21 South William Street
Financial District · 21 South William Street, New York, NY · Deed-verified
21 South William Street in Financial District, New York has 67 recorded condominium sales dating back to 2006. Over the last five years, its median sale price is $854K and its median price per square foot is $1,199. Every figure below is drawn from recorded deeds — not listings, not estimates.
21 South William Street is one of 72 condo buildings CURVE covers in Financial District, where the median building recorded $1,096 per square foot over the last five years. By that measure it ranks #21 of 53 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in 21 South William Street, by year, with that year's median price.
Sales by price point
How 67 recorded sales distribute across the price ladder.
Unit mix sold
Bedroom count across recorded sales.
10 most recent sales
| Unit | Date | Beds | Type | Price | $/SF | Change |
|---|---|---|---|---|---|---|
| 2D | 9/22/2023 | 1 Bed | Resale 1 | $872K | $1,358/SF | vs prior sale +21% |
| 3D | 6/13/2023 | 1 Bed | Resale 1 | $835K | $1,121/SF | vs prior sale +14% |
| 6B | 1/17/2023 | 1 Bed | Resale 3 | $710K | $1,108/SF | vs prior sale -4% |
| 5D | 7/22/2022 | 1 Bed | Resale 1 | $875K | $1,276/SF | vs prior sale +7% |
| 6D | 8/30/2021 | 1 Bed | Resale 2 | $840K | $1,223/SF | vs prior sale +5% |
| 2E | 8/12/2021 | 1 Bed | Resale 1 | $735K | $1,053/SF | vs prior sale +2% |
| 6E | 12/31/2018 | 1 Bed | Resale 2 | $835K | $1,196/SF | vs prior sale +18% |
| 6A | 7/26/2018 | Studio | Resale 2 | $585K | $1,156/SF | vs prior sale +18% |
| 7A | 3/20/2018 | Studio | Resale 2 | $575K | $1,258/SF | vs prior sale +7% |
| 3C | 1/29/2018 | 1 Bed | Resale 3 | $675K | $1,276/SF | vs prior sale +8% |
The full 21 South William Street record
You are seeing the summary. Members see the deeds.
- All 67 recorded sales
- Every unit's resale chain
- Buyer & seller names
- Financing & deed citations
- Condo docs + AI
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About this record
Where does this data come from?
Every sale shown is a deed recorded with the New York registry — the legal record of the transaction, not a listing or an estimate. CURVE assembles, verifies and reconciles each one to the building and the unit.
How many sales are in 21 South William Street?
67 recorded sales, going back to 2006, of which 37 are resales. This page shows the 10 most recent; members see all of them.
What has 21 South William Street done over time?
Resales in the building have changed hands at an average of +6.3% against their prior recorded price, after an average hold of 7.5 years.
What do members see that I don't?
The complete sales table, each unit's full chain of title, buyer and seller names, financing detail, the deed book and page behind every figure, the condo documents, and reports you can send to a client.