Back to 823 Classon Avenue (The Prospect) building profile
823 Classon Avenue (The Prospect)Recorded sales & closing prices
823 Classon Avenue, Brooklyn, NY 11238
43 recorded closings, 2011–2026. Sortable and searchable below.
- Recorded closings
- 43
- Date range
- 2011–2026
- Median $/sf
- $1,444
- Listing discount
- 2.3%
- Monthly carry/sf
- $0.59
- Price range
- $293K – $1.33M
Change in the building’s median $/sf over each window, on a floor-adjusted basis — standardized to the building’s average floor, so it reflects price rather than which floors happened to sell. This is a different method from The Roebling Index, which publishes plain medians and applies no floor adjustment; the two are not interchangeable. Floor adjustment standardizes for floor only. It does not control for condition, size, exposure, renovation or the mix of what happened to trade. (2022 marks the rate-shock inflection.) Like-for-like repeat-sale figures to follow.
823 Classon Avenue trades as early-2010s Crown Heights condominium stock, priced per square foot, with the seventh-floor duplexes in a separate tier. Resale turnover has been steady since the 2011 sellout — a few deeds most years per ACRIS, and a busier 2021. Within the building, value turns on outdoor space (the terraced 2A, 2B, 3A and 3B and the roof-terrace duplexes against the balcony lines), size, and whether the unit has lot-line windows.
Through the early 2020s, part of each unit's value came from the declining 421-a. That component is now close to zero, and after June 2027 it is gone. Comparisons against fully taxed buildings nearby become like-for-like from that point. Unit-level transaction history is maintained in The Roebling Research Library and shared with clients during diligence.
The complete recorded-sale history for 823 Classon Avenue (The Prospect), 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 2.3% from the last ask — a recurring negotiation gap worth pricing into any offer or listing strategy here.
Price per square foot over time
37 sales with a known square footage, by closing date.
Premium by line
Time-adjusted price per square foot by line, against the recent median. Line groups are not floor-controlled and do not isolate the value of light, outlook, layout or condition.
Recent closings
The building’s 10 most recent market sales.
| Date | Unit | Apartment | Price | $/sf | vs. Ask |
|---|---|---|---|---|---|
| Sep 3, 2026 | 5C | 1 BR · 1 BA · 611 sf | $853,000 | $1,396 | — |
| Aug 6, 2026 | 6C | 1 BR · 611 sf | $905,000 | $1,481 | — |
| Dec 19, 2024 | 4B | 2 BR · 2 BA · 838 sf | $1,175,000 | $1,402 | +14.6% |
| Dec 3, 2021 | 5D | 2 BR · 2 BA · 1,100 sf | $1,330,000 | $1,209 | -1.5% |
| Aug 10, 2021 | 5C | 1 BR · 1 BA · 611 sf | $717,000 | $1,173 | +5.6% |
| Jun 18, 2021 | 2D | 1 BR · 1 BA · 490 sf | $625,000 | $1,276 | +14.7% |
| Feb 18, 2021 | 3A | 2 BR · 2 BA · 1,045 sf | $1,305,000 | $1,249 | -9.9% |
| Jan 6, 2021 | 6A | 2 BR · 2 BA · 845 sf | $938,000 | $1,110 | +0.0% |
| Oct 2, 2019 | 3D | 1 BR · 1 BA · 490 sf | $606,000 | $1,237 | -6.8% |
| Sep 25, 2019 | 4C | 1 BR · 1 BA · 611 sf | $735,000 | $1,203 | -5.6% |
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 3, 2026 | 5C | 1 BR · 1 BA | 611 | $853,000 | $1,396 | — |
| Aug 6, 2026 | 6C | 1 BR | 611 | $905,000 | $1,481 | — |
| Dec 19, 2024 | 4B | 2 BR · 2 BA | 838 | $1,175,000 | $1,402 | +14.6% |
