---
title: "4 WEST 21ST STREET Condos for Sale in Manhattan | Buyer Savings"
description: "View active listings, prices, and amenities at 4 WEST 21ST STREET, located at 4 West 21st Street, New York, NY 10010 in Manhattan. Buy a condo with Buyer Advantage savings."
url: "https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/4-west-21st-street"
source: "Real Estate Rebate Team"
dateModified: "2026-09-10T09:01:35.911Z"
---

# 4 WEST 21ST STREET

4 West 21st Street, New York, NY 10010

Union Square · Condop · Built 2006

Availability last updated: September 10, 2026, 5:01 AM

## At a Glance

- **Active Units**: 1 Unit
- **Starting Price**: $1,200,000
- **Property Type**: Condop
- **Year Built**: 2006

## Building Overview

About 4 West 21st Street

4 West 21st Street is a premier residential building located in the Flatiron District, just steps from Fifth Avenue. This full-service condominium offers residents a central location near Madison Square Park and Union Square. It is central living in Flatiron.

## Illustrative Buyer Savings

**$18,000 at Closing**

Illustrative, based on a 3% buyer-broker commission on the highest-priced available residence. Régis shares 50% of the buyer-side commission actually received, so your figure follows the commission offered on your transaction.

Work with Régis before touring or submitting an offer to understand the building, evaluate pricing, and preserve eligible Buyer Advantage opportunities.

**Régis Roumila** — Principal Broker · NY & NJ. Private buyer representation for luxury resale and new development purchases. Verified Member: REBNY · NAR. NYDOS LIC#: 10491211335.

[Speak with Régis](mailto:info@real-estate-rebate.com?subject=Inquiry%3A%204%20WEST%2021ST%20STREET) · [Estimate your Buyer Commission Share](https://realestaterebatesnewyork.com/calculators/buyer-closing-cost-calculator)

## Key Building Details

- **Year Built**: 2006
- **Stories / Floors**: 17
- **Neighborhood**: Union Square
- **Active Listings**: 1 unit

## Building Amenities

- Central Air
- Central
- Building Washer Dryer Install Allowed
- Common On Floor
- Common Area
- In Unit
- Garage
- High Ceilings
- Recessed Lighting
- Soaking Tub
- Walk-In Closet(s)
- Dishwasher
- Range
- Refrigerator
- Pets: Building Yes
- Pets: Cats OK
- Pets: Dogs OK

## Active Residence at 4 WEST 21ST STREET

1 Active Residence

Buyer Advantage figures shown on these residences are illustrative, based on a 3% buyer-broker commission. Régis shares 50% of the buyer-side commission actually received on the transaction, so the figure follows the commission offered on the listing you buy. [How the Buyer Commission Share works](https://realestaterebatesnewyork.com/buyer-advantage)

| Residence | Type | Beds | Baths | Size | Price | Status | Estimated Buyer Advantage | Courtesy of |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [4 WEST 21ST STREET #14A](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10010/4-west-21st-street-14a-ny-10010) | Condop | 2 | 2 | 1,225 ft² | $1,200,000 | Active | $18,000* | Compass |

> This 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.

## Sales History for 4 WEST 21ST STREET

64 closings in this building. Prices are the consideration recorded on the deed with the City of New York wherever it has been filed.

| Unit # | Beds | Baths | Size | Closing Price | Price / Ft² | Asking Price | Sold On |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 16A | 2 | 2 | 1,444 | $1,550,000 (-5.8%) — Public record | $1,073 | $1,645,000 | Mar 18, 2026 |
| 10D | 2 | 2.5 | 1,518 | $1,185,000 (-12.2%) — Public record | $781 | $1,350,000 | Oct 30, 2025 |
| 2D | 2 | 2.5 | 1,620 | $1,435,000 (-8.9%) — Public record | $886 | $1,575,000 | Sep 17, 2025 |
| 8D | 2 | 3 | 1,495 | $1,225,000 — Public record | $819 | — | Sep 4, 2025 |
| 14D | 2 | 2.5 | 1,518 | $1,350,000 (-1.8%) — Public record | $889 | $1,375,000 | May 5, 2025 |
| 4-D | 2 | 2.5 | 1,495 | $1,300,000 (-6.8%) — Public record | $870 | $1,395,000 | Jul 15, 2024 |
| 11B | 3 | 3 | 1,674 | $1,450,000 (-17.1%) — Public record | $866 | $1,750,000 | Jun 28, 2024 |
| 4B | 2 | 3 | 1,500 | $1,169,561 — Public record | $780 | — | Jun 27, 2024 |
| 7C | 2 | 2 | 1,256 | $1,295,000 — Public record | $1,031 | $1,295,000 | May 30, 2024 |

Showing the 9 most recent of 64 closings. The full record is on the building page.

