Under Contract – Backup offers may be accepted
Pending · Listing by Compass
29 W 21st Street #4
Flatiron, Manhattan
$3,245,000
29 W 21st Street #4
MLS® #RLS10946205
Listing by Compass
- 2
- Bedrooms
- 3
- Baths
- 2,082
- Sq. Ft.
- 1910
- Year Built
Quick Summary
Property Highlights
- Exposure: North,South facing
- Climate Control: Central Air
- Character: Pre-war building (1910)
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Jan 27, 2023 | $3,245,000 | - |
| Currently | Aug 21, 2026 | $3,245,000 | - |
Description
Iron Lofts is Flatiron’s newest boutique development with just 6 full-floor, classic condominium lofts in the neo-industrial heart of the Ladies’ Mile Historic District. Fully renovated and carved from a landmarked 1909 Renaissance Revival apparel building, this new portfolio of statement homes warmly embraces its history, punctuated by Scandinavian design principles of simplicity, function and textural blends. 2082 square feet of architectural perfection begin with a private key-lock elevator that leads to the gracious entry foyer and onward to a grandly-proportioned living area. Wide-planked floors of smoked oak stretch to oversized south-facing windows and continue paneling the walls beneath adjustable recessed cove lighting. An open kitchen offers top-of-the-line appliances from Miele and Sub-Zero and are tastefully incorporated into locally-milled cabinetry. Spacious bedrooms including a lavish primary suite, each include serene en-suite baths and generous closet space outfitted with custom millwork. A third full bathroom accommodates guests, attired in penny tile, granite, and glass. Additionally, a perfectly proportioned home office, den or media suite offers separation and privacy. All homes include private laundry rooms with sink and linen storage. Central air conditioning. Oversized new windows. 24-hour remote monitoring and secure package delivery is coordinated via virtual lobby attendant, offering convenience and security with the utmost of discretion. Moments from Fifth Avenue shopping, transit, and Madison Square Park. A special and rare offering of timeless elegance. The Complete Offering Terms are available in an offering plan available from Sponsor. File no. CD-210292. Equal Housing Opportunity.
Features & Amenities
Interior Features
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
85
Median Asking Price
$2.40M
Median $/Sqft
$1,839
Avg Days on Market
N/A
New This Week
1
Price Reduced
35%
Sold (30 Days)
15
Median Sale Price
$2.49M
Live data from RLS at REBNY • Updated 8/20/26, 10:53 PM EST
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Location
29 W 21st Street #4, 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 $2,236 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $34,488, or roughly $2,874 per month. Verify the current assessment with your attorney before closing.
This property has 2 bedrooms and 3 full bathrooms.
The listed interior living area is 2,082 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1910, making it approximately 116 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 $3,245,000 for 2,082 sq ft, the asking price per square foot is approximately $1,559. 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 - BRIAN L BABST
Listing Contact: (646) 456-0034
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 8/21/2026 at 2:53 AM UTC
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Quick Facts
Monthly Costs Estimate
$649,000
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
$48,675
Estimate based on the asking price. Confirm your own obligation with your real estate attorney.
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