31 West 21st StreetRecorded sales & closing prices
31 West 21st Street, New York, NY 10010
23 recorded closings, 2004–2025. Sortable and searchable below.
- Recorded closings
- 23
- Date range
- 2004–2025
- Median $/sf
- $1,018
- Listing discount
- 2.7%
- Monthly carry/sf
- $1.84
- Price range
- $1.43M – $14.6M
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.
31 West 21st Street prices as full-floor Flatiron loft product — residences valued per square foot, with the premium concentrated in the upper floors, the penthouse and its terrace, and the light that the canted bays produce. The comparable set is the wide-plate loft conversions of the Flatiron side streets and lower Fifth Avenue, not the narrow single-lot conversions or the amenitised condominiums on Park Avenue South, whose operating economics differ.
Two things shape underwriting. The first is that, unlike much of what surrounds it, this building has a deep resale record — most residences have traded two, three or four times since the 2002–2004 sellout, so line-by-line internal analysis is actually possible here and should be done. The second is the eleven-unit denominator against an assessment-funded capital model: the right question is not what the common charge is but what the total annual cost of ownership has been across a full capital cycle. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
The complete recorded-sale history for 31 West 21st Street, 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 2.7% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy here.
Price per square foot over time
20 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 |
|---|---|---|---|---|---|
| Sep 19, 2025 | 5 | 4 BR · 3 BA · 4,713 sf | $4,800,000 | $1,018 | -16.5% |
| Mar 1, 2022 | 6 | 4 BR · 4.5 BA · 4,713 sf | $6,750,000 | $1,432 | +0.0% |
| Jan 5, 2022 | 7 | 4 BR · 3.5 BA · 4,713 sf | $6,250,000 | $1,326 | -3.8% |
| May 4, 2021 | 4 | 3 BR · 3 BA · 4,713 sf | $4,750,000 | $1,008 | -24.0% |
| Jan 29, 2020 | LOFT | 4 BR · 3.5 BA · 4,713 sf | $5,862,000 | $1,244 | -26.7% |
| Jan 28, 2020 | 7 | 4 BR · 3.5 BA · 4,713 sf | $5,862,000 | $1,244 | — |
| Jun 8, 2018 | 9 | 4 BR · 4,713 sf | $7,995,000 | $1,696 | -10.7% |
| Aug 4, 2017 | 3 | 3 BR · 4,713 sf | $5,500,000 | $1,167 | -8.3% |
| Apr 4, 2017 | 2A | 2,610 sf | $3,025,000 | $1,159 | — |
| Mar 11, 2017 | 2N | 3 BR · 2,610 sf | $3,025,000 | $1,159 | -23.4% |
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 | ||||||
|---|---|---|---|---|---|---|
| Sep 19, 2025 | 5 | 4 BR · 3 BA | 4,713 | $4,800,000 | $1,018 | -16.5% |
| Mar 1, 2022 | 6 | 4 BR · 4.5 BA | 4,713 | $6,750,000 | $1,432 | +0.0% |
| Jan 5, 2022 | 7 | 4 BR · 3.5 BA | 4,713 | $6,250,000 | $1,326 | -3.8% |
| May 4, 2021 | 4 | 3 BR · 3 BA | 4,713 | $4,750,000 | $1,008 | -24.0% |
| Jan 29, 2020 | LOFT | 4 BR · 3.5 BA | 4,713 | $5,862,000 | $1,244 | -26.7% |
| Jan 28, 2020 | 7 | 4 BR · 3.5 BA | 4,713 | $5,862,000 | $1,244 | — |
| Jun 8, 2018 | 9 | 4 BR | 4,713 | $7,995,000 | $1,696 | -10.7% |
| Aug 4, 2017 | 3 | 3 BR | 4,713 | $5,500,000 | $1,167 | -8.3% |
| Apr 4, 2017 | 2A | 2,610 | $3,025,000 | $1,159 | — | |
| Mar 11, 2017 | 2N | 3 BR | 2,610 | $3,025,000 | $1,159 | -23.4% |
| Nov 19, 2014 | 10 | 4,713 | $8,900,000 | $1,888 | — | |
| Sep 5, 2014 | 9 | 4 BR | 4,776 | $7,800,000 | $1,633 | -1.2% |
| May 15, 2013 | 2S | 2 BR · 2 BA | 1,926 | $2,600,000 | $1,350 | +4.2% |
| May 9, 2013 | 2B | 2 BR · 2 BA | 1,921 | $2,600,000 | $1,353 | — |
| Jul 21, 2011 | PH12 | 4 BR | 6,250 | $14,600,000 | $2,336 | -2.7% |
| Jul 21, 2011 | 11PH | 4 BR · 5 BA | 6,250 | $14,600,000 | $2,336 | -2.7% |
| May 4, 2011 | COM | non-market transfer (excluded from $/sf & trends) | 7,520 | $2,421,087 | — | — |
| Apr 3, 2006 | 5 | 3 BR | 4,713 | $3,900,000 | $827 | +0.0% |
| Dec 21, 2004 | 2S | 2 BR | 1,926 | $1,425,000 | $740 | +0.0% |
| Dec 20, 2004 | 2B | 2 BR · 2 BA | 1,921 | $1,567,000 | $816 | — |
| Nov 29, 2004 | 9 | 3 BRnon-market transfer (excluded from $/sf & trends) | 4,713 | $1,323,725 | — | — |
| Jun 11, 2004 | 3 | 3 BR | 4,713 | $2,950,000 | $626 | -1.5% |
| Mar 26, 2004 | 6 | non-market transfer (excluded from $/sf & trends) | 4,713 | $2,080,000 | — | — |
Sources, exclusions and how these figures are computed
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00823-7503) 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.