245 Park Avenue

245 Park Avenue is a major facade renovation project transforming a 1960s office tower in Midtown Manhattan. KPF led the design for SL Green, the building's owner, on a $100 million capital investment focused entirely on envelope modernization—a strategy increasingly common for aging office stock competing for premium tenancy and ESG credentials.

The overcladding system combines terracotta and bronze metal panels, creating a sophisticated material palette that updates the building's dated exterior while respecting Midtown's design context. Terracotta provides warmth and visual softness, while bronze metal accents add contemporary geometric expression and metallic contrast. The dual-material approach required detailed mock-ups and sample approval cycles to ensure color harmony and weathering patterns aligned across both systems.

The project's primary challenge lies in the overcladding installation methodology. Adding a new facade layer to an occupied office tower demands careful sequencing—typically working floor-by-floor or section-by-section to minimize tenant disruption and maintain building operations throughout the multi-year renovation. The new envelope system must tie into existing structural frame connections, accommodate building settlement and movement accumulated over six decades, and integrate with existing MEP systems without requiring wholesale building-wide replumbing or rewiring. The terracotta and metal panels attach to a backing structure that spans between the existing floor slabs, requiring precision measurement and installation tolerances to manage cumulative building deflection and thermal movement across the tower's full height.