The developers at Alexandria Real Estate Equities spearheaded the headquarters for Juno Therapeutics at 400 Dexter in South Lake Union in Seattle. The captivating exterior features a combination of glass, aluminum composite and pre-patinated copper. Designed by architects CollinsWoerman, the building sits on the site of three demolished one-story facades to make way for the 12-story office structure.
As part of the project’s LEED Gold track, the building integrates salvaged site materials into the new design. The company plans to lease 90,000 of the building’s 375,000 square feet. 400 Dexter is in close proximity to the UW Medicine Research Campus, which makes the area a competitive location. Joel Marcus, Alexandria’s CEO explains, “In the urban environment, you now have the intersection of both science and technology essentially competing for the same locations.”
The metal components of the charming façade were fabricated by Keith Panel Systems (KPS) and installed by Krueger Sheet Metal. The impressive copper panels are custom from Zahner in ‘Dirty Penny,’ which will further develop in color over time due to natural weathering. The copper finish allows for a random variation in each panel, a look the architects were adamant about in their intended vision.
To contrast the natural metal, the architects specified Alucobond aluminum composite in the off-white finish Oyster. The panels were fabricated utilizing Keith Panel’s System A. System A is a compartmentalized and pressure-equalized rainscreen system. Additionally, Keith Panel fabricated an abundance of interior metal composite details as well. The panels offer warmth not often seen with metal-clad interior design.
Representatives at KPS describe, “Variations in the Zahner Metal Dirty Penny Copper Finish combined with Alucobond’s Oyster ACM creates an architectural expression unique to Seattle’s 400 Dexter project.”
The building in its entirety was designed for its tenants from its captivating exterior design to its sustainable amenities; the building is designed with the user in mind.
photography ©Keith Panel Systems