Stereolithography To the Max

The 3D plotters of today put down layer upon thin layer of plastic to create 3D models. The models are limited to a size that fits inside the 3D plotter, typically a cubic foot.

At the University of Southern California’s Rapid Prototyping Laboratory, B. Khoshnevis is working on a house-size 3D plotter, called "contour crafting" and "selective inhibition of sinterin."

To get an idea of CC, check out this page, and then scroll down to the end of the page for some rendered images of how houses might be built.