| Bulding Address: | 635 Avenue of the Americas, New York NY 10011 |
| Building Alternate address: | 635 Ave of the Americas |
| Zip Code: | 10011 |
| Neighborhood: | Chelsea |
| Borough: | Manhattan |
| Stories: | 8 |
| Year Built: | 1901 |
| Building Class: | B |
History of 635 Avenue of the Americas, Manhattan, NYC
Located in the Ladies' Mile Historic District of Manhattan's Chelsea neighborhood, 635 Avenue of the Americas has a rich history dating back to the early 20th century. Originally, this site was home to the Simpson, Crawford & Simpson Department Store, a prominent retail establishment known for its architectural innovation and elegance. The store was constructed around 1902–1903, featuring custom-made large plate glass windows that were remarkable for their size at the time. The building also introduced the first escalators installed on Sixth Avenue. Mannequins displayed in the extensive windows were a novel concept that enhanced shoppers' experience by showing garments as they would appear worn.
Over the decades, the building evolved as part of the commercial development of Sixth Avenue, which was extended and widened starting in 1926 to accommodate new infrastructure and subway construction. The historic district designation recognizes the building's architectural and cultural value, tying it to the era when ladies' mile department stores flourished along Sixth Avenue.
In recent years, the 635 Avenue of the Americas building underwent substantial redevelopment and modernization. Completed in 2015, it was transformed into a Class A office building with a new lobby, elevators, and state-of-the-art building systems. This redevelopment preserved the building's historical significance while adapting it for contemporary commercial use, including the addition of a unique penthouse rooftop featuring a bocce court and event space.
Further emphasizing its commitment to sustainability and modern standards, the building achieved LEED Gold certification in 2020 following strategic upgrades that improved water efficiency and building operations, reflecting a 41% reduction in water use and an ENERGY STAR label.
635 Avenue of the Americas
Location: Manhattan, New York, NY 10011
Located in the heart of Chelsea between 19th and 20th Streets, 635 Avenue of the Americas is a Class A office building with a rich history as the former Simpson Crawford Department Store. The property was redeveloped and completed in 2015, featuring a new lobby, modern elevators, advanced building systems, and a unique penthouse rooftop with a bocce court and event space.
Building Information
- Year Built / Renovated: 1902 / 2015
- Building Size: Approximately 111,778 SF
- Building Height: 8 Stories
- Building Class: B
- Typical Floor Size: ~13,972 SF
LEED and Sustainability
The building is LEED EB: O+M v3 Gold certified, achieving significant water use reduction and energy efficiency through strategic upgrades and advanced building automation systems. This certification highlights the building’s commitment to sustainability and operational excellence.
Current Use and Notable Tenants
635 Avenue of the Americas currently houses the National Museum of Mathematics (MoMath), which will occupy approximately 34,363 SF starting in 2026. MoMath’s new location will include classrooms, exhibits, and event spaces designed to inspire and engage visitors in mathematics.
Amenities and Features
- Newly renovated lobby
- Shared roof deck with event space and bocce court
- State-of-the-art building systems
- Proximity to bus and subway lines
Building Amenities at 635 Avenue of the Americas, Manhattan, NYC
635 Avenue of the Americas is a Class A office building located in the heart of Chelsea between 19th and 20th Streets, originally completed in 2015 after redevelopment. The building features a newly renovated lobby with a warmer, inviting palette and a reception area inspired by opera chandeliers, blending heritage with modern design.
The building offers state-of-the-art systems and passenger elevators for efficient vertical transportation.
Tenants have access to two outdoor terraces on the 8th and 9th floors. These terraces have been transformed into lush garden spaces with ample seating to support outdoor meetings, midday breaks, and events. The 9th floor terrace was renovated from a former bocce court into a wildflower planter area with built-in benches and furniture for enhanced usability. The 8th floor terrace, directly accessible from a tenant suite, features east-facing gardens creating various seating enclaves, offering picturesque views of the Manhattan skyline.
Additional building highlights include a shared roof deck amenity and modernized building automation systems that contribute to sustainability, including water use reduction initiatives and LEED Gold certification achieved in 2020.
Office Tenants at 635 Avenue of the Americas, Manhattan, NYC
635 Avenue of the Americas, located in the heart of Chelsea between 19th and 20th Streets, is a Class A office building with a rich history and modern amenities.
The building has undergone significant redevelopment, including a new lobby, elevators, and state-of-the-art building systems, completed in 2015. It features a unique penthouse rooftop with a bocce court and event space.
Notable Tenants
- Infor – A leading provider of business application software, Infor signed a long-term expansion lease covering 49,246 square feet, representing 47% of the 635 building. Their total commitment at 635-641 Avenue of the Americas is 92,246 square feet, supporting their substantial growth in the Midtown South submarket.
- DSM – Another current tenant occupying office space within the building.
Building Features
- Entire 6th Floor: Approximately 12,322 sqft of office space, featuring 5 meeting rooms/offices and an open area, customizable by the landlord.
- Entire 7th Floor: Approximately 11,958 sqft of office space, similarly featuring 5 meeting rooms/offices and open area, with build-out options.
The building is prized for its location in Manhattan’s Midtown South, often referred to as “Silicon Alley,” known for its concentration of technology and new media companies.
Internet Providers at 635 Avenue of the Americas, Manhattan, NYC
The building located at 635 Avenue of the Americas in Manhattan is served by several high-speed internet providers offering fiber connections with varying speeds suitable for business and commercial needs.
Available Internet Providers and Technology
- Verizon New York: Fiber technology with speeds up to 1 Gb/s download and 25 Mb/s upload.
- Level 3 Communications: Fiber technology with speeds up to 10 Gb/s download and 10 Gb/s upload.
These providers are known for their fast and reliable fiber-optic internet services which are ideal for secure, high-demand business operations.
Location
635 Avenue of the Americas is located in the Chelsea neighborhood of Manhattan, NYC, between West 19th and West 20th Streets.
Cross Streets
The building is situated on Sixth Avenue (Avenue of the Americas) between West 19th Street and West 20th Street.
Transportation
Subway Stations Nearby
- 18 Street Station (1 train)
- 14 Street Station (F, L trains)
Bus Routes Serving the Area
- BM3
- BXM4
- M34-SBS
- M55
- QM10
Nearby Transit Stops
- 6 Av / W 35 St (1 min walk)
- 6 Av / W 36 St (2 min walk)
- W 34 St / 6 Av (2 min walk)
- 6 Av / W 34 St (2 min walk)
