Expert Tenant Broker "No Fee"
We represent you, not the landlord

Rent/Lease Apartment 303-309 E 51st St

Lease Office 303-309 E 51st St

Rent Sublease Office at 303-309 E 51st St

Nearby Sublease office Spaces for Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Type of Space	Class A/month	Class B/month	Class C/month
Windowed office/person
Interior office/person
Team Rooms
Suites

Nearby office Spaces for Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent
E 55th St & Lexington Avenue	$ 46	2,900	$ 10,995

Address	$ / SF	SF	Monthly Rent
E 59th St & Second Avenue	$ 42	2,400	$ 8,400
Third Ave & East 57th Street	$ 50	1,800	$ 7,500
E 55th St & Lexington Avenue	$ 48	1,900	$ 7,600

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Address	$ / SF	SF	Monthly Rent

Retail Spaces for Rent at 303-309 E 51st St

Retail Spaces
Sublease

Rent Retail 303-309 E 51st St

$ / SF	SF	Monthly Rent
Negotiable

$ / SF	SF	Monthly Rent
Negotiable

$ / SF	SF	Monthly Rent
Negotiable

Nearby Tenants

Nearby Office Tenants Leased

Ziff Brothers Investment leased 125,000 SF at 350 Park Avenue
Mitsubishi International Corp. leased 122,500 SF at 655 Third Ave
BDO Seidman leased 121,441 SF at 100 Park Ave
The United Nations leased 120,000 SF at 730 Third Ave
Convene leased 116,000 SF at 530 Fifth Avenue
McLaughlin & Stern leased 112,000 SF at 260 Madison Avenue
WeWork leased 111,500 SF at 750 Lexington Avenue
Katten leased 110,157 SF at 575 Madison Ave
TBWA Worldwide leased 107,308 SF at 488 Madison Ave
KPMG LLP leased 102,979 SF at 560 Lexington Ave

Nearby Retail Tenants Leased

Asanda Aveda leased 6,800 SF at 120 East 56th St
New York Golf Center leased 6,500 SF at 100 Park Ave
Francois Latapie leased 6,500 SF at 30 East 60th St
Armonk Farm Inc. leased 6,400 SF at 2 West 45th St
Nespresso leased 6,300 SF at 24 West 40th Street
Le Pain Quotidien leased 6,050 SF at 3 Park Ave
Brooks Brothers leased 6,000 SF at 11 East 44th St
National Basketball Association leased 6,000 SF at 590 Fifth Ave
JP Morgan Chase Bank leased 6,000 SF at 1 United Nations Plaza
Bo Concept leased 6,000 SF at 220 East 57th St

$ / SF	SF	Monthly Rent
Please notify me when a new space is available

Tenant Broker’s Perspective: Return-to-office mandates are driving up rental prices at 303-309 East 51st Street. This trend is projected to continue. Opportunities for subleases remain available at 303-309 East 51st Street and in the nearby Midtown East neighborhood.

Find My Space!

Thank you! we will be in touch.

Property Summary

303-309 East 51st Street Property Overview

Building Address:	303-309 E 51st St, New York NY 10022
Building Name:	Halcyon
Building Alternate Address:	303-309 E 51st St
Zip Code:	10022
Neighborhood:	Midtown East
Borough:	Manhattan
Stories:	32
Year Built:	2015
Building Class:	A

303 East 51st Street, located in the Turtle Bay neighborhood of Manhattan, New York City, is a residential skyscraper. The building stands at 360 feet (110 meters) with 32 floors.

Construction began in 2007, with an initial design for a 40-story building at 470 feet (143.3 meters) tall. In December 2007, plans were revised to increase the height to 44 stories and 504 feet (154 meters) for 117 residential units.

On March 15, 2008, a fatal crane accident occurred during construction, killing seven people. This incident was described by Mayor Michael Bloomberg as the worst construction accident in New York City's recent history. Construction was halted but resumed, and the building was completed in 2015.

The finished building, known as the Halcyon Building, has its street address listed as 305 East 51st Street.

303-309 E 51st St, Manhattan, NYC

Building Amenities for 303-309 E 51st St, Manhattan, NYC:

ASCOT at 309 East 51st Street offers:

Elevators

303 East 51st Street is a planned skyscraper with:

Residential units
Silver glass exterior
Angled balconies

303-309 East 51st Street, Manhattan, NYC, is a location with significant office and residential presence. However, specific details about office tenants rented or leased at this exact address are not readily available.

The area is known for its mix of residential and commercial properties, with nearby buildings like the Halcyon at 305 East 51st Street being notable residential developments.

For precise information on office tenants, it would be necessary to consult local business directories or property management companies directly involved with the site.

Internet Providers at 303-309 E 51st St, Manhattan, NYC

Several internet providers offer services in this area, including:

Verizon: Offers fiber internet with speeds up to 2,300 Mbps, available to 95.9% of the neighborhood.
Spectrum: Provides cable internet with speeds up to 1,000 Mbps, available to 98.8% of the neighborhood.
Earthlink: Offers fiber internet with speeds up to 2,300 Mbps, available to 95.9% of the neighborhood.
Astound Broadband: Offers cable internet with speeds up to 1,500 Mbps.
T-Mobile Home Internet: Offers fixed wireless internet with speeds varying from 25 Mbps to 100 Mbps.
STARRY: Offers fixed wireless internet with speeds up to 302 Mbps.

303-309 E 51st St, Manhattan, NYC is located near several transportation options. The closest subway station is the 51st Street station, which offers service on the Line 6 subway. This station is operated by the MTA and provides frequent service throughout the day.

