About Us +
Researchers in the Building Technology & Urban Systems Division (BTUS) at Lawrence Berkeley National Laboratory develop data and technologies that increase energy efficiency and improve the health, safety and comfort of building occupants, in the United States and worldwide.

We work closely with industry partners, academics and government officials to achieve these goals, and share our research widely
Research +
We are at the forefront of cutting-edge research that redefines building technology and explores all areas of urban systems.

We have been leaders for decades in developing energy-efficient windows, improving indoor air quality, coming up with new ideas to fix the nation's electricity grid, and so much more.

Visit our research areas at the right to find out more.
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Publications +
Enjoy presentations from Building Technology & Urban systems research experts on a wide variety of topics in the areas of building energy efficiency, the electricity grid and how it relates to buildings and much more.
- Presentations
News
Tools & Guides +
Explore our tools, guidebooks and software and download for free.

We offer a variety of technologies designed to simulate and model real-world circumstances to assist in energy-saving programs and help building owners build better buildings. These tools can help calculate performance of building systems like windows and shades, help consumers and builders pick the best windows for a variety of applications and much more.

Publications

Publications By Research Area

2020

Issler, Paulo, Paul A. Mathew, and Nancy Wallace."The Pricing Risk of Energy Use Intensity for Office and Multifamily Mortgages." (2020). DOI

2019

Mathew, Paul A., Philip Coleman, Janie Page, Cynthia Regnier, Jordan Shackelford, Greg Hopkins, Matt Jungclaus, and Victor Olgyay."Energy Efficiency and the Real Estate Lifecycle: Stakeholder Perspectives." (2019).

2018

Mathew, Paul A., Nancy Wallace, Paulo Issler, Baptiste Ravache, Philip Coleman, and Cindy Zhu."Do energy costs really affect commercial mortgage default risk? New results and implications for energy efficiency investments."2018 Summer Study on Energy Efficiency in Buildings (2018). DOI

Mathew, Paul A., Cynthia Regnier, Travis Walter, and Jordan Shackelford."ComEd – LBNL ‘Beyond Widgets’ Project Automated Shading Integrated with Lighting and HVAC Controls System Program Manual." (2018).

2017

Robinson, Alastair, Paul A. Mathew, Cynthia Regnier, Peter Schwartz, Jordan Shackelford, and Travis Walter."California Publicly‐Owned Utilities (POUs) – LBNL ‘Beyond Widgets’ Project Task‐ambient lighting and occupancy‐based plug load control System Program Manual ." (2017).

Wallace, Nancy, Paulo Issler, Paul A. Mathew, and Kaiyu Sun."Impact of Energy Factors on Default Risk in Commercial Mortgages." (2017).

Mathew, Paul A., Kaiyu Sun, Baptiste Ravache, Paulo Issler, and Nancy Wallace."Impact of Energy Use and Price Variations on Default Risk in Commercial Mortgages: Case Studies." (2017).

2016

Mathew, Paul A., Nancy Wallace, Elena Alschuler, and Leonard Kolstad."Commercial mortgages: An underutilized channel for scaling energy efficiency investments?."ACEEE (2016).

Mathew, Paul A., Philip Coleman, Nancy Wallace, Paulo Issler, Lenny Kolstad, and Robert Sahadi."Energy Factors in Commercial Mortgages: Gaps and Opportunities." (2016).

2009

Coffey, Brian E., Sam Borgeson, Stephen E. Selkowitz, Joshua S. Apte, Paul A. Mathew, and Philip Haves."Towards a Very Low Energy Building Stock: Modeling the U.S. Commercial Building Sector to Support Policy and Innovation Planning."Building Research & Information (2009).

Coffey, Brian E., Sam Borgeson, Stephen E. Selkowitz, Joshua S. Apte, Paul A. Mathew, and Philip Haves."Towards a Very Low Energy Building Stock: Modeling the US Commercial Building Stock to Support Policy and Innovation Planning."Building Research and Information 37:5 (2009).