21-15 21 Street, Queens 11101 is a 30,427 square foot lot zoned M1-6A/R10. RunEnvelope’s engine finds an as-of-right scheme with homes of 365,124 sf (Shared Housing (SRO)), against 162,572 sf built on the lot today.
That leaves 202,552 sf more floor area than stands here now, if the existing building were replaced.
City Planning’s PLUTO file lists a residential FAR of 10.00 for this lot, which at 30,427 sf of land is 304,270 sf. The engine’s largest residential-only scheme without an affordability obligation (Shared Housing (SRO)) holds 365,124 sf, 19% more than that simple multiplication suggests.
Quality Housing height limit in M1-6A on a wide street: 245 ft. Quality Housing height limit in R10 on a wide street: 215 ft (235 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 |
|---|---|---|---|---|
| Shared Housing (SRO) | Shared housing (rooms) | 365,124 | 12.00 | 1,265 rooms |
| Max Apartments | Housing | 365,124 | 12.00 | 537 |
| AIRS Senior Housing (100% Affordable) | Income-restricted housing | 365,124 | 12.00 | 465 |
| Waterfront Tower (ZR 62-343) | Housing | 365,124 | 12.00 | 445 |
| Residential + Community Facility | Mixed use with homes | 365,124 | 12.00 | 439 |
| Mixed-Use | Mixed use with homes | 365,124 | 12.00 | 430 |
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 24, 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 Queens, same zoning district first. All Queens lots.