Something surprising has happened with many so-called “sustainable” buildings. When actually measured in post-occupancy assessments, they’ve proven far less sustainable than their proponents have claimed. In some cases they’ve actually performed worse than much older buildings, with no such claims.
A 2009 New York Times article, “Some buildings not living up to green label,” documented the extensive problems with many sustainability icons. Among other reasons for this failing, the Times pointed to the widespread use of expansive curtain-wall glass assemblies and large, “deep-plan” designs that put most usable space far from exterior walls, forcing greater reliance on artificial light and ventilation systems.

Before its cancellation, the Anara Tower was planned to be one of Dubai’s tallest buildings, and an icon of sustainability — despite its west-facing glazing, high embodied energy in materials, and, remarkably, a giant non-functional (i.e. decorative) wind turbine. The building offered the consumer packaging of an “image” of sustainability at the apparent expense of real sustainability. Illustration by WS Atkins PLC.
Partly in response to the bad press, the City of New York instituted a new law requiring disclosure of actual performance for many buildings. That led to reports of even more poor-performing sustainability icons. Another Times article, “City’s Law Tracking Energy Use Yields Some Surprises,” noted that the gleaming new 7 World Trade Center, LEED Gold-certified, scored just 74 on the Energy Star rating — one point below the minimum 75 for “high-efficiency buildings” under the national rating system. That modest rating doesn’t even factor in the significant embodied energy in the new materials of 7 World Trade Center.
Things got even worse in 2010 with a lawsuit [“$100 Million Class Action Filed Against LEED and USGBC”] against the US Green Building Council, developers of the LEED certification system (Leadership in Energy and Environmental Design). The plaintiffs in the lawsuit alleged that the USGBC engaged in “deceptive trade practices, false advertising and anti-trust” by promoting the LEED system, and argued that because the LEED system does not live up to predicted and advertised energy savings, the USGBC actually defrauded municipalities and private entities. The suit was ultimately dismissed, but in its wake the website Treehugger and others predicted, based on the evidence uncovered, that “there will be more of this kind of litigation.”
What’s going on? How can the desire to increase sustainability actually result in its opposite?
One problem with many sustainability approaches is that they don’t question the underlying building type. Instead they only add new “greener” components, such as more efficient mechanical systems and better wall insulation. But this “bolt-on” conception of sustainability, even when partially successful, has the drawback of leaving underlying forms, and the structural system that generates them, intact. The result is too often the familiar “law of unintended consequences.” What’s gained in one area is lost elsewhere as the result of other unanticipated interactions. Read more