Under LEED-NC v2.2, Sustainable Sites Credit 5.1 it is necessary to determine whether the site is considered a greenfield or previously developed. Greenfield sites must limit site disturbance in a prescribed way. Previously developed sites must protect or restore 50% of the site area. Our project is a mixed use high-rise residential building with commercial space located in New York City located on two sites. Both sites were previously developed, but all buildings were cleared from one site by 1938 and form the other by 1983. The sites have long reverted to a vegetated state, populated with native or adapted species. However, it is unknown whether the sites have the same mix and density of species as were present before the original development. Please rule as to whether this would be considered a greenfield site or a previously developed site. Notes: SS 5.1 Ruling as of 10/07/2002 talks about previously agricultural land having established a "stable natural ecosystem"
The sites would both be classified as previously developed sites, as defined by the LEED-NC Reference Guide, page 70. "Previously developed sites are those that previously contained buildings, roadways, parking lots, or were graded or altered by direct human activities." Although the sites may have reverted to a vegetated state, it would not meet the classification of a greenfield, which are defined as sites not previously developed or graded, and remaining in a natural state. Applicable Internationally.