41 Blue Slip
BBL BK-2472-50 · Generated March 18, 2026
296,216
zoning SF (top scenario)
42
stories (top scenario)
287
units (top scenario)
445
max height (ft)
14
scenarios
Massing and elevation
The top scenario's massing, drawn from the engine's per-floor plates: an axonometric of the volume and a side elevation with story heights and use mix. Where the ground floor reads wider than the floors above, that is the computed setback envelope, not a stylization. The full report adds cross-sections at the critical heights and the sky-exposure plane.
Site context
Brooklyn waterfront multifamily, 485-x eligible
Synthesized floor plans
Per-floor plans drawn by the engine from the buildable envelope: cores sized to code, corridors, apartments with rooms and fixtures, and the roof with its bulkheads. Diagrammatic, for feasibility; not for construction. The PDF carries every floor of every scenario with a unit schedule under each plan.
Floor 1 · Ground · double loaded corridor
33,154 GSF · RESIDENT AMENITY, COMMERCIAL 2, COMMERCIAL 1
Floor 2 · Typical · double loaded corridor
31,817 GSF · CLASSROOM 4, CLASSROOM 3, CLASSROOM 2
FAR, envelope and program
The engine's interpretation of the lot's zoning rules, applied to produce the buildable envelope, height, and per-floor program.
Program breakdown · Mixed Use (Residential + Community) Scenario
345,940
GSF · FAR 6.10
Stacking diagram
42 floors · 445 ft · bar width = floor plate size
The envelope, rule by rule.
Every constraint the engine applied to R8, with the Zoning Resolution section that imposed it. The full report carries the complete citation table and a rule browser that explains each number from its inputs.
Envelope · R8
Form: Standard Housing. District permits both forms. The standard height and setback regulations of ZR 23-432 are recommended: they apply as of right with no election and typically yield a fuller envelope than the optional sky exposure plane building of ZR 23-73 on lots <100 ft deep. The sky exposure plane building is shown as the comparative option.
What the Code requires for this building.
Chapter 5 and its neighbours, applied to the Mixed Use (Residential + Community) Scenario scenario: construction type, egress, elevators, sprinklers, accessibility. This is the part an architect checks first.
4 passenger, 1 stretcher-capable, 1 freight/service
City of Yes and the tax programs, checked.
Which bonus programs the lot qualifies for and what each one is worth here, and which tax incentives a project on it could claim. The report models the qualifying scenarios as buildings, not footnotes.
City of Yes provisions
Vesting: 2025-12-05
Tax and incentive programs
Approvals, parking, air rights, and the engine's own audit.
Four more sections from this lot's report. Each runs several pages in the PDF.
Approvals and procedures
1 required procedure(s). (E) designation on the lot.
Full section: required procedures, ULURP scope, LPC and (E) designations
Parking
Inner Transit Zone.
Full section: every configuration, cost and its hit to buildable area
Block air rights
Unused development rights across 29 lots on block 02472; the block is 52.2% built out.
Full section: every lot on the block with its unused floor area
Engine validation
14 high · 0 medium · 0 low. The report shows its own doubts rather than hiding them.
Full section: every check the engine ran against its own output
Side-by-side comparison
Every viable build path: 14 scenarios computed for this lot.
| Scenario | FAR | Buildable SF | Floors | Height (ft) | Units |
|---|---|---|---|---|---|
| Maximum Area Scenario | 7.20 | 403,934 | 42 | 445 | 458 |
| Universal Affordability Preference (UAP) Scenario | 6.42 | 364,536 | 42 | 445 | 408 |
| Universal Affordability Preference (UAP) Scenario (Capped at 99 Units) | 6.42 | 364,536 | 42 | 445 | 99 |
| Mixed Use (Residential + Community) Scenario | 6.10 | 345,940 | 42 | 445 | 287 |
| Mixed Use (Residential + Community) Scenario (Capped at 99 Units) | 6.10 | 345,940 | 42 | 445 | 99 |
| Community Facility Scenario | 6.10 | 345,887 | 41 | 434 | 0 |
| Mixed Use (Commercial Overlay) Scenario | 5.27 | 306,616 | 14 | 184 | 332 |
| Mixed Use (Commercial Overlay) Scenario (Capped at 99 Units) | 5.27 | 306,616 | 14 | 184 | 99 |
| Single Room Occupancy (SRO) Scenario | 5.17 | 301,457 | 42 | 445 | 878 |
| Maximum Apartment Count Scenario | 5.17 | 301,457 | 42 | 445 | 368 |
| Split Zone Scenario | 5.17 | 301,848 | 14 | 148 | 334 |
| Waterfront Tower Scenario | 5.17 | 301,457 | 42 | 445 | 328 |
| No-Elevator Scenario | 2.16 | 150,018 | 4 | 43 | 127 |
| Maximum Commercial Scenario | 0.25 | 53,814 | 3 | 50 | 0 |
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