This book presents a selection of sustainable homes built according to what is, today, feasible in the field of sustainable architecture, and shows us what alternatives are offered in this sense by current architecture. Once considered architectural curiosities, these houses, built in a way that respects the environment, lay the foundations of tomorrow's construction and invite us to consider that we cannot be satisfied with just pursuing our own quality of life, but that we must bequeath a future to our children and grandchildren in which they feel at home and in which enjoying a healthy and dignified environment is the norm.