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107 East 70th Street
Upcoming Open House
Single Family Home
/mo HOA
Built in

Lauded as “The Best House on the Best Block” by The New York Times, The Thomas Lamont mansion is extremely impressive in scale, architecturally significant, and supremely situated on one of the most coveted and loveliest tree-lined blocks on the Upper East Side. Commissioned by Thomas W. Lamont, a partner at J. P. Morgan & Company, the renowned architecture firm of Walker & Gillette created a Tudor-revival mansion on the 55-foot wide mid-block lot. Anointed by many of New York’s influential families, the firm is well-known for celebrated and important residential buildings, such as the Charles E. Mitchell House (now the French Consulate), the Henry P. Davison House (now the Italian Consulate), and the William Goadby Loew House (now the Spence School), as well as the Fuller Building and the East River Savings Bank. The six-story landmarked mansion has had but two owners in its 100-year history: Thomas and Florence Lamont, and the Visiting Nurse Service, to which it was bequeathed by Mrs. Lamont upon her death in 1954. Constructed in 1922, Walker & Gillette’s fanciful and imaginative design incorporates leaded-glass windows, a cloistered side garden, planned irregular patterns of masonry work, and a picturesque roofline of grouped chimney flues. Gracefully set back from the street by ten feet, the house is visually resplendent. Charming detail abounds. Inside, the house retains a few marvelous and significant original rooms, such as an oak-paneled library with an ornately-carved marble mantle, thirteen and a half-foot ceilings with carved plaster detail, and very tall leaded-glass windows. While these rooms have been preserved, and the house has been extremely well and maintained and updated to today’s systems, much of the house has been converted to flexible and modern office space, most recently by Breyer Blinder Belle in 2009. Conveniences that have been overseen during the conversion include a hydraulic elevator and a water-cooled central air conditioning system with two chillers, each with four condensers. At nearly 23,000 interior square feet and with over 2,500 square feet of outdoor space, the 50-foot wide building offers myriad possibilities.

Interior features


  • Gardens
  • Elevator
  • Security System
  • Storage Area
  • Wheel Chair Accessible
  • Security System
  • A/C
  • Central A/C
  • Fireplace
  • Hardwood
  • # of Full Bathrooms: 14
  • # of Bedrooms: 10
  • # of Rooms: 22

Exterior features


  • High Tech Cabling
  • In-City
  • eGallery Listing
  • QC Approved Listing



  • Deck
  • Patio
  • Terrace

Price history
Responsible broker
Licensed Associate Real Estate Agent
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Floor plans
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Mortgage calulator

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107 East 70th Street
NY 10021
Monthly cost

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Daria was my realtor during my first-time homebuying journey in fall 2020. I started the process knowing little about homebuying, but with Daria in my corner, I felt confident at every step of the way. Daria has a remarkable overlapping skill set of detail orientation, responsive communication, deft negotiation, and all-around expertise — and on top of all that, she is a wonderful and kind person who took my preferences and desires to heart throughout the process. In less than ten weeks, we went from our first time meeting each other to closing escrow on a condo that I love — one that I can picture myself in for many years to come. She is even still involved post-purchase to help me with my move-in and interior decorating. I am happy and satisfied with the end result and I have Daria's guidance and expertise to thank for it. I recommend Daria highly to anyone interested in buying a property in San Francisco. It was truly a pleasure to work with her.
Daria is a dream come true. She gave excellent advice, she took charge so the entire process was low maintenance for me. She was super responsive to all of my questions and concerns and most importantly she got me a great result quickly. Nothing but good vibes.
Daria Saraf is an extremely capable, thoughtful, thorough, organized, and savvy realtor and human being. You could not be in better hands as a buyer or seller if you work with Daria. She is a seasoned professional, knows the Bay Area market intimately and has a keen sense of how best to position your property. My property needed a fair amount of work in a very short amount of time. A daunting challenge to me, for Daria it was a breeze to organize and solve. She has a very skilled and respectful team of contractors with whom she can transform your property into something that would be found no the pages of Architectural Digest. This woman is a pro. You will be both lucky and extremely happy if you can work with her.

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