Block Hall, 21 South William Street, #6C
Last Sold on May 15, 2006 for $593,639 ($1,122 / ft2)
1 bed, 1 bath, 529 / ft2
Pricing History
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About Block Hall, 21 South William Street
- Condo
- Built in 1927
- 31 Apartments
- 7 Floors
Building Amenities
- Conversion Year: 2005
- Concierge
- Pre War
- Central AC
- Rooftop Terrace
- Elevator
- Fitness Center
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at the southeast corner of Third Avenue
Lenox Hill
A remarkable blend of classicism and contemporary sensibility. Spacious two- to six-bedroom homes on the Upper East Side. Delivery summer 2025
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All closed sales data has been provided by the New York City Department of Finance via the Automated City Register Information System (ACRIS). No warranty or representation is made as to the accuracy of any data provided by ACRIS or any other sources.
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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 for no listing shall the number of bedrooms listed be considered a legal conclusion.
All closed sales data has been provided by the New York City Department of Finance via the Automated City Register Information System (ACRIS). No warranty or representation is made as to the accuracy of any data provided by ACRIS or any other sources.
CityRealty is committed to ensuring digital accessibility for individuals with disabilities. We are continuously working to improve the accessibility of our web experience for everyone, and we welcome feedback and accommodation requests. If you wish to report an issue or seek an accommodation, please contact us at accessibility@cityrealty.com.
An equal housing opportunity 
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