Portland has tons of LEED buildings, but they’re hoping to claim the greenest residential condo tower in the United States. The Casey Condominiums is on track to be the first residential building in the U.S. to receive LEED Platinum certification. Sitting on the corner of NW 12th and Everett, which is smack dab in the Pearl District, this 16-story tower will have 61 units averaging just over 2,000 sf in size. Word is they’re 70% pre-sold, too. And in addition to 4,200 sf of ground-floor retail space, the luxury, eco-tower will feature a multi-faceted glass art installation (as you can see in some of the images).