Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
100 UNITED NATIONS Plaza #PH50B

For Sale · Listing by Corcoran Group

100 UNITED NATIONS Plaza #PH50B

Turtle Bay, Manhattan

$4,900,000

Interested in this property?
Active For Sale Condo

$4,900,000

$1,621 per sq ft

100 UNITED NATIONS Plaza #PH50B

Turtle Bay, Manhattan

MLS® #RLS20108985

RLS at REBNY

Listing by Corcoran Group

3
Bedrooms
3.5
Baths
3,023
Sq. Ft.
1986
Year Built

Quick Summary

Bedrooms 3
Bathrooms 4 full, 2 half
Living Area 3,023 sq ft
Year Built 1986
Ownership Condo
HOA/Common Charges $5,638/mo
Property Taxes Contact for details
Parking Garage
Neighborhood Turtle Bay
Floor 50 of 52

Property Highlights

  • Views: City, Panoramic, River
  • Exposure: North,South,West facing
  • Outdoor Space: Wrap Around

Property Details

Type Condo
Ownership Condominium
Total Rooms 7
Baths 3 Full, 2 Half
Floor 50 of 52
View City, Panoramic, River
Exposure North,South,West
Pets NumberLimit, Yes
Year Built 1986
Living Area 3,023 sq ft
Parking Garage Available
Structure Type HighRise
Basement Other
Block/Lot 01341/1657

Listing History

Event Date Price Change
Listed Sep 14, 2026 $4,900,000 -
Currently Sep 15, 2026 $4,900,000 -

Description

Bask in breathtaking panoramic views from two levels of wrap-around terraces at this rarely available, 50th floor Penthouse Duplex at 100 United Nations Plaza Condominium. Floating high in the sky in Midtown East's Turtle Bay neighborhood is this exceptional, mint condition 3 bedroom, 3 full and 2 half bathroom penthouse duplex boasting 2 sprawling wrap-around terraces - offering never-ending skyline and river views including such notables as One World Trade, Empire State Building, Chrysler Building, the Queensboro Bridge, East River and so much more. Spanning approximately 3,023 interior square feet and 1,113 of outdoor space, this duplex is ideally configured providing separate living, dining and entertaining areas from the upper floor's three private sleeping quarters. Upon entering the main level is the approximately 55' long gallery with unobstructed views to the west through its floor-to-ceiling windows. To the south, you will find a grand living and entertaining room with a corner exposure and access to the lower level balcony. A tray ceiling with recessed lighting, wet bar and concealed flat screen television complete this expansive space. Occupying the north side of this floor is the corner dining room from which you can also access the balcony to take in a sunny afternoon or glorious evening sunset. The large, windowed kitchen has a pass-through to the dining room for effortless entertaining and features custom cabinetry, granite countertops, marble wall tile and a suite of professional-grade appliances from Viking, Wolf and Sub-Zero, including a pair of dishwashers and full size wine refrigerator. Just beyond the kitchen is a stacked washer and dryer as well as a custom designed, windowed home office (which could also be utilized as a staff room) with an en suite powder room. Ascend to the second floor and you will find a guest powder room, corner primary suite and two more bedrooms, each with its own en suite windowed bathroom. The private primary suite enjoys its own access to the upper terrace and features an opulent windowed bathroom finished in floor-to-ceiling marble, an extra-large, glass-enclosed shower with two built-in rain shower heads, and a built-in vanity with dual vessel sinks. Five built-in wardrobes and a custom-outfitted walk-in closet allow for maximum storage. On the opposite side on this floor are the sizable second and third bedrooms, one with a corner exposure and sliding doors to the wrap terrace and the third with a bright southern exposure. Additional features of this impressive home include touch screen remote-controlled central heat and A/C, custom lighting, automatic roller shades in every room, built-in audio system, custom cabinetry, beautiful hardwood floors and recessed lighting. Both wrap-around terraces have been upgraded with ceramic floor tile, halogen lighting and a watering system. Located on East 48th Street and First Avenue,100 United Nations Plaza is a white-glove, full service condominium in Manhattan's Turtle Bay neighborhood. Greeting residents with beautifully landscaped gardens and waterfalls, this impeccably run building offers a 24-hour doorman, valet and concierge service, on-site management office, renovated lobby and resident's lounge, common laundry room, recently renovated fitness center and direct access to an attended parking garage. Conveniently located to transportation and many great shops and restaurants. 1 dog per unit, max 50 lbs. Showing by appointment only.

