Public Ground

Method

How every number is made

Each figure on this site is computed from a named public dataset, a section of the Zoning Resolution, or a declared assumption listed on this page. Nothing is estimated by a model, and the same inputs always produce the same outputs.

Datasets

Every input is archived as retrieved, with its SHA-256, so any figure can be traced to the exact data behind it.

DatasetPublisherVersion or as ofRetrievedRecordsSHA-256
City Owned and Leased Properties (COLP)One record per agency use of a tax lot; join to MapPLUTO on MAPBBL.NYC Department of City Planning20260430 · Jun 2, 2026Sep 25, 202617,2984eab5154033d
Digital City Map street centerlinesMapped street centerlines with names and mapped widths (Streetwidth) around each site.NYC Department of City PlanningDec 1, 2025Sep 25, 20269,43327b0e93660f5
Digital City Map: water edge linesFeat_Type 'Water_edge' lines of the Digital City Map, used with the borough outlines as the shoreline for the waterfront block test.NYC Department of City PlanningDec 1, 2025Sep 25, 202647191280920bacd
Borough boundaries (clipped to shoreline)NYC Department of City PlanningAug 21, 2026Sep 25, 20265a9460cb9e95e
(E) DesignationsE-designation records for site BBLs, with hazardous materials, air quality and noise flags.NYC Department of City Planning20260707 · Aug 12, 2026Sep 25, 20261345eedc5d50021
Mandatory Inclusionary Housing areasDCP: provided for reference only; Appendix F of the Zoning Resolution governs.NYC Department of City Planning202607 · Sep 9, 2026Sep 25, 20262877be6ea6efaa9
Commercial Overlay Districts (NYCO)C1 and C2 overlays mapped within residence districts.NYC Department of City Planning202607 · Aug 17, 2026Sep 25, 20269,6274336bcd6f54a
Special Purpose District Subdistricts (NYSP_SD)Internal subdistricts and subareas of special purpose districts.NYC Department of City Planning202607 · Aug 17, 2026Sep 25, 2026336d92eb6ede5db
Zoning districts (NYZD)Zoning district polygons intersecting each site lot's bounding box.NYC Department of City PlanningAug 17, 2026Sep 25, 2026734538f8fb924a1
Zoning districts (NYZD), split City-owned lotsZoning district polygons over each split-zoned City-owned lot, for portion-by-portion floor area in the leftovers ledger.NYC Department of City PlanningAug 17, 2026Sep 25, 20269570a1a5b0c61fb
NYC Stormwater Flood Map: Extreme stormwater flood with 2080 sea level riseFlooding categories (1 nuisance 4 in to 1 ft; 2 deep and contiguous 1 ft+; 3 future high tides) intersecting each site lot.NYC Department of Environmental Protection, via NYC Department of City PlanningSep 8, 2025Sep 25, 2026482f7d9f19622fa
NYC Stormwater Flood Map: Extreme stormwater flood with 2080 sea level rise: area of each lot in each categoryArea (sq ft) of each site lot polygon in each zone or category, measured on 0.25 ft strips, and whether that part is anywhere 5 ft wide.NYC Department of Environmental Protection, via NYC Department of City PlanningSep 8, 2025Sep 25, 20264825d04dc4e28a2
NYC Stormwater Flood Map: Moderate stormwater flood with 2050 sea level riseFlooding categories (1 nuisance 4 in to 1 ft; 2 deep and contiguous 1 ft+; 3 future high tides) intersecting each site lot.NYC Department of Environmental Protection, via NYC Department of City PlanningSep 8, 2025Sep 25, 2026482f6b1da1e7b64
NYC Stormwater Flood Map: Moderate stormwater flood with 2050 sea level rise: area of each lot in each categoryArea (sq ft) of each site lot polygon in each zone or category, measured on 0.25 ft strips, and whether that part is anywhere 5 ft wide.NYC Department of Environmental Protection, via NYC Department of City PlanningSep 8, 2025Sep 25, 20264827d09c59b5a1d
NYC Stormwater Flood Map: Moderate stormwater flood with current sea levelsFlooding categories (1 nuisance 4 in to 1 ft; 2 deep and contiguous 1 ft+; 3 future high tides) intersecting each site lot.NYC Department of Environmental Protection, via NYC Department of City PlanningSep 8, 2025Sep 25, 2026482b09e095efee2
FEMA 2007 effective Flood Insurance Rate Map: area of each lot in each zoneArea (sq ft) of each site lot polygon in each zone or category, measured on 0.25 ft strips, and whether that part is anywhere 5 ft wide.FEMA, via NYC Department of City PlanningMar 16, 2026Sep 25, 2026482be13a2d6d12a
FEMA 2015 Preliminary Flood Insurance Rate Map (flood hazard zones)Flood hazard zones intersecting each site lot (FLD_ZONE, SFHA_TF). DCP copy of FEMA's layer; FEMA's service is authoritative.FEMA, via NYC Department of City Planning360497_20150130 · Mar 16, 2026Sep 25, 20264829dcde63b5d3e
FEMA 2015 Preliminary Flood Insurance Rate Map: area of each lot in each zoneArea (sq ft) of each site lot polygon in each zone or category, measured on 0.25 ft strips, and whether that part is anywhere 5 ft wide.FEMA, via NYC Department of City Planning360497_20150130 · Mar 16, 2026Sep 25, 2026482f782ff28c780
LIFT Tracker (Land Inventory Fast Track)Normalized site table with BBL resolution notes; raw layer snapshot in data/raw/lift/.NYC Mayor's OfficeJul 29, 2026Sep 23, 2026120bca529b55939
MapPLUTOTax lots for every BBL on the LIFT site list (attributes + polygons, EPSG:2263).NYC Department of City Planning26v2 · Sep 9, 2026Sep 25, 20264827a2e7b16eab5
MapPLUTO (lots on blocks with city-owned land)Every lot on any tax block containing a city-owned lot, for adjacency.NYC Department of City Planning26v2Sep 25, 2026150,8509f3b9820a46f
MapPLUTO (city-owned lots)All lots with OwnerType 'C' (city ownership).NYC Department of City Planning26v2 · Sep 9, 2026Sep 25, 202612,8301c7d23667685
MapPLUTO (plate context)Lots intersecting each site's plate envelope, for drawing neighbors.NYC Department of City Planning26v2Sep 25, 202669,7760127ee5a84c3
MTA Subway StationsMetropolitan Transportation AuthoritySep 25, 2026Sep 25, 20264969d133ed4783a
Zoning Resolution of the City of New YorkRules pack: 248 district entries authored from the text; see below.NYC Department of City PlanningText as of Sep 10, 2026Sep 23, 2026248

