The five-skyscraper redevelopment plan for 1117 Perimeter Center West recently got a favorable review from the Atlanta Regional Commission heading into a public meeting at Sandy Springs City Hall on Aug. 22.

The plan by Australia-based Hong Property Trust calls for about 1,600 residential units in three towers; about 1.5 million square feet of offices in two towers; and about 200,000 square feet of new retail and restaurant space. The towers could stand 20 to 29 stories tall. That’s in addition to the unusual hexagonal office building currently on the 13.5-acre site, which would remain with modifications.

The plan also includes a direct connection to the nearby Sandy Springs MARTA station via an underground tunnel lit by skylights, a concept that MARTA said is “feasible” in a letter contained within an ARC filing.

The project was reviewed by ARC as a “Development of Regional Impact.” In a June 29 report, ARC says the mixed-use, transit-oriented project generally meets the planning agency’s policies and a Livable Centers Initiative plan for the area.

The plan’s “characteristics offer the potential for site residents to work and shop on-site, and for workers and visitors to park once or arrive via transit or other alternative modes and conduct multiple trips on foot,” the report says. “This framework can eliminate dependency on cars for internal circulation, and encourage workers and visitors to use alternative transportation modes to access the development.”

Rob Forrest, a Milton-based developer representing Hong Property in the deal, did not respond to questions.