On First Hill overlooking Downtown Seattle, Lewis constructed a 19 story, 150 unit luxury retirement tower, Horizon House. This expanded an existing complex, including 50 assisted living units. In the 100 independent living units, residents were able to upgrade their interiors from building standard finishes. The tower includes four levels of parking with 90 spaces partially below-grade. An additional 20,000 square feet of the existing complex was renovated.