For Sale · Listing by Compass
39 W 23rd Street #PH21
Flatiron, Manhattan
$9,999,000
39 W 23rd Street #PH21
MLS® #RLS20116093
Listing by Compass
- 4
- Bedrooms
- 4
- Baths
- 3,194
- Sq. Ft.
- 2022
- Year Built
Quick Summary
Property Highlights
- Climate Control: Central Air
- Parking: Private garage
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Sep 18, 2026 | $9,999,000 | - |
| Currently | Sep 18, 2026 | $9,999,000 | - |
Description
This exceptional full-floor residence at Flatiron House offers 3,194 square feet of refined interiors and 222 square feet of irrigated loggias for greenery. A private elevator opens to a gracious gallery and a dramatic corner living and dining room surrounded by floor-to-ceiling windows and sweeping skyline views. The windowed kitchen features custom oak and ribbed-glass cabinetry, Calacatta Lincoln marble, brass detailing, premium appliances, a generous island and pantry. Four bedrooms include a serene corner primary suite with a custom dressing room, walk-in closet and spa bathroom with heated marble floors and a six-foot soaking tub. Additional features include automated shades, bespoke millwork, central climate control, abundant storage and a dedicated laundry room with vented dryer. Flatiron House offers a doorman, concierge, fitness center, residents' lounge and landscaped gardens moments from Madison Square Park. The building also has a second, discreet entrance on quiet West 24th Street. Some photographs have been virtually staged.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Building Information
Financial Details
About Flatiron
View All Flatiron ListingsThe Flatiron District is a busy intersection of history, technology, and luxury living. Named after the iconic Flatiron Building, the neighborhood is centered around Madison Square Park and is a hub for the city's 'Silicon Alley.' The real estate market is famous for its grand cast-iron loft buildings with high ceilings and expansive floor plans, alongside ultra-luxury glass towers that offer modern amenities and central Manhattan convenience.
Flatiron Live Market Data
View NeighborhoodActive Listings
108
Median Asking Price
$2.55M
Median $/Sqft
$1,782
Avg Days on Market
N/A
New This Week
15
Price Reduced
22%
Sold (30 Days)
22
Median Sale Price
$2.00M
Live data from RLS at REBNY • Updated 9/18/26, 7:56 PM EST
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Location
39 W 23rd Street #PH21, Flatiron, 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 $5,944 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $82,140, or roughly $6,845 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 3,194 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 2022, making it approximately 4 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.
Pets are permitted at this property. Contact Milton Coste for weight limits or breed restrictions.
At the current list price of $9,999,000 for 3,194 sq ft, the asking price per square foot is approximately $3,131. 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 milton@miltoncoste.com. 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 - Carl Gambino
Listing Contact: (646) 465-1766
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 9/18/2026 at 11:56 PM UTC
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Quick Facts
Monthly Costs Estimate
$1,999,800
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
$224,978
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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