Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433

SOLD FOR $19,000,000

· Closed June 12, 2019

9 E 84th Street

$19,000,000

$1,319 per sq ft

9 E 84th Street

Upper East Side, Manhattan

Belmont Mansion, The

MLS® #RLS10533274

RLS at REBNY

Listing by Prime Manhattan Residential

7

Bedrooms

6.5

Baths

14,403

Sq. Ft.

1901

Year Built

Quick Summary

Bedrooms 7
Bathrooms 6 full, 4 half
Living Area 14,403 sq ft
Year Built 1901
Neighborhood Upper East Side

Property Highlights

  • Outdoor Space: Building Patio, Building Terrace, Patio, Terrace, Rooftop
  • Fireplace: Wood-burning or decorative fireplace
  • Style: Prewar architecture

Property Details

Type Single Family Residence
Baths 6 Full, 4 Half
Cooling Building Cooling, Central Air
Pets Yes
Cross Street Fifth Avenue/Madison Avenue
Year Built 1901
Living Area 14,403 sq ft
Architectural Style Prewar
Parcel # 1496-0009
Block/Lot 1496/9

Listing History

Event Date Price Change
Listed Dec 14, 2018 $19,000,000 -
Currently Apr 27, 2026 $19,000,000 -

Description

This 25' wide Limestone mansion was built in 1901 by Warren and Wetmore, one of the most prolific architectural practices in America. Warren and Edmund Baylyes's Development Company built this Mansion for Ogden Mills Bishop and his family. The truly elegant facade recreated the typical composition of 19th century Parisian streetscape. Located off Fifth Avenue's prestigious Museum Mile stretch, this is a trophy residence spanning over 14,000 square feet that was...and will be again...a masterpiece.

The current owner painstakingly spent over six years gut renovating this sensational home. It was designed by Gabellini Sheppard and built to a standard of quality and craftsmanship that distinguishes 9 E 84th as a work of art. After it was completed in 2015, 9 E 84th was selected by the AAP (American Architectural Prize) jury as the winner of Interior Design / Residential for 2017.

Spanning 7 floors, this mansion features 6-8 bedrooms, 6 full bathrooms, 4 powder rooms, 15' soaring ceilings and arguably one of the most exquisite staircases that rivals the one in the Guggenheim. There is a large roof skylight, a rear terrace skylight and a light well that illuminates all levels of the house with brilliant natural light all day long. This is complemented further by the oversized windows on both the front and rear facades. Some of the amenities and features include a gym/yoga studio, basketball court, a 53' pool with separate hot tub as well as a salon with steam-shower, bathroom and changing room. The walk-able glass patio in the backyard delivers bright natural light into the pool and basketball court thru the light well. Additionally, there is a high speed elevator built with a seamless Corian interior that services every floor and the house includes every modern system one would want and includes multi-zone HVAC with added radiant heat under the stone floors, water filtration, Lutron lighting, electric shades & security system. All of the house systems are integrated and controlled by the Crestron/Siedle system. There is also the maids quarters featuring en-suite bathroom, separate work space and private entrance.

As you enter the house's first level, the marvelous entry foyer will captivate...you will be greeted by the truly extraordinary staircase that was conceived to create a dramatic yet serene entryway and it is made of stainless-steel, marble and glass. There is a mud-room that is the size of a modest sized bedroom with floor to ceiling custom Corian mill-work. Adjacent to the far side of the foyer is the eat-in kitchen which leads out to the north facing backyard and garden. There is also a powder room on this level.

Level 2 is the grand parlor floor that features 2 fireplaces (one wood-burning / one gas) the living room, dining room, butler's pantry, media room with theater-style screen that retracts into the ceiling when not in use. There is also a powder room.

On level 3 you will find the master suite that includes a large separate library/sitting room/office, the spa-like master bath, the main chamber with wood burning fireplace and enormous his and hers closets.

Level 4 is the main children's floor with 4 bedrooms, 2 full bathrooms and a full laundry room

Level 5 features the music & craft room and adjacent full bathroom, another bedroom with en-suite bath and a separate study-office.

The roof has N-S-E-W views and is another outdoor retreat.

In between the Level 1 and the Lower level 1 is the maid?s quarters that is fully contained, efficient and comfortable with its own entrance from the street.

On lower level 1 you will find the basketball court, the gym/yoga studio and a powder room. One flight down to lower level 2 is the salon that includes the spa-bathroom, steam shower & changing room. From the salon, you then pass thru the glass doors and you are greeted by the pool which is simply Stunning...

IMPORTANT NOTE...
...2 years ago, the house just to the west (7 E 84th St) had a fire and burned to the ground and caused interior damage (primarily smoke damage) to 9 E 84th. The damages have been remediated thru a rigorous and highly supervised process, and this was completed a little over a year ago. During this process, many of the fixtures in 9 E 84th St had to be removed in whole or in part. The house at this point will need the new owner to re-install "all of the fun things", meaning many of the finishes as it relates to the kitchen, some flooring, tiles, wall finishes etc. The house's structure and structural elements were not affected. This is truly a special situation with an extraordinary number of options making 9 E 84th St a must see...

Click link below for full size floor-plans
http://www.manhattanresidentialnyc.com/docs/9-east-84th-street.pdf

Features & Amenities

Interior Features

Common Area Fireplace

Exterior Features

Building Roof Deck Garden Building Patio Building Terrace Patio Terrace Rooftop

Building Information

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

341

Median Asking Price

$1.49M

Median $/Sqft

$1,546

Avg Days on Market

N/A

New This Week

28

Price Reduced

28%

Sold (30 Days)

32

Median Sale Price

$1.52M

Live data from RLS at REBNY • Updated 4/27/26, 2:25 PM EST

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Location

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9 E 84th Street, Upper East Side, New York County • Near Fifth Avenue/Madison Avenue

Floor Plans

Floor Plan
Floor Plan
Floor Plan
Floor Plan

Building Information

Official NYC property records for this building

1886
Year Built
140 years old
4
Floors
1
Residential Units
R8B
Zoning District
One Family Dwellings Historic District: Upper West Side / Central Park West Historic District

Tax & Assessment

Assessed Value: $550,440
Land Value: $258,120
Exemptions: $0

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

Lot Area: 1,916 SF
Building Area: 5,476 SF
Built FAR: 2.86
Allowed FAR: 4

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

This property has 7 bedrooms and 6 full bathrooms and 4 half bathrooms.

The listed interior living area is 14,403 square feet. Verify dimensions independently during due diligence.

According to MLS records, the building was constructed in 1901, making it approximately 125 years old.

Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.

At the current list price of $19,000,000 for 14,403 sq ft, the asking price per square foot is approximately $1,319. 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: RLS10533274
First Listed: 12/14/2018
Closed: 6/12/2019
Contract Date: 12/13/2018

Listing Courtesy of Prime Manhattan Residential - Robert Dankner

Listing Contact: (917) 951-2242

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 4/27/2026 at 6:25 PM UTC

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