73 Kosciusko Street
Brooklyn · Parcel 3017787502
523,315 sq ft
Building area
$29,211,750
Assessed value
Analysis
AI-generated Risk: Medium
The property offers a brand‑new, high‑end asset with no current violations, but its over‑built residential floor‑area and absence of a recent arm‑length sale create medium‑level risk for investors.
The good
- building constructed in 2024, so all systems are brand new
- zero open violations and no legal proceedings
- large average unit size of 3,738 sq ft suggests premium apartments
- substantial number of permits (48) indicates completed construction
The bad
- built beyond its residential floor‑area limit (residential FAR 10.99 vs limit 6.02) – over‑built and cannot be expanded
- no arm‑length sale recorded, market value on record is 0, indicating lack of recent comparable transaction
- residential FAR exceeds the limit, limiting future redevelopment options
- despite zero enforcement penalties, the over‑built status is a material risk
Written by a language model from this property's own figures — the same numbers shown on this page. It introduces no facts of its own: every figure it cites is checked against the data before the text is shown. It is a reading of the numbers, not a professional opinion, and it can be wrong about emphasis even when it is right about arithmetic. See our methodology.
What the numbers say
Generated from this property's own figures using the rules set out in our methodology. Every statement below refers to a number shown on this page.
Already larger than residential zoning would allow
The building occupies a floor-area ratio of 10.99, against a residential limit of 6.02 — it is over that limit by 4.97. A building in this position almost always predates the current rules and is legally non-conforming: it may generally remain, but it typically cannot be enlarged for residential use, and it may not be rebuildable as it stands.
No open violations on record
Nothing is currently outstanding against this property. Closed violations are not counted here — a violation that was raised and then fixed is a problem that went away, and an older building will have accumulated many of them. What matters is what is still open, and here that is nothing.
Development & zoning
Floor-area ratio
| Built | 10.99 |
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| Residential limit | 6.02 |
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| Commercial limit | 0.00 |
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| Community-facility limit | 6.50 |
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Development headroom (calculated) calculated
| Highest permitted ratio | 6.50 |
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| Unused ratio | -4.49 |
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| Unused buildable area | — |
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| Lot area | 47,600 sq ft |
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Value & taxes
Assessment
| Assessed total | $29,211,750 |
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| Assessed land | $6,091,200 |
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| Assessed building | $23,120,550 |
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| Market value on record | $0 |
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| Assessed as % of market | — |
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Tax
| Tax class | 2 |
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| Taxable assessed | $0 |
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| Tax rate | 12.502% |
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| Estimated annual levy | — |
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The levy is an estimate — taxable value × the published rate for the class. It does not account for exemptions or abatements the property may carry, and will not match an actual bill. It is not the property's total debt to the city: unpaid tax and water arrears are not shown anywhere on this page.
Building & occupancy
Structure
| Year built | 2024 |
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| Floors | 11 |
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| Building area | 523,315 sq ft |
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| Residential area | 113,468 sq ft |
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| Commercial area | 274,255 sq ft |
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Occupancy
| Ownership | Condominium |
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| Total units | 252 |
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| Residential units | 140 |
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| Rent-stabilized | 52 |
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| Free Market / Other | 88 |
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| Residential Avg unit size | 810 sq ft (calculated) |
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| Commercial Avg unit size | 2,449 sq ft (calculated) |
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| Building class | RM |
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Neighborhood, risk & energy
Neighborhood & transit
| Nearest subway | Bedford-Nostrand Avs (G) — 0.11 mi |
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| School district | 13 |
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| Police precinct | 79 |
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| Nearest firehouse | Ladder 102 — 850 Bedford Ave. |
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Location risk
| Flood zone | Minimal hazard (Zone X) |
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| Hurricane evacuation zone | Not in an evacuation zone |
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Comparable sales
| Address | Sale date | Price | Sq ft | $/sq ft |
|---|
| 610 Dekalb Avenue, B504 | 2026-06-19 | $1,321,689 | — | — |
| 600 Dekalb Avenue, A202 | 2026-06-12 | $1,500,000 | — | — |
| 600 Dekalb Avenue, A901 | 2026-06-11 | $1,456,098 | — | — |
| 610 Dekalb Avenue, B604 | 2026-06-10 | $1,185,000 | — | — |
| 610 Dekalb Avenue, B901 | 2026-06-09 | $1,435,733 | — | — |
| 600 Dekalb Avenue, A704 | 2026-06-08 | $1,130,000 | — | — |
| 610 Dekalb Avenue, B502 | 2026-06-05 | $1,400,000 | — | — |
| 600 Dekalb Avenue, A701 | 2026-06-03 | $1,499,246 | — | — |
Record activity
Compliance calculated
| Open violations | 0 |
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| Open per residential unit | 0.0 (calculated) |
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| Enforcement penalties | $0.00 |
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| Safety-violation penalties | Not available |
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| Total penalties owed | — |
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| On tax-lien sale list | No |
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Activity
| Complaints recorded | 14 |
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| Permits / alterations | 48 |
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| Recorded documents | 0 |
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| Legal proceedings | 0 |
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Total penalties owed combines two separate debts — enforcement penalties (from summonses) and safety-violation penalties (unfiled inspections and reports on boilers, elevators, facades and energy use). The second kind accrues quietly and is routinely missed; it is a standing debt on the building, not a fine someone can walk away from. The safety figure could not be retrieved for this property, so no total is shown — we would rather show nothing than a total that silently omits it. Neither figure includes unpaid property tax or water and sewer arrears, which are frequently the largest number of all and appear nowhere on this page. For a true payoff figure, go to the city directly.
Ownership & last recorded sale
Owner of record
| Owner | 270 Nostrand Propco LLC |
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| Parcel | 3017787502 |
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| Block | 1778 |
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| Lot | 7502 |
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Last recorded transfer
| Date | — |
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| Recorded price | — |
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| Price per unit | Not meaningful |
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| Price vs assessed | Not meaningful |
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Owner of record comes from the public land-use record and may lag a recent sale. It is frequently a holding company rather than an individual. If you own or manage this property and believe something here is wrong, tell us — we read and respond to every message of that kind.
Complaints
A complaint is an allegation, not a finding — many are dismissed. A sustained pattern is nevertheless informative about how a building is run.
Permits & alterations
The absence of a permit does not prove no work was done — it may equally mean work was done without one.
About this page
Compiled from New York City public records — retrieved today. Coverage on this parcel: 13 of 15 record groups populated. The derived figures — unused floor-area ratio, buildable area, the assessed-value trend and the per-unit ratios — are calculated by us and appear in no public dataset; the formulas are in the methodology.
This is a research tool, not advice. It is not a title search, a lien search, a survey or an inspection, and it does not replace any of them. If a figure here matters to a decision, verify it at the source. See Terms.