34 W 21ST Street
MLS® #RLS20059098
Listing by Douglas Elliman Real Estate
5
Bedrooms
6.5
Baths
8,000
Sq. Ft.
N/A
Year Built
Quick Summary
Property Highlights
- Views: Other
- Outdoor Space: Terrace
- Fireplace: 1 fireplace
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Nov 10, 2025 | $10,750,000 | - |
| Currently | May 4, 2026 | $10,750,000 | - |
Description
NEWLY CONSTRUCTED 7 STORY STEEL & CONCRETE BUILDING WITH ELEVATOR AND GARAGE IN FLATIRON
Introducing a Vanderploeg Team Exclusive at Douglas Elliman:
34 West 21st Street presents a rare opportunity to own a newly constructed 8,000 square foot turn-key 5 bedroom/5 bath one unit home, boutique office building or private members club in the heart of New York City. Designed by acclaimed architect Karl Fischer and interior designer Andres Escobar, this 7-story building represents a masterclass in modern architecture. Oversized windows, high-end finishes and soaring ceiling heights (including almost 16' on the parlor floor and 28' in the double height chef's kitchen) give the property a modern and open feel throughout. The private garage and commercial grade glass elevator provide easy access to and throughout the building. The large garden, roof terrace, and sauna provide a tranquil retreat in one of the liveliest neighborhoods in Manhattan. The C5-6 / R10A zoning is one of the most flexible in the city and permits nearly all commercial and residential uses.
The Flatiron district offers the best of New York City including world class dining, art institutions and historic architecture. Notable venues just moments away include 11 Madison Park, Eataly, and Madison Square Park. Reach out to us via email or phone to schedule an appointment.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Appliances
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
0
Median Asking Price
N/A
Median $/Sqft
N/A
Avg Days on Market
N/A
New This Week
0
Price Reduced
N/A
Sold (30 Days)
1
Median Sale Price
$2.48M
Live data from RLS at REBNY • Updated 5/4/26, 2:18 AM EST
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Location
34 W 21ST Street, 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 annual property tax is $118,548, or roughly $9,879 per month. Verify the current assessment with your attorney before closing.
This property has 5 bedrooms and 6 full bathrooms and 3 half bathrooms.
The listed interior living area is 8,000 square feet. Verify dimensions independently during due diligence.
This listing is None
Pets are permitted at this property. Contact the listing broker for weight limits or breed restrictions.
At the current list price of $10,750,000 for 8,000 sq ft, the asking price per square foot is approximately $1,344. 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 Douglas Elliman Real Estate - George W Vanderploeg
Listing Contact: (917) 301-0158
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 5/4/2026 at 6:18 AM UTC