989 Sixth Avenue – Residential Landmark in Midtown Manhattan, NY
SOCOTEC provided Building Envelope, Special Inspections, and Energy Consulting for 989 Sixth Avenue, a striking new residential tower located in the heart of Midtown Manhattan’s Garment District, scheduled for completion in 2026.
Key Information
Project Name: 989 Sixth Avenue - Casoni
Developer: Sioni Group
Location: 989 Sixth Avenue, New York, NY
Architect: C3D Architecture, PLLC
Services Provided: Building Envelope & Energy Consulting, Special Inspections (NYC DOB)
Size: 384,000 SF / 81 Floors
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The Challenge
Developing a Super-Tall Residential Tower in One of New York City’s Busiest Districts
Building an 81-story residential tower in Midtown Manhattan’s Garment District posed significant design and engineering challenges. The project’s bold architectural vision included a curved glass façade paired with metal panel cladding, requiring advanced detailing and precision fabrication to achieve both aesthetic appeal and structural integrity. In a dense urban environment like New York City, these complexities were amplified by logistical constraints and the need for seamless coordination across multiple trades.
Beyond the architectural demands, the tower had to meet New York City’s rigorous energy code requirements, which called for high-performance envelope systems and detailed thermal modeling to ensure compliance. Expansive terraces and podium spaces introduced additional waterproofing challenges, as these areas are highly exposed to weather conditions and require robust protection to prevent long-term damage. Balancing durability, energy efficiency, and design ambition while adhering to local regulations made this project a true test of technical expertise and innovative solutions.
Building an 81-story residential tower in Midtown Manhattan’s Garment District posed significant design and engineering challenges. The project’s bold architectural vision included a curved glass façade paired with metal panel cladding, requiring advanced detailing and precision fabrication to achieve both aesthetic appeal and structural integrity. In a dense urban environment like New York City, these complexities were amplified by logistical constraints and the need for seamless coordination across multiple trades.
Beyond the architectural demands, the tower had to meet New York City’s rigorous energy code requirements, which called for high-performance envelope systems and detailed thermal modeling to ensure compliance. Expansive terraces and podium spaces introduced additional waterproofing challenges, as these areas are highly exposed to weather conditions and require robust protection to prevent long-term damage. Balancing durability, energy efficiency, and design ambition while adhering to local regulations made this project a true test of technical expertise and innovative solutions.
The Solution
Building Envelope and Energy Consulting in NYC
To overcome the technical and regulatory challenges of constructing this Midtown Manhattan residential high-rise, SOCOTEC implemented a comprehensive strategy that combined design-phase consulting with rigorous construction oversight. Our approach ensured the building envelope, waterproofing systems, and energy performance met the highest standards while supporting the project’s architectural vision.
Project Scope Expertise
- Building Envelope Consulting & Monitoring: Detailed design support for curtain walls, window systems, and high-performance façades.
- Roofing & Waterproofing Consulting: Solutions for occupied terraces, podium waterproofing, and below-grade protection.
- Energy Code Compliance: COMcheck submissions, backstop analyses, and thermal modeling to meet NYC energy standards.
- Construction Phase QA & Special Inspections: Mock-up reviews, shop drawing evaluations, TR-1 & TR-8 special and progress inspections, fabrication monitoring, and site quality assurance.
The Results
High-Performance Building Envelope and Energy Compliance
The 989 Sixth Avenue project successfully delivered a visually iconic and technically advanced residential tower in Midtown Manhattan’s Garment District. Through SOCOTEC’s integrated approach, the building achieved compliance with New York City’s stringent energy codes, while maintaining its ambitious architectural vision. Our comprehensive envelope and waterproofing strategies ensured long-term durability and resilience against the city’s demanding climate. Rigorous quality assurance throughout construction minimized risk, optimized performance, and supported an on-time delivery for this landmark high-rise.
Key Benefits
- Architectural Impact: A striking curved glass and metal-panel façade that defines Midtown’s skyline.
- Energy Efficiency: Full compliance with NYC energy codes through advanced thermal modeling and envelope optimization.
- Durability & Resilience: Robust waterproofing and roofing systems for terraces, podiums, and below-grade spaces.
- Quality Assurance: Extensive inspections and monitoring to ensure performance, safety, and code compliance.
- Streamlined Delivery: Coordinated services from design through construction for a smooth project timeline.
The 989 Sixth Avenue project successfully delivered a visually iconic and technically advanced residential tower in Midtown Manhattan’s Garment District. Through SOCOTEC’s integrated approach, the building achieved compliance with New York City’s stringent energy codes, while maintaining its ambitious architectural vision. Our comprehensive envelope and waterproofing strategies ensured long-term durability and resilience against the city’s demanding climate. Rigorous quality assurance throughout construction minimized risk, optimized performance, and supported an on-time delivery for this landmark high-rise.
Key Benefits
- Architectural Impact: A striking curved glass and metal-panel façade that defines Midtown’s skyline.
- Energy Efficiency: Full compliance with NYC energy codes through advanced thermal modeling and envelope optimization.
- Durability & Resilience: Robust waterproofing and roofing systems for terraces, podiums, and below-grade spaces.
- Quality Assurance: Extensive inspections and monitoring to ensure performance, safety, and code compliance.
- Streamlined Delivery: Coordinated services from design through construction for a smooth project timeline.
