information
COVID-19 Safety, Recovery and Resilience

Face coverings are required in indoor public spaces and many outdoor spaces. State policy
Access City programs, people and projects helping Portland recover. Portland United

Volunteer. Play. Stay. Shop. Show the Rose City a little love. Here for Portland

Residential Infill - Conversions and the Building Code

Guide
Converting a structure with one or two dwelling units to one with three or more units can trigger additional building code requirements.

Commercial Building Permit requirement

Upgrading from a house or duplex to three or more units could require a Commercial building permit, and your project must follow the commercial building code, which has different requirements than the residential code.

Commercial building code requirements include details such as:

  • Sprinkler systems
  • Increased fire rating of exterior walls based on distance from the property line
  • Window and door opening limitations based on the property line

NOTE:  Applicants can seek relief or alternatives to these requirements through a building code appeal process.


Seismic Upgrade Required

Change of occupancy from a house or duplex to 3 or more units will trigger a seismic upgrade under City Code Chapter 24.85 (i.e. change of occupancy from R-3 occupancy to R-1 or R-2).