The 1891 Terminal Warehouse at 261 11th Avenue has officially traded freight for flex space, and the neighbors are getting quite the show. The full-block brick behemoth, now a roughly 1.3 million-square-foot office and retail complex, has wrapped its years-long transformation and is already racking up hardware. Developers say the redevelopment was completed in 2025 and now threads a long rail tunnel and reclaimed centuries-old timbers through 12 modern office floors wrapped around a newly carved central courtyard. For both office hunters and locals, it is a rare case of institutional-scale preservation that also leans hard into workplace perks.
Judges praise preservation and engineering
As reported by CoStar News, the project just picked up a 2026 CoStar Impact Award, with judges applauding the team for balancing historic stewardship with sustainability and calling the scheme one that “redefines adaptive reuse at institutional scale.” The award citation singled out the restored tunnel and the reclaimed-timber program as signature moves and credited the development team for navigating complex structural work without sacrificing the building’s landmarked character.
Big-name amenities are already signing on
Tenants are already lining up. The Real Deal reported that Equinox has signed on for roughly 50,000 square feet, while Convene Hospitality Group is planning a roughly 50,000-square-foot events space called The Mallory. Both operations will plug directly into the building’s restored tunnel and are billed as anchor amenities for the wider office and retail mix. Landlord teams say these early leases are designed to spark activity in the tunnel corridor and along the street-level retail as quickly as possible.
How they did it: bracing, piles and timber
The makeover was not exactly a light touch. Developers installed more than 350 tons of temporary steel bracing to hold the landmark brick shell in place while crews carved out the interior and added a six-story glass-and-metal overbuild, according to CoStar News. Portions of the original perimeter foundations were reused and new piles were driven to bedrock, while terraces and river-facing outlooks help create more than 110,000 square feet of outdoor space, as detailed by Commercial Observer. The team also salvaged interior timbers, including pieces reported to be centuries old, repurposing more than half of that wood and saying the effort cut the embodied-carbon footprint roughly in half compared with comparable new construction.
Landmarks signoff and the reuse mandate
None of this happened without a long stare from the city’s preservation watchdogs. The project moved ahead only after an extended review by the New York City Landmarks Preservation Commission, which held hearings in late 2019 and issued a Certificate of Appropriateness that allowed rooftop additions while requiring significant salvage and reuse of interior materials, according to New York City Landmarks Preservation Commission documents. The permit specifically called for retaining the central rail tunnel, restoring masonry openings and using salvaged timbers in both interior and exterior applications. That regulatory blueprint shaped the team’s approach to preserving industrial character while still hitting modern workplace standards.
Why the project matters for Chelsea
The timing is not accidental. Manhattan’s office market has been showing renewed leasing momentum, and large, amenity-heavy conversions like Terminal Warehouse give employers fresh reasons to look west toward the river. The Real Deal notes that the project’s tenant lineup is arriving as borough-wide leasing volume climbs back above pre-pandemic benchmarks, and award judges say the building helps anchor a new chapter for West Chelsea. For locals, the restored tunnel and newly public-facing spaces could quietly rewrite how people move through this slice of the waterfront and how the neighborhood serves both daytime office crowds and evening visitors.
