21 E 79th Street #7
MLS® #RLS20101753
Listing by Compass
- 4
- Bedrooms
- 4.5
- Baths
- N/A
- Sq. Ft.
- 1930
- Year Built
Quick Summary
Property Highlights
- Views: City, Skyline
- Exposure: East,North,South,West facing
- Fireplace: 1 fireplace
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Nov 10, 2026 | $8,950,000 | - |
| Currently | Nov 10, 2026 | $8,950,000 | - |
Description
A Full-Floor Prewar Sanctuary Off Fifth Avenue: Step directly from a keyed elevator into this full-floor residence in a white-glove co-op with only fourteen residences. Located steps from Central Park, this home marries the grand architectural scale of 1929 with the updates of modern living. Apartment 7 offers privacy, views, and many original details still remain, such as original herringbone floors, mahogany doors, dentil moldings, three wood-burning fireplaces and 10 ft ceilings. There are 4 bedrooms, an eat-in kitchen, a staff room, and a full laundry room. The Entertaining Areas: A private elevator landing leads you into a large central gallery, with the living room, dining room, and den/library each just steps away. The living room is bathed in southern light through four oversized picture windows and offers a quintessential NYC view, over the historic mansions of 79th Street, the 57th Street skyline in the distance, and a beautiful outlook of Central Park to the west. The southern facing den/library has beautiful custom bookshelves and another wood-burning fireplace. Curved mahogany pocket doors, separate this room from the living room. The formal dining room, crowned by a graceful coved ceiling, is large enough to seat 12 and has windows facing west and north. It leads into a large, windowed eat-in kitchen with a separate breakfast nook. The Sleeping Chambers: Cleverly separated from the public spaces via a discrete gallery corridor is the bedroom wing. The primary suite faces south and is bathed in sunlight, with yet another, wood-burning fireplace. A windowed marble bathroom features a steam shower and a deep soaking tub. Down the hall are two additional bedrooms, each with an ensuite bath and ample closets, along with a fourth bedroom with a nearby bath. At the end of the hall, there's a full laundry room equipped with a sink and extra storage, along with a staff room and its own bath. Building Details: Two private storage units transfer with the sale. The co-op permits 50% financing, and a 2% flip tax is payable by the purchaser.
Features & Amenities
Interior Features
Building Amenities
Building Information
Financial Details
About Upper East Side
View All Upper East Side ListingsThe 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 NeighborhoodActive Listings
308
Median Asking Price
$1.72M
Median $/Sqft
$1,443
Avg Days on Market
N/A
New This Week
14
Price Reduced
36%
Sold (30 Days)
48
Median Sale Price
$1.75M
Live data from RLS at REBNY • Updated 11/10/26, 3:45 PM EST
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Location
21 E 79th Street #7, Upper East Side, New York County
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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 monthly maintenance are $13,802 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $0, or roughly $0 per month. Verify the current assessment with your attorney before closing.
This property has 4 bedrooms and 4 full bathrooms and 1 half bathroom.
According to MLS records, the building was constructed in 1930, making it approximately 96 years old.
This listing is a co-op (stock cooperative). Buyers purchase shares in a corporation rather than real property, and the board must approve all sales.
Pets are permitted at this property. Contact Milton Coste for weight limits or breed restrictions.
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 - Lauren Cohen Starr
Listing Contact: (917) 319-9802
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.
How working with a buyer's agent works: I work for you, not the seller. Before I show you anything, New York brokerage rules ask us to put that in writing: an agreement and a disclosure that say I work for you and negotiate on your behalf. The agreement is non-exclusive: you can work with other agents, it runs for a short fixed term we agree on, and you can end it with a note. You may attend open houses independently without an agreement. Read how it works
RLS Data display by Keller Williams NYC. Data last updated on 11/10/2026 at 8:45 PM UTC
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Sale history, taxes, violations and comps for this unit
Before you bid
Pre-Offer Report: 21 E 79th Street #7
At $8,950,000, the listing leaves out what decides the offer: the recorded sale history, the tax and abatement picture, open building violations and permits, and the closed sales that set the price. Milton prepares the report from public records. No obligation.
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What happens next
- 1Milton emails you today.
- 2A short call about what you want and when.
- 3The agreement arrives electronically after the call. Then showings.
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You're contacting Milton Coste, a buyer's agent. Before any private showing, New York brokerage rules require a short non-exclusive agreement. Milton walks you through it before you sign anything. Broker commissions are not set by law and are fully negotiable. How working together works.
Upper East Side Market Update
48 sales last 30 days · $1.72M median · 6.4 months supply
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Quick Facts
Monthly Costs Estimate
$1,790,000
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 $5M to $9,999,999 at 2.25%, applied to the whole purchase price. It is due in cash at closing and cannot be financed.
Estimated mansion tax at asking
$201,375
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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