24 East 21st Street, Unit PH

Infinity Flats
Flatiron

$6,995,000
Price
4
Beds
4,109 Sq. Ft.
$1,702 / Sq. Ft.
4,109
Sq. Ft.
$1,702
per Sq. Ft.
Open: 12/6 12:00PM - 03:00PM - By Appt
Open: 12/6 12:00PM - 03:00PM - By Appt

Description

Located in the heart of the Flatiron district - on 21st Street between Broadway and Park Avenue South - moments from both Madison Square Park and Union Square Park and surrounded by the most esteemed dining in the city, this extraordinary mint condition 4100+ SF Penthouse is a rare combination of space, light, dramatic views, and flawless design. The Penthouse at 24 East 21, a discreet 8 unit boutique condo with virtual doorman, is a fabulous full floor, triple mint 4 bedroom/4.5...Located in the heart of the Flatiron district - on 21st Street between Broadway and Park Avenue South - moments from both Madison Square Park and Union Square Park and surrounded by the most esteemed dining in the city, this extraordinary mint condition 4100+ SF Penthouse is a rare combination of space, light, dramatic views, and flawless design. The Penthouse at 24 East 21, a discreet 8 unit boutique condo with virtual doorman, is a fabulous full floor, triple mint 4 bedroom/4.5 bath stunning, one of a kind home featuring a huge private outdoor oasis with dramatic open city views. Upon entering the Penthouse from the private keyed elevator you are greeted by an expansive 40+ foot long living/dining room flooded with light from striking skylights and north and south-facing windows with dramatic architectural views; it showcases a working gas fireplace with a 12 foot high feature wall visible as soon as one arrives from the private elevator, 15 foot ceilings, walnut-stained wide plank solid white oak floors, and a Juliet balcony. It feels more like the great room of a Hamptons house than a New York apartment.  The brand new oversized windowed eat-in kitchen features a large center island, snow quartz counter tops, floor-to-ceiling white Bilotta cabinets, and a large walk-in pantry. Top of the line appliances include a Sub-Zero side-by-side refrigerator/freezer, a Viking Professional 6 burner stove with a hood that vents out, and both Fisher Paykel and Bosch dishwashers. Directly adjacent to the kitchen is a home office/staff room that contains a full bathroom and is an ideal home gym or sauna A stone paved powder room ideally located for guest access completes the public wing of this truly spectacular home. The private domain of this vast home is reached by a breathtaking gallery with 12 foot high, exceptionally bright, floor to ceiling glass panes, peaked by an expanse of soaring skylights. The great hall leads to the private wing where you first encounter an enormous media/family lounge, the much coveted and impossible to find additional gathering place for movie nights, cocktails for guests in the fully stocked bar, or a massive home office or boardroom that is truly the height of elegance and style. To the south is the immense and opulent primary bedroom domain, sun-flooded from soaring ceilings and expansive skylights that perfectly frame stunning panoramas of spires, architecture and sky. This decadently large oversized suite is whisper quiet and features a southern-facing bank of windows with electric blinds, custom walk-in closet, second fitted closet, and a luxurious en-suite marble bathroom with a double vanity, deep soaking tub, and a separate walk-in shower. There are two additional queen sized bedrooms - both of ample proportions - with one containing an en-suite windowed bath. Finally, off the gallery, there is a full bathroom with a Miele washer and potentially vented dryer that serves the third bedroom; both bedrooms offer generous custom closets. This grand apartment has three zone central air conditioning and private elevator access from two key locked elevators. Pristinely painted, finished and maintained to the highest standard. The piece-de-resistance is the private outdoor oasis. Over 700 square feet of private, landscaped, irrigated terracing - 25" wide by 47" long - with a three season cabana for luxurious lounging, and decked in exotic weather-proof solid hardwood that requires no maintenance and begs for grand-scale entertaining, equally inviting for intimate gatherings, with glorious views of the Met Life Tower and the Empire State Building. It is the ideal quiet refuge - insulated from the sounds of the city - and you will feel as if you're on vacation without ever having to leave the city. Infinity Flats, a boutique pet-friendly building containing 8 full-floor apartments, and features private key-lock elevators, a 24 hour virtual doorman for guest and delivery access, and secure lobby lockers for all of your valuable packages. Perfectly located in the heart of the vibrant Flatiron district, Gramercy, Madison Square and Union Square at your doorstep with world class restaurants and shopping at your feet, on a distinguished residential and elegant block, this is an opportunity to enjoy a grand New York City lifestyle: truly a private home in the heart of the city and the epitome of luxurious indoor/outdoor living. Look no more! Please note: taxes listed are for a primary resident with the STAR rebate.
  1. Listed by Michael S Lubin • Brown Harris Stevens Residential Sales LLC
    P: (212)-317-3672 C: (212)-317-3672 mlubin@bhsusa.com
  2. Listed by Dean E Dunbar • Brown Harris Stevens Residential Sales LLC
    P: (973)-454-6990 C: (973)-454-6990 ddunbar@bhsusa.com

