Contact Us

If you are interested in contracting with us on a project, please email us at marketing@triangleassociates.com.

Otherwise, please fill out the form below.

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    Our main office is situated in Seattle’s Eastlake Center. This 3-story building can be found near the waterfront on Eastlake Ave and E Hamlin St.

    Contact Our Office: 

    Seattle Office
    2825 Eastlake Ave E
    Suite 300
    Seattle, WA 98102
    Phone: (206) 583-0655
    Fax: (206) 382-0669

    Bellingham, Eastern Washington, and Portland, OR offices:
    Contact the main Seattle office

    If you are driving, there are multiple parking options surrounding the building:

    • On Street Parking: From 9am to 6pm, there is free street parking located on Eastlake Ave and Fairview Ave.
    • Off Street Parking: The Eastlake Center Parking Garage has parking for 1, 2, 3, 4, or 10 hours. The upper level has a payment stand that accepts credit cards, and signs for ParkMobile and Diamond Parking.
      • ParkMobile Zone: 604593
    • If you need to load or unload a vehicle, we suggest using the lower level parking.

    For local and regional public transit options, click here for Sound Transit’s Trip Planner.