AnalysisMarch 21, 2026

The 10 Biggest Projects Under Construction in Seattle Right Now

The largest construction projects underway in Seattle in 2026, ranked by estimated construction value from permit records.

Every project in this article is on the live map.

Seattle has hundreds of active construction projects. Most are mid-rise apartments and mixed-use buildings in the $10M to $40M range. A handful of projects dwarf the rest. These are the 10 largest by estimated construction value from permit records, all currently under construction.

The List

RankAddressNeighborhoodValueUnitsStoriesType
11600 9th AveDowntown$700M40429Mixed-use
22350 6th AveDowntown$371M89129Mixed-use
31401 3rd AveDowntown$300M037Commercial
42025 5th AveDowntown$250M46144Mixed-use
5801 3rd AvePioneer Square$245M136Commercial
62405 7th AveDowntown$215M44244Mixed-use
71101 Thomas StSouth Lake Union$213M1,57541Mixed-use
812301 Stone Ave NNorthgate$210M5404Mixed-use
92005 5th AveDowntown$203M55044Mixed-use
105900 37th Ave SColumbia City$188M7507Mixed-use

Combined, these 10 projects represent over $2.9 billion in construction value and more than 5,600 residential units.

What the Top 10 Tell You

Downtown dominates. Seven of the ten are in Downtown or Pioneer Square. Downtown is the only area where the zoning code allows the building heights and densities that justify $200M+ construction budgets.

Two outliers break the pattern. The Northgate project (12301 Stone Ave N, $210M, 540 units) is a large-scale, transit-oriented development at only 4 stories, spread across a massive site near the light rail station. The Columbia City project (5900 37th Ave S, $188M, 750 units) is a 7-story mixed-use development, one of the largest in South Seattle.

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The single largest project is $700M. At 1600 9th Ave Downtown, this 29-story mixed-use development with 404 units is more than double the value of any other project in the pipeline.

1,575 units at one address. The South Lake Union project at 1101 Thomas St has the highest unit count of any single project in the city, spread across a 41-story mixed-use tower.

Commercial is still building.

Two of the top 10 are pure commercial projects (1401 3rd Ave and 801 3rd Ave), which shows that while office construction has slowed overall, the largest commercial projects are still moving forward in the Downtown core.

Browse the Full Pipeline

You can sort all Seattle projects by construction value on BuildVue's map. Filter by "Under Construction" status to see active projects, or remove the filter to see the full pipeline.

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