77 Union Street in Seattle, famously known as the Union Stables, is a landmark brick-and-timber structure originally constructed in 1910 to house over 300 drayage horses. After a century of shifting uses and eventual neglect, it underwent a world-class historical restoration in 2015, transforming into a LEED Gold-certified office and retail hub that anchors the city’s waterfront district in 2026.
The Genesis of 77 Union: The Equestrian Era (1910–1920)
To understand the historical significance of 77 Union, one must look at the topography and economy of Seattle at the turn of the 20th century. Before the widespread adoption of internal combustion engines, the city’s commerce literally ran on horsepower. The steep inclines of Seattle’s downtown necessitated powerful teams of drayage horses to move goods from the Elliott Bay docks to the growing commercial districts uphill.
In 1910, the Union Stables Company commissioned the construction of a state-of-the-art facility at the corner of Union Street and Western Avenue. Designed by the renowned architect George W. Lawton—who was also responsible for other Seattle landmarks like the Arctic Building—77 Union was built as a response to the city’s desperate need for organized, large-scale animal housing.
Architectural Specifications of the Original Build
The building was a marvel of its era. Standing four stories tall with a full basement, it utilized a "mill-construction" style, characterized by heavy timber framing and thick masonry exterior walls. This design was favored for its relative fire resistance compared to standard light-frame wood construction.
The most distinctive features of the 1910 build included:
- Internal Ramps: Wide, gradual wooden ramps were integrated into the interior to allow horses to be led from the ground floor to the upper levels.
- The Terra Cotta Ornament: A signature Lawton touch, a terra cotta horse head was placed above the main entrance, signaling the building’s primary function to the public.
- Ventilation Systems: Given the occupancy of 300 horses, the building required sophisticated (for the time) airflow systems to manage the heat and odors produced by the animals.
During this decade, 77 Union was the logistical heart of the waterfront. It was where the teams that built the city were fed, shod, and rested. However, the lifespan of the building as a stable was remarkably short, as the "Automotive Age" was arriving faster than many had anticipated.
The Transition: From Hooves to Horsepower (1920–1940)
By the early 1920s, the drayage horse was rapidly becoming obsolete. The Ford Model T and early heavy-duty trucks began to dominate the logistics industry. The owners of 77 Union were forced to adapt or face demolition.
The building’s transition during the 1920s represents a microcosm of the broader American industrial shift. The wide ramps that once accommodated horses were found to be surprisingly well-suited for early automobiles. The building was converted into a garage and auto repair shop, serving the growing number of Seattleites who were trading their carriages for cars.
Throughout the Great Depression, 77 Union survived by diversifying its tenant base. It served as a warehouse for various maritime and agricultural goods. Its proximity to Pike Place Market (established in 1907) made it an ideal secondary storage site for vendors. Despite the economic downturn, the building’s robust masonry shell remained intact, though the high-maintenance needs of its timber frame began to show the first signs of wear.
The Mid-Century Decline and Industrial Utility (1940–1990)
The middle of the 20th century was a period of "functional invisibility" for 77 Union. As Seattle modernized and the Alaskan Way Viaduct was constructed in the 1950s—cutting the building off from a direct view of the water—77 Union fell into the shadow of the massive concrete highway.
For several decades, the building was used for low-intensity industrial purposes:
- Storage and Logistics: Used by furniture companies and hardware wholesalers who needed large, open floor plates.
- Manufacturing: Small-scale workshops operated out of the basement and upper floors, taking advantage of the high ceilings and natural light provided by the large windows.
- The "Fix-It" Shop Era: In the 1970s and 80s, the building was known for housing a variety of repair businesses, though it lacked modern heating, cooling, or safety systems.
By the late 1980s, the building had become significantly dilapidated. Decades of salt air from the Puget Sound had eroded the mortar between the bricks, and the timber beams were suffering from moisture infiltration. It was frequently cited for building code violations, and many viewed it as a prime candidate for the wrecking ball.
The Turning Point: Preservation and the 2015 Transformation
The fate of 77 Union changed in 2014 when Allegra Properties acquired the site with the intent of performing a comprehensive historical restoration. This was not merely a cosmetic renovation; it was a massive engineering undertaking designed to bring a 100-year-old stable into the 21st century.
The Technical Challenges of Restoration
The project, led by the architecture firm Weinstein A+U, faced three primary hurdles: seismic stability, environmental sustainability, and historical fidelity.
Seismic Retrofitting: Seattle’s position in a high-risk earthquake zone meant that a masonry building like 77 Union was a "death trap" in its original state. Engineers installed a complex steel "exoskeleton" and internal bracing system. They used a technique known as "center-coring," where vertical holes are drilled through the masonry walls and reinforced with steel rods and epoxy. This allowed the building to meet 2015 seismic codes without altering the aesthetic of the exterior brickwork.
