The rooftop garden mitigates the urban heat island effect by replacing what was a ballasted, black tar roof with green plants. The garden absorbs less heat from the sun than the tar roof, keeping City Hall cooler in summer and requiring less energy for air conditioning.

2022年3月24日 · Chicago City Hall’s greenroof saves $5,000 a year on utility bills, according to Michael Berkshire. “This is unique to Chicago,” said Richard Price of the Virginia-based William McDonough & Partners, the architectural firm who designed the roof.

2014年1月13日 · First planted in 2001, the City Hall rooftop garden was conceived as a demonstration project - part of the City's Urban Heat Island Initiative - to test the benefits of green roofs and how they affect temperature and air quality. The garden consists of 20,000 plants of more than 150 species, including shrubs, vines and two trees.

2011年6月11日 · Completed in 2001, this green roof tops the Classical Revival building that has served as the Chicago City Hall since it was completed in 1911. The building, which occupies an entire city block just south of the Chicago River, is an eleven-story rectangular structure with an open courtyard in its center.

The City of Chicago's Green Roof dataset and corresponding map provides the location, satellite images, and square footage of existing green roofs within the City of Chicago.

2010年4月21日 · One of the most impressive green roofs in the country is the one on top of City Hall in Chicago. Part of the impressiveness comes from the fact that the building is over 100 years old and was not designed specifically to allow for the additional weight of a green roof.

2022年3月31日 · The green roof on the Chicago City Hall building was installed as part of a Environmental Protection Agency study and initiative to reduce the urban heat island effect in the city and improve air quality. The one–block wide, twelve–story building had a substantial roof area that was ideal for planting and data collection.

Chicago, Illinois, was one of the first North American cities to construct a green roof pilot project. This case study is a investigation into the factors that shaped the project, the design process, its sequence of events construction and results of several informal investigations of how the …

2022年11月16日 · With over 500 green roofs and 13 rooftop farms, the city is one of the greenest in America, reaping the benefits of biodiversity, mitigating rainwater runoff and the urban heat island effect and saving thousands of dollars in utility bills.

The 20,300 square foot City Hall rooftop garden features over 20,000 herbaceous plants of more than 150 varieties, rainwater retention, and a supplemental irrigation system. It is estimated that the greenroof saves $5,000 a year on utility bills.