2021 Solar Decathlon Design Challenge Highlights Creative, High-Performance Building Solutions
The 2021 Solar Decathlon Design Challenge — a U.S. Department of Energy (DOE) collegiate competition that tasks students with designing low-carbon, high-performance buildings powered by renewable energy — marked the competition's 19th year, with the first ever Virtual Village on the National Mall featuring nine builds with 3D renderings, diagrams and videos for each university's project.
Of the 72 competing teams, representing 12 countries, the University of Oregon was named the grand winner of the Commercial Divisions, and Northwestern University was named the grand winner for the Residential Divisions. Northwestern University's NuHome is a delicately balanced design that accounts for site challenges such as harsh winters and humid summers in Chicago, and a narrow footprint shaded by three-story buildings on both sides (making solar access more difficult for residential solar photovoltaics).
Despite these constraints, the student team was able to incorporate high-performance features such as a tight thermal envelope, highly efficient HVAC system, natural lighting and graywater reuse system. The design strategically reduces thermal bridging and effectively manages moisture (preventing mold and improving indoor air quality), and achieves a remarkable EUI rating of 12 and a HERS score of -22.
"The Solar Decathlon experience has no equal in terms of acquiring knowledge, and I absorbed so many fantastic design ideas from the student teams who presented throughout the weekend," noted Ray Tonjes, a seasoned juror and NAHB Sustainability and Green Building subcommittee past chairman. "It's an extremely worthwhile endeavor to have the opportunity to participate purely for the knowledge and interactions with like-minded participants."
As a proud sponsor of the Solar Decathlon, NAHB congratulates all the student teams and faculty for their hard work, innovative solutions, outstanding projects and, most of all, for leading the charge in the next generation of housing.
See DOE's press release for a full list of winners from this year's competition. To stay current on the high-performance residential building sector, with tips on water efficiency, energy efficiency, indoor air quality, and other building science strategies, follow NAHB’s Sustainability and Green Building efforts on Twitter.
Latest from NAHBNow
May 30, 2025
NAHB Members Provide Final Recommendations for New WOTUS RuleNAHB members concluded their participation in multiple “waters of the United States” (WOTUS) listening sessions with strong showings in Washington, D.C., and Salt Lake City. In total, 12 NAHB members and four staff members from NAHB and state home builder associations (HBAs), representing 11 states, provided oral statements at listening sessions.
May 30, 2025
Statement from NAHB Chairman Buddy Hughes on DOL Decision to Pause Job Corps Center OperationsNAHB Chairman Buddy Hughes issued the following statement after the Department of Labor announced it was pausing Job Corps center operations nationwide.
Latest Economic News
May 30, 2025
Multifamily Absorption Moves Lower for New ApartmentsThe percentage of new apartment units that were absorbed within three months after completion continued to trend lower, according to the Census Bureau’s latest release of the Survey of Market Absorption of New Multifamily Units (SOMA).
May 29, 2025
Treasury Yield Increase Drives Mortgage Rates Higher in MayMortgage rates continued their upward trend in May due to market volatility triggered by fiscal concerns and weaker U.S. Treasury demand. According to Freddie Mac, the average 30-year fixed-rate mortgage rose to 6.82% — a 9-basis-point (bps) increase from April. The 15-year fixed-rate mortgage increased by 5 bps to 5.95%.
May 28, 2025
Aging-in-Place Remodeling Work Fell While Familiarity and Receptiveness Remain HighOnly 56% of professional remodelers undertake projects designed to allow homeowners to Age-in-Place (AIP), according to results from NAHB’s Q1 2025 Remodeling Market Index (RMI) survey.