These opportunities exist in many aspects of the design and construction phases and include choice of building material, waste disposal, and contractor.
Green building advocates less new construction.
In addition to consuming building materials, new construction contributes to urban sprawl impacting open space, habitat, water resources, and transportation. Consider expanding your existing house. If a move is necessary, consider purchasing an existing house that is near public transportation, work, shopping, and other services. Downsize new construction. If you decide on building a new house, strive to construct a smaller house.