"Since 1950, the average house size in the U.S. has more than doubled, even while the average family size has steadily shrunk. We’re providing more square footage per family member than ever before... As house size increases, resource use in buildings goes up, more land is occupied, ... construction costs rise, and we use more energy. For single family houses, small is beautiful in terms of environmental performance."

Alex Wilson, "Small is Beautiful: House Size, Resource Use, and the Environment," Environmental Building News, January (1999): 1, 7-13
 
   
Built on a slope to the sea, this 800 square foot home by Malibu architect Jim Mount
includes a two car garage, large decks, and a masonry fireplace.
Matt Kilvin, Santa Monica architect, designed this small two bedroom,
two bath house with a cantilevered deck on three sides.
It is shown here under construction.