Developer David Edelstein’s townhouse sells for $21.5 million, the best new architecture of 2012 … and more

Developer David Edelstein’s UES townhouse, purchased two years ago for $12.85M, trades for trades for $21.5M. Is NYC’s rental market softening? Curbed’s choices for the ugliest apartments of 2012. The best new architecture of 2012. Finally, a year of real estate game changers — from Mark Zuckerberg’s low, low mortgage to a $20M one-bedroom. Read these stories and more after the jump.