Which architectural firm first introduced 'value-based pricing' for sustainable design elements, charging premium rates based on projected energy savings rather than construction costs?

In the world of architecture, pricing strategies for landmark projects can be as innovative as the designs themselves. Some architectural firms have pioneered novel approaches to value-based pricing, while others have set industry standards with their fee structures. This trivia question explores a significant pricing innovation that changed how architectural services are valued in high-profile projects.

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Foster + Partners, with their pricing model for the Hearst Tower in New York (2006)
Gensler, with their 'EcoMetrics' pricing system for PNC Tower in Pittsburgh (2009)
Skidmore, Owings & Merrill (SOM), with their sustainability premium for the Pearl River Tower (2011)
Bjarke Ingels Group (BIG), with their 'Hedonistic Sustainability' fee structure (2013)