Construction has started on the Kirkland Urban, an 11.5-acre mixed-use development designed and master planned by Seattle-based architects CollinsWoerman for the Seattle-adjacent city of Kirkland, Washington.

The complex, a redevelopment of an existing shopping mall, is being redesigned around the notion of an “18-hour city,” a designation typically reserved for the mid-sized metropolitan centers that offer the density of amenities, jobs, and housing present in larger cities but do not necessarily run around-the-clock. The model relies on the mixed-use configurations to maintain a more balanced streetlife than prototypical purpose-built business districts, which typically shut down after business hours.

In a press release for the first phase of the project, partners PGIM Real Estate, Talon Private Capital, and Ryan Companies, US detail their plans for the first phase of Kirkland Urban: 390,000-square feet of Class-A office space, 140,000-square feet of retail, 185 apartments, and 1,700 parking spaces. The office spaces will take the form of a pair of six-story towers resting atop a multi-tiered retail podium. The developers are in the process of filling the towers with tech workers—tech companies Wave and Tableau have already signed on as anchor tenants—and plans also include a 50,000 grocery store to be operated by Kroger. The complex aims to include public art-lined “multi-family open spaces” and will feature a series of plazas oriented toward an adjacent recreational park, Peter Kirk Park.

The residential component of the project, housed in a brick-and-balcony-clad apartment block, will be designed by Seattle-based Weber Thompson and feature a roof deck, club room and fitness center. Seattle-based firm Hewitt will provide landscape design services for the project.

The developers and architects are aiming for LEED Gold certification for the project. The second phase of the Kirkland Urban has not yet been announced, but phase one is scheduled for completion in 2018.