As of 2026, the property at 33501 1st Way S in Federal Way, Washington—famously known as the former Weyerhaeuser Corporate Headquarters—is in an advanced stage of redevelopment. Managed by Industrial Realty Group (IRG), the site is being transformed into a multi-building logistics and industrial complex known as "The Greenline," while the iconic mid-century modern headquarters building remains a preserved architectural landmark amidst ongoing community dialogue regarding land use and environmental conservation.
The Evolution of 33501 1st Way S: From Timber Giant to Logistics Hub
The property at 33501 1st Way S represents one of the most significant pieces of real estate in the South Puget Sound region. For decades, it served as the global headquarters for Weyerhaeuser, one of the world's largest private owners of timberlands. The site is renowned not just for its size—spanning over 400 acres—but for its unique architectural integration with the natural landscape.
Historical Significance and Architectural Heritage
The centerpiece of the property is the "skyscraper on its side," designed by Edward Charles Bassett of Skidmore, Owings & Merrill (SOM) and completed in 1971. This five-story, 350,000-square-foot building was revolutionary for its time, featuring "living walls" and a design that allowed it to blend into the surrounding forest and meadows.
When Weyerhaeuser announced its move to Seattle’s Pioneer Square in 2014, the future of this campus became a focal point for urban planners and preservationists. In 2016, Industrial Realty Group (IRG) purchased the campus for approximately $70.5 million. Since then, the property update has been defined by the tension between industrial modernization and the preservation of the site’s historical and environmental character.
Transition to "The Greenline" and "Woodside"
The redevelopment plan for the 33501 1st Way S address is divided into two primary projects:
- The Greenline: Focuses on the construction of several large-scale industrial warehouses on the north and west portions of the campus.
- Woodside: A secondary phase involving additional light industrial and distribution spaces tailored for logistics and e-commerce fulfillment.
By 2026, several of these structures have moved from the proposal phase to physical completion, significantly altering the skyline of the Federal Way corporate park district.
Current Property Status and Development Progress
The status of the property in 2026 is characterized by a mix of completed construction, active leasing, and ongoing environmental monitoring. The City of Federal Way and King County records indicate that the site has been partitioned into several distinct parcels to accommodate the varying uses of the land.
Completed Industrial Facilities
As of the current 2026 update, the following progress has been documented:
- Building A & B: These large-scale logistics centers are now operational. They feature high-bay doors, significant trailer parking, and modern stormwater management systems designed to mitigate runoff into the nearby Hylebos Creek watershed.
- Infrastructure Improvements: Significant road widening and signalization updates have been completed along 1st Way S and S 336th St to handle the increased heavy vehicle traffic associated with the new distribution centers.
- The Main Headquarters Building: The original Weyerhaeuser headquarters remains standing. While IRG has sought various tenants for this space—ranging from tech companies to educational institutions—it continues to serve as a multi-tenant office facility, though its occupancy rates fluctuate with the shifting demand for suburban office space.
Zoning and Land Use Compliance
The property is primarily zoned as Corporate Park (CP) and Light Industrial (M-1). The redevelopment has required strict adherence to the "Concomitant Agreement" originally established in the 1970s. This agreement governs how much of the land can be developed versus how much must remain as open space. Recent updates in 2025 and 2026 show that the developers have had to adjust building footprints to maintain the required ratios of "forested" vs. "impervious" surfaces.
Environmental Stewardship and Community Advocacy
One of the most complex aspects of the 33501 1st Way S property update is the ongoing involvement of community advocacy groups, most notably Save Weyerhaeuser Campus. These groups have been instrumental in ensuring that the redevelopment does not destroy the unique ecosystem of the site.
Preservation of the Rhododendron Species Botanical Garden
Adjacent to the main development area are the Rhododendron Species Botanical Garden and the Pacific Bonsai Museum. These entities are technically part of the larger campus footprint but operate independently. A major part of the 2026 status report includes the permanent easements and protective buffers that have been finalized to ensure that the industrial noise and light pollution from The Greenline do not negatively impact these world-class botanical collections.
Wildlife and Watershed Protection
The property sits at the headwaters of Hylebos Creek, a critical habitat for salmon. Environmental impact statements (EIS) conducted throughout the early 2020s led to the implementation of advanced bio-filtration swales. In 2026, the City of Federal Way continues to monitor these systems to ensure that the increased industrial activity at 33501 1st Way S does not lead to a degradation of water quality downstream.
Economic Impact on Federal Way
The transformation of 33501 1st Way S has significant economic implications for the City of Federal Way. While the loss of a single major corporate headquarters like Weyerhaeuser was a blow to the local tax base, the diversification of the site into multiple industrial uses has provided a different type of economic stability.
Job Creation and Tax Revenue
The shift toward logistics and distribution has created hundreds of blue-collar and mid-management jobs. The Greenline project alone is estimated to have generated substantial construction tax revenue and ongoing property tax contributions. However, some local economists note that the "job density" of a warehouse is generally lower than that of a high-density corporate office, leading to ongoing debates about whether this was the "highest and best use" for the land.
Logistics and Supply Chain Integration
Positioned between the Port of Seattle and the Port of Tacoma, 33501 1st Way S is a strategic asset for the regional supply chain. The 2026 update highlights how the site now serves as a "last-mile" delivery hub for major retailers, taking advantage of its proximity to Interstate 5 and State Route 167.
