Jessica is reportedly purchasing Sharon and Ozzy Osbourne's former mansion in the Hidden Valley neighbourhood of Los Angeles.
The 11,000 square foot mansion, which is more than double the size of her current Beverley Hills home, has six bedrooms and ten bathrooms, and a tidy list price of $13 million.
The purchase comes ahead of the arrival of her second child with fiancé Eric, with whom she already has 9 month old daughter Maxwell.
Jessica and Eric have put wedding plans on hold (again!) to focus on preparing their new mega-mansion for the arrival of baby number two.
Related: Jessica Simpson reveals the name of second baby