Oregon is located in the Cascadia Subduction Zone which makes the area prone to seismic activity. Older buildings, especially those built before the 1980s, were not designed to resist the shaking and movement created by a large earthquake and could be severely damaged. However, homes can be reinforced easily and inexpensively.
Building permits and inspections of seismic upgrades are not required in unincorporated Washington County. However, Building Services issues permits for voluntary residential seismic upgrades when requested. These permits can document upgrades for resilience analysis and confirm installation of seismic resistive devices.
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