The Happy Days site has sat untouched by construction for years while projects were proposed then abandoned. The Vanguard Group bought the property 20 years ago with the initial intention of using it to expand its corporate campus. It instead chose to do that somewhere else, leased the property and never developed the land.

The company put the property up for sale in the spring and its location made it incredibly attractive to developers. In fact, before Vanguard, multiple developers considered the property for retail and mixed-use sites.

The site is zoned for industrial and commercial use, according to the Philadelphia Inquirer. That includes farming and the Vanguard tenant has been continuing to operate it as a working farm. The barn and fields of crops would obviously disappear, though, should the sale go through and Audubon move forward with development.

A commercial real estate management and development company based in southeastern Pennsylvania, Audobon’s projects include everything from offices and warehouses to retail centers, retirement communities, and hotels.