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The City of Portland, Oregon

Development Services

From Concept to Construction

Phone: 503-823-7300


1900 SW 4th Ave, Portland, OR 97201

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Locating an A2 assembly occupancy in most locations would require that the entire building be seismically upgraded. That is because the city's seismic regulations classifies an assembly occupancy at the highest hazard level, and most potential locations will have the legal occupancy grandfathered at a lower hazard level. In some cases, if the area being converted to an assembly occupancy would be no more than 1/3 of the building's total floor area AND the change of occupancy would add less than 150 occupants to the building, seismic improvement would not be required.

For more information on seismic triggers and your project, visit the Development Services Center or call a Life Safety Reviewer at (503) 823-1456.