Public record marks a price taken from the deed filed with the City of New York. Rows without it show the price reported to the listing service, which is what is available until the deed is recorded, typically about two weeks after closing.

The percentage beside a closing price is the sale measured against the original asking price. Rows with no asking price are sales with no listing behind them. Those are sponsor and off-market transfers taken from the public record.

> This 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.

## Property Tax History

Property taxes for the co-op corporation at 4 WEST 21ST STREET were $2,190,136 in 2026, up 1.7% from 2025.

These figures are for the entire building across all 54 apartments, not for this apartment. A co-op is a single tax lot: the corporation pays one property tax bill and recovers it through shareholders’ monthly maintenance. There is no separate tax bill for an individual unit.

| Year | Tax Assessment | Land | Additions | Billable Value | Property Tax | Tax Rate |
| --- | --- | --- | --- | --- | --- | --- |
| 2026 (FY 2026/27) | $18,077,400 | $900,000 | $17,177,400 | $17,523,380 | $2,190,136 | 12.5% (estimated) |
| 2025 (FY 2025/26) | $19,290,600 | $900,000 | $18,390,600 | $17,224,310 | $2,152,501 | 12.5% (estimated) |
| 2024 (FY 2024/25) | $17,777,250 | $900,000 | $16,877,250 | $16,702,760 | $2,087,265 | 12.5% |
| 2023 (FY 2023/24) | $19,393,650 | $900,000 | $18,493,650 | $17,258,670 | $1,775,253 after $381,846 abatement | 12.502% |
| 2022 (FY 2022/23) | $18,910,350 | $900,000 | $18,010,350 | $16,143,540 | $1,268,925 after $710,817 abatement | 12.267% |
| 2021 (FY 2021/22) | $15,068,700 | $900,000 | $14,168,700 | $15,010,270 | $1,139,400 after $696,204 abatement | 12.235% |
| 2020 (FY 2020/21) | $16,682,850 | $900,000 | $15,782,850 | $15,068,950 | $1,847,629 | 12.267% |
| 2019 (FY 2019/20) | $16,237,800 | $900,000 | $15,337,800 | $14,192,380 | $1,769,344 | 12.473% |
| 2018 (FY 2018/19) | $15,737,400 | $900,000 | $14,837,400 | $14,128,680 | $1,780,546 | 12.612% |
| 2017 (FY 2017/18) | $15,876,000 | $900,000 | $14,976,000 | $13,251,200 | $1,681,143 | 12.719% |
| 2016 (FY 2016/17) | $15,362,100 | $900,000 | $14,462,100 | $12,346,000 | $1,291,664 | 12.892% |
| 2015 (FY 2015/16) | $13,729,500 | $900,000 | $12,829,500 | $11,668,480 | $1,220,731 | 12.883% |
| 2014 (FY 2014/15) | $11,367,900 | $900,000 | $10,467,900 | $10,956,980 | $880,871 | 12.855% |
| 2013 (FY 2013/14) | $13,431,600 | $900,000 | $12,531,600 | $11,088,720 | $911,214 | 13.145% |
| 2012 (FY 2012/13) | $12,009,150 | $900,000 | $11,109,150 | $10,719,230 | $619,941 | 13.181% |
| 2011 (FY 2011/12) | $10,917,450 | $900,000 | $10,017,450 | $11,253,890 | $661,022 | 13.433% |
| 2010 (FY 2010/11) | $11,070,000 | $900,000 | $10,170,000 | $12,112,000 | $399,183 | 13.353% |

The City has not published the official FY2026/27 and FY2025/26 tax rates yet. We calculated the tax for those years using the prior year’s rate, so treat them as an estimate rather than a figure the City has adopted. Every rate without the Estimated marker is the published one.

Tax Assessment is the assessed value on the City’s roll, and it is the figure other listing sites publish. It is not what the bill is calculated on. New York phases assessment changes in gradually for some tax classes, so the City bills the Billable Value shown beside it, less any exemption the owner holds. It usually trails the assessment, and it can sit above it for a few years after an assessment falls.

