Both projects target the area near the intersection of Davis Drive and High House Road. One is a residential and retail development. The other is an assisted living center.
Two shopping centers are located at the intersection already. The two new projects will add 1 million square feet of commercial space to the area.
"There isn't enough capacity to handle what they're trying to propose here," said Richard Byrne, who lives nearby. "The density that's going in this corner doesn't follow the land-use plan."
About 1,800 Cary residents signed a petition opposing the project.
"All of the regional malls today are near highways. There's not a highway here, so it's a lot of density for what is really a residential area," Byrne said.
Cary Planning Director Jeff Ulma said town officials took residents' concerns very seriously, and the plans for the projects have been revised.
"It's very hard to defeat (the projects)," Byrne said. "We have a Town Council that is very, very, very, very pro-development."