NOT LISTED FOR SALE
7 Beds
12 Baths
18,000 Sq Ft
2,500 Sq Ft Lot

Sale Details

Date Sold: March 17, 2026

Last sale price $34,500,000 $1,917 Per Sq Ft

406 Days on Market

Highlights

  • Green Building
  • Terrace
  • Fireplace
  • Vaulted Ceiling

About This Home

As of March 2026

SPECTACULAR BEAUX-ARTS LIMESTONE MANSION

A Rare Opportunity to Acquire a 1901 Gilded Age Masterpiece

Nestled just off Fifth Avenue's prestigious Gold Coast, this approximately 18,000-square-foot Beaux-Arts limestone mansion is a once-in-a-lifetime offering. With six above-grade floors and two below-grade levels, this architectural treasure is one of the few remaining mansions of the Gilded Age in Manhattan

Behind its commanding limestone facade lies an array of extraordinary rooms with soaring ceilings, exceptional proportions, and an abundance of irreplaceable original architectural details. Highlights include a majestic marble staircase, a copper-balconied landing overlooking the parlor, intricately coffered ceilings, and exquisite period moldings throughout.

Designed in 1901 by John H. Duncan, one of America's preeminent architects of the era, the mansion exemplifies his timeless craftsmanship. Duncan is celebrated for landmark projects such as General Grant "s National Memorial (1897) overlooking the Hudson River and the Soldiers" and Sailors" Arch in Brooklyn's Grand Army Plaza. His influence resonates in every corner of this magnificent home.

A Layout that Marries Historic Grandeur with Modern Potential

Entrance Floor:

The grand entrance begins with a stately vestibule secured by original double bronze doors, opening to a breathtaking 56'gallery with 12'7" soaring ceilings. A sweeping marble staircase ascends gracefully to the parlor level, complemented by an elevator featuring exquisite period paneling. The gallery leads to a stunning oval dining room adorned with carved woodwork. Beyond is a large, windowed space which would be perfect as a service kitchen connecting to the main kitchen below.

Parlor Floor:

The parlor floor is unparalleled in its architectural richness, featuring 16'9" ceilings - A remarkable height.

A grand paneled library with a fireplace and two huge, south-facing Palladian French windows overlooks 63rd Street. Opposite the landing is a resplendent drawing room with a fireplace, mirrored walls, intricate moldings, and ornate stonework extending to the ceilings. Beyond are an Anteroom, Bar area and Pantry. French door lead to an entertaining terrace and complete this level.

Third Floor:

Designed as an opulent master suite, this floor features 12" ceilings and includes a front-facing sitting room with two tall French windows, a spacious dressing area, and two luxurious marble bathrooms.

Fourth Floor:

The fourth floor offers two expansive bedrooms, each featuring its own large sitting room, fireplace, and ensuite bath.

Fifth Floor:

A remarkable double-height sitting room with a fireplace and a dramatic Palladian window defines the fifth floor. This level also includes two additional bedrooms with dressing areas and ensuite baths, as well as a kitchenette and dining area.

Sixth Floor:

The sixth floor features a balcony and atrium overlooking the sitting room below, along with an additional and large, sunny bedroom with ensuite bath. This floor boasts two terraces: a north-facing terrace with views of the Upper East Side's landmarks and a south-facing terrace offering breathtaking panoramas of Midtown's skyline including Billionaires'Row to the west and partial views of Central Park.

First Lower Level:

Originally designed as a very large eat-in kitchen, this level features up to 11" vaulted ceilings, beautiful original cabinetry, and a service entrance on the 63rd Street side secured with double doors. At the rear is an outdoor atrium/walled garden which fills the space with natural light. Part of this first lower level may also be perfect to accommodate large staff and security quarters.

Second Lower Level:

Fully built out and partially windowed, this recreation level presents endless possibilities for a spa, gym, or even an indoor swimming pool.

A Rare Chance to Own a New York City Landmark

15 East 63rd Street is a truly extraordinary offering. For the discerning buyer, it represents an unparalleled opportunity to preserve the wealth of architectural provenance while allowing the lucky buyer to incorporate state-of-the-art technology and amenities

Last Agent to Sell the Property

Sami Hassoumi

Brown Harris Stevens Residential Sales LLC License #30HA0765456 Listed on: 01/15/2025

