1905 3 Avenue, Manhattan 10029 is a 5,664 square foot lot zoned R9. RunEnvelope’s engine finds an as-of-right scheme with homes of 48,460 sf (AIRS Senior Housing (100% Affordable)), against 7,882 sf built on the lot today.
That leaves 40,578 sf more floor area than stands here now, if the existing building were replaced. The largest scheme with homes and no affordability obligation holds 42,593 sf (Commercial Overlay).
City Planning’s PLUTO file lists a residential FAR of 7.52 for this lot, which at 5,664 sf of land is 42,593 sf. The engine’s largest residential-only scheme without an affordability obligation (Shared Housing (SRO)) holds 40,436 sf, 5% less than that simple multiplication suggests. On this lot the building rules, not the FAR, set the limit; the full study shows which one binds.
Quality Housing height limit in R9 on a wide street: 145 ft (185 ft with the affordability preference). From the district’s rule set.
The largest 6 as-of-right schemes RunEnvelope’s engine produced for this lot, by zoning floor area. A full study also models the building itself: floor plates, heights, setbacks, unit mix and parking.
| Scheme | Type | Floor area | FAR | Homes |
|---|---|---|---|---|
| AIRS Senior Housing (100% Affordable) | Income-restricted housing | 48,460 | 8.56 | 47 |
| Commercial Overlay | Mixed use with homes | 42,593 | 7.52 | 43 |
| Shared Housing (SRO) | Shared housing (rooms) | 40,436 | 7.14 | 133 rooms |
| Max Apartments | Housing | 40,436 | 7.14 | 62 |
| Residential + Community Facility | Mixed use with homes | 36,065 | 6.37 | 17 |
| Sky Exposure Plane Option | Housing | 28,996 | 5.12 | 31 |
Floor area is zoning floor area in square feet. Highlighted: the largest scheme with homes. Income-restricted schemes (Universal Affordability Preference, AIRS senior housing) require a share or all of the homes to be affordable. Shared housing counts rooms, not apartments. Schemes that need a landmark transfer of development rights, the FRESH food store bonus or a stack of every program are left off this page; the full study shows them.
As-of-right only: what the Zoning Resolution allows without a variance, special permit or rezoning. Computed by RunEnvelope’s zoning engine on October 25, 2026 from PLUTO 26v2 lot data, in screening mode: the engine uses the City’s recorded lot area and dimensions, not a surveyed lot outline.
This is not a professional opinion, an appraisal or a statement that anything will or should be built here. Existing tenants, leases and the owner’s plans are not part of it.
Why this lot has a page: we publish pages only for lots that clear a set of data quality and headroom tests.
The closest published lots in Manhattan, same zoning district first. All Manhattan lots.