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Portland's historic district overlays apply only to specific listed districts (Eastmoreland, Irvington, Ladd's Addition, Pearl District/Central City) plus individually listed Historic Resource Inventory properties. In those areas, Type II Historic Resource Review adds 4-6 weeks before BDS will issue a permit. Outside those areas, standard residential roofing permits issue in 5-7 business days. The complexity score reflects this binary: design-review-required vs. routine.
The tool routes your address (or ZIP) to the closest of 10 PDX cost markets. The permit data for that market reflects published BDS guidelines and county fee schedules. For exact verification of your specific property — particularly historic district status — confirm at portlandmaps.com using your address. Some properties on the Historic Resource Inventory are individually listed even outside formal historic districts.
Portland's formal review process for visible material changes on properties in listed historic districts or individually listed on the Historic Resource Inventory. The Historic Landmarks Commission evaluates proposed material, color, and profile against district character standards. Cedar shake retrofit-in-kind clears fastest (3-4 weeks); architectural asphalt conversion or non-traditional metal colors take 6-9 weeks with multiple revision cycles.
Pearl District falls under Portland's Central City design review overlay, which applies to all visible roofing changes regardless of material. The review is parallel to standard BDS permit and applies to TPO membrane color, parapet detail, and any changes visible from public right-of-way. Most Pearl projects also involve HOA architectural review running in parallel. Plan 4-8 weeks total for design + permit before installation can begin.
No — different jurisdictions. Beaverton and absorbed Washington County areas use Washington County permitting (5-8 business days, modestly higher fees than Multnomah County). Lake Oswego has its own city permit plus active HOA design review across most subdivisions (Country Club, Lake Forest, First Addition mandate cedar retrofit-in-kind). Pearl, Hawthorne, Sellwood-Moreland, etc. use Multnomah County / Portland BDS.