Note: Corrections to the Affordability Contest results were announced Sept. 30, 2011.

Proving that the cost of “going green” is decreasing, two teams tied for first place in the U.S. Department of Energy Solar Decathlon 2011 Affordability Contest. Parsons The New School for Design and Stevens Institute of Technology (which includes Milano School of International Affairs, Management, and Urban Policy at The New School) built Empowerhouse for less than $230,000. Purdue University’s INhome came in at just less than $250,000. These teams earned 100 points for achieving a target construction cost of $250,000 or less, as evaluated by a professional cost estimator.

Like many of you, I have assembled everything from dining room tables to bunk beds with an Allen wrench and a beverage-stained set of black-and-white line drawings. I’ve even drilled new holes, convinced that the instructions had to be wrong, only to find out I had the board upside down—or inside out—or otherwise got caught up in some sort of “Tab A into Slot B” kerfuffle.

U.S. Department of Energy Solar Decathlon Director Richard King talks to student team members about their assembly progress.

Editor’s Note: This entry has been cross-posted from DOE’s Energy Blog.

In honor of the U.S. Department of Energy Solar Decathlon—which challenges 20 collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive—we are profiling each of the 20 teams participating in the competition.