Milton Coste

Licensed Real Estate Associate Broker

(917) 416-7433
24 E 21st Street #PH
3D Tour
Active For Sale Condo

$6,995,000

$1,702 per sq ft

24 E 21st Street #PH

Flatiron, Manhattan

MLS® #RLS20070048

RLS at REBNY

Listing by Compass

4

Bedrooms

5.5

Baths

4,109

Sq. Ft.

1935

Year Built

Quick Summary

Bedrooms 4
Bathrooms 5 full, 1 half
Living Area 4,109 sq ft
Year Built 1935
Ownership Condo
HOA/Common Charges $4,467/mo
Property Taxes $88,272/yr
Neighborhood Flatiron
Floor 1 of 9

Property Highlights

  • Exposure: North,South,West facing
  • Outdoor Space: Terrace, Rooftop
  • Fireplace: 1 fireplace

Property Details

Type Condo
Ownership Condominium
Total Rooms 8
Baths 4 Full, 1 Half
Floor 1 of 9
Exposure North,South,West
Cooling Central Air
Pets Yes
Year Built 1935
Living Area 4,109 sq ft
Structure Type MixedUse
Flooring Hardwood
Furnished Unfurnished
Block/Lot 00849/7506

Description

850+ SQFT PRIVATE TERRACE Welcome to the Penthouse at 24 East 21st Street, a private oasis with 4 Beds and 4.5 Baths in prime Flatiron. Stepping off the keyed elevator you are immediately greeted by the expanse of the 18+ foot ceiling, sunny skylights and endless living space. The floor-through, 40 foot long, great room provides a grand setting for both relaxing and entertaining, enhanced by sunny southern and northern views. The newly renovated, eat-in, kitchen is a chef's dream, featuring quartz countertops, Bilotta cabinetry, and top of the line appliances including a Sub Zero refrigerator, Viking range, and two dishwashers - a space that is as functional as it is beautiful. Ascend up the glass encased stairs to enter the large private terrace above. With over 850 sqft, beautifully landscaped, and a three season cabana, this terrace is the perfect private getaway and excellent for entertaining. A breathtaking glass enclosed gallery leads to the private wing, anchored by an expansive media and family lounge with a full bar - an exceptional bonus space ideal for entertaining, work, or relaxation. The south-facing primary suite is a serene retreat featuring dramatic ceiling height, electric shades, large walk-in closet, and a luxurious marble bath with double vanity, soaking tub, and separate shower. Two additional generously proportioned bedrooms offer custom closets, with one en-suite bath and a separate full bathroom off the gallery that also houses a Miele washer and dryer. On either side of the entry foyer there is a powder room for entertaining guests and an additional staff room outfitted for storage with a wine fridge and an en-suite bath. Other features of this apartment are central AC with three zones, hardwood flooring throughout, gas fireplace and a juliet balcony. Located just off Park Avenue South, 24 East 21st Street sits at the crossroads of Flatiron, Gramercy, and NoMad - surrounded by acclaimed restaurants, Madison Square Park, premier fitness studios, and convenient transportation. The building consists of eight full floor residences with two private keyed elevators. There are also keyed storage lockers in the lobby. This penthouse presents a rare opportunity to own a truly special residence in one of Manhattan’s most vibrant and enduring neighborhoods.

Features & Amenities

Interior Features

Built In Features Eat In Kitchen High Ceilings Recessed Lighting Walk In Closets In Unit See Remarks Flooring: Hardwood Double Pane Windows Skylights Fireplace (1)

Exterior Features

Private Entrance Private Outdoor Space Over60 Sqft Terrace Rooftop

Building Amenities

Elevators

Building Information

Total Units 8
Stories 9
Structure MixedUse

Financial Details

Common Charges $4,467/mo
RE Taxes $88,272/yr ($7,356/mo)

The Flatiron District is a vibrant 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 Neighborhood

Active Listings

112

Median Asking Price

$2.73M

Median $/Sqft

$1,790

Avg Days on Market

N/A

New This Week

11

Price Reduced

29%

Sold (30 Days)

6

Median Sale Price

$2.95M

Live data from RLS at REBNY • Updated 3/2/26, 12:38 PM EST

Similar Listings in Flatiron

View All

Location

Loading map...

24 E 21st Street #PH, Flatiron, New York County

Virtual Tour

MLS® ID: RLS20070048
First Listed: 2/3/2026
On Market: 3/2/2026
Contract Date: 1/14/2026

Listing Courtesy of Compass - Elizabeth W Sahlman

Listing Contact: (917) 523-8200

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.

RLS at REBNY

RLS Data display by Keller Williams NYC. Data last updated on 3/2/2026 at 5:38 PM UTC

Buying a Condo? Start Here

NYC Real Estate Market Report 2026

Data-driven analysis of prices, inventory, and trends across NYC.

Read article
Call WhatsApp
Call Milton WhatsApp