Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $4,000,000

Listed at $4,950,000 · Sold 19.2% below asking · Closed November 21, 2025

Closed For Sale Condo

$4,950,000

$4,125 per sq ft

923 Fifth Avenue #15B

Upper East Side, Manhattan

MLS® #RLS11021529

RLS at REBNY

Listing by Sothebys International Realty

2

Bedrooms

2

Baths

1,200

Sq. Ft.

1949

Year Built

Quick Summary

Bedrooms 2
Bathrooms 2
Living Area 1,200 sq ft
Lot Size 14,800 sq ft
Year Built 1949
Ownership Condo
HOA/Common Charges $1,721/mo
Property Taxes $19,188/yr
Neighborhood Upper East Side
Floor 15 of 21

Property Highlights

  • Views: City, Park Greenbelt
  • Exposure: West facing
  • Outdoor Space: Building Terrace, Terrace

Property Details

Type Condo
Ownership Condominium
Total Rooms 4
Baths 2 Full
Floor 15 of 21
View City, Park Greenbelt
Exposure West
Pets Yes
Year Built 1949
Living Area 1,200 sq ft
Structure Type MultiFamily
Flooring Hardwood
Furnished Unfurnished
Lot Size 14,800 sq ft
Block/Lot 01388/1079

Listing History

Event Date Price Change
Listed Nov 15, 2024 $5,500,000 -
Currently Apr 25, 2026 $4,950,000 -10.0%

Description

923 Fifth Avenue is one of the few white-glove condominiums on Fifth Avenue, in the heart of the prestigious Upper East Side. There is no Board Approval required for purchase, and both financing and subletting are allowed. Just as a vivid fancy-colored diamond is intense, Apartment 15B is exceedingly rare. Offered for the first time in 24 years, 15B is in the front of the building, facing Central Park, with a private, setback outdoor patio for the most incredible views. Nestled between 923 Fifth Avenue's two major A and C-lines, the B-line feels like a five-star hotel suite, measuring a spacious 1200 square feet, with a huge oversized primary bedroom. At 923 Fifth, the three Park-facing lines, the A, B, and C lines, are the most valuable and rarely for sale. Most Fifth Avenue architects place the grandest apartments up front, and, all things considered, Apartment 15B would be impossible to duplicate today. For the pied a terre buyer or ex-New Yorker, 15B is a highly desirable alternative to a hotel or club. For co-op down-sizers, it's the perfect white-glove, high-service UES location, and for investors, an enduring and strategic luxury asset. In preparing the property for sale, the owners have restored the apartment to an immaculate "white box" state, with fresh paint and refinished floors. Many original details, such as custom fixtures in both bathrooms, and period built-ins in the second bedroom, were left intact. There are no summer work rules for renovators. There is a large, gracious entry foyer, king-sized primary suite, a secondary bedroom, two full baths, a windowed galley kitchen, original herringbone hardwood floors, thru-wall A/C, and generous, deep storage space throughout. Pets and in-unit washer/dryers are allowed. Located on the corner of East 73rd St and Fifth Avenue, this Lenox Hill location is arguably second to none, with delightful destinations in every direction. In-person showings by appointment are welcomed 11-4pm. The views from 15B are transformational -- seeing is believing! Note: Working Capital Contribution: 2.5% Payable by Purchaser

Features & Amenities

Interior Features

Common On Floor Common Area Laundry Room Flooring: Hardwood

Exterior Features

Private Outdoor Space Over60 Sqft Building Terrace Terrace

Appliances

Convection Oven Dishwasher

Building Information

Building Data View Compliance & Permits
Total Units 97
Stories 21
Structure MultiFamily

Financial Details

Common Charges $1,721/mo
RE Taxes $19,188/yr ($1,599/mo)
Original Price $5,500,000
Sale Price $4,000,000
Previous Price $5,500,000

The Upper East Side remains the gold standard for classic New York elegance. Known for 'Museum Mile' and its low-traffic, tree-lined streets, the neighborhood offers a refined lifestyle away from the midtown bustle. While famous for its historic cooperatives, the area has seen a recent surge in ultra-luxury new construction condos, particularly along the Second Avenue Subway corridor, making it a top choice for both traditionalists and modern buyers.

Upper East Side Live Market Data

View Neighborhood

Active Listings

340

Median Asking Price

$1.55M

Median $/Sqft

$1,560

Avg Days on Market

N/A

New This Week

30

Price Reduced

26%

Sold (30 Days)

31

Median Sale Price

$1.52M

Live data from RLS at REBNY • Updated 4/25/26, 6:12 AM EST

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Location

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923 Fifth Avenue #15B, Upper East Side, New York County

Virtual Tour

Floor Plans

Floor Plan

Building Information

Official NYC property records for this building

1951
Year Built
75 years old
20
Floors
96
Residential Units
R10
Zoning District
Condominiums Historic District: Upper East Side Historic District

Tax & Assessment

Assessed Value: $21,650,397
Land Value: $7,539,743
Exemptions: $139,246

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

Lot Area: 14,800 SF
Building Area: 148,586 SF
Built FAR: 10.04
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 $1,721 per month. Confirm the exact amount with the listing broker before making an offer.

The current listed annual property tax is $19,188, or roughly $1,599 per month. Verify the current assessment with your attorney before closing.

This property has 2 bedrooms and 2 full bathrooms.

The listed interior living area is 1,200 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1949, making it approximately 77 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. Contact the listing broker for weight limits or breed restrictions.

At the current list price of $4,950,000 for 1,200 sq ft, the asking price per square foot is approximately $4,125. 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 mcoste@kwnyc.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: RLS11021529
First Listed: 11/15/2024
On Market: 11/15/2024
Price Changed: 5/6/2025
Closed: 11/21/2025
Contract Date: 11/15/2024

Listing Courtesy of Sothebys International Realty - Gordon T Roberts

Listing Contact: (212) 400-8710

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 4/25/2026 at 10:12 AM UTC

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