Expert Tenant Broker "No Fee"
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Rent/Lease Apartment 35 East 21st Street

Tenant Broker’s Perspective: Return-to-office mandates are driving up rental prices at 323 East 17th Street. This trend is projected to continue. Opportunities for subleases remain available at 323 East 17th Street and in the nearby Gramercy Park neighborhood.

Why Optimal Spaces –
Tenant Broker

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  • No fee for clients renting space.
  • We work for YOU, not the landlord.
  • Save 15–20% on your business costs.
  • Save 100–200 hours of research.
  • Access to all available spaces.
  • Specialized real estate expertise.

Alone or with other broker

✕
  • Miss deals and hard-to-find spaces.
  • Potential conflict of interest (often represent landlords).
  • Only 10% of available spaces are online.
  • Lack of specialized expertise.
  • May not get the best terms or uncover hidden costs.
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Tenant Representation: Optimal Spaces acts exclusively as a "Tenant Broker," only representing tenants, never landlords.
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Unbiased Service: Avoiding conflicts of interest, they provide impartial service, showing a wider range of properties and negotiating the best price.
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Comprehensive Process: Agents guide clients end-to-end, offering market surveys, floor plans, pricing expectations, and industry contacts.
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Cost Savings: They negotiate rental price and identify/abate "hidden costs."
1. The Crucial Distinction: Whose Side Are They On?
2. It Almost Always Costs You Nothing
3. Access to “Hidden” Inventory
4. Negotiating Beyond Base Rent
5. Time Savings & Process Management
6. Mitigating Risk (the “Gotchas”)

323 East 17th Street Property Overview

Building Address: 35 East 21st Street, New York NY 10010
Building Alternate Address: 323 E 17th St
Zip Code:10010
Neighborhood:Gramercy Park
Borough:Manhattan
Stories:10
Year Built:1905
Building Class:B

35 East 21st Street, located in Manhattan's Flatiron District, is a historic building with a rich architectural history. Constructed in 1903, this 10-story structure is renowned for its Art Nouveau style, a popular architectural trend during the early 20th century.

Over the years, the building has undergone several renovations, with the most recent alterations occurring in 2012. It features exposed brick walls, wooden flooring, and industrial elements like metal accents and exposed ductwork, blending its original character with modern design elements.

The building's interior spaces are designed to be bright and open, with oversized windows and minimalist furnishings that highlight its historic charm. Situated between Madison Square Park and Union Square Park, 35 East 21st Street offers easy access to some of Manhattan's most iconic attractions and public transportation options.

Historically, the building was leased entirely by WeWork as part of its HQ by WeWork program, targeting medium-sized businesses. Previous tenants have included Tumblr, which was acquired by Yahoo in 2013. The building's strategic location near Gramercy Park and Madison Square Garden has made it a coveted spot in Manhattan's commercial landscape.

35 East 21st Street, Manhattan, NYC is located in the Flatiron District, between Park Avenue South and Broadway. It is also situated near Gramercy Park, offering a strategic location close to iconic landmarks like Madison Square Park and Union Square. Built in 1903 or 1905, this historic building is a 10-story structure with a mix of original and modern design elements.


Building amenities at 35 East 21st Street, Manhattan, NYC include:

  • Enclosed Courtyard
  • Attended Lobby
  • Tenant-Controlled HVAC
  • 24 Hour Access
  • Electronic Keycard Access
  • 24/7 Security
  • Meeting Rooms
  • Mother’s Room
  • Phone Booths
  • Event Space
  • Stage/Auditorium
  • Dog-Friendly Spaces

35 East 21st Street in Manhattan's Flatiron District is noted for its historic and strategic location. The building has been home to several notable tenants:

  • WeWork signed a lease for the entire building, utilizing it for their HQ by WeWork program, which targets medium-sized businesses with 11 to 250 employees. This initiative is part of WeWork's expansion beyond traditional coworking models.
  • Tumblr previously occupied the space before being acquired by Yahoo (now Oath Inc.) in 2013. Following the acquisition, Tumblr consolidated its operations within Yahoo's existing New York offices.

The building offers approximately 100,000 square feet of office space and is situated near iconic locations such as Madison Square Park and Gramercy Park.


