- Recorded closings
- 21
- Date range
- 2013–2025
- Median $/sf
- $2,055
- Listing discount
- 2.0%
- Monthly carry/sf
- $2.89
- Price range
- $512K – $17M
Change in the building’s median $/sf over each window, from the raw yearly medians — too few standardized single-line units here to adjust to an average-floor basis, so which apartments happened to trade moves these alongside price. (2022 marks the rate-shock inflection.) Like-for-like repeat-sale figures to follow.
21W20 prices as boutique Flatiron new-development product with an unusual plate: thirteen full-floor homes, a doorman, private landings, and a designated-district address between Fifth and Sixth. The comparable set is other small full-floor and half-floor condominiums in Flatiron and Ladies' Mile, not the large amenity towers of NoMad and Chelsea, whose economics and buyer are different.
Three adjustments matter. First, the building is really two products — nine roughly 1,300-square-foot full-floor homes and four penthouses two to four times that size. Building averages are meaningless; price the tier. Second, the 421-a expiry after fiscal 2023 reset the carry on every residence; a resale analysis must be run on post-2024 tax bills, and a seller who does not lead with that number will meet it in diligence. Third, common charges spread a full-time attended lobby across thirteen households, and the allocation between the residential section and the commercial unit is a real variable — read the budget rather than the amenity list.
Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
The complete recorded-sale history for 21W20, compiled from NYC Department of Finance transfer records and verified listing data, then enriched apartment-by-apartment by The Roebling Team research desk. Across sales with a public asking price, the building carries a median listing discount of 2.0% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy here.
Price per square foot over time
19 sales with a known square footage, by closing date.
Recent closings
The building’s 10 most recent market sales.
| Date | Unit | Apartment | Price | $/sf | vs. Ask |
|---|---|---|---|---|---|
| Oct 2, 2025 | PH1 | 4 BR · 4.5 BA · 4,841 sf | $9,950,000 | $2,055 | -15.3% |
| Jul 31, 2024 | 1 | 2 BR · 2 BA · 1,302 sf | $2,450,000 | $1,882 | -1.8% |
| Jun 9, 2023 | PH4 | 3 BR · 2.5 BA · 2,710 sf | $9,999,000 | $3,690 | -16.6% |
| Nov 17, 2021 | 5 | 2 BR · 2 BA · 1,302 sf | $2,346,215 | $1,802 | -2.0% |
| Jan 10, 2018 | PH1 | 4 BR · 4,841 sf | $9,523,387 | $1,967 | -20.3% |
| May 31, 2017 | PH2 | 4 BR · 4,663 sf | $13,965,000 | $2,995 | +0.0% |
| Feb 16, 2017 | 5 | 2 BR · 1,302 sf | $2,725,000 | $2,093 | -2.9% |
| Jan 10, 2017 | 7 | 2 BR · 1,302 sf | $2,700,000 | $2,074 | -9.2% |
| Jan 4, 2017 | PH2 | 4 BR · 4,663 sf | $12,578,137 | $2,697 | -9.9% |
| Jul 15, 2016 | 14PH4 | 2,710 sf | $10,185,250 | $3,758 | — |
The retrade record
Lines that have changed hands more than once in the public record — the building’s appreciation arc, apartment by apartment.
Every recorded sale
Sort any column; filter by unit or keyword. Prices are the recorded transfer amount at the NYC Department of Finance. Every sale sits in one of three states: counted in the building’s medians and trend; shown but excluded as a non-arms-length or nominal transfer; or shown and ⚑ flagged for review — a possible duplicate filing or an extreme $/sf outlier, held out of the statistics pending manual verification rather than allowed to move them.
| Apartment | ||||||
|---|---|---|---|---|---|---|
| Oct 2, 2025 | PH1 | 4 BR · 4.5 BA | 4,841 | $9,950,000 | $2,055 | -15.3% |
| Jul 31, 2024 | 1 | 2 BR · 2 BA | 1,302 | $2,450,000 | $1,882 | -1.8% |
| Jun 9, 2023 | PH4 | 3 BR · 2.5 BA | 2,710 | $9,999,000 | $3,690 | -16.6% |
| Nov 17, 2021 | 5 | 2 BR · 2 BA | 1,302 | $2,346,215 | $1,802 | -2.0% |
| Jan 10, 2018 | PH1Sponsor Sale | 4 BR | 4,841 | $9,523,387 | $1,967 | -20.3% |
| May 31, 2017 | PH2 | 4 BR | 4,663 | $13,965,000 | $2,995 | +0.0% |
| Feb 16, 2017 | 5Sponsor Sale | 2 BR | 1,302 | $2,725,000 | $2,093 | -2.9% |
| Jan 10, 2017 | 7Sponsor Sale | 2 BR | 1,302 | $2,700,000 | $2,074 | -9.2% |
| Jan 4, 2017 | PH2Sponsor Sale | 4 BR | 4,663 | $12,578,137 | $2,697 | -9.9% |
| Jul 15, 2016 | 14PH4Sponsor Sale | 2,710 | $10,185,250 | $3,758 | — | |
| Jun 27, 2016 | 12ASponsor Sale | 436 | $511,875 | $1,174 | — | |
| Jun 27, 2016 | 12PH3Sponsor Sale | 3,774 | $17,001,875 | $4,505 | — | |
| May 18, 2016 | 1Sponsor Sale | 2 BR | 1,302 | $2,543,283 | $1,953 | -0.1% |
| May 9, 2016 | 8Sponsor Sale | 2 BR | 1,302 | $3,098,230 | $2,380 | +1.9% |
| Apr 15, 2016 | 6Sponsor Sale | 2 BR | 1,302 | $2,874,215 | $2,208 | — |
| Apr 13, 2016 | 4Sponsor Sale | 2 BR | 1,302 | $2,765,002 | $2,124 | — |
| Apr 12, 2016 | 9Sponsor Sale | 2 BR | 1,302 | $3,136,083 | $2,409 | +4.0% |
| Apr 8, 2016 | 2Sponsor Sale | 2 BR | 1,302 | $2,543,283 | $1,953 | — |
| Apr 5, 2016 | 3Sponsor Sale | 2 BR | 1,302 | $2,726,568 | $2,094 | -0.1% |
| Dec 24, 2013 | DEV | — | $13,223,760 | — | — | |
| Jan 11, 2013 | DEVSponsor Sale | — | $9,750,000 | — | — |
Sources, exclusions and how these figures are computed
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00822-7506) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans. Storage, parking, and commercial units are excluded from all figures. Floor- and line-level $/sf are time-controlled (each sale measured against the building’s going rate at the time of sale) and expressed at today’s pricing, so they isolate the floor or line premium rather than blend two decades of market movement.
Put this data to work.
Know what’s fair before you offer — we’ll show you where each line trades, the building’s discount-to-ask pattern, and where the value sits right now.
Price to the building’s real trajectory, not a guess — we’ll position your line against its true comps to maximize the outcome.