Infinity FlatsRecorded sales & closing prices
24 East 21st Street, between Broadway and Park Avenue South, Flatiron
16 recorded closings, 2007–2026. Sortable and searchable below.
- Recorded closings
- 16
- Date range
- 2007–2026
- Median $/sf
- $1,496
- Listing discount
- 0.4%
- Monthly carry/sf
- $2.08
- Price range
- $3.78M – $7M
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.
The complete recorded-sale history for Infinity Flats, compiled from NYC Department of Finance transfer records, with apartment-by-apartment detail from The Roebling Research Library. Across sales with a public asking price, the building carries a median listing discount of 0.4% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy here.
Price per square foot over time
16 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 |
|---|---|---|---|---|---|
| Aug 3, 2026 | 2 | 3 BR · 4.5 BA · 4,073 sf | $5,250,000 | $1,289 | -7.1% |
| May 26, 2026 | PH | 4 BR · 4.5 BA · 4,109 sf | $6,995,000 | $1,702 | +0.0% |
| Nov 20, 2018 | 6 | 3 BR · 4.5 BA · 4,109 sf | $5,100,000 | $1,241 | +0.0% |
| Jul 3, 2012 | PH | 4 BR · 4,109 sf | $6,000,000 | $1,460 | -4.0% |
| Jun 24, 2011 | 3 | 4 BR · 4,109 sf | $4,300,000 | $1,046 | — |
| Jul 29, 2010 | 5 | 4 BR · 4,109 sf | $3,975,000 | $967 | -0.6% |
| Jul 22, 2010 | 4 | 4 BR · 4,109 sf | $4,100,000 | $998 | -4.5% |
| Apr 29, 2010 | 2 | 4 BR · 4,073 sf | $3,780,000 | $928 | -5.5% |
| Sep 7, 2007 | 8 | 3 BR · 4,109 sf | $5,167,619 | $1,258 | +0.8% |
| Aug 31, 2007 | 3 | 4 BR · 4,109 sf | $4,391,203 | $1,069 | — |
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 | ||||||
|---|---|---|---|---|---|---|
| Aug 3, 2026 | 2 | 3 BR · 4.5 BA | 4,073 | $5,250,000 | $1,289 | -7.1% |
| May 26, 2026 | PH | 4 BR · 4.5 BA | 4,109 | $6,995,000 | $1,702 | +0.0% |
| Nov 20, 2018 | 6 | 3 BR · 4.5 BA | 4,109 | $5,100,000 | $1,241 | +0.0% |
| Jul 3, 2012 | PH | 4 BR | 4,109 | $6,000,000 | $1,460 | -4.0% |
| Jun 24, 2011 | 3 | 4 BR | 4,109 | $4,300,000 | $1,046 | — |
| Jul 29, 2010 | 5 | 4 BR | 4,109 | $3,975,000 | $967 | -0.6% |
| Jul 22, 2010 | 4 | 4 BR | 4,109 | $4,100,000 | $998 | -4.5% |
| Apr 29, 2010 | 2 | 4 BR | 4,073 | $3,780,000 | $928 | -5.5% |
| Sep 7, 2007 | 8 | 3 BR | 4,109 | $5,167,619 | $1,258 | +0.8% |
| Aug 31, 2007 | 3 | 4 BR | 4,109 | $4,391,203 | $1,069 | — |
| Aug 24, 2007 | 2 | 4 BR | 4,073 | $5,065,793 | $1,244 | +1.8% |
| Aug 23, 2007 | PH | 4 BR | 4,109 | $6,109,500 | $1,487 | -6.0% |
| Aug 21, 2007 | 4 | 4 BR | 4,109 | $4,862,144 | $1,183 | -0.3% |
| Aug 21, 2007 | 6 | 4 BR | 4,109 | $5,116,706 | $1,245 | +1.8% |
| Aug 17, 2007 | 7 | 3 BR | 4,109 | $5,142,163 | $1,251 | +1.8% |
| Aug 10, 2007 | 5 | 4 BR | 4,109 | $4,887,600 | $1,189 | -1.3% |
Sources, exclusions and how these figures are computed
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-00849-7506). Apartment-level facts (line, condition, asking-price context) curated and cross-verified in The Roebling Research Library. 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.