Where each project is

The LIFT tracker gives each project a map point, an address and a home count, but no tax lots. Each record is placed on tax lots in one of these ways, the most reliable first.

Named in a City document (85 sites)
A City Planning Commission report, an HPD notice in the City Record, HPD's Local Law 125 report on land disposition, or a Department of Buildings filing names the project's block and lots. The site uses those lots, and its page cites the document.
The tracker's map point (15 sites)
Otherwise the site is the MapPLUTO tax lot under the tracker's point. The page says so: the lot may be only part of the project's land, or more than it, and the figures are for the lot shown.
The tracker's address (2 sites)
Where the point falls on no tax lot, or on an unrelated private lot while the tracker's own address and owner match a City lot, the address places the project. The page gives the reason.
Not placed (6 records)
Where no lot can be confirmed and the point is on the wrong land, the record has no figures. It is listed under open issues with the reason.

Tracker records on the same lots, such as phases of one project, are shown as one site and counted once.

What City documents say. On 100 sites, the page lists facts from City documents that bear on the figures: a building that stays on the lot, an approval that governs the site, a pending rezoning, a deed restriction, the part of a lot the project uses, and where a document accounts for the tracker's home count. Each fact names its document and date, and each quote was checked against a saved copy of the document. The facts speak as of their documents' dates. The file is data/manual/site-documents.json.

Floor area

Floor area is computed exactly from rules. It is the one figure the Zoning Resolution fixes.

