In 1993 the National Audubon Society, in conjunction with the Croxton Collaborative, renovated a building located in lower Manhattan to be their new headquarters facility.  The decision to renovate this 19th century structure was both cost effective and environmentally friendly.  The nine-story "Audubon House" has become a prime example of a design philosophy that elevates environmental and worker-health considerations on par with a building's structural and operational soundness.  The headquarters is 97,000sf and includes cleaner indoor air, softer lighting, lower energy bills, and more open work space.

Architects, engineers, and other design professionals worked as a team to come up with imaginative solutions and break from the predictable design patterns of most office buildings.  The work cost $142 per square foot, compared to $120 to $130 a square foot to renovate a typical Manhattan office building using conventional technology, but Audubon hopes to save $100,000 a year in energy costs by using 60% less energy than a conventional building of similar size.