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LPC approves replacement of deteriorated Knickerbocker Hotel terracotta with cast stone in select locations
Summary
The commission authorized replacement of specific failing terracotta units on the Knickerbocker Hotel's corners with cast stone after finding the replacement appropriate and noting prior alternate-material repairs on the building.
The Landmarks Preservation Commission approved May 6 a targeted program to replace deteriorated terracotta units at the Knickerbocker Hotel (1466 Broadway) with cast stone at selected corner locations after staff and applicants documented failing repairs and long-running Local Law 11 facade issues.
The applicants presented a condition assessment that identified roughly 206 corner units for replacement at the northwest, northeast and southeast corners, where prior patch repairs had repeatedly failed. "Each unit has had multiple repairs conducted. We do see these repairs separating and in failure," project architect noted during the presentation. The team proposed cast stone units fabricated with stainless-steel reinforcement, installed with anchors into the building backup to create a solid, durable corner condition that preserves the massing and appearance of the facade.
Commissioners and several public commenters — including the Victorian Society and the Historic Districts Council — asked about long-term weathering and visual match. "We remain concerned about how the cast stone will look as it ages," Kaylee Johnson of the Historic Districts Council said in public testimony. Applicants responded that the existing terracotta is a slip-glazed, matte finish that mimics limestone and that the selected cast-stone fabricator, VestaCast, is a certified member of the Cast Stone Institute and uses pigments and production methods intended to produce a close match and durable finish.
The commission found the replacement warranted by the units’ deteriorated condition, noted other locations on the building had previously used alternate materials (fiberglass, GFRC and cast stone), and approved replacement above the double-height base. The approval includes the condition that replacement units match historic profiles, textures and finishes and that installation use proper anchors and pointing to prevent future infiltration. Manhattan Community Board 5 recommended approval.
Docket: LPC-25-08773. The commission emphasized facade maintenance and flashings to avoid recurring deterioration and noted the installation approach was chosen in part to allow proper anchorage into the backup masonry.
