Sander Architects designs homes that use prefabricated steel skeletons. The Los Angeles Times discusses the advantages of steel:

With costs below those of conventional building methods, quick and easy assembly and no termite issues, prefabricated or pre-engineered steel buildings are finding a place in the residential home market.

Homeowner Thomas Small explains part of his reason for choosing steel:

"Most of the metal in this house is recycled and will be recyclable at the end of its use in this house," Small said.

"And there's also very little waste with metal. It was made at the factory and then shipped here. There was no sawdust. No cutting," he said. "And we didn't have to hire specialized builders. It was built by the contractor who built the rest of the house, and bolted together very easily."

Firm principal Whitney Sander describes the process:

"It fits together like an erector set," Sander explained. "And it goes together in three weeks. The inside takes longer, but the prefabrication can save you months and thousands of dollars."

Some numbers from recent Sander Architects projects:

Two projects completed within the last year cost about $130 per square foot or about one-third of traditional custom residential costs, which can top $400 per square foot, according to Sander.

Small's construction costs were about $175 to $200 per square foot, compared with $120 to $350 for traditional non-custom homes, according to construction experts.

These sounds like impressive savings, though finishes and other construction unrelated to the steel skeleton play a large part in determining final construction costs. Read the complete article for more about Sander Architects and steel framing.