Seattle Public Utilities
Mami Hara, General Manager/CEO
DSO Payment
Make a secure payment to the Development Services Office using your 8-digit invoice number:
Other payment methods
Mail-in payments
Seattle Public Utilities - DSO
PO Box 94647
Seattle, WA 98124-4647
In-person payments
Information & Payments desk
Seattle Municipal Tower
700 Fifth Ave, 4th floor (lobby entrance)
Seattle, WA 98124
Latecomer payments
Before you make a latecomer agreement payment, you’ll need to contact DSO to receive a remittance slip.
Payments may only be made in-person at the following locations:
City of Seattle Customer Service Center
700 5th Avenue, 4th Floor (lobby entrance)
Monday - Friday, 8 a.m. - 5 p.m.
City of Seattle Treasurer's Office
700 5th Avenue, 42nd Floor
Monday - Friday, 8 a.m. - 5 p.m.