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34 E 70th Street, 
Manhattan, NY 10021

$26,800,000


8

Beds


8

Baths


12,500

Sq Ft


Single Family

Active

Listed by

Carrie Chiang

Andres Perea

Corcoran Group

Last updated:

December 29, 2025, 07:56 PM

MLS#

RLS11025768

Source:

NY REBNY

About This Home

34 E 70th Street

The James P. Warburg Mansion: A Rare Opportunity on Manhattan's Upper East Side
Exceptional Double-Width Mansion in a Prime UES Location
37 ft Wide / 12,500 sqft approx./ Landmarks Approved

Located on one of Manhattan's most prestigious tree-lined streets between Madison and Park Avenues, the James P. Warburg Mansion presents a once-in-a-lifetime opportunity to create a bespoke residence. This 37-foot-wide, nearly 13,000 square-foot mansion is set on an expansive 37 ft x 100 ft lot and features a front courtyard, second-floor terrace, and a 30-foot garden setback.

Delivered with landmark approval, a Spanish sandstone fa ade, construction approval, building permits, and floor area permits, this property is a historic gem waiting to be reimagined.

A Storied History and Architectural Legacy

The Warburg family, renowned for their contributions to finance, art, and philanthropy, called this residence home. The mansion stands as a testament to the family's enduring legacy. Originally built in 1900 as two-row houses, the property was transformed in the 1920s into a single residence by acclaimed architect William Lawrence Bottomley, a graduate of the Ecole des Beaux-Arts in Paris and one of New York's most distinguished designers.

Bottomley's influence can be seen in the mansion's timeless neo-Medieval design, featuring elegant archways, clean architectural lines, and the distinct Spanish sandstone facade that distinguishes it from neighboring homes.

Prime Upper East Side Location

This residence sits on the south side of East 70th Street, a block known for its historic and architectural significance. Neighboring iconic institutions like the Frick Museum and notable homes of distinguished families such as the Lehmans and Wertheims, the mansion offers a rare combination of history, elegance, and convenience. Its north-facing position ensures an abundance of natural light throughout the day, accentuating its grand interiors.

Limitless Potential: A Blank Canvas for Modern Luxury

This mansion offers approximately 12,439 square feet of interior space, ready to be transformed into a modern masterpiece. Each of its five stories features soaring ceilings of up to 15 feet, enhancing the sense of grandeur and scale.

The expansive layout includes:

Five levels plus a cellar, perfect for luxurious living and entertaining.
A second-floor terrace for private outdoor enjoyment.
A front courtyard and rear garden that provide opportunities to create a serene outdoor oasis in the heart of Manhattan.

With its flexible design potential, the property is a canvas for crafting an extraordinary home that reflects your personal vision, seamlessly blending historic elegance with contemporary comforts.

Outdoor Space with Endless Possibilities

The mansion's 30-foot rear garden setback and ample outdoor spaces offer the opportunity to create a private urban sanctuary. Whether it becomes a lushly landscaped garden, an alfresco dining area, or an entertainer's paradise, the outdoor areas perfectly complement the grandeur of the interiors.

Architectural Brilliance

William Lawrence Bottomley, celebrated for his works across Manhattan, including the River House and Turtle Bay Gardens, merged two historic structures to create this masterpiece in the 1920s. His design honors the property's original neo-medieval charm while allowing for modern adaptations, offering the perfect balance of timeless craftsmanship and contemporary functionality.

An Unparalleled Opportunity

The James P. Warburg Mansion represents the ultimate in Upper East Side townhouse living. Its rich history, architectural pedigree, soaring ceilings, and grand proportions offer the chance to create a legacy property that will endure for generations.

This is more than a home-it's a statement of timeless sophistication and elegance, set in one of the most desirable locations in Manhattan.

Home Facts

Single Family

8 Baths

8 Bedrooms

Built in 1900

Price Summary

26,800,000

$2,144 per Sq. Ft.

MLS #:

RLS11025768

Last Updated:

December 29, 2025, 07:56 PM

Added:

a year ago


Rooms & Interior

Bedrooms

Total Bedrooms:

8

Bathrooms

Total Bathrooms:

8

Full Bathrooms:

7

Interior

Living Area:

12,500 Sq. Ft.


Structure

Structure

Building Area:

12,500 Sq. Ft.

Year Built:

1900


Finances & Disclosures

Finances

Price:

$26,800,000

Price per Sq. Ft:

$2,144 per Sq. Ft.

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This 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. RLS Data display by Coldwell Banker Warburg This advertisement does not suggest that the broker has a listing in this property or properties or that any property is currently available.

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Contact an Agent

Yes, I would like more information. Please use and/or share my information with a Coldwell Banker ® affiliated agent to contact me about my real estate needs. By clicking Contact, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If a Coldwell Banker affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE®, CENTURY 21®, Corcoran®, ERA®, or Sotheby's International Realty®). I acknowledge that I have read and agree to the terms of use and privacy notice.