Downtown Delray Beach’s calling card is Atlantic Avenue, its famed urban retail corridor. But the affluent area’s “next big thing” is an influx of cash for residential and office projects that planners say will reinvigorate downtown and spill off the main drag.

For years, retail broker Roxanne Register has sold and leased along Atlantic. But the CBRE Inc. vice president said residential, office and mixed-used projects are adding to Delray Beach’s charm.