Make a Payment
Invoices are issued for DSO costs and fees as well as latecomer agreement reimbursements. Payments can be made online or by mail.
View the printable DSO charge menu (pdf).
For more information on charges, see Development Charges - Water (Director's Rule, FIN-220.2 (pdf)).
Make a Payment
Online payments
Make a secure payment through the Development Services Office web portal using your 8-digit invoice number: Online payment portal
Mail-in payments
Seattle Public Utilities - DSO
PO Box 94647
Seattle, WA 98124-4647
In-person payments
Seattle Municipal Tower
700 Fifth Avenue, 4th Floor - Main Lobby
Monday - Friday, 8:30 a.m. - 4:00 p.m.
Latecomer payments
Before you make a latecomer agreement payment, you'll need to contact DSO to receive a remittance slip.