In-N-Out Burger should be serving up stacked 4×4 burgers and animal style fries in the metro area by this time next year. The Lone Tree City Council on Tuesday night voted 5-0 to approve construction of a 3,867-square-foot In-N-Out restaurant at 9171 Westview Road, just northwest of Park Meadows Mall. The Southern California-based chain, which has only expanded to five states beyond the Golden State in its 71 years of existence, has a rabid following devoted to its limited menu of burgers, fries and shakes. The Lone Tree restaurant is expected to open in late 2020.