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Eco-roofs growing into urban role in Portland The Vanport Building at Portland State University has an eco-roof and solar panels. These features often compete for rooftop space. (courtesy of Mayer/Reed) As green roofs proliferate atop new buildings in Portland, landscape architects are learning lessons about what works and what doesn’t. In July 2020, the Portland City Council adopted the Central City 2035 plan. Among sweeping changes to the zoning code, new rules require eco-roofs atop buildings of 20,000 square feet or more in commercial zones within the Central City. Eco-roofs aren’t ...

Architect: Works Progress Architecture LLP Engineer: DCI Engineers General Contractor: Hoffman Construction Submitting Companies: Harsch Investment Properties and DCI Engineers Subcontractors: Acoustic Design Studio, Carlson Testing, Columbia Steel Services, Dallas Glass, Environmental Science Associates, Fire Protection Consulting, GeoDesign, Graelic, JLL Portland, Marion Construction, RWDI, R.F. Stearns Portland is renowned for its relatively small city blocks, as well as the large number of odd-shaped properties in the central city core, particularly those situated near the I-5 and I-84 fr...