NYC buildability analysis —
see what each lot can actually hold.
PropScope compares built FAR against permitted FAR for every NYC tax lot and surfaces underbuilt parcels directly on the zoning map — so developers and acquisition teams can spot expansion, assemblage, and land plays before anyone else.
What is FAR and why does it matter for NYC investors?
Floor Area Ratio (FAR) is the ratio of a building's total floor area to the size of the land it occupies. In NYC, every zoning district has a maximum FAR that controls how much can be built. A lot in an R6 zone with a 2.43 FAR maximum that only has a one-story building is substantially underbuilt — meaning there's significant unused development capacity.
For acquisition teams and developers, FAR gaps represent some of the highest-conviction signals in the market: lots where current use represents a fraction of what zoning permits are often the best candidates for expansion, air rights plays, assemblage, or replacement development.
FAR gap examples — NYC parcels
How PropScope shows FAR
PropScope reads the built floor area and lot area from MapPLUTO, divides to get the actual FAR, and compares it against the district's permitted maximum. The gap — expressed in floor area and as a percentage of max — is shown inside every property dossier's buildability panel and surfaced on the map as the "Underbuilt" lead preset.
Six buildability signals PropScope surfaces per parcel
FAR gap calculation
Built FAR vs. permitted FAR for the zoning district — the core underbuilt signal, expressed in square feet of unused development potential.
Massing-style estimate
Approximate additional floor area that could theoretically be developed under current zoning — for early-stage sizing, not architectural design.
Lot dimensions
Frontage, depth, and irregular shape flags from MapPLUTO — context for understanding what type of massing could physically fit on the lot.
City of Yes signal
Whether the lot is in a zone that receives as-of-right development bonuses under the 2024 City of Yes zoning amendment.
Assemblage adjacency
Flags when neighboring lots are also underbuilt or vacant — indicating potential to assemble a larger development site across multiple owners.
DOB permit and violation context
Existing permit history and open violations layered into the buildability view — so you know what structural or code issues to factor into a development scenario.
Buildability & FAR questions
What is FAR in NYC real estate?
FAR (Floor Area Ratio) is the ratio of a building's total floor area to the lot size. NYC zoning assigns a maximum FAR to each district. A lot using less than its permitted FAR is underbuilt — meaning there is unused development capacity. PropScope calculates and surfaces this gap for every NYC tax lot.
How do I find underbuilt properties in NYC?
Underbuilt NYC properties can be identified by comparing actual built FAR against the permitted maximum. PropScope automates this using MapPLUTO data and surfaces underbuilt parcels as a map filter and inside each property dossier — showing the FAR gap, estimated additional square footage, and lot context.
What is air rights in NYC?
Air rights in NYC refer to unused development capacity above an existing building or on an underbuilt lot. They can be used for vertical expansion on the same site or transferred to adjacent properties in some zoning contexts. Underbuilt lots with significant FAR gaps are candidates for air rights negotiations or direct development plays.
Is the buildability analysis in PropScope an architectural determination?
No. PropScope buildability analysis is decision-support for screening and prioritization. It uses MapPLUTO FAR data and zoning district rules to estimate development potential — but it is not an architectural design, engineering determination, or entitlement opinion. Every dossier includes a note making these limits explicit.
Find NYC's underbuilt lots before the market does.
FAR analysis, massing signals, and City of Yes overlap — surfaced on the parcel map for every NYC BBL. Open now — start free.