For Sale · Listing by Compass
170 E 77th Street #6A
Lenox Hill, Manhattan
$3,595,000
170 E 77th Street #6A
MLS® #RLS20110714
Listing by Compass
Open House Scheduled
Sunday, September 27 • 11:00 AM – 12:00 PM
REBNY 2025: signed Buyer Representation Agreement required before any showing.
- 4
- Bedrooms
- 4
- Baths
- 2,547
- Sq. Ft.
- 1940
- Year Built
Quick Summary
Property Highlights
- Exposure: North facing
- Climate Control: Central Air
- Character: Pre-war building (1940)
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 22, 2026 | $3,595,000 | - |
| Currently | Sep 22, 2026 | $3,595,000 | - |
Description
Welcome to Residence 6A, an expansive 2,547-square-foot, loft-like four-bedroom, four-bathroom home with an in-unit washer/dryer, located in the heart of the Upper East Side within the full-service Diamond House condominium. A gracious entry foyer with double coat closets opens to a sophisticated dining gallery and an impressive step-down great room overlooking 77th Street. The spacious living area features beamed ceilings, beautiful hardwood floors, casement windows, and abundant natural light. The windowed eat-in chef’s kitchen is designed for both everyday living and entertaining, offering generous stone countertops, abundant custom cabinetry, a breakfast bar, and room for a dining table. Top-of-the-line stainless steel appliances include a Sub-Zero refrigerator and wine cooler, along with a Gaggenau cooktop and dual wall ovens. Thoughtfully designed with two separate bedroom wings, the home offers exceptional privacy and flexibility. The corner primary suite features an East-facing bay window, a wall of custom closets, and a luxurious en-suite marble bathroom with a soaking tub, double vanity, and separate glass-enclosed shower. The second bedroom, which also works beautifully as a home office, is conveniently located nearby and served by a full hall bathroom with a stall shower. The spacious third and fourth bedrooms each offer excellent closet space and their own full windowed bathrooms, with one enjoying en-suite access. The washer/dryer is discreetly located in the hallway of this bedroom wing. The Diamond House is a distinguished prewar condominium with full-time staff and an impressive array of amenities, including a beautifully landscaped roof deck, fitness center, and bike room. Ideally situated on the Upper East Side, the residence is moments from the neighborhood’s finest cultural institutions, restaurants, shopping, and convenient public transportation. A rare combination of scale, privacy, gracious entertaining space, and modern comfort in one of the Upper East Side’s most desirable locations. Taxes reflected include condo abatement.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
Building Information
Financial Details
About Lenox Hill
View All Lenox Hill ListingsLenox Hill occupies a residential section of the Upper East Side, defined by proximity to Central Park, major medical institutions (Memorial Sloan Kettering, Weill Cornell, Lenox Hill Hospital), and the Madison Avenue retail corridor. Housing stock ranges from large pre-war cooperatives to modern condominiums with East River and skyline views.
Lenox Hill Live Market Data
View NeighborhoodActive Listings
605
Median Asking Price
$1.40M
Median $/Sqft
$1,520
Avg Days on Market
N/A
New This Week
48
Price Reduced
25%
Sold (30 Days)
76
Median Sale Price
$1.35M
Live data from RLS at REBNY • Updated 9/22/26, 2:10 PM EST
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Location
170 E 77th Street #6A, Lenox Hill, New York County
Floor Plans
Building Information
Official NYC property records for this building
Tax & Assessment
Note: Individual unit taxes may differ. Verify current tax bills with NYC DOF.
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
Listing Data
RLS® at REBNY (Real Estate Board of New York) via Trestle API. Updated in real-time.
Building Data
NYC PLUTO (Primary Land Use Tax Lot Output), NYC Department of City Planning. Updated quarterly.
Market Data
RLS® at REBNY (Real Estate Board of New York). Live data updated in real-time.
Map & Location
OpenStreetMap contributors via Leaflet. Geocoding via Nominatim.
All data is provided for informational purposes only and should be independently verified. See our Data Sources Policy for more information.
Frequently Asked Questions
Common questions about this property
The current listed common charges are $3,710.53 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $36,930.72, or roughly $3,078 per month. Verify the current assessment with your attorney before closing.
This property has 4 bedrooms and 4 full bathrooms.
The listed interior living area is 2,547 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1940, making it approximately 86 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.
Pet policy requires confirmation with Milton Coste.
At the current list price of $3,595,000 for 2,547 sq ft, the asking price per square foot is approximately $1,411. 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) 416-7433Listing Courtesy of Compass - Allison L Chiaramonte
Listing Contact: (646) 248-0193
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 Data display by Keller Williams NYC. Data last updated on 9/22/2026 at 6:10 PM UTC
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Quick Facts
Monthly Costs Estimate
$719,000
Source: Freddie Mac PMMS
Est. Monthly Payment
$0
Estimates only. Consult a lender for exact figures.
Mansion tax applies at this price point
New York State charges the buyer a mansion tax on residential purchases at $1,000,000 or more. At this asking price the tier is $3M to $4,999,999 at 1.50%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.
Estimated mansion tax at asking
$53,925
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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