Heavy Haul Network Permits

Permit Counter Temporary Closures

To protect the health and safety of our staff and customers, and to help mitigate the impact of COVID-19, we closed our public-facing customer service counters on Monday, March 16. Our counters remain closed until further notice. This includes both the Street Use and the Traffic and Parking permit counters at the Seattle Municipal Tower on floors 23 and 37. We are still processing permit applications. Please read the instructions below on how to apply for a permit.

For construction use in the right-of-way and street improvement permits, please e-mail your completed application to SDOTPermits@seattle.gov.

For major utility permits, please e-mail your completed application to SDOTUtilPermits@Seattle.gov and be sure to use the subject line: Permit#_ProjAddress – UMP New Application / Modification Application

For all other permits, please apply online through the Seattle Services Portal.

Our staff will be available to provide application coaching and assist with issuing permits by phone.

Street Use Permit Counter: 206-684-5253

  • Monday, Wednesday, Friday: 9:00 a.m. to 4:00 p.m.
  • Tuesday, Thursday: 10:30 a.m. to 4:00 p.m.

Traffic and Parking Permit Counter: 206-684-5086

  • Monday - Friday, 8:30 a.m. to 4:30 p.m.

For Check Payments

Make the check out to City of Seattle, SDOT

In a memo on the check include:  St Use, permit #, project address

Mailing Address:

SDOT, Street Use
PO Box 34996 Suite 2300
Seattle, WA 98124-4996

Working with the Port of Seattle, we’ve made it easier and more convenient to permit and inspect overweight vehicles operating in and out of Seattle’s Heavy Haul Network (HHN Map) or along any of these city streets (list). This partnership, also known as The Northwest Seaport Alliance, helps reduce congestion around the ports while making it easier to conduct business and remain competitive.

You are responsible to verify bridge heights along your planned route.

The Heavy Haul Network Permit is an annual permit that is valid for 12 months from the date of purchase.

How to get a Heavy Haul Network Permit

Apply online, or in person at the traffic permit counter:

Seattle Municipal Tower
700 5th Avenue, 37th Floor Seattle, WA 98104-5043
Monday – Friday, 8:30 AM – 4:30 PM, except holidays

How much does it cost?

$200.00