Zoning floor area = lot area × maximum floor area ratio (FAR)

Lot area is MapPLUTO's LotArea (Department of Finance), except where a City document for the project gives a lot's area and MapPLUTO's disagrees with the rule that governs it; the site page then says so and cites it. On a waterfront lot the upland lot, landward of the bulkhead line, counts (ZR 12-10, 62-31), so a tax lot that runs out to the bulkhead line keeps its recorded area. In the Special Inwood District, lot area seaward of the shoreline does not count (ZR 142-21); where no City document gives the upland area, it is estimated from the share of the tax map's lot outline inside DCP's shoreline at mean high tide. The maximum FAR comes from the rules pack: one entry per zoning district, authored from the Zoning Resolution with a section number and a verbatim quote for every value. Commercial districts take the residential rules of their residential equivalent (ZR 34-112); paired M1/R districts take the paired residence district (ZR 123-622). The code contains no district-specific logic; it reads the pack.

Two figures are shown where the district has both: the standard maximum, and the maximum for qualifying affordable or senior housing (City of Yes for Housing Opportunity, including the Universal Affordability Preference). Split lots are computed portion by portion, using DCP's zoning district polygons to measure each district's share of the lot.

Some limits depend on conditions. Each condition key in the pack has a declared treatment: settled from public data (for example, whether part of a lot is within 100 feet of a wide street, from the Digital City Map's mapped street widths), set aside as an optional alternative the baseline doesn't assume, or shown as a span when public data cannot settle it. Of the 47 residence districts, 42 have residential values verified against both the text and MapPLUTO (the rest are districts no lot is mapped in, so MapPLUTO cannot confirm them); of the 143 commercial and mixed districts with a residential equivalent, 133 are verified.

The conditions settled from public data, and how:

Within 100 feet of a wide street
Each Digital City Map centerline with a mapped width of 75 feet or more is widened by half its width either side to approximate the street bed, and the bed is buffered by 100 feet. The share of the lot inside the buffer takes the wide-street ratio, and the rest takes the other ratio. On a lot split between zoning districts, each district's part is measured on its own ground. The Digital City Map's streets count, whether built or not, and so do its ways on record, some of which are streets under ZR 12-10 (d); former streets do not. If a nearby width is not a number, the test is left open, unless a City document for the project gives the width; the site page then cites it. A City document can also show that a way is a private road or driveway, which is not a street (ZR 12-10), or that it changes a street's width only for part of its length; the rest keeps the map's width.
Commercial overlays
On the part of a lot under a C1 or C2 overlay, the community facility ratio is the overlay's, set by the residence district it is mapped within (ZR 33-121). DCP's overlay polygons give the share. Residential floor area keeps the residence district's rules, except in R1 through R5 districts, where ZR 34-111 gives an overlay R5 rules on a qualifying residential site in the Greater Transit Zone, and R3-2 rules within R1 or R2 on other sites. That exception is not modeled; the build checks every overlay lot and warns where it could apply.
Outside a Mandatory Inclusionary Housing area
Measured on the part of the lot outside DCP's MIH area polygons, so a lot the MIH line crosses is split, as ZR 23-04 splits a zoning lot "subject to different bulk regulations for different portions" (ZR 77-22). MapPLUTO's MIH fields mark any lot the area touches, so they are not used for this. A part outside the polygons that is under 1% of the site, or nowhere 5 feet wide, is treated as a drawing difference, not as land outside the area. DCP publishes the polygons for reference and says Appendix F of the Zoning Resolution governs.
Qualifying residential site (ZR 12-10)
Tested path by path on each zoning lot, because the definition applies to zoning lots, not tax lots: its area, its frontage on a wide street, whether it has a building, and whether it is in the Greater Transit Zone are those of all its tax lots together. A zoning lot the Greater Transit Zone boundary crosses is left open. It is settled as met when the lot alone has 5,000 sq ft, lies in the Greater Transit Zone and fronts a wide street. It is ruled out only when every path is ruled out. Otherwise the figure is a span, and the site page names the open path: for example, qualifying senior housing in R3-2, R4, R5 and R5B, or the mapping of a C1, C2 or C4 district along the block. Homes assume housing other than senior housing, so where only senior housing could reach the higher figure, the homes range uses the lower one and a note gives the senior housing figure.
Waterfront block (ZR 62-11)
Ruled out when the tax block is more than 1,000 feet from the water. The water's edge here is DCP's borough boundaries clipped to the shoreline, plus the City Map's water edge lines, which follow canals and creeks such as the Gowanus Canal. Enclosed lakes and ponds are left out, since the Zoning Resolution measures from the mean high water line. Streams that are not tidal may remain; they can only send a block to case review, never rule one out. A block nearer than 1,000 feet is also ruled out when it does not reach the water's edge, has no park at the water's edge next to it and is not bounded by a paper street. Otherwise it is left for case review, unless a City document for the project settles it. On a waterfront block, districts without a letter suffix drop their rules for land within 100 feet of a wide street (ZR 62-322), so the waterfront ratio replaces the wide- and narrow-street ratios.

