159 Ludlow Street
BBL MN-411-19 · Generated April 21, 2026
4,252
buildable SF
8
stories (top)
5
units (top)
86
max height (ft)
11
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
Manhattan / LES, irregular small lot
Auto-generated floorplans
Diagrammatic floor layouts produced by the engine, derived directly from the computed envelope, core requirements, and program. These are massing-grade studies, not construction documents. Architect-grade floorplan synthesis (with per-room layouts, fixture symbols, and code-compliant cores) is in active development.
Cellar · Floor 0
813 GSF · 25'×33' footprint
Ground · Floor 1
813 GSF · 25'×33' footprint
Typical · Floor 2
813 GSF · 25'×33' footprint
Envelope, FAR 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 · UAP (City of Yes): Max Development
6,360
GSF · FAR 5.00
Stacking diagram
8 floors · 86 ft · bar width = floor plate size
The envelope, rule by rule.
Every constraint the engine applied to C4-4A, 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 · C4-4A
Form: Quality Housing. Contextual district: Quality Housing is the only residential form.
What the Code requires for this building.
Chapter 5 and its neighbours, applied to the UAP (City of Yes): Max Development scenario: construction type, egress, elevators, sprinklers, accessibility. This is the part an architect checks first.
1 passenger, 1 stretcher-capable
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
No ULURP, BSA or CPC action required for the modeled scenarios. (E) designation on the lot.
Full section: required procedures, ULURP scope, LPC and (E) designations
Parking
.
Full section: every configuration, cost and its hit to buildable area
Block air rights
Unused development rights across 54 lots on block 00411; the block is 98.9% built out.
Full section: every lot on the block with its unused floor area
Engine validation
0 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: 11 scenarios computed for this lot.
| Scenario | FAR | Buildable SF | Floors | Height (ft) | Units |
|---|---|---|---|---|---|
| UAP (City of Yes): Max Development | 5.00 | 6,360 | 8 | 86 | 5 |
| Max Res + School Construction Bonus | 4.79 | 6,128 | 7 | 85 | 5 |
| All Programs Combined | 4.79 | 6,128 | 7 | 85 | 5 |
| Commercial Overlay | 3.95 | 5,289 | 6 | 70 | 2 |
| Residential + Community Facility | 3.93 | 5,289 | 6 | 70 | 2 |
| Max Commercial | 3.90 | 5,063 | 6 | 71 | n/a |
| Community Facility | 3.90 | 5,063 | 6 | 70 | n/a |
| Shared Housing (SRO) | 3.74 | 4,941 | 6 | 70 | 14 |
| Max Units | 3.74 | 5,063 | 6 | 70 | 6 |
| Max Residential (Quality Housing) | 3.74 | 5,063 | 6 | 70 | 2 |
| 4+1 Penthouse (No Elevator) | 3.55 | 4,875 | 5 | 70 | 2 |
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