September 17, 2026

Integrus puts PSQ headquarters on the block

Photo by Brian Miller [enlarge]

Union Trust Annex building is on the right. To the left, the nearly identical Union Trust Building.

Integrus has a long history as a successful Seattle architecture firm. It purchased the Union Trust Annex building in 2007, then extensively renovated its Pioneer Square headquarters at 117 S. Main St. The four-story building, now about 125 years old, has around 26,890 square feet — including the daylight basement and a mezzanine.

Now the building could be yours to purchase, unpriced. Broderick Group put it on the market last week, with its status listed as vacant (i.e. it can be delivered vacant). Or, conversely, it could be leased, floor by floor or as a whole.

(Update: Integrus says it is relocating within Pioneer Square, to the newly renovated Reedo Building at 542 First Ave. S. The new office, just a few blocks from the current location, reflects the firm’s long-term investment in Pioneer Square, and will keep the firm connected to clients, partners and organizations it serves, a firm spokesperson said.

Integrus remains a strong and growing Pacific Northwest design firm with offices in Seattle, Spokane, and Portland.)

The firm once known as Walker McGough was founded in Spokane circa 1953. It took its current name in the early 1990s, then merged four years ago with YGH, of Portland. Its website lists offices in those two cities, plus Pioneer Square. After the award-winning 2009 renovation, it was occupying 11,200 square feet there.

SMR Architects is based on the fourth floor; levels two and three look to be vacant.

The broker at Broderick is Damon McCartney. And the offering is not to be confused with the nearly identical Union Trust Building, at 119 S. Main, next door to the east, on the corner of Occidental. That sold last year to local investor Andrew Conru. To passersby, the two buildings can appear to be one. City records say the Annex architecture mimicked the Skillings & Corner design for the east building, but that the actual architect can't be verified.

Broderick's listing says the Annex began life as the home for Superior Candy & Cracker Co. It had a seismic retrofit as part of the big Integrus makeover. Before that, says Broderick, “In the 1960s, renowned Seattle architect Ralph Anderson restored the Union Trust Annex as part of one of Pioneer Square's earliest preservation efforts. His adaptive reuse of the property helped catalyze the revitalization of the district.”

Anderson also renovated the Union Trust Building during the same period. Both buildings lie within the Pioneer Square Preservation District. The Annex was once home to the Klondike Gold Rush National Historical Park, which is now a block south on Jackson.

At grade in the Annex, there's also a pop-up exhibition space called A Gallery. Past tenants have included Ankrom Moisan Architects.