More LEED-certified buildings are being developed than ever, as it seems to be a new standard for luxury condominiums. Here are three of the newest and most eco-friendly buildings in Manhattan, all perfectly designed with environmentally-friendly practices in mind.

40 East End Avenue currently via Google Maps

A low-rise rental building at 40 East End Avenue was just purchased by Lightstone Group who plan to convert the building from rentals to condominiums.

East 74th Street via Google Maps

A new massive Upper East Side development is underway from Thor and Premier Equities. Located on Third Avenue, the development will be comprised of three five-story buildings that will be renovated into 31-story towers.

The Upper East Side is renowned for its pedigree of Manhattanite refinement. To be sure, many of the neighborhood’s new constructions — such as those designed by Robert A.M. Stern — showcase a keen awareness of the area’s high-end history, and their architecture reflects this timeless appeal. Here’s a list of our four favorite, totally new constructions that combine refreshing design with the Upper East Side’s sophistication.

Distinguished international art dealers, the Wildenstein family, are set to sell their Upper East Side headquarters/townhouse. The limestone fronted building, located on 19 East 64th Street, was constructed in the depression era in 1929 and opened as a gallery in 1932. This sale is slated to be the most expensive sale in NYC, since the $88 million dollar penthouse purchased in 2011 by the daughter of a Russian fertilizer tycoon. This property was not listed, but had an unofficial asking price of $125 million.