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, no card. The preview shows the lot's unused floor area; the report shows the neighbors, the block and the merged building. Full report from $149.
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.
Each adjacent lot with its shared boundary length, existing building area and the floor area it could transfer under a zoning lot merger, quoted at the narrow-street FAR so the figure cannot overstate the envelope. Each one also says what was checked (landmark status, recorded easements, zoning district, owner of record) and what was not. Click a lot on the site map and the number is there.
Built SF against maximum rights for every lot on the tax block, ranked by unused floor area, with the lots most plausibly acquirable flagged.
Per neighbor, choose one of three: take the air rights and the whole property, take just the air rights and leave their building standing, or leave the property out entirely. The engine recomputes total allowable ZFA on the lots you actually take, subtracts the floor area of the buildings that stay, and puts the remainder on the development site with the height and setback rules that apply there.
Landmark and theater sending-site eligibility (ZR §75-42, §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.
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.
A published sample report on a two-lot Bronx assemblage: combined frontage, shared yards, the merged FAR, and every scenario modeled on the combined site with floor plans and 3D massing. The same report you get on your own lots.
How a merger is computed
Per ZR §12-10 (zoning lot), §75-42 and §74-79 (landmark transfers), §81-744 (theater transfers) and the district-specific pools where they apply. Every figure in the report carries its section.
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 and no card. 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 $/SF assumption is yours to bring.
Yes. Start an assemblage: select the adjacent lots on the site map, then per neighbor choose whether you are taking the whole property, only its air rights, or nothing at all. The report treats what you take as one zoning lot with every scenario recomputed. A property you leave out contributes no lot area and no floor area to any figure.
See its unused floor area for free, with no account. The full report adds the neighbors, the block pool and the merged massing: $149, $349 or $499, priced by buildable SF, or Pro at $4,990 a year for 10 reports a month.