Then there is the education secretary, Betsy DeVos, worth $890 million; the Treasury secretary, Steven T. Mnuchin, who rings in at $621 million; Elaine L. Chao, the transportation secretary, whose assets add up to $25.6 million; and the secretary of state, Rex W. Tillerson, a former Exxon Mobil chief executive who is worth $385 million.

“You can fly your wealthy flag for the time being,” said Julie Khuzami, a former New Yorker who has lived in Washington since 2009, noting that previously the standard Washington style of dress leaned toward safe and homogeneous. “I think people are going to be a lot flashier. And I think CityCenter can cater to a segment that thinks it’s now O.K. to be a little bit flashier.”

The moneyed gleam of the Trump administration seems to be attracting the eye of businesses across the country, with corporations like Boeing, Chevron and others donating a combined $90 million, nearly double the record, for Mr. Trump’s inaugural celebrations. Companies like Amazon, General Motors and Walmart have courted the administration with visits and announcements about hiring and investing in the United States.

Developers are hoping that representatives from businesses like these will carve time out of their trips to Washington to stop at CityCenterDC, which is within a 15-block radius of at least 17,000 hotel rooms as well as attractions like the National Gallery of Art, the White House and the Walter E. Washington Convention Center.

“A lot of people come to Washington to do business with the government,” said Howard Riker, a managing director at Hines, the developer of CityCenterDC. “We have taken advantage of that. I think we’ll see more and more of that with the new administration, which has a pretty ambitious agenda, so I think there will be people coming into town to participate.”

If CityCenterDC does live up to its name, it will be reviving fashion in an area that was once known for stores like Woodward & Lothrop, one of the first department stores in Washington, and Garfinckel’s, which was frequented by the likes of Jacqueline Kennedy and Lady Bird Johnson over its 80 years in business. And it will happen just after the closing of a landmark Washington-area store: Saks Jandel, which, over the course of more than a century catered to Nancy Reagan, Condoleezza Rice and Elizabeth Taylor.