The cross streets for this location are East 51st Street and Third Avenue. The area is also accessible by taxi or on foot, with Manhattan being a short distance away.

For those traveling from Manhattan to this location, the subway journey takes approximately 10 minutes and costs $3. Alternatively, a taxi ride takes about 4-5 minutes and costs between $15 and $22.

Nearby Office Tenants Leased

Ziff Brothers Investment leased 125,000 SF at 350 Park Avenue
Mitsubishi International Corp. leased 122,500 SF at 655 Third Ave
BDO Seidman leased 121,441 SF at 100 Park Ave
The United Nations leased 120,000 SF at 730 Third Ave
Convene leased 116,000 SF at 530 Fifth Avenue
McLaughlin & Stern leased 112,000 SF at 260 Madison Avenue
WeWork leased 111,500 SF at 750 Lexington Avenue
Katten leased 110,157 SF at 575 Madison Ave
TBWA Worldwide leased 107,308 SF at 488 Madison Ave
KPMG LLP leased 102,979 SF at 560 Lexington Ave

Nearby Retail Tenants Leased

Asanda Aveda leased 6,800 SF at 120 East 56th St
New York Golf Center leased 6,500 SF at 100 Park Ave
Francois Latapie leased 6,500 SF at 30 East 60th St
Armonk Farm Inc. leased 6,400 SF at 2 West 45th St
Nespresso leased 6,300 SF at 24 West 40th Street
Le Pain Quotidien leased 6,050 SF at 3 Park Ave
Brooks Brothers leased 6,000 SF at 11 East 44th St
National Basketball Association leased 6,000 SF at 590 Fifth Ave
JP Morgan Chase Bank leased 6,000 SF at 1 United Nations Plaza
Bo Concept leased 6,000 SF at 220 East 57th St

Nearby Tenants

Nearby Office Tenants Leased

Ziff Brothers Investment leased 125,000 SF at 350 Park Avenue
Mitsubishi International Corp. leased 122,500 SF at 655 Third Ave
BDO Seidman leased 121,441 SF at 100 Park Ave
The United Nations leased 120,000 SF at 730 Third Ave
Convene leased 116,000 SF at 530 Fifth Avenue
McLaughlin & Stern leased 112,000 SF at 260 Madison Avenue
WeWork leased 111,500 SF at 750 Lexington Avenue
Katten leased 110,157 SF at 575 Madison Ave
TBWA Worldwide leased 107,308 SF at 488 Madison Ave
KPMG LLP leased 102,979 SF at 560 Lexington Ave

Nearby Retail Tenants Leased

Asanda Aveda leased 6,800 SF at 120 East 56th St
New York Golf Center leased 6,500 SF at 100 Park Ave
Francois Latapie leased 6,500 SF at 30 East 60th St
Armonk Farm Inc. leased 6,400 SF at 2 West 45th St
Nespresso leased 6,300 SF at 24 West 40th Street
Le Pain Quotidien leased 6,050 SF at 3 Park Ave
Brooks Brothers leased 6,000 SF at 11 East 44th St
National Basketball Association leased 6,000 SF at 590 Fifth Ave
JP Morgan Chase Bank leased 6,000 SF at 1 United Nations Plaza
Bo Concept leased 6,000 SF at 220 East 57th St

VSA Consulting Group Testimonial

To whom it may concern: I am writing to recommend Stephen Sunderland and Optimal Spaces Inc. for the excellent job they did in finding us a lease at our new space. They were fast and effecient in locating spaces that met our needs and corporate image, aggressive in negotiating on our behalf, and effective in communicating our needs to the landlord and getting our offer accepted. I look forward to working with the team at Optimal Spaces Inc. again. Very truly yours, Jack Sichterman Partner/Managing Director

🤝 Tenant Representation: Optimal Spaces acts exclusively as a "Tenant Broker," only representing tenants, never landlords. ⚖️ Unbiased Service: Avoiding conflicts of interest, they provide impartial service, showing a wider range of properties and negotiating the best price. 🗂️ Comprehensive Process: Agents guide clients end-to-end, offering market surveys, floor plans, pricing expectations, and industry contacts. 🐷 Cost Savings: They negotiate rental price and identify/abate "hidden costs."
Why Optimal Spaces – Tenant Broker ✓ 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.
Why Use a Tenant Broker: Your Advocate in Commercial Real Estate 1. The Crucial Distinction: Whose Side Are They On? LANDLORD REP (Listing Agent) Fiduciary Duty: LANDLORD (Highest Rent, Best Terms for Landlord) FORLEASE TENANT REP (Tenant Broker) Fiduciary Duty: TENANT ONLY (Lowest Rent, Best Terms for Tenant) LEVELS THE PLAYING FIELD 2. It Almost Always Costs You Nothing 3. Access to “Hidden” Inventory 4. Negotiating Beyond Base Rent Landlord Pays Fee Free Expert Representation Public Websites (Limited/Dated) BROKER DATABASES & NETWORKS (Off-Market, Subleases, Future Availabilities) FREE RENT TI ALLOWANCE (Build-out Cash) OPEX CAPS (Limit Increases) LEASE FLEXIBILITY (Renewal/Expansion Options) 5. Time Savings & Process Management 6. Mitigating Risk (the “Gotchas”) Searching, Scheduling, RFPs Outsourced RE Dept. (Curated Options, Timeline Management) Restoration Clauses Holdover Penalties LEASE PROTECTION Spots Pitfalls in LOI & Lease Summary: Don’t rely on the landlord’s agent. A tenant broker is your advocate, provides better data, negotiates a complete package, and typically costs you nothing.