The Greenest Commercial Building in the World

The goal of the Bullitt Center is to drive change in the marketplace faster and further by showing what’s possible today. The era of harm reduction, half steps, and lesser evils is behind us. As a society, we need to be bold in ways that were once unimaginable.

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Case Study: Living Proof

What it took to design and build the Bullitt Center, by Rob Pena

Materials: As-built product list

The Bullitt Center team worked for 2+ years identifying products without Red List chemicals.

Media Coverage

Media outlets around the world have covered the Bullitt Center. Review them here.


Net Positive Energy Over First Decade

The Bullitt Center Generated 30% More Energy Than It Used in Its First 10 Years Building shows what’s possible...

Oct 1: National Solar Tour

As part of the National Solar Tour, the Bullitt Center will be offering tours this Saturday, October 1, 2022...

Composting Toilets: Lessons Learned

The Bullitt Center was designed to show what’s possible. It is exploring scores of new ideas in an effort...


Bullitt Center

Tour the Bullitt Center Virtually

Look under the hood to see how it works

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250 years: Lifespan of the building

14,303 sq.ft.: Area of solar array

16 kBtu/sq.ft./yr: Energy Use Index

400 feet: Depth of geothermal wells

50,000 gal: Size of cistern

362: Toxic chemicals on “red list”

99 out of 100: WalkScore for site

26: # of geothermal wells

950 sq.ft.: Size of rainwater cistern

82%: Interior with natural daylight