What Can I Build on My Lot in NYC?
Start with an address or BBL, identify the zoning district, and compare FAR with the existing building. Then check site restrictions and zoning-lot history with a qualified professional. A map or FAR gap alone cannot confirm buildability.
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.
Search the free NYRezone map by NYC address or BBL to see recorded zoning fields. Check all districts on a split lot and confirm the current map in ZoLa.
Once you have the code, read its rules: FAR, height limits and how built-out its lots are. Common districts: R3-2, R4, R5, R6, R6A, R7-1, R7A, R8, R3A, R2, or see every NYC zoning district.
Check Your Lot's FAR Allowance
FAR (floor area ratio) is zoning floor area divided by zoning-lot area. At FAR 2.0, a 5,000 sq ft zoning lot corresponds to 10,000 sq ft of zoning floor area before other applicable rules. Zoning floor area is not the same as gross building area. MapPLUTO provides a starting reference; verify the permitted FAR and conditions in the NYC Zoning Resolution.
NYRezone compares recorded built FAR with MapPLUTO residential FAR as a screening score. That gap does not establish the amount you can build or sell as air rights.
Check What's Already Built
Review recorded building area, floors and use, then compare them with a survey and building records. Height, yards, lot coverage, street width and special-district rules can constrain a proposal even when a FAR comparison shows a gap. A tax lot may be part of a larger zoning lot with shared floor area. Read the data sources and screening limits.
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 changed housing rules in December 2024. Eligibility depends on the district and project; do not add a blanket bonus to a MapPLUTO FAR field. For example, Universal Affordability Preference applies in eligible medium- and high-density districts outside Mandatory Inclusionary Housing areas, with affordability requirements on the additional housing. It is not a bonus for every NYC lot.
Check HPD's current inclusionary housing guidance and the adopted zoning text with a qualified professional before applying any program. A screening report does not confirm eligibility or replace that review.
What to bring to a zoning feasibility review
Bring the address and BBL, a current survey if available, the proposed use, and the floor area or unit count you hope to add. Ask the professional to check zoning-lot agreements, existing approvals, landmark and flood constraints, and the bulk rules that apply to your site.
NYRezone uses NYC DCP PLUTO parcel fields as a starting screen. Public datasets can lag changes and do not establish title or approval. The map's Westchester, Suffolk and Nassau layers do not provide NYC zoning or FAR analysis.
Content reviewed October 17, 2026. See the free lookup and $49 report comparison before paying for a report.
Read Next
See the full zoning analysis cost breakdown, see how NYRezone stacks up against ZoLa, RegWatch, and Tectmind, compare R6 vs R6A vs R6B, or read NYRezone vs. hiring an architect to see which step you actually need next.