2009.

Built in 1927, the newly-minted Helberg manor measures in at just under 4,200-square-feet and features a restored interior with Bouquet Canyon stone flooring, capacious living room with trestle-style vaulted ceilings, formal dining room and a generous master suite.