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21 South William Street
Last updated on Apr 3, 2026

Block Hall,
21 South William Street

This 7-story, Tudor-style building at 21-23 South William Street was converted to a residential condominium in 2005. It has 31 apartments and is known as Block Hall.

21 South William Street Location Map
Unit #
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Asking Price
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Overview of Block Hall at 21 South William Street

Block Hall, located at 21-23 South William Street, is a 7-story Tudor-style building that was converted into a residential condominium in 2005. Originally built in 1927 as a private club, the building features 31 apartments and retains its historical charm while offering modern amenities. The property was acquired by the Kennelly Development Company in 2004 and has since become a notable residence in the Financial District, surrounded by the historic cobblestone streets of Stone Street.

Residents enjoy a range of amenities including a rooftop deck with stunning views, a fitness center, and laundry facilities on every floor. The apartments are characterized by high ceilings, hardwood floors, and state-of-the-art appliances from brands like Viking, Miele, and Liebherr. Many units also feature spacious layouts, oversized windows, and luxurious bathrooms, making them ideal for both relaxation and entertaining.

Block Hall's location offers convenient access to major transportation hubs and is just steps away from Wall Street, placing residents in the heart of the city's financial activity. The building's unique history and boutique atmosphere provide a tranquil escape from the bustling urban environment, complemented by nearby cafes and restaurants that enhance the neighborhood's charm.

Notable for its architectural significance and modern living experience, Block Hall stands out as a desirable option for those seeking a blend of history and contemporary comfort in Manhattan.

Doorman
None
Type
Condo
Year Built
1927
Converted: 2005
Apartments
Floors
7
Neighborhood
Min Down
20%

Amenities

  • Concierge
  • Pre War
  • Central AC
  • Rooftop Terrace
  • Elevator
  • Fitness Center
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at Nassau and Cedar 0.15 miles
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at null and null 0.15 miles
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  2. 5
at Broadway and Battery Pl 0.18 miles
  1. 2
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at William and Cedar 0.19 miles
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  2. C
at William 0.41 miles

Sales Summary

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Sales History by Apartment Size

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Pricing Comparison of Similar Buildings

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520 Fifth Avenue
at the northwest corner of West 43rd Street
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Learn More