The expansion and reconstruction of a single-family home on an environmentally restricted site at the headwaters of the north branch of the Raritan River. The project involved the redesign of a sixties era two-bedroom ranch home to four bedrooms with upgraded kitchen, dining and living area, studio, family room, exercise area and three car garages. An extensive review and approval through DEP (Department of Environmental Protection) included stream encroachment and wetlands permits, transition buffer analysis and steep slope evaluations were required for approval. The finished building maximizes the expansion of this structure on this site as a onetime opportunity for this grandfathered building within the 150-foot wetlands buffer, and within five feet of the stream/river embankment. Home includes tall cathedral ceilings on the first floor, a freestanding decorative stair to the lower recreation level where a second master bedroom suite provides privacy for guests and returning children in this empty nester household. Single family homes and renovations are a regular component of the Kimmerle Group practice portfolio. Finding unique and creative solutions to residential expansions and upgrades has become a signature element of the practice, especially in existing and historic structures where the demands of today’s lifestyles require a new and insightful approach to the transitioning of these types of structures.