In the building at 35 East 21st Street, Manhattan, NYC, residents have access to several internet service providers. The most common providers in Manhattan include Spectrum, Verizon (Fios), and Astound Broadband (formerly RCN). Spectrum offers both cable and fiber services with speeds up to 1 Gbps. Verizon Fios provides fiber internet with speeds reaching up to 2.3 Gbps, though availability may vary in some areas. Astound Broadband also offers high-speed internet plans with unlimited data. Other providers like T-Mobile Home Internet and Earthlink may offer services as well, depending on specific location and availability.


35 East 21st Street is located in the Flatiron District of Manhattan, NYC. The building benefits from nearby access to several public transportation options. For subway users, the closest stations are on 23rd Street, offering the R, W, and 6 trains. Union Square is also within walking distance, providing additional subway lines including the L, N, and others.

Cross streets include Broadway and East 21st Street. Nearby bus stops are located at E 23rd Street and Broadway, providing bus routes such as the M1, M2, and BM lines.

The area is well-served by public transit, making it an ideal location for those reliant on buses and trains. For directions or further information, platforms like Moovit or MapQuest can offer detailed routes and schedules.

Office Tenants Rented / Leased 323 East 17th Street
  • WeWork leased 100,000 SF
  • Tumblr leased 21,000 SF
  • 1 Life Healthcare Inc. leased 5,685 SF
  • TUMBLR Inc. leased 5,000 SF
  • Splice leased 10,179 SF
  • One Medical leased 11,370 SF
Retail Tenants Rented / Leased 323 East 17th Street
  • Mexican Hospitality Operator LLC leased 3,700 SF
Nearby Office Tenants Leased
  • Elizabeth Arden leased 35,698 SF at 200 Park Avenue South
  • Left/Right leased 34,000 SF at 39 West 19th Street
  • The Atlantic leased 33,609 SF at 60 Madison Ave
  • Enigma Technologies, Inc. leased 33,406 SF at 245 Fifth Ave
  • Work Better leased 33,103 SF at 33 West 19th St
  • The Yard leased 33,000 SF at 246 Fifth Avenue
  • Looker Data Sciences, Inc. leased 33,000 SF at 40 West 25th St
  • LinkShare Corporation leased 33,000 SF at 215 Park Ave S
  • Petco leased 29,989 SF at 860 Broadway
  • Progressive Plan Administrators Inc. leased 29,291 SF at 470 Park Ave S
Nearby Retail Tenants Leased
  • Ricky's leased 6,000 SF at 1133 Broadway
  • Free People leased 6,000 SF at 79 Fifth Ave
  • Duane Reade leased 6,000 SF at 184 Fifth Ave
  • Theory leased 5,500 SF at 139 Fifth Ave
  • Silk Trading leased 5,400 SF at 936 Broadway
  • Philippe Massoud restaurant leased 5,000 SF at 236 Fifth Ave
  • Kellogg's NYC leased 5,000 SF at 31 East 17th Street
  • Straussie's leased 4,954 SF at 41 Madison Avenue
  • New York Community Bank leased 4,811 SF at 404 Park Ave South
  • Schnipper's Quality Kitchen leased 4,790 SF at One Madison Ave

Argent Trading Testimonial

Argent Trading testimonial To Whom it May Concern: I have had the opportunity to work with Optimal Spaces Inc. (specifically, Stephen Sunderland) over the last 18 months. Stephen was hired to find a reasonably priced lease for corporate office space that would support our highly professional environment. I considered this to be a significant challenge since Manhattan was experiencing a severe shortage in available professional space. However, Stephen found a space that exceeded my expectations and that was approximately 15% below current market rates for comparable space. An important aspect of working with Stephen is the level to which I can trust him to act in my best interest. I believe that Stephen possesses in-depth knowledge of the New York City real estate market and is responsive and performs his work in a very professional manner. I am impressed by Stephen's sincere desire to understand his clients' needs. It is clear to me that Stephen is interested un building mutually beneficial business relationships. I am happy to recommend Optimal Spaces Inc. to other growing businesses, and I look forward to working with Optimal Spaces Inc. again. Sincerely, William Levitz President Argent Trading, LLC