From the NY Post:
The city's building boom has come crashing down -- in some cases literally.
Scores of mothballed construction projects are on the verge of collapsing, forcing officials to spend millions to demolish or shore them up, records show.
In the fiscal year that ended in June, at a cost of roughly $10,000 per site, emergency scaffolding sheds were placed around 75 buildings -- nearly triple the 27 in fiscal 2007, according to the Department of Housing Preservation and Development.
Then there's the ever-present problem of squatters. The city didn't lock up a single vacant building three years ago, but it was forced over the last fiscal year to seal the doors and windows of 47 abandoned ones -- all to keep vagrants out. The cost? An average of $2,000 per building.
The number demolished has also soared, from 53 in fiscal 2008 to 75 this past fiscal year. That averaged out to $49,000 a building.
Debris from city properties, meanwhile, has rained down on at least 15 pedestrians this year, according to Department of Buildings records.