---
title: "21-23 South William Street #4-E, New York City, NY 10004"
description: "21-23 South William Street #4-E, New York City, NY 10004 — Financial District, New York City, NY. Listing Price $835,000. 1 bed, 1 bath, 738 sqft Illustrative Buyer Commission Share of $12,525 at closing, based on a 3% buyer-broker commission."
url: "https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10004/21-23-south-william-street-4e-ny-10004"
source: "Real Estate Rebate Team"
dateModified: "2026-10-13T19:40:50.889Z"
status: "Active"
---

# 21-23 South William Street #4-E, New York City, NY 10004

Financial District, New York City, NY

Courtesy of MARK O'BRIEN DEVELOPMENT LLC

Last updated: October 13, 2026, 3:40 PM

## At a Glance

- **Listing Price**: $835,000
- **Beds**: 1
- **Baths**: 1
- **Sqft**: 738
- **Common Charges**: $1,069 / mo
- **Monthly Taxes**: $712 / mo
- **Price per Sqft**: $1,131
- **Brokerage Fee**: Share Eligible

## The Private Brokerage Advantage

As an independent luxury buyer representative, Régis shares 50% of the buyer-side commission he actually receives on your purchase. Eligible buyers receive that Buyer Commission Share directly at closing to offset closing costs, down payments, or renovations. The figures below are illustrative, based on a **3% buyer-broker commission**; your share follows the commission offered on the transaction.

- **Contract Purchase Price**: $835,000
- **Illustrative Buyer Commission Share**: -$12,525*
- **Illustrative Net Cost**: $822,475

*Illustrative Buyer Savings of $12,525 — 50% of a 3% buyer-broker commission, shared at closing.*

[Request a private tour](https://realestaterebatesnewyork.com/contact) · [Estimate your Buyer Commission Share](https://realestaterebatesnewyork.com/calculators/buyer-closing-cost-calculator)

## Property Overview

A one-bedroom inside Block Hall, the 1927 Tudor clubhouse on South William Street. It was built as a private club for the men who worked Wall Street. Now it’s 31 condos with high ceilings, hardwood floors, and kitchens fitted with Viking, Miele and Liebherr.

About 700 square feet. A real bedroom with a walk-in closet. A breakfast nook off the kitchen.

Step outside and you’re on Stone Street, Manhattan’s first paved road, lined with restaurants and cafes. The building has a roof deck, a fitness room, laundry on every floor, a virtual doorman. Pets welcome.

Five subway lines and the Staten Island Ferry within a few blocks.

## Property Details

- **Property Type**: Condominium
- **Beds**: 1
- **Baths**: 1
- **Rooms**: 3
- **Sqft**: 738 sqft
- **Stories**: 8
- **Year Built**: 1927
- **Price per Sqft**: $1,131
- **Common Charges**: $1,069 / Monthly
- **Monthly Taxes**: $712 / mo
- **Listed On**: Oct 12, 2026
- **Days on Market**: 2 Days

### Residence Features

- Building Washer Dryer Install Allowed
- Building Multiple Locations
- Common Area
- Building Roof Deck
- New Windows

## Estimated Monthly Payment

**$6,003 / month**, assuming a 20% down payment ($167,000), a 6.5% interest rate and a 30-year term. The page's calculator lets a buyer change all three.

- **Principal & Interest**: $4,222
- **Property Taxes**: $712
- **Common Charges**: $1,069

Estimates only. Actual payments may vary. Confirm terms with your lender.

## Sales and market data

### How this price compares

- **This home**: $835,000
- **Median sold price**: $982,500
- **Difference**: -$147,500 (-15%)
- **This home, $/ft²**: $1,131
- **Median $/ft²**: $1,239
- **Comparable sales**: 162
- **Sales from**: October 2024 – August 2026
- **Middle half of those sales**: $851,250 – $1,498,750

Based on condo one-bedroom sales in Financial District.

This building has not had enough comparable sales of its own in the period to support a median, so the benchmark is drawn from Financial District instead.

