Addressing and Premise Identification

Addressing and premise identification are an integral part of an emergency response system, allowing responders to efficiently respond to all types of emergencies without delay. The following information details how properties and buildings are addressed and provides instructions for the installation of address and premise identification.


2014 Oregon Fire Code as amended by the City of Hillsboro HMC 11.28.010 §505.1, 505.2, City of Hillsboro HMC 11.32.050, 9.28.020, 9.28.040.


Complex – Three or more buildings on a single parcel.
Complex Map – A visual representation of a complex in plan view denoting the location of buildings, building designations, access roadways, and other features required by the fire code official.  
Flag Lot – A lot so shaped that the buildable area (the “flag”) is not adjacent to the street or alley on which the lot fronts, and which includes a private access strip (the “pole”) connecting the buildable area to the street or alley.
Monument Sign – Permanently installed sign visible to the public that provides addressing and premise identification as required by the fire code official.

Address Designation/Assignment

Properties within the City of Hillsboro city limits are assigned an address by Hillsboro Planning Department using a standard method.  No person may use a number other than the one assigned by the Planning Department. The City of Hillsboro does not assign ZIP codes, which are assigned by the United States Postal Service.  (HMC 9.28.020)

  • The City of Hillsboro uses an street grid, which originates at 1st Avenue and Main Street in Downtown Hillsboro with four quadrants with the following prefixes: 
    • NE - north of Main Street and east of 1st Avenue
    • NW - north of Main Street and west of 1st Avenue
    • SE - south of Main Street and east of 1st Avenue
    • SW - south of Main Street and west of 1st Avenue
  • There are additional prefixes unique to Main Street and 1st Avenue and include:
    • N and S - north and south of Main Street on 1st Avenue
    • E and W - east and west of 1st Avenue
  •  Property numbers are assigned sequentially in conformity with the existing pattern established by the street grid beginning with the number 100.
  • Even numbers are assigned on the east side of each north-south street and on the south side of each east-west street with odd numbers assigned on the opposite sides of each.  
  • Addresses are issued based on the primary street access point (front door/main entrance, primary vehicle access, ???) - add graphic

Complex Addressing

  • Each building will have at least one unique address number.  Buildings may be issued additional address numbers if there are ground level exterior doors for multiple tenants.  
  • Where there are multiple buildings accessed from an internal drive aisle, addresses are issued in a sequential clockwise direction based on existing addresses. Address will not alternate.  - add graphic
  • Shell addresses.

Suite Addressing

  • Suites with an direct external access are issued a unique address number.
  • Suites with internal access only are issued a suite number based on the floor level.  First floor suites are issued a 100 series number, second floor suites are issued a 200 series number and so on. 
  • Suite letters are no longer assigned, but may be preexisting.

General Requirements

All premises shall have approved address numbers, building numbers, unit/suite designations or other approved identification placed so as to be plainly legible from the street or road fronting the property.

  • Be made so as to contrast with its background.    
  • Be composed of Arabic numbers or alphabetical letters.
  • Be positioned at a minimum of 80 inches above grade.
  • Be internally or externally illuminated at night an intensity of not less than 5.0 foot-candles.




General  6 inches  1 inch
Greater than 50 feet from right-of-way  12 inches  2 inches
One- and two-family dwelling  4 inches  0.5 inch
Range of building address numbers  12 inches  2 inches
Suite   6 inches  1 inch

Monuments, Poles or Signs

If access is via private road and the building cannot be easily seen from the public right-of-way, a monument, pole or other sign shall be used to identify the structure.

Buildings with multiple addresses and suites shall provide a monument at the primary entrance with additional signage on each building indicating the address range of the building and the location of each suite.

ComplexesPremise Identification Sign

A premise map shall be installed at the primary vehicle entrance into the complex. The address of the complex and each building shall be noted on this map at a minimum.

Timing of Installation

Address numbers shall be installed prior to occupancy of any new or existing building.

Construction Sites

Address signage shall be provided at each entrance to the site. If there are multiple buildings being constructed, a temporary premise map showing the location and designation of each building shall also be provided. All signage shall be of an approved size, be weather resistant, and be maintained until replaced by permanent signage.