Air rights & transfers of development rights
Unused floor area on the lot, what every neighbor could transfer to it, and what a zoning lot merger unlocks, computed against the Zoning Resolution rather than looked up.
Free to look. No account. The preview shows the lot's unused floor area; the report shows the neighbors, the block and the merged building.
What the engine computes
Free preview
Lot area × the applicable FAR for every permitted use, minus what is already built. The number a buyer, a lender or a neighbor is actually negotiating over.
Every report
Each adjacent lot with its shared boundary length, existing building area and the floor area it could transfer under a zoning lot merger. Click a lot on the site map and the number is there.
Every report
Built SF against maximum rights for every lot on the tax block, ranked by unused floor area, with the lots most plausibly acquirable flagged.
Every report · assemblage
Merge lots, mark which ones keep their building, and the engine recomputes total allowable ZFA, subtracts the kept floor area, and puts the remainder on the development site with the height and setback rules that apply there.
Every report
Landmark and theater sending-site eligibility (ZR 74-79, 81-744), and receiving-site status in the districts with their own pools: Hudson Yards, West Chelsea, Midtown, Theater Subdistrict, Hudson Square, Lower Manhattan and more, with the governing section for each.
Every report · assemblage
Not a total, a building. The assemblage report models every legal scenario on the combined site with per-floor plans and 3D massing, so you can see whether the transferred floor area fits under the height and setback rules before you make the call.
The unused development rights on a zoning lot: the floor area the Zoning Resolution permits minus what is built. They can be used on the lot, moved to an adjacent lot through a zoning lot merger, or, for designated landmarks and theaters, sold to eligible receiving sites through a transfer of development rights.
Yes. Enter any NYC address and the preview shows the lot's allowable floor area, what is built, and the developable remainder, with no account. The neighbor-by-neighbor availability, the block pool, TDR status and the merged massing are in the report, which starts at $149.
No, deliberately. The report states what the code permits and what can be transferred; it makes no representation about $/SF. The valuation tools in the Advanced Suite are where you bring your own assumptions.
Yes. Start an assemblage: select the adjacent lots on the site map, choose which ones keep their existing building, and the report treats the result as one zoning lot with every scenario recomputed.
See its unused floor area for free, then the neighbors in the report.
Check a property