Property Details for 24 East 21st Street, Unit PH

View
City, Skyline

Open Houses

Saturday, Dec 6th

12:00 PM - 3:00 PM

By Appointment Only

Sunday, Dec 7th

12:00 PM - 3:00 PM

By Appointment Only

LISTING UPDATED: 12/04/2025 04:39 PM

Property Details for 24 East 21st Street, Unit PH

StatusActive
MLS IDRLS20050236
Days on Market74
Taxes$7,885 / month
Common Charges$3,691 / month
Min. Down Pymt10%
Total Rooms7.0
Compass TypeCondo
MLS TypeCondo
Year Built1935
CountyNew York County

Building

Infinity Flats

8 Units9 StoriesBuilt in 1935

Location

Listing Courtesy of Brown Harris Stevens Residential Sales LLC
Add your commute

Building Information for 24 East 21st Street, Unit PH

Building/ComplexInfinity FlatsFloor9Stories9Residences8Pet Policy-Pet Policy Details-Year Built1935Building AgePre-war

Payment Calculator

$50,461 per month

30 year fixed, 6.28% Interest

Principal and Interest

$38,885

Property Taxes

$7,885

Maintenance/Common Charges

$3,691

The Payment Calculator is for illustrative purposes only.

Property Information for 24 East 21st Street, Unit PH

Summary
Location and General Information
  • Subdivision Name: Flatiron
  • Stories Total: 9
  • Exposures: East, West, North, South
  • Garage Spaces: 0.0
  • View: Yes
  • Zoning Description: M1-5M
Taxes and HOA
  • Tax Lot: 0123
  • Tax Deduction Percent: .00%
  • Tax Block: 00849
  • Association Fee Frequency: Monthly
  • Flip Tax: $0
  • Building Tax Lot: 7506
  • Tax Monthly Amount: 7885.0
  • Tax Abatement YN: false
Parking
  • Garage: No
  • Garage Spaces Assigned YN: false
Property
Lot Information
  • Living Area: 4109.0
  • Living Area Units: SquareFeet
  • Building Name: Infinity Flats
Building Information
  • Building Features: Elevators
  • Landmark Status YN: false
  • Building Laundry Features: None
  • Building Pets Allowed: BuildingYes
  • Capital Reserves YN: false
  • Green Building YN: false
Property and Assessments
  • New Development: No
  • Sponsor Unit: No
  • Certificate Of Occupancy: Yes
  • Percent Of Common Elements: .00%
  • Common Interest: Condominium
  • Number Of Shares: 0
  • New Construction: No
  • Structure Type: Loft
  • Property Condition: Excellent
Interior and Exterior Features
Exterior Features
  • Basement: Other
  • Exterior Features: None
  • Patio And Porch Features: Terrace
Interior Features
  • Cooling: Zoned
  • Entry Level: 9
  • Fireplace Features: Gas
  • Fireplaces Total: 1
  • Fireplace: Yes
  • Dining Type: Alcove
  • Kitchen Condition: Excellent
  • Floor Number: 9
  • Basement: No
  • Cooling: Yes
  • Bathroom Condition: Excellent
  • ElevatorsTotal: 2
Multi Family
Multi-Family Information
  • Unit Line: PH
  • Number Of Units Total: 8
Rental
Rental Information
  • Pets Allowed: UnitNo
  • Attendance Type: None
  • Land Lease: No

Property History for 24 East 21st Street, Unit PH

DateEvent & SourcePriceAppreciationLink
Sep 22, 2025

Listed (Active)

RLS RESO #RLS20050236

$6,995,000—
Jun 20, 2025

Permanently Off Market

RLS RESO #RLS11009788

$7,500,000——
Sep 17, 2024

Listed (Active)

RLS RESO #RLS11009788

$7,750,000—
Mar 15, 2024

Temporarily Off Market

RLS RESO #RLS10940509

$7,500,000——
Apr 3, 2023

Listed (Active)

RLS RESO #RLS10940509

$7,500,000——
Feb 20, 2023

Permanently Off Market

RLS RESO #RLS10827754

$7,500,000—
Sep 23, 2022

Listed (Active)

RLS RESO #RLS10827754

$7,998,000—
Jun 13, 2022

Temporarily Off Market

RLS RESO #RLS10778553

$7,750,000—
Oct 4, 2021

Listed (Active)

RLS RESO #RLS10778553

$8,000,000—
Jul 3, 2012

Sold

RealPlus #6b81c8a5e1904eb933ed1139c2b59e38bd43b966

$6,000,000——
Jul 3, 2012

Sold (Public Record)

ACRIS #2012070501031002

$6,000,000

-0.4% / yr

Apr 28, 2012

Contract Signed

RealPlus #6b81c8a5e1904eb933ed1139c2b59e38bd43b966

$6,250,000——
Feb 27, 2012

Listed (Active)

