BIG’s One High Line finally reaches completion in New York City’s West Chelsea neighborhood

The Alter Group is partnering with White Oak Realty Partners to develop a 490,000-sf high-performance office building in Chicago’s West Loop. The tower will be located on land owned by Old St. Patrick’s Church (a neighborhood landmark that survived the Chicago Fire of 1871) that’s currently being used as a parking lot.

Winners of the eVolo 2011 Skyscraper Competition include a high-rise recycling center in New Delhi, India, a dome-like horizontal skyscraper in France that harvests solar energy and collects rainwater, and the Hoover Dam reimagined as an inhabitable skyscraper.

Besides making cities more affordable and architecturally interesting, tall buildings are greener than sprawl, and they foster social capital and creativity. Yet some urban planners and preservationists seem to have a misplaced fear of heights that yields damaging restrictions on how tall a building can be. From New York to Paris to Mumbai, there’s a powerful case for building up, not out.

The Legacy at Millennium Park is a 72-story, mixed-use complex that rises high above Chicago’s Michigan Avenue. The glass tower, designed by Solomon Cordwell Buenz, is mostly residential, but also includes 41,000 sf of classroom space for the School of the Art Institute of Chicago and another 7,400 sf of retail space. The building’s 355 one-, two-, three-, and four-bedroom condominiums range from 875 sf to 9,300 sf, and there are seven levels of parking. Sky patios on the 15th, 42nd, and 60th floors give owners outdoor access and views of Lake Michigan.

The 58-story Austonian in Austin, Texas, is the tallest residential building in the western U.S. Benchmark Development, along with Ziegler Cooper Architects and Balfour Beatty (GC), created the 850,000-sf tower with 178 residences, retail space, a 6,000-sf fitness center, and a 10th-floor outdoor area with a 75-foot saltwater lap pool and spa, private cabanas, outdoor kitchens, and pet exercise and grooming areas.

A new luxury condominium tower in Los Angeles, The Carlyle has 24 floors with 78 units. Each of the four units on each floor has a private elevator foyer. The top three floors house six 5,000-sf penthouses that offer residents both indoor and outdoor living space. KMD Architects designed the 310,000-sf structure, and Elad Properties was project developer.

The 300,000-sm VietinBank Business Center in Hanoi, Vietnam, designed by Foster + Partners, will have two commercial towers: the first, a 68-story, 362-meter office tower for the international headquarters of VietinBank; the second, a five-star hotel, spa, and serviced apartments. A seven-story podium with conference facilities, retail space, restaurants, and rooftop garden will connect the two towers. Eco-friendly features include using recycled heat from the center’s power plant to provide hot water, and installing water features and plants to improve indoor air quality. Turner Construction Co. is the general contractor.

MGM Resorts officials want to demolish the unopened 27-story Harmon Hotel—one of the main components of its brand new $8.5 billion CityCenter development in Las Vegas. In 2008, inspectors found structural work on the Harmon didn’t match building plans submitted to the county, with construction issues focused on improperly placed steel reinforcing bar. In January 2009, MGM scrapped the building’s 200 condo units on the upper floors and stopped the tower at 27 stories, focusing on the Harmon having just 400 hotel rooms. With the Lord Norman Foster-designed building mired in litigation, construction has since been halted on the interior, and the blue-glass tower is essentially a 27-story empty shell.