Architect Mark Helder is completing ‘439 Metropolitan Green’, his first project as both designer and developer. The building is a high-performance LEED registered building located in Williamsburg, Brooklyn. Mark is committed to bringing highly energy-efficient, environmentally responsible design to the high-end as well as the lower income and affordable housing sector. Mark’s past projects include private homes, not-for-profit spaces, multi-family complexes, and commercial spaces. Mark Helder expanded his studio, Helder Design, from the Netherlands to New York in 2002. The work of Helder Design has been exhibited in the Chicago Architecture Foundation, the South-Eastern Center for Contemporary Design in South Carolina, Gallery 312 in Chicago, and the AIA Center for Architecture in New York City.