Brown Harris Stevens Residential Sales LLC

Last Buyer's Agent

Deborah Kern

Corcoran Group License #10301202299

Corcoran Group
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Home Details

Home Type

  • Single Family

Est. Annual Taxes

  • $204,948

Year Built

  • Built in 1910

Lot Details

  • 2,500 Sq Ft Lot
  • Lot Dimensions are 100.00x25.00

Home Design

  • Entry on the 1st floor

Interior Spaces

  • 18,000 Sq Ft Home
  • Vaulted Ceiling
  • Fireplace
  • Laundry in unit

Bedrooms and Bathrooms

  • 7 Bedrooms

Eco-Friendly Details

  • Green Building
  • Smoke Free Home

Additional Features

  • Terrace
  • No Cooling

Community Details

  • Lenox Hill Subdivision
  • 5-Story Property

Listing and Financial Details

  • Legal Lot and Block 0012 / 01378

Home Details

Home Type

Single Family

Est. Annual Taxes

$204,948

Year Built

Built in 1910

Lot Details

2,500 Sq Ft Lot

Listing Details

  • Property SubType: Single Family Residence
  • Property Type: Residential
  • Neighborhood: Lenox Hill
  • Architectural Style: Walk-Up
  • Entry Level: 1
  • Special Features: None
  • Property Sub Type: Detached
  • Stories: 5

Interior Features

  • Interior Features: Smoke Free
  • Fireplace: No
  • Living Area: 18000.0
  • Living Area Units: Square Feet
  • Basement: No
  • Basement: Other

Beds/Baths

  • Full Bathrooms: 8
  • Half Bathrooms: 4
  • Bathrooms Integer: 9
  • Bedrooms: 7

Exterior Features

  • View: Other
  • View: No
  • Exterior Features: Private Outdoor Space Under 60 Sqft
  • Patio/Porch Features: Terrace

Garage/Parking

  • Garage: No

Utilities

  • Laundry Features: In Unit
  • Green Building Features: Green Building
  • Cooling: No

Condo/Co-op/Association

  • Common Interest: None

Lot Info

  • Lot Size Units: Square Feet
  • Lot Size Area: 2500.0
  • Lot Size Dimensions: 100.00x25.00

Rental Info

  • Land Lease: No

Building Info

  • New Construction: No
  • Units: 1
  • Total Stories: 5
  • Year Built: 1910

Tax Info

  • Tax Block: 01378
  • Tax Lot: 0012
  • Tax Annual: 204948.0

Multi Family

  • Building Area Units: Square Feet

Ownership History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Name Owned For Owner Type

Purchase Details

Listed on
Jan 15, 2025
Closed on
Mar 17, 2026
Sold by
Bought by
Seller's Agent
Sami Hassoumi
Brown Harris Stevens Residential Sales LLC
Buyer's Agent
Deborah Kern
Corcoran Group
List Price
$39,500,000
Sold Price
$34,500,000
Premium/Discount to List
-$5,000,000
-12.66%
Views
1573

Purchase Details

Closed on
Nov 13, 2018
Sold by
Bought by

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$1,000,000
Interest Rate
4.8%
Mortgage Type
Unknown
Source: Public Records

Home Values in the Area

Source: Public Records

Average Home Value in this Area





Source: Public Records

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Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Buyer Sale Price Title Company
$34,500,000 --
$6,000,000 --
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Borrower Loan Amount
Previous Owner $1,000,000
Previous Owner $1,300,000
Previous Owner $4,340,000
Previous Owner $1,080,000
Previous Owner $1,800,000
Previous Owner $1,200,000
Previous Owner $1,080,000
Closed $4,000,000
Closed $543,905
Source: Public Records

Property History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Event Price List to Sale Price per Sq Ft
03/19/2026 03/19/26 Price Changed $34,500,000 0.0% $1,917 / Sq Ft
03/17/2026 03/17/26 Sold $34,500,000 -12.7% $1,917 / Sq Ft
02/25/2026 02/25/26 Pending -- -- --
01/15/2025 01/15/25 For Sale $39,500,000 -- $2,194 / Sq Ft
Source: Real Estate Board of New York (REBNY)

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2026 $221,343 $1,912,400 $354,050 $1,558,350
2025 $204,980 $1,770,742 $262,254 $1,508,488
2024 $204,980 $1,639,577 $900,000 $1,351,426
2023 $186,229 $1,518,127 $306,785 $1,211,342
2022 $183,073 $5,566,950 $900,000 $4,666,950
2021 $180,457 $4,565,700 $900,000 $3,665,700
2020 $169,896 $4,432,500 $900,000 $3,532,500
2019 $159,064 $3,693,600 $900,000 $2,793,600
2018 $148,531 $1,167,790 $341,459 $826,331
2017 $146,397 $1,151,008 $380,687 $770,321
2016 $145,886 $1,131,598 $401,347 $730,251
2015 $59,467 $1,047,776 $390,670 $657,106
2014 $59,467 $970,164 $304,604 $665,560
Source: Public Records

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Map

Source: Real Estate Board of New York (REBNY)

MLS Number: RLS11029238

Real Estate Board of New York (REBNY)

APN: 01378-0012

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