For beginners and owner-builders, green building is a sustainable construction method that has a low impact on the environment. Green buildings usually incorporate LEED standard construction requirements in order to become certified; however, a homeowner can be an "owner builder" and construct their own home without the need of hiring a General Contractor in many cases, plus they usually do not need certification even if they build to LEED standards. Although standard construction methods and materials are often used, such as 2x4 or 2x6 framing with fiberglass insulation, or SIP panels, alternative construction materials like straw bales, adobe, earthbags, rock, or other new, used or salvaged materials can be combined in a way that both eco-friendly and non-toxic, plus it can save money. The energy efficiency of a home, when designed well, can be as much as 90% efficient, cutting utility bills to an extreme. A tiny house or small "core house" (with all the living essentials--kitchen, bath, living/sleeping area) can be designed into the floorplan wall system so the owner-builder can add on extra bedrooms later on. This helps them construct a house in a shorter time so they can move in sooner, saving money and even being mortgage-free, if chosen. Energy efficient homes that are truly sustainable incorporate superinsulation and thermal mass along with passive solar home design, and this book explains how to do that. This book offers a passive solar home companion e-book (v1) that can be downloaded free from the author's website.