Here's a link for [[https://www.portland.gov/ppd/building-permit-estimates|estimating permit costs]]

Here's a link for [[https://www.portland.gov/ppd/early-assistance/15-minute-question-appointments|free 15 minute consultations]] with the city.

Here's a link to the [[https://www.portland.gov/sites/default/files/code/110-sd-zone_3.pdf|building code for single family dwellings]].