Technical Specifications and Site Data
To understand the scale of the redevelopment at 33501 1st Way S, it is helpful to look at the specific data points regarding the land and its structures.
| Feature | Specification/Status (2026) |
|---|---|
| Total Site Area | ~425 Acres |
| Primary Address | 33501 1st Way S, Federal Way, WA 98003 |
| Zoning Designation | Corporate Park / Light Industrial (M-1) |
| Main HQ Building Size | 350,000+ sq. ft. (Preserved) |
| Industrial Square Footage | ~1.5 million sq. ft. (New Construction) |
| Major Tenants | Logistics Providers, E-commerce, Tech Office |
| Environmental Buffers | ~50% of site remains open/forested space |
| Jurisdiction | City of Federal Way |
Challenges and Troubleshooting the Redevelopment Process
The path to the current 2026 status has not been without hurdles. Property owners, developers, and the city have faced several challenges that offer lessons for large-scale suburban redevelopment.
Litigation and Permitting Delays
The project faced multiple years of delays due to appeals filed under the State Environmental Policy Act (SEPA). Petitioners argued that the original environmental impact statements did not adequately account for the cumulative effects of traffic and tree removal. These legal challenges were largely resolved by 2024, but they forced the developers to adopt more "green" building standards, including LEED certification for the new warehouses.
Traffic Mitigation
The primary "troubleshooting" effort for the 33501 1st Way S property has been managing the flow of heavy trucks. The intersection of 1st Way S and S 336th St has undergone several redesigns. Residents in the nearby West Campus neighborhood have occasionally reported issues with unauthorized truck parking and noise. In response, the city implemented a Heavy Vehicle Management Plan in late 2025 that restricts certain movements during peak commuting hours.
Adapting the "Skyscraper on its Side"
Repurposing a 1970s corporate headquarters for 21st-century needs is a significant technical challenge. The building’s open-floor plan and integrated landscape make it difficult to "subdivide" for smaller tenants. The 2026 update reveals that IRG has invested in modernizing the HVAC and fiber-optic infrastructure of the main building to make it more attractive to "hybrid" workforces that value outdoor-accessible office spaces.
Future Outlook for 33501 1st Way S
Looking beyond 2026, the property is expected to reach "full build-out" by 2028. The remaining phases of the Woodside project will likely focus on smaller, flexible "flex-space" buildings that can accommodate light manufacturing, specialty laboratories, or artisanal production.
The long-term success of the 33501 1st Way S property update will be measured by how well the site balances its industrial utility with its heritage. If the "Greenline" can operate without degrading the adjacent botanical gardens and if the main headquarters building can find a sustainable long-term tenant, it will serve as a global model for "re-wilding" and repurposing massive corporate estates.
Frequently Asked Questions
Is the original Weyerhaeuser headquarters building open to the public?
The main building at 33501 1st Way S is a private office facility and is not generally open for public tours. However, the surrounding trails and the adjacent Rhododendron Species Botanical Garden and Pacific Bonsai Museum are open to the public and offer excellent views of the building's exterior and its integration with the landscape.
What is the "Greenline" project exactly?
The Greenline is the branding used by Industrial Realty Group (IRG) for the industrial portion of the redevelopment. It consists of high-specification warehouse and distribution buildings designed to meet modern logistics needs while adhering to the specific environmental constraints of the Federal Way site.
How has the redevelopment affected local traffic?
The property update has led to increased truck traffic on 1st Way S. To address this, the City of Federal Way required the developers to fund several million dollars in road improvements, including new turn lanes and upgraded traffic signals. Ongoing monitoring is in place to ensure that level-of-service (LOS) standards are maintained for local residents.
Who is the current owner of the 33501 1st Way S property?
As of 2026, the property remains under the ownership and management of Industrial Realty Group (IRG), a national real estate development firm specializing in the adaptive reuse of large corporate and industrial properties. They work closely with the City of Federal Way on all permitting and land-use updates.
Are there still trees being cut down at the site?
The majority of the clearing for the Greenline and Woodside projects was completed between 2021 and 2024. In 2026, the focus has shifted to replanting and landscape restoration. Under the city's tree retention ordinances, the developers are required to maintain a specific percentage of the "urban forest" canopy on the site.
Practical Next Actions for Interested Parties
For those looking to engage with or learn more about the 33501 1st Way S property:
- For Job Seekers: Monitor the career pages of logistics firms and e-commerce companies operating out of The Greenline. The influx of tenants has created a steady demand for warehouse operations, logistics coordination, and facility management roles.
- For Residents: Stay updated on traffic advisories and city council meetings via the City of Federal Way official website. Public hearings regarding the final phases of the Woodside development are typically posted in the Land Use notices section.
- For Preservationists: Support the Save Weyerhaeuser Campus organization and the Pacific Bonsai Museum. These organizations continue to play a vital role in monitoring the environmental health of the campus and ensuring the heritage of the site is respected.
- For Prospective Tenants: Contact Industrial Realty Group (IRG) for leasing information regarding the remaining office space in the main headquarters building or future flex-space availability.
The property at 33501 1st Way S remains a cornerstone of the Federal Way community. Its transition from a single-user timber headquarters to a multi-use industrial and corporate park reflects broader trends in real estate and economic development, emphasizing the need for balance between progress and preservation.
