Downtown Bellevue’s next skyline shakeup is officially on deck, as Onni Group lines up work on a three-tower mixed-use complex covering the superblock at 606 and 620 106th Avenue NE. Excavation is expected to begin in July 2026, kicking off a multi-year build that would bring more than 1,300 apartments, hundreds of hotel suites, roughly 896,000 square feet of office space, private amenity decks with two swimming pools, an on-site daycare and a 15,000-square-foot public plaza. The plan also threads a 30-foot slice of Bellevue’s Grand Connection through the block, setting up years of active construction in the middle of downtown if the timeline holds.
According to Downtown Bellevue Network, the “606 Bellevue Tower” proposal calls for three roughly 600-foot towers that would stack more than 1,300 apartments over hundreds of hotel rooms and about 896,000 square feet of office space, along with retail and amenity areas. The outlet reports that an Onni representative said excavation is scheduled for July 2026 and that construction could take close to five years.
What City Records Show
City planning files and the official SEPA record confirm the project received Master Development Plan and design review approval in June 2022 and that the site spans roughly four acres at 606 and 620 106th Avenue NE. The City of Bellevue’s SEPA Environmental Checklist spells out an earlier program that listed about 1,289 residences, 317 hotel suites and roughly 896,000 square feet of office space, plus a 15,000-square-foot public open space and a 30-foot-wide segment of the Grand Connection. The project record on the Washington State Department of Ecology SEPA register notes those approvals and estimates the completed development could support upward of 4,000 workers across offices, hotels and retail.
Timeline And Preconstruction
Urbanize Seattle and permit records show Onni purchased the parcel from Sterling Realty Organization in 2019 for roughly 116 million dollars and has been moving the project through multiple review stages ever since. The master development plan cleared the city in 2022, and Onni has been working through design, permitting and preconstruction while coordinating public-space improvements with city staff.
At a breakfast hosted by the Bellevue Downtown Association this week, Onni representative Brendan Lawrence told attendees the team is preparing to shift from permitting into excavation and construction this summer. If that schedule sticks, downtown Bellevue is in for several years of cranes, road work and steady progress as the towers rise.
What It Means For Downtown
Bellevue Chamber briefings and comments from local planners suggest the scale of the Onni plan will speed up downtown Bellevue’s ongoing densification, bringing more residents and daytime workers to support new retail and expanding transit. The pivot toward large mixed-use projects has been a recurring theme in recent Eastside panels, where developers and civic leaders have been debating how to match rapid growth with meaningful public space and transportation upgrades.
Observers will be watching to see whether key community benefits described in city filings, from the 15,000-square-foot plaza to the Grand Connection segment, arrive as promised once construction gets underway.
Both existing buildings on the block, a Barnes & Noble store and a Doxa Church location that relocated in 2022, are slated for demolition as part of the redevelopment, Downtown Bellevue Network reports. If Onni’s timeline holds, neighbors should start to see visible demolition and excavation activity later this summer as the site is readied for the first tower.
