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Most King County offices will be closed on Monday, May 30, 2016, for Memorial Day.  
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To pay online:

  1. Locate the account number at the upper center of your paper invoice. This identifies the property being charged.
  2. Locate the 6-digit site number at the lower center of your invoice. This identifies you and your billing address for the property being charged.
  3. Use the online payment system to pay with a Visa, Mastercard, or e-check.
The capacity charge cannot be paid by American Express or Discover cards.

To pay by mail:

  1. Return a check and the lower portion of your invoice using the blue return envelope included with your bill.
Sample invoice
Contact Us

Phone: 206-296-1450

Fax: 206-263-6073