Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
870 United Nations Plaza #PH37/38B

For Sale · Listing by Sothebys International Realty

870 United Nations Plaza #PH37/38B

Midtown East, Manhattan

$3,450,000

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Active For Sale • Co-op

$3,450,000

$863 per sq ft

870 United Nations Plaza #PH37/38B

Midtown East, Manhattan

MLS® #RLS20126618

RLS at REBNY

Listing by Sothebys International Realty

Open Houses Scheduled

Saturday, November 14 • 12:00 PM – 2:00 PM

Saturday, November 14 • 12:00 PM – 2:00 PM

Sunday, November 15 • 12:00 PM – 2:00 PM

Sunday, November 15 • 12:00 PM – 2:00 PM

REBNY 2025: signed Buyer Representation Agreement required before any showing.

4
Bedrooms
3.5
Baths
4,000
Sq. Ft.
1967
Year Built

Quick Summary

Bedrooms 4
Bathrooms 0 full, 1 half
Living Area 4,000 sq ft
Lot Size 91,930.2 sq ft
Year Built 1967
Ownership Co-op
Maintenance $11,367/mo
Parking Garage, Valet
Neighborhood Midtown East
Floor 1 of 37

Property Highlights

  • Views: City, Skyline
  • Exposure: East,North,South facing
  • Outdoor Space: Deck

Property Details

Type Co-op
Ownership Stock Cooperative
Total Rooms 8
Baths 3 Full, 1 Half
Floor 1 of 37
View City, Skyline
Exposure East,North,South
Cooling Central Air, Other
Pets Yes, CatsOk, DogsOk
Year Built 1967
Living Area 4,000 sq ft
Parking Features Garage, Valet
Structure Type HighRise
Flooring Hardwood
Furnished Unfurnished
Lot Size 91,930.2 sq ft
Block/Lot 01360/7501

Listing History

Event Date Price Change
Listed Nov 13, 2026 $3,450,000 -
Currently Nov 13, 2026 $3,450,000 -

Recent Sales in This Building

What other apartments here closed for in the last three years, as reported to the REBNY Listing Service (RLS).

Closed Unit Beds Sold For Per Sq Ft
Aug 27, 2026 Unit 18A 2 BR $1,650,000 $994
Aug 17, 2026 Unit 31/32F 4 BR $2,900,000 -
Jul 17, 2026 Unit 14F 2 BR $1,999,999 $1,000
See every sale in this building

Description

870 UNITED NATIONS PLAZA PH 37/38B Light-Filled Penthouse Duplex in Historic Turtle Bay Neighborhood Has Breathtaking Unobstructed Views of NYC Here is your once-in-a-lifetime opportunity to own a beautifully appointed and impeccably designed three bedroom plus library in one of Manhattan’s premier residences. This residence boasts 9ft ceilings and a gracious layout and bright open city views. The Duplex was imagined and designed by legendary Master Architects Max Abramovitz and Wallace K. Harrison, who also designed the nearby United Nations Secretariat building. The Co-op is a multi-story masterpiece, with mid-century modern details such as plaster walls, high ceilings, hardwood flooring, (white marble flooring on the ground floor and hard wood upstairs) wood-burning fireplace, and a private elevator. This penthouse is the crowning jewel of one of the most modernist residential structures in New York City with wall to wall windows spread over two floors with amazing views from all rooms. Additional features of this incredible home include custom lighting, multiple zoned central air conditioning and generous closet space throughout. The sun drenched corner PH looks out on panoramic NW&E views and the greatest city in the world is literally at your feet. MAIN LEVEL 37TH FLOOR Enter through a private foyer that showcases a beautiful spiral staircase. The vast corner living boasts a wood burning fireplace with a finely crafted marble mantle. Other rooms on this level include a large privale bedroom with ensuite bathroom; an eat in kitchen with a dishwasher and a wine cooler; a formal dining room and library with direct and protected views of the East River and beyond; a laundry room with a washer and dryer; and a service entrance, UPPER LEVEL 38TH FLOOR Ascend to a second floor via the private elevator or the gorgeous spiral staircase to access the large Primary Suite which includes a dressing room and a custom marble bathroom with a luxurious rainfall shower, walk in closets and a spacious sitting room that could easily be converted into a fourth bedroom; a home office, or an additional bathroom as the space’s original plumbing remains intact. (There is a dressing room that could be converted back to an additional bathroom) The second and third bedrooms on this level both have ensuite bathrooms. ABOUT THE BUILDING 870 UN PLAZA is a prestigious luxury coop which has the longest private driveway in NYC, which leads to a grand triple height lobby. The superbly run full service building offers a 24 hour doorman, valet, and concierge service. The more than 50 staff members provide five star service and security elevating residents to a whole new level of lifestyle. Building amenities include an on site management office; state of the art fitness center with Pilates studio; golf simulator; billiards room; two conference rooms; an in house dry cleaning service; rooftop sun decks; heated indoor garage; and “Club39”, a private resident’s lounge and entertainment area. Pets are welcome, and there is a dog park across the street. A storage room transfers with the apartment. United Nations Plaza is conveniently situated near public transportation, shops, restaurants and the FDR Drive, which makes its location ideal for frequent commuters. Neighboring the 18 acre UN Complex makes this exquisite home the epitome of comfort, privacy, and serenity.