Zoning lots. Lots of a site form one zoning lot when they are on the same tax block and share at least 10 feet of lot line, following ZR 12-10: "contiguous for a minimum of 10 linear feet, located within a single block". The tax block stands in for the block, which the Zoning Resolution bounds by mapped streets, built or not. A site of separate parcels is several zoning lots, and the qualifying residential site test, the dwelling unit factor and building-type limits apply to each.

Slivers. A zoning district that covers under 1% of a lot, or is nowhere 5 feet wide on it, is treated as a drawing artifact and its area goes to the lot's other districts, unless it is the lot's largest district. The same rule applies to a commercial overlay, measured on the residence district's part of the lot: an overlay part under 1% of it, or nowhere 5 feet wide, is left out, and a part outside the overlay that small is counted as under it.

Where a district is not named in the table row it uses, it takes the row of its unsuffixed district under ZR 11-25, and the source note says so. Each floor-area formula is written portion by portion with unrounded ratios, so the arithmetic reproduces the figure.

MapPLUTO's own FAR fields are used only as a cross-check. They are district-level maxima and do not apply wide-street rules or special districts, so where they differ, the Zoning Resolution governs and the difference is listed under open issues.

Condition policy (23 conditions)
ConditionTreatmentWhy
within 100 feet of a wide streetSettled from dataThe ZR test is geometric and resolvable from DCP Digital City Map street widths, as decided on 2026-09-24.
not within 100 feet of a wide streetSettled from dataIt is the exact geometric complement of the within-100-feet band, so it resolves from the same computation.
outside a Mandatory Inclusionary Housing area and within 100 feet of a wide street (UAP or senior housing)Settled from dataBoth geographic parts are resolvable from DCP MIH polygons and the wide-street band, and the program part (UAP or qualifying senior housing) is already implied by the affordable column in which the key is used.
qualifying residential site (R1 to R5)Settled from dataThe transit, lot-size and frontage path is resolvable from data, but the existing-community-facility paths are not (PLUTO has no community facility floor-area field), so the result is true, false or unknown per lot.
standard zoning lot of 4,000 square feet or more (per-unit cap)Settled from dataLot area is in PLUTO and "standard zoning lot" is the complement of qualifying residential site, so it resolves wherever QRS status resolves.
south of Avenue H in Brooklyn community districts 11, 14 and 15Settled from dataCommunity district is a PLUTO field. In Community District 15 every R1 to R3 lot lies south of Avenue H, so the condition holds there; Community District 14, which Avenue H crosses, is left unknown, since the side-of-line test against the Avenue H centerline is not applied.
optional predominantly built-up area provisions (R4, R5)Set aside (optional alternative)It is an optional alternative regime whose eligibility also rests on a block-frontage condition as of October 21, 1987 that public data cannot establish.
optional Brooklyn community district 12 provisions, corner lotSet aside (optional alternative)It is optional and limited to buildings used only as one- to three-family homes, a building type the applicant elects.
optional Brooklyn community district 12 provisions, interior or through lotSet aside (optional alternative)It is optional and limited to buildings used only as one- to three-family homes, a building type the applicant elects.
optional sky exposure plane (height factor) buildingSet aside (optional alternative)It is an optional alternative bulk regime; it was decided on 2026-09-24 that the 2.43 R6 value is not the baseline.
on a waterfront blockSettled from dataA distance screen reliably rules out lots far from the water, but near the water the status depends on block, park, unimproved-street and narrow-waterway facts that need case review.
R1 or R2 community facility floor area capped at the residential floor areaSettled from dataFor as-of-right community facility uses the cap always applies, and it bites (0.75) exactly when the lot is not a qualifying residential site (whose residential FAR is 1.00).
non-profit institution with sleeping accommodations or long-term care facilitySet aside (optional alternative)It applies only to a specific community facility use the applicant would choose, not to the site generally.
mixed residential and community facility building above the Column A ratioSet aside (optional alternative)It depends on the building program (a mixed building above a size threshold) that the applicant elects.
community-facility-only zoning lot in an R8B district in Manhattan community district 8Set aside (optional alternative)The geography is resolvable but the value requires an all-community-facility program, which is an applicant election.
qualifying senior housingSet aside (optional alternative)It is a housing program the applicant chooses; here it only removes the dwelling unit factor.
one- or two-family detached, semi-detached or zero lot line buildingSet aside (optional alternative)It is a building type the applicant elects; the unconditional 35-ft maximum in R3-2 and R4 holds either way.
other residences (flat-roof envelope) in R3-2 and R4Set aside (optional alternative)It is a building type the applicant elects, and its 35-ft value equals the unconditional maximum.
special density area (Manhattan Core or Special Downtown Brooklyn District)Settled from dataBoth geographies are identifiable from PLUTO community district and special-district fields or DCP polygons.
Floor area limited to qualifying uses in an M2 or M3 A-suffix districtSet aside (optional alternative)The higher 43-133 FAR applies only to floor area devoted to qualifying uses (with a ground-floor allocation requirement on lots of 5,000 sq ft or more), so it is an elective use-mix alternative; the unconditional value is the other-uses FAR.
M1-2 footnote area in Queens Community District 1 (4.0 FAR for referenced commercial and manufacturing uses)Set aside (optional alternative)The extra floor area is limited to referenced commercial and manufacturing uses in one street-offset polygon that no MapPLUTO field or supported resolver can reproduce; residences are not permitted in M1-2, so the 2.00 baseline applies and the 4.0 is set aside as a special-use alternative.
Lot is in the Special Downtown Brooklyn DistrictSettled from data101-21 sets the 12.0 commercial and community facility FAR for C6-4.5 within the Special Downtown Brooklyn District, which MapPLUTO records as SPDist code 'DB'.
Lot is in the Special Midtown DistrictSettled from data81-211 row A and 81-241 set the FAR of C5-P, C5-2.5, C6-4.5, C6-5.5, C6-6.5 and C6-7T only within the Special Midtown District, which MapPLUTO records as SPDist code 'MiD'.

