Starting August 1, 2021 the City of Portland zoning code grants additional development options to some properties zoned R7, R5, and R2.5. Some of these development rights require a property to have frontage on a street maintained by the City of Portland or the State of Oregon. A map showing pavement maintenance responsibility is available online at Pavement Maintenance Responsibility (arcgis.com).
The image below shows a full block with two streets maintained by the City (red) and two streets which have not been accepted for maintenance (yellow). The lots that have frontage on at least one City maintained street are colored green and are labeled "Yes." The lots which remain grey only have frontage on a street which has not been accepted for maintenance and are labeled "No."
Streets that have not been accepted for maintenance may be improved to minimum standards in order to be accepted. The improvement must be a full block length (from intersection to intersection). Payment of the Local Transportation Infrastructure Charge (LTIC) or improvements to a portion of a block do not qualify a street for maintenance by the City. For more information please visit Unmaintained Streets Pavement Review and Permitting Process | Portland.gov.