RealPlus #6b81c8a5e1904eb933ed1139c2b59e38bd43b966

$6,250,000——
Aug 23, 2007

Sold

RealPlus #43c2f28cdb8addfa248b45bfc130018711bb7237

$6,109,500——
Aug 23, 2007

Sold (Public Record)

ACRIS #2007082901620001

$6,109,500—
Nov 23, 2006

Contract Signed

RealPlus #43c2f28cdb8addfa248b45bfc130018711bb7237

$6,500,000——
Nov 2, 2006

Listed (Active)

RealPlus #43c2f28cdb8addfa248b45bfc130018711bb7237

$6,500,000——
DateEvent & SourcePrice
09/22/2025

Listed (Active)

RLS RESO #RLS20050236

$6,995,000
06/20/2025

Permanently Off Market

RLS RESO #RLS11009788

$7,500,000
09/17/2024

Listed (Active)

RLS RESO #RLS11009788

$7,750,000
03/15/2024

Temporarily Off Market

RLS RESO #RLS10940509

$7,500,000
04/03/2023

Listed (Active)

RLS RESO #RLS10940509

$7,500,000
02/20/2023

Permanently Off Market

RLS RESO #RLS10827754

$7,500,000
09/23/2022

Listed (Active)

RLS RESO #RLS10827754

$7,998,000
06/13/2022

Temporarily Off Market

RLS RESO #RLS10778553

$7,750,000
10/04/2021

Listed (Active)

RLS RESO #RLS10778553

$8,000,000
07/03/2012

Sold

RealPlus #6b81c8a5e1904eb933ed1139c2b59e38bd43b966

$6,000,000
07/03/2012

Sold (Public Record)

ACRIS #2012070501031002

$6,000,000

-0.4% / yr

04/28/2012

Contract Signed

RealPlus #6b81c8a5e1904eb933ed1139c2b59e38bd43b966

$6,250,000
02/27/2012

Listed (Active)

RealPlus #6b81c8a5e1904eb933ed1139c2b59e38bd43b966

$6,250,000
08/23/2007

Sold

RealPlus #43c2f28cdb8addfa248b45bfc130018711bb7237

$6,109,500
08/23/2007

Sold (Public Record)

ACRIS #2007082901620001

$6,109,500
11/23/2006

Contract Signed

RealPlus #43c2f28cdb8addfa248b45bfc130018711bb7237

$6,500,000
11/02/2006

Listed (Active)

RealPlus #43c2f28cdb8addfa248b45bfc130018711bb7237

$6,500,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 24 East 21st Street, Unit PH

Taxable ValueLand$87,725Additions$1,666,744Total$1,754,469
Tax Record2025$106,193 ($8,849 / month) Tax Class2CTax Rate12.5%
Home Facts
Total Finished SqFt4,109 SqFtLot Size0 SqFtYear Built1935ZoningM15MAPN1008491509

Schools near 24 East 21st Street, Unit PH

This home is within New York City Geographic District # 2.
Rating
School
Type
Grades
Distance
Sixth Avenue Elementary School
Public - PK to 5
Jhs 104 Simon Baruch
Public - 6 to 8
Nyc Lab Ms For Collaborative Studies
Public - 6 to 8
Lower Manhattan Community Middle School
Public - 6 to 8
Rating
School
Distance
Sixth Avenue Elementary School
PublicPK to 5

Jhs 104 Simon Baruch
Public6 to 8

Nyc Lab Ms For Collaborative Studies
Public6 to 8

Lower Manhattan Community Middle School
Public6 to 8

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 24 East 21st Street, Unit PH, Flatiron

24 East 21st Street, Unit PH is a condo for sale in Flatiron. This property was listed for sale on September 22, 2025 by Brown Harris Stevens Residential Sales LLC, it's currently listed at $6,995,000. It has been on the market for a total of 74 days and was last sold on July 3, 2012. This listing's school district is New York City Geographic District # 2. Nearby schools include Sixth Avenue Elementary School, Jhs 104 Simon Baruch and Nyc Lab Ms For Collaborative Studies. 24 East 21st Street, Unit PH is a 4-bed, 5-bath, 4,109 sqft condo built in 1935.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of Brown Harris Stevens Residential Sales LLC

This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2025 The Real Estate Board of New York, Inc., All rights reserved. The source of the displayed data is either the property owner or public record provided by non-governmental third parties. It is believed to be reliable but not guaranteed. This information is provided exclusively for consumers’ personal, non-commercial use. The data relating to real estate for sale on this website comes in part from the IDX Program of OneKey® MLS. Information Copyright 2025, OneKey® MLS. All data is deemed reliable but is not guaranteed accurate by Compass. See Terms of Service for additional restrictions. Compass · Tel: 212-913-9058 · New York, NY 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. ©2025 The Real Estate Board of New York, Inc., all rights reserved. This information is not guaranteed, should be independently verified and may not reflect all real estate activity in the market. Offers of compensation set forth here are for other RLSParticipants only and may not reflect other agreements between a consumer and their broker.©2025 The Real Estate Board of New York, Inc., All rights reserved.