The full rules pack, district by district

Special districts

Special purpose districts can replace the floor area rules of the district underneath. For each special district on the ledger, its chapter of the Zoning Resolution was read and the result recorded as one of three things: its own floor area ratios (applied, with the section quoted), a finding that it does not change floor area, or a note that it is not yet settled. A rule for a subdistrict or subarea applies to the part of the lot inside DCP's subdistrict map. Bonuses that need a discretionary approval are left out, as they are in the base rules.

Special districtFloor areaWhat it doesLedger sites
Special Atlantic Avenue Mixed Use District (AAM)Does not change floor areaKeeps the maximum floor area ratio for each use and sets the total for buildings mixing residential and non-residential uses in M1A pairings (5.0 in M1-2A/R6A); a public plaza bonus needs a City Planning Commission authorization. ZR 146-2114, 5
Special Clinton District (CL)Sets its own floor area in some subareasChanges FAR in the Preservation Area and a few other areas, but its rules do not apply in the Excluded Areas listed in 96-80, which include the blocks between West 50th and West 56th Streets from Tenth to Eleventh Avenue. ZR 96-8041
Special Coastal Risk District 2 (Hamilton Beach, Queens) (CR-2)Sets its own floor areaDoes not change the FAR tables but removes the qualifying-residential-site FAR and qualifying senior housing, and limits housing to one- or two-family detached homes; in R3A a two-family home needs a zoning lot at least 40 ft wide. ZR 137-2194 (rules applied)
Special Coastal Risk District 4 (Gerritsen Beach, Brooklyn) (CR-4)Sets its own floor areaDoes not change the FAR tables but removes the qualifying-residential-site FAR and qualifying senior housing, and limits housing to one-family homes on lots under 3,000 sq ft and one- or two-family homes on larger lots. ZR 137-2195 (rules applied)
Special Coastal Risk District 5 (Edgemere, Queens) (CR-5)Sets its own floor areaDoes not change the FAR tables but removes the qualifying-residential-site FAR and qualifying senior housing, and limits housing to detached one-family homes (R3A, and R4-1 lots under 25 ft wide) or one- or two-family detached homes (R4-1 lots 25 ft or wider). ZR 137-2194 (rules applied)
Special College Point District (CP)Sets its own floor areaCaps commercial, community facility and manufacturing floor area at 1.0 FAR, except on certain M2-1 lots south of 30th Avenue; it adds no residential use. ZR 126-22120 (rules applied)
Special Coney Island District (CI)Sets its own floor area in some subareasSets residential FAR by parcel in Coney West (4.8/5.8 on Parcels A to D, 4.6/5.5 on Parcels E and F) and caps community facilities at 2.0 in Coney West and Coney North. ZR 131-3043 (rules applied), 44 (rules applied)
Special Downtown Brooklyn District (DB)Sets its own floor areaSets FAR changes by zoning district; in C6-12 the underlying rules apply, except that a 'large qualifying site' may reach 19.0 FAR for affordable or senior housing, with a 23.0 total. ZR 101-2119 (rules applied)
Special Downtown Jamaica District (DJ)Sets its own floor area in some subareasKeeps underlying residential FAR everywhere except that sky exposure plane buildings are barred and C6-3 in the Core Subdistrict is treated as R9-1; it changes commercial FAR in C6-3 and C6-4, not community facility FAR. ZR 115-2199, 100, 101, 102
Special East Harlem Corridors District (EHC)Sets its own floor area in some subareasIn the commercial and paired districts shown on its Map 2, affordable housing gets the FAR written on the map (8.5, 9.0 or 10.0) and other housing gets a reduced figure from a table; residence districts without a commercial overlay keep the underlying FAR. ZR 138-211Some rules unverified27
Special Gowanus Mixed Use District (G)Sets its own floor areaReplaces floor area limits with its own table; in M1-4/R7-2 an MIH site may reach 4.4 residential FAR and community facilities 4.0, and M1-4 community facilities are 3.6 (Subarea B1) or 2.7 (Subarea B2). ZR 139-21159 (rules applied)
Special Harlem River Waterfront District (HRW)Sets its own floor area in some subareasIn the Core Subdistrict housing is capped at 3.33 FAR, or 4.0 with affordable or senior housing; in the North Subdistrict the waterfront floor area rules apply with a 4.6 cap for any zoning lot. ZR 87-2032 (rules applied), 47 (rules applied)
Special Hillsides Preservation District (HS)Does not change floor areaRegulates lot coverage, height, grading and trees, and on steep (Tier II) sites excludes private roads from lot area; it does not change floor area ratios, but community facility uses anywhere in the district need a City Planning Commission authorization (ZR 119-02). ZR 119-0238, 68