### How these sales were negotiated

- **Sale-to-list price**: 95.6% (144 sales)
- **Sold below asking**: 88% (144 sales)
- **Typical time to find a buyer**: 114 days (118 sales)
- **Typical time to close**: 56 days (144 sales)

Based on condo one-bedroom sales in Financial District with the required listing and closing data. Sample sizes vary by metric.

These are two separate periods measured on different clocks — time to find a buyer, and time from agreed deal to closing. They are medians of different sets of sales and do not add together into a single "days on market" figure.

### Price trend

Median sale price, condo and house one-bedroom sales in Financial District

| Year | Median sold price | Sales |
| --- | --- | --- |
| 2016 | $890,000 | 15 |
| 2017 | $1,295,000 | 131 |
| 2018 | $1,100,000 | 47 |
| 2019 | $938,486 | 45 |
| 2020 | $999,000 | 37 |
| 2021 | $940,000 | 62 |
| 2022 | $950,000 | 77 |
| 2023 | $996,500 | 92 |
| 2024 | $922,500 | 75 |
| 2025 | $999,500 | 96 |
| 2026 YTD | $1,260,000 | 51 |

Based on recorded condo and house one-bedroom sales in Financial District. 2026 is year-to-date.

Sales data through August 2026.

Sale prices are the consideration recorded with the City in ACRIS, and each sale is dated by the day the City recorded it. A closing date reported to the MLS typically falls one to two weeks earlier. Recorded sales describe what has already happened and are not an appraisal, a valuation, or an estimate of what this home will sell for.

[See every recorded sale at 21-23 South William Street](https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/21-23-south-william-street)

## About The Building

### 21-23 South William Street

21-23 South William Street, New York, NY 10004

A building in the neighborhood, currently featuring 1 active listing.

- **Year Built**: 1927
- **Active Units**: 1
- **Floors**: 8

[View the building page](https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/21-23-south-william-street)

### Available Residences — For Sale (1)

| Unit | Beds | Baths | Size | Price / Ft² | Price | Listing Office | Listed Date | Days on Market |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| [4-E](https://realestaterebatesnewyork.com/buy/newyorkcity/manhattan/10004/21-23-south-william-street-4e-ny-10004) | 1 | 1 | 738 sqft | $1,131 | $835,000 | MARK O'BRIEN DEVELOPMENT LLC | Oct 12, 2026 | 2 days |

## Financial District

Manhattan's Historic Power Center

[Explore Financial District](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/financial-district) · [All Neighborhoods](https://realestaterebatesnewyork.com/neighborhoods)

### Nearby Financial District

- [Battery Park City real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/battery-park-city)
- [Civic Center real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/civic-center)
- [Two Bridges real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/two-bridges)
- [Tribeca real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/tribeca)
- [Chinatown real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/chinatown)
- [Little Italy real estate for sale](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/little-italy)

## Related Links

- [21-23 South William Street — building page](https://realestaterebatesnewyork.com/buildings/new-york-city/manhattan/21-23-south-william-street)
- [Financial District neighborhood guide](https://realestaterebatesnewyork.com/neighborhoods/new-york-city/manhattan/financial-district)
- [Estimate your Buyer Commission Share and closing costs](https://realestaterebatesnewyork.com/calculators/buyer-closing-cost-calculator)
- [Contact Régis Roumila](https://realestaterebatesnewyork.com/contact)

---

> RLS IDX Data display by Real Estate Rebate Team. 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. IDX information is provided exclusively for consumers’ personal, non-commercial use and it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

> All information furnished regarding property for sale, rental or financing is from sources deemed reliable, but no warranty or representation is made as to the accuracy thereof and same is submitted subject to errors, omissions, change of price, rental or other conditions, prior sale, lease or financing or withdrawal without notice. All dimensions are approximate. For exact dimensions, you must hire your own architect or engineer and the number of bedrooms listed is for informational purposes and is not a legal conclusion. Please consult with your own architect or engineer for exact dimensions and legal specifications.