Borstein provided the co-invest equity required to develop the former Howard Hughes defense site in 2002 as well as debt financing for an additional 115 single family lots in 2011 on the remainder parcel. Two million square feet of concrete and steel buildings were demolished, with most materials recycled or salvaged. Amerige Heights is pedestrian friendly and has been honored with several design awards. Residential types include luxury estate homes, traditional single-family residences, apartments, alley-loaded residences and attached homes. Trails and paseos link homes to shopping, schools, parks and open space, including a 10-acre sports park and community activities building. An 82.5-acre mixed-use district holds 1.28 million square feet of development, including retail, office and light industrial uses. It was recognized as the 2004 Project of the Year by the Orange County branch of the American Society of Civil Engineers.