Special Inwood District (IN)Sets its own floor area in some subareasIn Subareas A2, A3 and B1, lots that are not shoreline adjacent lots are capped at 4.6 residential FAR; shoreline adjacent lots keep the 23-22 affordable FAR. ZR 142-2275 (rules applied)
Special Jerome Corridor District (J)Sets its own floor area in some subareasIn R8A districts within 100 feet of a wide street and outside Mandatory Inclusionary Housing areas, the R8 wide-street floor area rules apply (7.20, or 8.64 with UAP or senior housing) instead of R8A's 6.02 and 7.20. ZR 141-226 (rules applied)
Special Long Island City Mixed Use District (LIC)Sets its own floor area in some subareasIn the Northern Hunters Point Waterfront Subdistrict, Subareas A to F each have their own maximum FARs for housing, affordable housing, community facilities and commercial uses, which replace the underlying district's figures. ZR 117-32120 (rules applied), 77 (rules applied)
Special Lower Manhattan District (LM)Sets its own floor areaSets its own basic maximum FARs by zoning district in a table; in R8 that is 6.02 for standard residences and 7.2 for affordable or senior housing everywhere, so the higher R8 figures near wide streets do not apply. ZR 91-211 (rules applied)
Special Mixed Use District - 7 (Morrisania, The Bronx) (MX-7)Does not change floor areaFollows the general Special Mixed Use District rules, which give paired M1/R districts the floor area of the paired residence district; the figures above already apply them, and MX-7 has no floor area rules of its own. ZR 123-9084
Special Mixed Use District - 10 (Atlantic and Howard Avenues, Brooklyn) (MX-10)Does not change floor areaFollows the general Special Mixed Use District rules, which give paired M1/R districts the floor area of the paired residence district; the figures above already apply them, and MX-10 has no floor area rules of its own. ZR 123-9045
Special Mixed Use District - 17 (Hunts Point, The Bronx) (MX-17)Does not change floor areaFollows the general Special Mixed Use District rules, which the figures above already apply; MX-17 has no floor area rules of its own. ZR 123-9090
Special Mixed Use District - 18 (Mott Haven, The Bronx) (MX-18)Does not change floor areaFollows the general Special Mixed Use District rules, which the figures above already apply; MX-18 has no floor area rules of its own. ZR 123-9015
Special Mixed Use District - 21 (Arverne, Queens) (MX-21)Does not change floor areaFollows the general Special Mixed Use District rules, which the figures above already apply; MX-21 has no floor area rules of its own. ZR 123-9026
Special Mixed Use District - 30 (Kingsbridge Heights, The Bronx) (MX-30)Does not change floor areaFollows the general Special Mixed Use District rules, which the figures above already apply; MX-30 has no floor area rules of its own. ZR 123-9074
Special South Richmond Development District (SRD)Does not change floor areaRegulates open space, trees, housing type, minimum lot size and yards; it does not change residential or community facility FAR ratios (it only removes two community facility yard bonuses that the rules pack does not model). ZR 107-4096
Special Southern Hunters Point District (SHP)Sets its own floor area in some subareasSets the standard residential FAR for each East River parcel (12.0 on Parcels A, D, E and G); the affordable FAR is given only for Parcels B, C and F, so on D and E the R10 affordable figure of 12.0 applies. ZR 125-2169 (rules applied), 70 (rules applied)
Special St. George District (SG)Sets its own floor area in some subareasChanges FAR only for C4-2 districts in the Upland Subdistrict; elsewhere, including the M1-1 North Waterfront Subdistrict, the underlying FAR applies and no residential use is added. ZR 128-2087
Special Transit Land Use District (TA)Does not change floor areaRequires an easement for subway access on lots near certain stations; it does not change floor area ratios, and the easement space is not counted as floor area. ZR 95-0727
Special West Chelsea District (WCh)Not yet determinedNot yet reviewed; figures on these sites use the underlying district's rules.119
Special Willets Point District (WP)Sets its own floor areaReplaces the underlying bulk rules: zoning lots under 200,000 sq ft are capped at 2.0 FAR (2.4 for affordable or senior housing); larger lots have total-FAR caps by area and location, with 120 percent of the cap for affordable or senior housing. ZR 124-20115 (rules applied), 116 (rules applied), 117 (rules applied)