Features & Amenities

Interior Features

Separate Formal Dining Room Storage Building Other Washer Hookup In Unit

Exterior Features

Building Courtyard Private Outdoor Space Over60 Sqft Wrap Around

Building Amenities

Bike Storage Cold Storage Elevators

Appliances

Dishwasher

Building Information

Building Data View Compliance & Permits
Total Units 236
Stories 52
Structure HighRise

Financial Details

Common Charges $5,638/mo
RE Taxes Contact for details

Turtle Bay is a refined and diplomatic corridor, home to the United Nations Headquarters and numerous international consulates. The neighborhood is famous for the historic Turtle Bay Gardens and its tree-lined streets. Real estate in Turtle Bay offers a wide selection, from elegant pre-war townhouses to modern luxury condominiums that provide a low-traffic residential atmosphere just steps away from the bustle of Midtown.

Turtle Bay Live Market Data

View Neighborhood

Active Listings

116

Median Asking Price

$1.17M

Median $/Sqft

$1,495

Avg Days on Market

N/A

New This Week

11

Price Reduced

34%

Sold (30 Days)

20

Median Sale Price

$1.03M

Live data from RLS at REBNY • Updated 9/15/26, 10:17 AM EST

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Location

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100 UNITED NATIONS Plaza #PH50B, Turtle Bay, New York County

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1984
Year Built
42 years old
49
Floors
236
Residential Units
C1-9
Zoning District
Condominiums

Tax & Assessment

Assessed Value: $63,980,556
Land Value: $9,495,005
Exemptions: $2,256,084

Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.

Lot Area: 25,179 SF
Building Area: 357,793 SF
Built FAR: 14.21
Allowed FAR: 10

Source: NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning (data.cityofnewyork.us)

Want help estimating ownership costs or understanding building compliance? Let's discuss

Frequently Asked Questions

Common questions about this property

The current listed common charges are $5,638 per month. Confirm the exact amount with Milton Coste before making an offer.

This property has 3 bedrooms and 3 full bathrooms and 2 half bathrooms.

The listed interior living area is 3,023 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1986, making it approximately 40 years old.

This listing is a condominium. Buyers receive a deed to their individual unit and own their space outright, subject to condo association rules.

Pets are permitted at this property: 50 lbs 1 Dog Allowed for Unit Owners,Building Pets Allowed Comments:50 lbs 1 Dog Allowed for Unit Owners. Contact Milton Coste for weight limits or breed restrictions.

At the current list price of $4,900,000 for 3,023 sq ft, the asking price per square foot is approximately $1,621. This figure is for reference only and may differ from appraised or assessed values.

To schedule a private showing, contact Milton Coste at (917) 416-7433 or milton@miltoncoste.com. Per REBNY guidelines effective 2025, a Buyer Representation Agreement is required before a buyer's broker can show you properties. You may attend open houses independently without one.

Have a question not answered here?

(917) 416-7433
MLS® ID: RLS20108985
First Listed: 8/12/2026
On Market: 9/14/2026
Contract Date: 7/31/2026

Listing Courtesy of Corcoran Group - Michael J Weiss

Listing Contact: (917) 656-8444

Listing information for certain New York City properties provided courtesy of the Real Estate Board of New York's Residential Listing Service (the "RLS"). The information contained in this listing has not been verified by the RLS and should be verified by the consumer. The listing information provided here is for the consumer's personal, non-commercial use. Retransmission, redistribution or copying of this listing information is strictly prohibited except in connection with a consumer's consideration of the purchase and/or sale of an individual property. This listing information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., all rights reserved. This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

Broker Commission Disclosure: Broker commissions are not set by law and are fully negotiable.

Buyer Notice: Planning to work with a buyer's broker? A Buyer Representation Agreement is required before your broker can show you properties, per REBNY/UCBA guidelines (effective 2025). You may attend open houses independently without one.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 9/15/2026 at 2:17 PM UTC

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Turtle Bay Market Update

20 sales last 30 days · $1.17M median · 5.8 months supply

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Quick Facts

Status Active Type Condo Neighborhood Turtle Bay Borough Manhattan
County New York
Floor 50 of 52
Year Built 1986
First Listed 8/12/2026
Parking Garage
Living Area 3,023 sqft
Common Charges $5,638/mo

Monthly Costs Estimate

Down Payment 20%

$980,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Common Charges $5,638
Total Monthly $0

Estimates only. Consult a lender for exact figures.

Mansion tax applies at this price point

New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $3M to $4,999,999 at 1.50%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.

Estimated mansion tax at asking

$73,500

Run the numbers on a different offer price

Estimate based on the asking price. Confirm your own obligation with your real estate attorney.

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