A dumpster that sits fully on private property, such as your driveway or a fenced job site, usually doesn't need a City permit. Things change once any part of it lands on a street, curb, planting strip, or sidewalk.
Inside city limits, Walla Walla treats anything left in the street or on a sidewalk without permission as an unlawful obstruction, and the director of public works can have it removed. Crews doing construction, demolition, or building upkeep next to the public right-of-way need a right-of-way protection permit from the City's building official. That protection must be in place before work starts and come down within 48 hours after the job ends.
The Public Works Department is at 55 E. Moore Street and is open Monday through Friday, 8 a.m. to 5 p.m. Call 509-527-4463 before you pick a delivery date. Outside city limits, in unincorporated Walla Walla County, the county engineer handles obstruction permits for county roads instead.
If you aren't sure which side of the line your address falls on, your account manager can help you find the right office.
There's one more local rule to know. Inside city limits, the City's own Sanitation Division collects garbage, and the City's code says other haulers need a franchise, a contract, or the City Manager's approval to collect waste for pay. That rule counts construction debris as waste. Your account manager will confirm how it applies to your address before you book.