Nonprofit community organization Greensburg GreenTown, established to help the residents of Greensburg, Kan., recover and rebuild their community sustainably after an EF5 tornado leveled the town in 2007, has extended the entry period for its Chain of Eco-Homes design competition through Aug. 15, 2009.

The competition invites architects, designers, intern architects, students, and others, including creative nonprofessionals, to design two- to three-bedroom single-family houses using one of three disaster-resistant and green wall systems. One $10,000 grand prize-winner and two runners-up will be chosen. The winning designs will be built in Greensburg as part of the community's Chain of Eco-Homes Project and will be featured on the FreeGreen website, where they will be available for download by anyone free of charge.

Competition judges include: Michelle Kaufmann, AIA, LEED AP; Allison Arieff, editor-at-large, Sunset magazine and columnist for The New York Times; Lloyd Alter, columnist for and associate professor at Ryerson University in Toronto; Ron Jones, CEO of Green Builder Media; Steve Hewitt, Greensburg city administrator; and Ben Uyeda, chief architectural officer and university lecturer. Winners will be announced Oct. 15, 2009.

Read our original coverage of the competition announcement here.