Solar Decathlon Past Events

The U.S. Department of Energy Solar Decathlon Build Challenge dates back to the inaugural event in 2002. Since then, the Build Challenge has been held biennially in 2005, 2007, 2009, 2011, 2013, 2015, 2017 and 2020. The Design Challenge first began as a DOE student design competition in 2014. It was held annually until 2018, when it became a Solar Decathlon annual event called the Design Challenge.

Learn about past competitions, find out how past competition houses are being used today, or plan a visit to a Solar Decathlon house near you.

Past Design Challenges

Find previously held Design Challenges.

Past Build Challenges

Find previously held Build Challenges.

Solar Decathlon 20^th Anniversary

Explore 20 years of the Solar Decathlon.

Where Are the Solar Decathlon Houses Now?

Solar Decathlon House Tours