The Fifth Floor Addition: To make the project economically viable, a fifth-floor glass penthouse was added. This addition was controversial among some preservationists but was eventually praised for its "setback" design, which made it invisible from the street level directly in front of the building, thereby preserving the original skyline silhouette.
Sustainable Integration: The project achieved LEED Gold certification, a rare feat for a century-old stable. This was accomplished through:
- High-Efficiency HVAC: A Variable Refrigerant Flow (VRF) system was installed to provide zoned heating and cooling.
- Material Reuse: Over 90% of the original heavy timber beams were salvaged, cleaned, and re-installed.
- Stormwater Management: A green roof system on the new fifth floor helped manage runoff, a critical issue for buildings near Elliott Bay.
Historical Milestones of 77 Union
| Year | Event | Significance |
|---|---|---|
| 1910 | Construction Completed | Becomes Seattle’s premier drayage horse stable. |
| 1922 | Conversion to Garage | Marks the end of the equestrian era in downtown Seattle. |
| 1953 | Viaduct Construction | 77 Union is separated from the waterfront by the Alaskan Way Viaduct. |
| 2013 | Landmark Designation | The building is officially recognized as a City of Seattle Landmark. |
| 2015 | Grand Re-Opening | Completes transformation into LEED Gold office space. |
| 2019 | Viaduct Demolition | The removal of the highway restores the building's view and prominence. |
| 2026 | Current Status | Anchors the "Waterfront Seattle" park district as a premium tech/design hub. |
77 Union in 2026: A Landmark in the Modern Urban Fabric
As of 2026, 77 Union stands as a premier example of "adaptive reuse." The removal of the Alaskan Way Viaduct in 2019 and the subsequent completion of the Seattle Waterfront Park project have repositioned the building. It no longer sits in a dark industrial corridor; it now overlooks one of the most expensive and highly trafficked pedestrian promenades in the United States.
The ground floor currently houses high-end retail and a signature restaurant that utilizes the original brick archways as a design centerpiece. The upper floors are occupied by technology and architecture firms that value the "authentic" aesthetic of the exposed timber and brick.
The building serves as a case study for urban planners. It proves that historical preservation is not merely about "saving old things" but about integrating the soul of the city’s past into its future economic needs. The Union Stables is one of the few remaining physical links to the era when Seattle’s economy was measured in hay and hooves rather than gigabytes and cloud computing.
Preservation Standards and Compliance
The maintenance of 77 Union in 2026 follows strict guidelines set by the Seattle Landmarks Preservation Board. Owners are required to:
- Maintain Masonry Integrity: Periodic repointing of the brickwork must use a specific mortar mix that matches the lime-based composition of the original 1910 construction to prevent cracking.
- Visual Preservation: No signage or external alterations can be made that obscure the original terra cotta horse head or the rhythm of the window bays.
- Window Conservation: The large-pane windows, while updated for thermal efficiency, must maintain the original mullion patterns and profiles.
Frequently Asked Questions
Can the public tour the interior of 77 Union?
While 77 Union is primarily a private office building, the ground-floor retail spaces and the lobby are accessible to the public during business hours. The lobby often features historical photographs and plaques detailing the building’s transition from a stable to a modern office.
What happened to the original horse ramps?
During the 2015 renovation, the original ramps were too steep and took up too much square footage to be kept in their entirety for modern occupancy. However, the architectural team preserved the "spirit" of the ramps by creating a central staircase that mimics the original incline and uses salvaged wood from the original stable floors.
Is 77 Union listed on the National Register of Historic Places?
Yes, in addition to being a designated Seattle Landmark, the building is part of the Pike Place Public Market Historic District, which is listed on the National Register of Historic Places. This dual designation provides the building with the highest level of legal protection against demolition or unsympathetic alteration.
How did the building survive the 2001 Nisqually Earthquake?
77 Union suffered significant masonry cracking during the 2001 earthquake, which was one of the factors that led to its eventual vacancy and the need for the massive seismic retrofit in 2015. It was "red-tagged" for a period, meaning it was unsafe to enter until temporary shoring was installed.
Who was the architect George W. Lawton?
George W. Lawton (1864–1928) was a prolific Seattle architect known for his ability to blend industrial utility with ornate classical details. His work on 77 Union is considered one of his best examples of "utilitarian beauty," where a building designed for animals was still treated with the architectural respect of a civic institution.
Final Recommendations for Historians and Visitors
For those researching the industrial evolution of the Pacific Northwest, 77 Union provides an unparalleled look at the transition from animal-based logistics to the digital economy. If you are visiting the site in 2026, it is best approached from the Waterfront Park side (Western Avenue). This allows you to see the contrast between the historic red brick and the modern glass penthouse against the backdrop of the Puget Sound.
For property owners or developers looking to replicate this success, the key takeaway from the history of 77 Union is the value of uncompromising seismic investment. The building’s survival into the 22nd century was guaranteed not by its brick façade, but by the invisible steel skeleton added over a century after its first brick was laid.
