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The City of Portland, Oregon

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City of Portland

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24.75.010 Uniform System.

(Amended by Ordinance No. 188995, effective July 6, 2018.)

A.  There is established a uniform system of numbering all buildings in separate ownership or occupancy in the City dividing the City into six addressing districts.  In establishing the system Williams Avenue, Naito Parkway, View Point Terrace and Tryon Creek State Natural Area and the centerline of the Willamette River southerly from Oregon Street and northerly from Clay Street, shall constitute the north and south base line from which the numbers on all buildings running easterly and westerly from said streets shall be extended each way, upon the basis of one number for each ten feet of property frontage, wherever possible, starting at the base line with the number 1 continuing with consecutive hundreds at each intersection, wherever possible.

B.  All even numbers shall be placed upon buildings on the southerly side of streets, avenues, alleys and highways, and all odd numbers shall be placed upon buildings on the northerly side of streets, avenues, alleys and highways.  Burnside Street shall constitute the east and west base line from which the numbers on all streets running north and south from said streets shall be extended each way, upon the basis of one number for each 10 feet of property frontage, wherever possible, starting at the base line with number 1 and continuing with consecutive hundreds at each intersection, wherever possible.  All even numbers shall be placed upon buildings on the easterly side of streets, avenues, alleys, and highways, and all odd numbers upon buildings on the westerly side of said streets, avenues, alleys, and highways.  Freestanding buildings on private streets which are separately owned or occupied shall be separately numbered so as to most closely conform to this system.  Each portion of a building which is separately owned or occupied and has a separate entrance from the outside shall have a separate number assigned to it.

C.  Suffixes to Building Numbers.  Where building address requirements exceed numbers available within the numbering system, the Director may use the suffix “A”, “B”, “C”, etc. as may be required to provide the numbering required by this Chapter.