Features & Amenities

Interior Features

Entrance Foyer Eat In Kitchen Elevator High Ceilings Sauna Walk In Closets Building Washer Dryer Install Allowed Common On Floor Common Area In Unit Flooring: Hardwood Fireplace (1)

Exterior Features

Building Courtyard Building Garden Building Roof Deck Private Outdoor Space Over60 Sqft Deck

Building Amenities

Billiard Room Bike Storage Common Lounge Concierge Elevators Fitness Center Sauna Steam Room Sauna

Appliances

Dryer Dishwasher Wine Cooler Washer

Building Information

Building Data View Compliance & Permits
Total Units 85
Stories 37
Structure HighRise

Financial Details

Maintenance $11,367/mo

Midtown East is a dynamic hub that is the gateway to Manhattan for many. Home to iconic landmarks like Grand Central Terminal and the Chrysler Building, the neighborhood offers unparalleled convenience for commuters and professionals. The residential landscape is a mix of high-rise luxury towers and historic side-street cooperatives, providing a wide array of options for those who want to be at the center of the city's energy.

Midtown East Live Market Data

View Neighborhood

Active Listings

253

Median Asking Price

$1.79M

Median $/Sqft

$1,826

Avg Days on Market

N/A

New This Week

14

Price Reduced

27%

Sold (30 Days)

13

Median Sale Price

$1.75M

Live data from RLS at REBNY • Updated 11/13/26, 3:49 PM EST

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Location

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870 United Nations Plaza #PH37/38B, Midtown East, New York County

Virtual Tour

Floor Plans

Floor Plan 1

Building Information

Official NYC property records for this building

1967
Year Built
59 years old
37
Floors
C5-2
Zoning District
Condominiums

Tax & Assessment

Assessed Value: $64,098,272
Land Value: $10,664,999
Exemptions: $29,250,383

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

Lot Area: 88,357 SF
Building Area: 306,964 SF
Built FAR: 3.47
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 monthly maintenance are $11,367 per month. Confirm the exact amount with Milton Coste before making an offer.

The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.

This property has 4 bedrooms and 3 full bathrooms and 1 half bathroom.

The listed interior living area is 4,000 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1967, making it approximately 59 years old.

This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.

Pets are permitted at this property: Pets Allowed. Contact Milton Coste for weight limits or breed restrictions.

At the current list price of $3,450,000 for 4,000 sq ft, the asking price per square foot is approximately $863. 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 [email protected]. 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: RLS20126618
First Listed: 11/13/2026
On Market: 11/13/2026
Price Changed: 11/13/2026
Contract Date: 1/14/2026

Listing Courtesy of Sothebys International Realty - Pamela A Oconnor

Listing Contact: (212) 606-7709

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.

How working with a buyer's agent works: I work for you, not the seller. Before I show you anything, New York brokerage rules ask us to put that in writing: an agreement and a disclosure that say I work for you and negotiate on your behalf. The agreement is non-exclusive: you can work with other agents, it runs for a short fixed term we agree on, and you can end it with a note. You may attend open houses independently without an agreement. Read how it works

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 11/13/2026 at 8:49 PM UTC

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Milton Coste - NYC Real Estate Broker

Milton Coste

Licensed Real Estate Associate Broker

Keller Williams NYC

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Sale history, taxes, violations and comps for this unit

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Midtown East Market Update

13 sales last 30 days · $1.79M median · 19.5 months supply

Read Full Report

New listings in this neighborhood

Quick Facts

Status Active Type Co-op Neighborhood Midtown East Borough Manhattan
County New York
Floor 1 of 37
Year Built 1967
First Listed 11/13/2026
Living Area 4,000 sqft
Maintenance $11,367/mo

Monthly Costs Estimate

Down Payment 20%

$690,000

Interest Rate Loading...

Source: Freddie Mac PMMS

Loan Term 30 years

Est. Monthly Payment

$0

Principal & Interest $0
PMI (under 20% down) $0
Maintenance $11,367
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

$51,750

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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