City of Portland, OregonIdentifies properties designated as contributing or non-contributing in a historic or conservation district. -- Additional Information: Category: Development Purpose: To protect properties with designated historic value. Update Frequency: As Needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=54370ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/003e2d273d2f43f28b52ae224b27f38b_123engPortlandMaps Open DataPublicHistoric and Conservation District Status [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2025-12-02