Southport on Lake Washington – Parking Structure and Class “A” Office Space Project



Southport on Lake Washington – Parking Structure and Class “A” Office Space Project

Location: Renton, WA
Developer/Owner: Seco Development
Architect: ZGF Architects
General Contractor: Exxel Pacific
Structural Engineer: CPL
Total Project Size of Elevated Deck: 1,342,000 sq. ft.

The Conco Companies is providing concrete services for the parking structure and three office towers at Southport on Lake Washington, adjacent to the Hyatt Regency Lake Washington at Southport hotel. Situated on the south shore of Lake Washington, the waterfront property is a mixed-use development that will consist of the three, 9-story buildings totaling 728,769 square feet of Class “A” office space and the 347-room hotel. Occupancy is scheduled to begin in mid-2018.

The developer on the project, SECO Development, specializes in infill, and high-end mixed-use projects with an emphasis on residential, hotel, office, and retail. The project’s architect is ZGF Architects LLP, a design firm that focuses on architecture, interior design, and urban design. The general contractor is Exxel Pacific, a leading West Coast commercial construction company.

The parking structure for the hotel and office towers will provide approximately 2,120 structured parking spaces to give the complex a parking ratio of 2.7/1,000 usable square feet. Each of the buildings will have dedicated access to the parking structure from the podium lobbies.

As of February 2019, The Conco Companies has poured out the three, 9-story LEED Silver mixed-use buildings at the Southport on Lake Washington Office Campus located in Renton, Washington. The Southport on Lake Washington is a major project for Renton, covering 17.1 acres of waterfront property and will include 712,752 Sq. Ft. of Class “A” office space with a total project cost of $590 million.

This project has been a monumental achievement for the Conco Northwest Division. Under the direction of Conco’s Project Superintendent Gerrit Johnson, and Project Manager Alex Gateman, the structural duration of the project lasted over 2.5 years. Southport sets the high-water mark for the longest–and largest– contract the Conco Northwest Division has completed.

Over 2.5 years, Conco NW has:

  • Placed 77,400 Cu. Yds. of concrete (ready-mix supplied by Stoneway)
  • Shipped and placed 13,700,00 lbs. of rebar (installed by RPM)
  • Shipped and placed 1,450,000 lbs of post-tension cables (installed by RPM) – that’s more than 450 miles of cable.

Designed from the beginning to support the demanding needs of leading tech companies, the energy-efficient property supports high burst networking speeds and heavy data transfer requirements. Southport’s beautiful office space boasts large, efficient floor plans that range from 18,000 to 36,900 rentable Sq. Ft. with 12’ 4” ceiling and feature 9’ window heights.

More about this project:

Update on Southport on Lake Washington

Parking Structure and Office Space for Southport on Lake Washington Development



Location: Renton, Washington

Development Company:
SECO Development, INC.
General Contractor:
Exxel Pacific
ZGF Architects LLP

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