What Can I Build on My Lot in NYC?
Five checks to run before you spend real money finding out: zoning district, FAR allowance, what's already built, air rights, and City of Yes provisions.
Find Your Zoning District
Every lot in NYC sits inside a zoning district (like R6 or C4-4) that governs what can legally be built there — residential, commercial, or mixed use, and at what density. NYC's free public tool for looking this up is ZoLa (the Zoning & Land Use Map), run by the Department of City Planning.
NYRezone's map and parcel reports surface the zoning district instantly for any lot in the five boroughs, without the manual lookup.
Check Your Lot's FAR Allowance
FAR (floor area ratio) is the maximum square footage a lot is allowed to hold, expressed as a multiple of the lot's area. A 5,000 sq ft lot with a 2.0 FAR can hold up to 10,000 sq ft of building. This number comes from NYC DCP MapPLUTO, the city's parcel database.
Instead of manually subtracting built FAR from allowed FAR, NYRezone computes the unused-FAR gap automatically as the Opportunity Score.
Check What's Already Built
Comparing built FAR against allowed FAR tells you how much upside actually remains on a lot. A lot using 20% of its allowed density has far more room than one already at 95%. This comparison is exactly what the Opportunity Score measures — see the methodology page for the exact formula.
Check Air Rights / Transferable Development Rights
Unused development rights on adjacent or nearby lots can sometimes be purchased or transferred, in eligible zoning contexts — this is what people mean by "air rights." It's a specialized area of NYC zoning that needs a zoning attorney to confirm eligibility and structure the transaction. NYRezone's report is a starting screen for whether a lot's own FAR is underused — it is not a TDR feasibility study.
Check City of Yes Provisions That Might Apply
City of Yes for Housing Opportunity, adopted December 2024, is the largest zoning reform in NYC history. Depending on the lot, provisions like the Universal Affordability Preference (+20% FAR for 100% affordable projects), Town Center Zoning, Transit-Oriented Development bonuses, parking elimination, ADUs, and office-to-residential conversion eligibility can all change what's actually buildable.
See the methodology page for the full breakdown of which provisions NYRezone checks and how.
Read Next
See the full zoning analysis cost breakdown, or read NYRezone vs. hiring an architect to see which step you actually need next.