AKA: Enso, South Lake Union, Seattle, WA

Structure Type: built works - commercial buildings - office buildings; built works - commercial buildings - stores; built works - dwellings - houses - apartment houses

Designers: Callison Architecture, Incorporated (firm); Glumac International, Mechanical Engineers (firm); Sellen Construction Company, Incorporated (firm); Anthony Callison (architect); Richard Glumac (engineer); John Henry Sellen Sr. (building contractor/civil engineer)

Dates: constructed 2009

13 stories

2201 Westlake Avenue
South Lake Union, Seattle, WA 98121-2712

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Building History

Vulcan Real Estate announced its intention of building on speculation a mixed-use development at 2201 Westlake Avenue in 11/2006. Building on spec--without tenants lined up before construction started--is always considered risky; Seattle's downtown real estate market was considered a good investment in 2006, due to high employment figures in the region. As originally envisioned, 2201 Westlake was to contain 300,000 square feet of offices, 135 condominiums, and 25,000 square feet of retail space. The condominums were to be located in a 19-story tower, with the office development in a separate 12-story building. It was located across the street of Vulcan's existing mixed-use development at 2200 Westlake Avenue, that opened in 2006.

The building as completed consisted of two parts as envisioned originally, but contained a 7-story office component and a 13-story condominum part, the latter being named "Enso."

Building Notes

According to Glumac, an energy engineering firm that worked on the buildng: "Enso was the first mixed-use, high-rise residential project in the city to earn LEED Gold certification. The two adjacent structures share a single high-performance central energy plant, which moves waste heat and cooling between the office space and adjacent condominium tower according to the time of day, optimizing the efficiency. Daylighting is featured throughout, with the entire façade of both structures covered in glass. All office levels at Enso include underfloor air delivery for efficient heating, cooling and ventilation. Additionally, water efficient fixtures and recycled or renewable materials were used throughout to demonstrate how to bring sustainable concepts to commercial spaces." (See Glumac.com. "Enso (2201 Westlake)," accessed 05/31/2018.)

PCAD id: 7256