A portion of Elon Musk’s wealth seems to be invested in real estate as the Tesla (TSLA) and SpaceX CEO has reportedly spent about $100 million on a series of homes in California since 2012.

According to the Wall Street Journal, six of the properties are located in close proximity to each other in the Bel-Air community of Los Angeles while the seventh is located close to Tesla’s corporate headquarters in Northern California.

The seven properties differ vastly as one is a $22.3 million colonial mansion complete with tennis court, five garages, and pool while another is a $7.8 million ranch home formally-owned by actor Gene Wilder, the news outlet said.

Other homes in the Musk collection reportedly include a $20 million six-bedroom house with eight bathrooms, a $4.9 million with four-bedrooms, a $27.3 million six-bedroom home made up of geometric shapes, and most recently a $4.2 million colonial house.

The property located near Tesla headquarters, is a 100-year-old mansion with a value of $27.2 million, which was previously owned for 150 years by the same family, featuring a ballroom, flower-arranging room, staff wing, and pavilion with 18th century Chinese wallpaper – all situated in a treelined estate with manicured gardens and large front driveway, the Journal said.

The report did not indicate which home is Musk’s primary residence. Musk is reported to have a net worth of $26.4 billion, according to Bloomberg Billionaires Index.

Shares of Tesla stock were up 2.37% as of 11:15 a.m. EST on Friday.