Reinventing Green Building
About this book
#### About the Author Jerry Yudelson occupies a singular position in the green building world. Dubbed "The Godfather of Green" by *Wired* magazine in 2011 — a title he subsequently embraced as the name of his 2020 memoir — Yudelson has been involved in sustainable development since the earliest days of the modern environmental movement. He pioneered Earth Day activities at Caltech in 1970, taught some of the first university courses in environmental studies, and went on to accumulate a remarkable institutional dossier: B.S. in Engineering from Caltech, graduate degrees from Harvard and the University of Oregon, service as director of California's SolarCal Office under Governor Jerry Brown in 1978, training of more than 3,500 professionals in LEED standards, membership in the inaugural class of LEED Fellows in 2011, and the presidency of the Green Building Initiative from 2014 to 2015.
He has authored fourteen books on green building, sustainable design, and water conservation. By the time *Reinventing Green Building* appeared in 2016, Yudelson was not an outsider lobbing critiques at a system he had never participated in — he was its most decorated and experienced insider. This matters enormously to the book's credibility: when someone who helped build the American green building certification ecosystem argues that it has fundamentally failed, the argument deserves careful attention. #### The Central Argument: A System Falling Short The book opens with a stark diagnosis.
Despite more than two decades of development, promotion, and investment, green building certification systems — primarily LEED (Leadership in Energy and Environmental Design), administered by the U.S. Green Building Council — had achieved market penetration of less than 4 percent of commercial and residential structures in the United States and Canada by 2015. In absolute numbers, approximately 35,000 buildings had achieved LEED certification out of an estimated 5.5 million commercial buildings — a certification rate of under 0.7 percent of commercial stock.
Broader estimates including residential properties still landed below the 4 percent threshold. Against this backdrop, the ambitions enshrined in the "2030 Challenge" — the global initiative calling for all new buildings to be carbon-neutral by 2030 and for existing buildings to achieve 50 percent reductions in energy consumption — appear not merely ambitious but disconnected from the actual trajectory of the market. Buildings, Yudelson notes, constitute the largest single source of greenhouse gas emissions worldwide.
If the construction and operation of buildings cannot be transformed at scale, meaningful climate mitigation becomes effectively impossible. Yudelson argues that this failure is not incidental — it is structural. The certification systems themselves, in their design and operation, contain features that actively limit their own adoption: - **Cost and complexity**: LEED certification processes require significant expenditure in documentation, consulting fees, and administrative burden.
This makes certification economically prohibitive for smaller projects, budget-constrained developers, and building types where the financial incentives for certification are weak. - **Process focus over performance**: Certification systems typically reward the intent and design of buildings rather than their measured operational performance. A building can achieve LEED Platinum status based on design projections that may never materialize in real-world conditions. Yudelson — whose philosophy is captured in his maxim "It's all about performance, not promise.
Show me your numbers" — finds this approach both intellectually dishonest and practically counterproductive. - **New construction bias**: The overwhelming majority of certification activity is directed at new buildings, which represent only a small fraction of annual construction activity and an even smaller fraction of total building stock. The vast majority of buildings that will exist in 2030 already exist today. Any credible strategy for climate mitigation through the built environment must primarily address the existing building stock, not new construction. - **Documentation burden**: The administrative requirements for certification consume enormous resources that could otherwise be devoted to actual building performance improvement. #### Looking for Solutions The book's second and largest section examines the landscape of possible solutions, drawing on examples from around the world and from adjacent industries.
Yudelson's core proposal is the development of what he envisions as a new generation of green building approaches — sometimes framed as "Green Building 3.0" — that prioritize five transformative technologies: 1. **Internet of Things (IoT)**: The emergence of billions of connected sensors embedded in building systems, equipment, and components creates unprecedented opportunities for real-time monitoring of energy consumption, water use, indoor air quality, occupancy patterns, and system performance. Buildings equipped with IoT infrastructure can provide continuous, granular data rather than the snapshots captured by periodic audits. 2. **Cloud Computing**: The ability to aggregate, store, and analyze building performance data in the cloud enables comparative benchmarking across thousands or millions of buildings simultaneously, identifying performance outliers and best practices at a scale that was previously impossible. 3. **Mobile Devices and Open Systems**: Smartphone and tablet interfaces make building performance data accessible to facility managers, building operators, and occupants in real time, enabling responsive management rather than retrospective reporting. 4. **Big Data Analytics**: Predictive analytics applied to building performance data can identify patterns, anticipate failures, optimize system operation, and suggest targeted interventions — transforming buildings from passive consumers of energy and resources into intelligently managed systems. 5. **Affordable Sensor Networks**: The dramatic reduction in the cost of environmental and energy sensors makes comprehensive monitoring economically viable even for smaller buildings and budget-constrained projects. Together, these technologies enable what Yudelson calls a data-driven approach to green building: one that focuses on measured outcomes rather than design intentions, that can dramatically reduce the cost of demonstrating performance, and that can scale to cover the existing building stock rather than only new construction.
His projections suggest that a technology-enabled certification system could reduce documentation and certification costs by 90 percent or more, potentially achieving market penetration of 50 percent of all buildings by 2025 — a transformation of several orders of magnitude beyond what current systems have achieved. #### The Vision for Green Building's Future Yudelson's prescriptions extend beyond technology. He advocates for: - **Mandatory building energy performance disclosure**: Requiring building owners to disclose measured energy consumption data at the point of sale or lease, analogous to automotive fuel economy labels. This creates market incentives for performance improvement without requiring the costly administrative apparatus of voluntary certification. - **Energy benchmarking programs**: Portfolio-level energy benchmarking — already implemented in some cities — enables performance comparisons across buildings of similar type, vintage, and climate zone, identifying the worst performers and creating pressure for improvement. - **Redesigned certification systems**: If certification is to continue, it must be redesigned around user experience, cost efficiency, and measured performance.
The proliferation of competing certification schemes (LEED, BREEAM, Green Star, WELL, ENERGY STAR, and others) creates market confusion and administrative overhead; rationalization and simplification are needed. - **Focus on energy use intensity (EUI)**: Rather than checklists of design features, certification should center on a single, measurable, comparable indicator of building performance: energy consumed per square foot per year. #### Significance and Reception *Reinventing Green Building* was recognized as one of the most important and useful green building texts of its year. Its significance lies not in its argument that current systems are imperfect — that would be unremarkable — but in its insider credibility, its systematic diagnosis of structural failures, and its practical, technology-grounded vision for transformation. Yudelson was careful not to dismiss the concept of green building certification itself: he believed that measuring and recognizing building performance remained essential.
His critique was directed at the design of current systems, not the principle behind them. The book appeared at a moment when several cities and states were beginning to implement mandatory benchmarking and disclosure ordinances, and when IoT and cloud technologies were beginning to mature into practical building management tools. Yudelson's proposals thus had a timeliness that complemented their strategic coherence.
For a green building database, *Reinventing Green Building* is essential reading not because it celebrates achievements, but because it honestly assesses failures and charts a credible path forward — making it valuable for anyone seeking to understand why the green building movement has not yet achieved its potential and what structural changes might unlock that potential. --- #