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Building solutions for climate change

Our mission is to decarbonize buildings for healthy and resilient communities.

Case Study Collection: Room Heat Pumps for Multifamily Retrofits

How do room heat pumps perform once they’re installed? Explore our room heat pump case studies.

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Local Law 97

Local Law 97

NYC’s groundbreaking climate legislation sets carbon emissions caps for large buildings that began in 2024.

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Explore our NYC building data hub

Learn more about NYC's buildings and their energy use in this interactive data hub.

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We educate building professionals

We train people who design, construct and operate buildings locally and nationally.

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Building Tomorrow: Conversations with Climate Solvers

Building Tomorrow demystifies complex ideas about buildings, and introduces you to the people doing the work!

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Upcoming events

Energy Code 101 [FULL]

November 16, 2026

Join this free 2-hour live, introductory training on the fundamentals of the 2025 NYS Energy Code.

What’s New in the NYS Energy Code

November 18, 2026

Join this free 90-minute live training for a clear, practical overview of the latest updates in the 2025 NYS Energy Code.

View Calendar

Recent publications

Year One Local Law 97 Results: Four key takeaways

In a major win for building decarbonization, 95 percent of covered buildings have filed LL97 reports and of those that filed we're seeing 95 percent compliance.

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NYC’s Grid in Transition

A historic boost in hydropower and offshore wind will transform NYC’s grid by 2028, as headwinds reshape the pathway to our long-term goals.

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Highlights of the 2025 New York City Energy Code

NYC adopted a new Energy Conservation Code in December 2025. Here’s what you need to know.

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LL97 Action Steps

Use our data tool to receive cost-effective steps you can take today to improve your building, avoid fines and comply with LL97 in 2030. 

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Explore the resource library

Videos and podcasts

Designing for a Regenerative Earth w/ David Gottfried

October 21, 2026

David Gottfried joins to discuss his upcoming book Regen 360: An Operating System for a Regenerative Earth.

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Financing energy upgrades with NYC C-PACE

September 30, 2026

How do you move from a feasibility study to a fully financed retrofit?

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People Positive: The social impacts of climate work

September 9, 2026

In this episode of Building Tomorrow, we speak with author Gayathri Unnikrishnan about her new book, People Positive.

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All videos and podcasts