Where an abatement applies, Property Tax is the amount owed after it. Abatements are granted to the property and do not necessarily transfer to a new owner.

Figures are the New York City Department of Finance assessment roll for tax lot 1008220045. Assessed and billable values are determined by the City for tax purposes and are not an appraisal or an estimate of market value. Tax classes and rates are set annually and can change.

[How we source and calculate NYC property tax data](https://realestaterebatesnewyork.com/nyc-property-tax-data-methodology)

## What to Review Before Buying in 4 WEST 21ST STREET

Purchasing real estate in New York City or New Jersey goes beyond the apartment itself. To secure your asset and investment equity, we systematically analyze building structures, financials, board packages, and commission sharing arrangements.

1. **Building Quality** — Review construction, finishes, amenities, management, service level, and long-term resale value.
2. **Monthly Costs** — Understand common charges, property taxes, assessments, and the full carrying-cost picture.
3. **Transaction Strategy** — Evaluate pricing, sponsor terms, closing costs, negotiation leverage, and eligible Buyer Advantage opportunities before committing.

## Location & Neighborhood

4 West 21st Street, New York, NY 10010

### Union Square

Union Square is the dynamic crossroads of downtown Manhattan, where the East Village, Chelsea, Flatiron, and Gramercy Park meet. Centered around the historic park, it is a hub of culture, protest, and commerce. For those seeking Union Square Manhattan real estate, the location offers absolutely unparallelled access to the city. Living in Union Square, Manhattan is energetic. It is a neighborhood that never really sleeps but offers a deep sense of place thanks to its famous Greenmarket. As a central Manhattan NYC neighborhood, it attracts a mix of students, tech workers, and artists who want to be in the the thick of it all. The homes for sale in Union Square are often high-end. One Union Square South and the Zeckendorf Towers are iconic buildings that define the residential landscape. You will find luxury condos with extensive amenities, as well as loft-style apartments in the surrounding streets. Because of its central location, prices remain high and stable. It is a prime market for investors and those who prioritize transit convenience above all else. The rental market is also robust, fueled by NYU students and young professionals. The lifestyle in Union Square is centered on the park. The Union Square Greenmarket is the city's flagship farmers market, drawing chefs and locals four days a week. It creates a village feel in the middle of the metropolis. The area is crowded but vibrant. Street performers, chess players, and activists share the space. Residents have immediate access to a massive Whole Foods, a Trader Joe's, and endless dining options, making daily life incredibly convenient. Union Square boasts one of the best subway stations in the system: the 14th Street-Union Square complex (4, 5, 6, L, N, Q, R, W). You can get virtually anywhere in Manhattan or into Brooklyn without a transfer. The cross-town buses on 14th Street offer further connectivity. For residents, the entire city feels reachable in under 30 minutes. It is the gold standard for NYC accessibility. Union Square Park is the neighborhood's front yard, offering green space, a dog run, and a playground. It is a place of constant activity and observation. Washington Square Park and Madison Square Park are also short walks away. Amenities are unbeatable. From the Strand Bookstore to major movie theaters and gyms, everything is here. The healthcare options are also excellent, with Mount Sinai Union Square nearby. Union Square is best for people who want maximum convenience and energy. It is ideal for foodies (thanks to the Greenmarket), students, and commuters who want the ultimate transit hub.

- [Union Square Guide](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/union-square)
- [Browse Union Square Residences](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/union-square-manhattan)
- [All Neighborhoods](https://realestaterebatesnewyork.com/neighborhoods)

## Frequently Asked Questions

### Where is this building located?

4 West 21st Street is in the Flatiron District.

### What subway is accessible?

The F, M, N, R, and W trains at 23rd Street are nearby.

### Is there a park nearby?

Madison Square Park is just two blocks away.

### What is the neighborhood vibe?

It offers a bustling, architectural, and centrally located vibe.

Have questions about 4 WEST 21ST STREET? [Speak with Régis before you tour.](mailto:info@real-estate-rebate.com)

## Considering a Residence at 4 WEST 21ST STREET?

Speak with Régis before you tour, negotiate, or submit an offer. Receive private buyer-side guidance, pricing context, and eligible Buyer Advantage opportunities where available.

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