Downtown Denver’s development boom is showing little sign of slowing, with $2.47 billion in projects currently under construction or in the planning process.

Eighteen commercial, residential and civic projects were underway as of this month, and another 14 were being planned, according to the Downtown Denver Partnership’s annual State of Downtown Denver report released Tuesday.

Combined, the projects comprise some 1,230 new hotel rooms, 4,592 residential units and 2.77 million square feet of office space being added to Denver’s downtown core.

In 2015, 15 projects worth $634.7 million were completed, representing an infusion of 511 new hotel rooms, 1,901 residential units and 333,000 square feet of office.

“The numbers speak for themselves,” Downtown Denver Partnership CEO Tami Door said Tuesday. “We are a growing city. We are aspiring to be something even greater than we are.”

Among the projects currently under construction downtown are:

• 1144 Fifteenth, a 40-story skyscraper at 15th and Lawrence streets that will add more than 600,000 square feet of new Class A office space when completed in 2018.

• 1401 Lawrence, a 22-story, 311,000-square-foot office tower at 14th and Lawrence that recently topped out and should be completed later this year.

• A 495-room, dual-branded AC Hotel/Le Méridien hotel at 15th and California streets set to open in 2017.

• Pivot Denver, a 580-unit luxury apartment complex at 17th and Wewatta streets to be anchored by a 56,000-square-foot Whole Foods Market opening in 2017.

• Ashley Union Station, a 107-unit apartment complex at 18th and Chestnut Place that will include 75 income-restricted units when it opens in 2017.

• SkyHouse Denver, a 26-story, 354-unit luxury apartment tower on the site of the former Cosmopolitan Hotel at Broadway and East 18th Avenue.

During a partnership event Tuesday morning, city and business leaders also discussed the challenges and opportunities posed by downtown’s growth, including housing affordability, workforce development and transportation issues.

“We aspire to be a great city, and now we’re starting to be a great city. And guess what? We’re having great city problems,” said Rob Cohen, CEO of IMA Financial and chairman of the partnership’s Downtown Denver Inc. board of directors. “We all have an opportunity to be a part of the solution and not a part of the problem.”

East West Partners managing partner Chris Frampton said, in his mind, downtown’s next frontier will be Arapahoe Square, a largely undeveloped area northeast of downtown bounded by 20th Street and Park Avenue between roughly Lawrence and Welton streets.

“There’s this direct connection between Arapahoe and downtown,” Frampton said. “You don’t have to build a train system to get there — you’ve already got one. You don’t have to build bike paths to get there — we’ve already got it. It’s just walk in and walk out.

“Honestly, it’s just sort of sitting there,” he said. “I think you’ll see an enormous amount of development. It doesn’t have any of the barriers that any other spots have.”

Emilie Rusch: 303-954-2457, erusch@denverpost.com or @emilierusch