See related story: Builders in a Strange Land

A brick building, made with Martian materials, could replace temporary housing, particularly landing modules, according to the Mars Homestead Project.
Courtesy of the Mars Homestead Project
This image depicts one possible use of a valuable lunar (or Martian) resource: large, subsurface lava tubes. Due to the much lower gravity on the moon and Mars, these cavern-like spaces could be more than 6 times the size of terrestrial lava tubes. They could shelter inhabitants from harmful radiation, said space illustrator Pat Rawlings.
Courtesy of Pat Rawlings/NASA