| Dec 3, 2021 | 5D | 2 BR · 2 BA | 1,100 | $1,330,000 | $1,209 | -1.5% |
| Aug 10, 2021 | 5C | 1 BR · 1 BA | 611 | $717,000 | $1,173 | +5.6% |
| Jun 18, 2021 | 2D | 1 BR · 1 BA | 490 | $625,000 | $1,276 | +14.7% |
| May 19, 2021 | 6C | 1 BRnon-market transfer (excluded from $/sf & trends) | 611 | $200,000 | — | — |
| Feb 18, 2021 | 3A | 2 BR · 2 BA | 1,045 | $1,305,000 | $1,249 | -9.9% |
| Jan 6, 2021 | 6A | 2 BR · 2 BA | 845 | $938,000 | $1,110 | +0.0% |
| Oct 2, 2019 | 3D | 1 BR · 1 BA | 490 | $606,000 | $1,237 | -6.8% |
| Sep 25, 2019 | 4C | 1 BR · 1 BA | 611 | $735,000 | $1,203 | -5.6% |
| Jul 10, 2018 | 7B | 2 BRnon-market transfer (excluded from $/sf & trends) | — | $2,950,000 | — | — |
| Nov 29, 2017 | 4A | 2 BR | 845 | $925,000 | $1,095 | +0.0% |
| Apr 13, 2017 | 6D | 2 BR | 1,100 | $650,000 | $591 | -2.8% |
| Apr 13, 2017 | 5B | 2 BR | 838 | $485,000 | $579 | +0.0% |
| Apr 13, 2017 | 6A | 2 BR | 845 | $506,899 | $600 | -9.3% |
| Apr 12, 2017 | 2A | 2 BR | 1,045 | $630,000 | $603 | -1.4% |
| Apr 12, 2017 | 3A | 2 BR | 1,045 | $644,000 | $616 | +0.8% |
| Aug 1, 2016 | 5D | 2 BRnon-market transfer (excluded from $/sf & trends) | — | $1,285,000 | — | — |
| Jul 7, 2016 | 3D | 1 BR · 1 BAoutside the market statistics (eligibility screen) | — | $590,000 | — | -4.7% |
| Nov 24, 2014 | 4BSponsor Sale | 2 BR · 2 BA | 838 | $795,000 | $949 | +0.8% |
| Nov 12, 2014 | 2E | 1 BR · 1 BA | 611 | $608,000 | $995 | — |
| Sep 15, 2014 | 3C | 1 BR | 611 | $675,000 | $1,105 | — |
| Dec 13, 2013 | 5C | 1 BR | 611 | $541,000 | $885 | +0.0% |
| Sep 19, 2011 | 2ESponsor Sale | 1 BR · 1 BA | 611 | $347,500 | $569 | -10.7% |
| Aug 18, 2011 | 2CSponsor Sale | 1 BR · 1 BA | 611 | $343,500 | $562 | -6.9% |
| Aug 18, 2011 | 5ASponsor Sale | 2 BR | 845 | $489,000 | $579 | +0.0% |
| Aug 15, 2011 | 2ASponsor Sale | 2 BR · 2 BA | 1,045 | $630,000 | $603 | -9.9% |
| Jul 27, 2011 | 3ASponsor Sale | 2 BR · 2 BA | 1,045 | $644,000 | $616 | -7.9% |
| Jul 6, 2011 | 6ASponsor Sale | 2 BR · 2 BA | 845 | $506,899 | $600 | -7.7% |
| Jul 6, 2011 | 2DSponsor Sale | 1 BR · 1 BA | 490 | $293,046 | $598 | +1.4% |
| Jun 29, 2011 | 5BSponsor Sale | 2 BR · 2 BA | 838 | $491,790 | $587 | -8.8% |
| Jun 3, 2011 | 2BSponsor Sale | 1 BR · 1 BA | 635 | $355,000 | $559 | -11.0% |
| May 27, 2011 | 3BSponsor Sale | 1 BR | 635 | $362,500 | $571 | -1.8% |
| May 18, 2011 | 7ASponsor Sale | 2 BR | 2,694 | $1,109,892 | $412 | -14.6% |
| May 12, 2011 | 5CSponsor Sale | 1 BRoutside the market statistics (eligibility screen) | — | $370,000 | — | -2.4% |
| May 11, 2011 | 6BSponsor Sale | 2 BR | 838 | $488,000 | $582 | -2.2% |
| May 10, 2011 | 4CSponsor Sale | 1 BR · 1 BA | 611 | $355,000 | $581 | — |
| May 10, 2011 | 3ESponsor Sale | 1 BRoutside the market statistics (eligibility screen) | 311 | $355,000 | $1,141 | — |
| May 6, 2011 | 3CSponsor Sale | 1 BR | 611 | $350,000 | $573 | -2.5% |
| May 5, 2011 | 3DSponsor Sale | 1 BR | 490 | $299,000 | $610 | +0.0% |
| May 4, 2011 | 6CSponsor Sale | 1 BR | 611 | $382,500 | $626 | -1.7% |
| Apr 27, 2011 | 6DSponsor Sale | 2 BR · 2 BA | 1,100 | $650,000 | $591 | -4.3% |
Sources, exclusions and how these figures are computed
Sales sourced from NYC Department of Finance recorded transfers (BBL 3-01178-7502; each condominium apartment is its own tax lot). 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.
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646.939.7375 · c.cohen@compass.com