Unique Traditional Prefab House, Landhouse by Mark Merer. Below, we present a home that is designed to blend with the natural form. Houses with a unique shape, blinded by the main elements of wood, stood in the midst of natural locations, greener pastures. Building a house is called the Landhouse. One example of the Swinomish Landhouse housing project is built with environmentally friendly home ideas, inspired by the Swinomish Tribe People ‘of Fidalgo Island Washington State. Landhouse designed by Mark Merer. Landhouse is a prefabricated house that was built from a SIP (structural insulated panels). This house has a flexibility which could be running as well as what is desired by the homeowner as well as energy efficient.