Targeting LEED Platinum certification, the Sitka mixed-use building is home to 365 apartments, 19 townhouses and 3,300 sq ft of retail space.

Located in Seattle’s South Lake Union neighborhood, with a design inspired by Washington’s San Juan Islands, Sitka features an interior courtyard with a running stream, a pond with fiber-optic lights, a fog element, natural driftwood, a tree house and rock walls handcrafted from shotcrete.

The project team created a cutting-edge wastewater heat-recovery system, among the first of its kind to be installed in a U.S. apartment building.

The system collects wastewater in a vault in the garage and pumps it into heat exchangers to heat potable water.

The team developed a unique confined-space plan to construct the vault and its internal components. The plan was used from preconstruction to completion.

The team also used salmon-safe deicer and protected sewer drains during construction to capture and filter rainwater runoff before it enters Lake Union.

Bio-retention planters capture rain from the roof and water planters before the water is sent to storm drains.

In addition, a gray-water harvesting system collects water from showers and lavatories to irrigate the green roof, home to an urban farm.

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