For Sale · Listing by MARK O'BRIEN DEVELOPMENT LLC
21-23 S William Street #4-E
Financial District, Manhattan
$835,000
21-23 S William Street #4-E
MLS® #RLS20120653
Listing by MARK O'BRIEN DEVELOPMENT LLC
- 1
- Bedroom
- 1
- Bath
- 738
- Sq. Ft.
- 1927
- Year Built
Quick Summary
Property Highlights
- Exposure: East facing
- Style: Prewar,Loft architecture
- Character: Pre-war building (1927)
Property Details
Listing History
| Event | Date | Price | Change |
|---|---|---|---|
| Listed | Oct 12, 2026 | $835,000 | - |
| Currently | Oct 14, 2026 | $835,000 | - |
Description
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.
Features & Amenities
Interior Features
Exterior Features
Building Amenities
Building Information
Financial Details
About Financial District
View All Financial District ListingsThe Financial District occupies the southern tip of Manhattan, where landmark office towers have been converted into spacious residential lofts alongside new luxury high-rise condominiums with river and harbor views. The Oculus and Fulton Center transit hubs connect over a dozen subway lines, including the 2, 3, 4, 5, A, C, J, and Z trains, making it one of the best-connected neighborhoods in the city. Battery Park, Bowling Green, and the 9/11 Memorial provide open green space and waterfront access at the foot of the skyline.
Financial District Live Market Data
View NeighborhoodActive Listings
232
Median Asking Price
$1.18M
Median $/Sqft
$1,275
Avg Days on Market
N/A
New This Week
17
Price Reduced
24%
Sold (30 Days)
21
Median Sale Price
$1.08M
Live data from RLS at REBNY • Updated 10/13/26, 11:44 PM EST
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Location
21-23 S William Street #4-E, Financial District, New York County • Near Broad Street/Hanover Square
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 common charges are $1,069 per month. Confirm the exact amount with Milton Coste before making an offer.
The current listed annual property tax is $8,544, or roughly $712 per month. Verify the current assessment with your attorney before closing.
This property has 1 bedroom and 1 full bathroom.
The listed interior living area is 738 square feet. Verify dimensions independently during due diligence.
According to MLS records, the building was constructed in 1927, making it approximately 99 years old.
This listing is a condominium. Buyers receive a deed to their individual unit and own their space outright, subject to condo association rules.
Pets are permitted at this property. Contact Milton Coste for weight limits or breed restrictions.
At the current list price of $835,000 for 738 sq ft, the asking price per square foot is approximately $1,131. 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 milton@miltoncoste.com. 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 MARK O'BRIEN DEVELOPMENT LLC - MARK D OBRIEN
Listing Contact: (917) 485-4020
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.
How working with a buyer's agent works: I work for you, not the seller. Before I show you anything, New York brokerage rules ask us to put that in writing: an agreement and a disclosure that say I work for you and negotiate on your behalf. The agreement is non-exclusive: you can work with other agents, it runs for a short fixed term we agree on, and you can end it with a note. You may attend open houses independently without an agreement. Read how it works
RLS Data display by Keller Williams NYC. Data last updated on 10/14/2026 at 3:44 AM UTC
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Sale history, taxes, violations and comps for this unit
Before you bid
Pre-Offer Report: 21-23 S William Street #4-E
At $835,000, the listing leaves out what decides the offer: the recorded sale history, the tax and abatement picture, open building violations and permits, and the closed sales that set the price. Milton prepares the report from public records. No obligation.
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What happens next
- 1Milton emails you today.
- 2A short call about what you want and when.
- 3The agreement arrives electronically after the call. Then showings.
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You're contacting Milton Coste, a buyer's agent. Before any private showing, New York brokerage rules require a short non-exclusive agreement. Milton walks you through it before you sign anything. Broker commissions are not set by law and are fully negotiable. How working together works.
Financial District Market Update
21 sales last 30 days · $1.18M median · 11 months supply
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Quick Facts
Monthly Costs Estimate
$167,000
Source: Freddie Mac PMMS
Est. Monthly Payment
$0
Estimates only. Consult a lender for exact figures.
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