JOIN
THE
Building Challenge
20
Passive
House
Buildings
20,000
Square Feet
Or Larger
By
2020
In King County
Get ahead of the carbon curve.
Build tomorrow's buildings today.
The 20 by 2020 Building Challenge will provide “proof of concept” that healthy, super-efficient buildings make economic sense and can propel our shift to a carbon-sustainable future.
20 by 2020 Building Challenge Partners
