The state's most prominent office complex is at a crossroads.

With 5.5 million square feet total across office, retail and hotel space, the Renaissance Center on Detroit's riverfront sits in a downtown that is rapidly being reinvented and redefined by billionaires. It is a city within a city — it literally has its own ZIP code and post office — and an at-times perplexing labyrinth that even has a mobile app to help visitors navigate. And now the Detroit riverfront is teeming with development activity, ranging from new apartments and hotel and art space to the east and large public parks and a to-be-demolished Joe Louis Arena to the west. The popular Detroit RiverWalk is at its doorstep.

But it faces wolves on its front door, too.

It has large blocks of unused space, hundreds of thousands of square feet, although the property is healthily occupied overall at north of 80 percent. Meanwhile, more than 1 million square feet of new office space is planned on the other side of Jefferson Avenue both by billionaire Dan Gilbert and the dynastic Ilitch family, albeit available to tenants at substantially higher leasing rates. That's not including planned renovations of existing space in rehabilitated buildings.

The more than 80-member team from Los Angeles-based CBRE Inc. responsible for leasing and managing the behemoth complex has been active, peeling off 106,000 square feet of new and renewed leasing in 2017-18, said Edward Wujek, senior vice president of advisory and transaction services for CBRE.

One of the leasing strategies? Simply what you can see with your eyes.

"Because we aren't wedged into the central business district with a bunch of other buildings, every floor has a great view," he said, adding that parking is ample at the complex that was built in the 1970s and early 1980s. The team plays up the complex's proximity to the water, multitude of retail tenants and other amenities to lure new occupants.