The Building Technologies Office develops, demonstrates, and accelerates the adoption of cost-effective technologies, techniques, tools and services that enable high-performing, energy-efficient and demand-flexible residential and commercial buildings in both the new & existing buildings markets, in support of an equitable transition to a decarbonized energy system by 2050, starting with a decarbonized power sector by 2035. Learn more about BTO.

News, Blogs, and Success Stories

DOE Issues New Building Energy Code Determinations
Latest codes expected to save $138 billion
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It's Alive! After Five Years in the Lab, Spawn (of EnergyPlus) is Finally Here
For the past five years, DOE and the national labs have been developing a next-generation simulation engine that bridges the worlds of BEM and controls. In May of this year, Spawn, was released as part of the Modelica Buildings Library.
July 26, 2021
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Secretary Granholm Announces New Building Energy Codes To Save Consumers Money, Reduce Impacts Of Climate Change
New Standards Will Save $138 Billion in Energy Costs, Reduce Energy Use and Climate Impacts of U.S. Homes and Buildings
July 21, 2021
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EnergyPlus Turns 20!
On April 12, 2021 EnergyPlus, DOE's flagship BEM engine celebrated its twentieth birthday. Several of those who were there at the beginning look back at those early days and remark on the changes they've seen in the last two decades.
July 17, 2021
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DOE Intends to Issue a Funding Opportunity that Accelerates the Renovation of Buildings with Energy-Efficient Innovations
DOE announces its intent to issue a funding opportunity for Advanced Building Construction
July 16, 2021
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BTO's Program Areas

Strategic Initiatives and Partnerships

Grid-Interactive Efficient Buildings
We’re conducting Grid-interactive Efficient Buildings research to help bring connectedness and the related energy savings across the buildings sector.
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Advanced Building Construction Initiative
The ABC Initiative integrates energy-efficiency solutions into highly productive U.S. construction practices for new buildings and retrofits.
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Energy, Emissions and Equity (E3) Initiative
Better Energy, Emissions, and Equity (E3) Initiative
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Technology-to-Market
T2M activities accelerate innovative R&D concepts to become commercially viable and available products.
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Better Buildings
Partners in DOE’s Better Buildings Initiative set ambitious goals and contribute real-world solutions that help accelerate our clean energy economy.
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Resource Dashboard

Find technical reports, technology roadmaps, fact sheets, relevant and authorizing statutes, and quick links to BTO’s decision tools.

Project Map

The Building Technologies Office Projects Map is a searchable table and map of BTO’s active projects that have been competitively awarded and funded through DOE’s national labs all across the United States. Dive into any project to learn more about its funding amount, who’s leading the work, the project term, what the project is developing, and its most recent progress.

Map of Solar Projects

BTO’s Annual Peer Review Conference

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The Peer Review is BTO’s signature event for the building sector’s leading scientists, engineers, policymakers, and other energy enthusiasts to discuss the latest opportunities for improving building performance–and to evaluate the progress of select BTO-funded research, development, demonstration, and deployment projects and programs. The Peer Review is free and open to the public.

Learn more about the next Peer Review event.