The Street Division is responsible for maintenance, repair, and snow plowing of local streets and cul-de-sacs. It is also responsible for maintaining traffic signals, street name and regulatory signs, storm sewer and ponding areas, pavement markings; and for tree trimming along boulevards, except commercial properties.

All county roads are the responsibility of Washington County; all state and interstate highways, the State of Minnesota. Traffic signs and signals are maintained and operated by the agency responsible for the adjacent roadways.