An asterisk marks a site where the special district's own floor area rules are applied. The leftovers ledger uses the underlying district's rules throughout and labels rows in a special district.

Homes, as a range

Home counts cannot be computed exactly from rules. They depend on design choices, so there is a low, base and high case, never a single number.

Homes = floor area × efficiency ÷ average home size

  • Low pairs the lowest efficiency with the largest average home; high pairs the highest efficiency with the smallest.
  • Homes are computed from the affordability-linked floor area where the district has one (these are City sites for affordable housing), else the standard floor area.
  • Every case is capped by the Zoning Resolution's dwelling unit factor of 680 (ZR 23-52): at most ⌊floor area ÷ 680 + 0.25⌋ homes on each zoning lot (see zoning lots); a site made of separate parcels is capped parcel by parcel. The factor does not apply in special density areas (Manhattan Community Districts 1–8 and the Special Downtown Brooklyn District) or to qualifying senior housing, so a senior building could hold more homes than the range shows where the cap binds.
  • Rounding for display widens the range and never narrows it: under 20 homes, exact; otherwise the low bound rounds down and the high bound rounds up to the nearest 5, but never above the most homes the Zoning Resolution allows there. Where even the low case is held to that most, it is shown exactly.

For reference, DCP's environmental reviews convert residential floor area to homes at 850 square feet of floor area per home in recent neighborhood rezonings. The low case works out to about 855.

Assumptions

Edit one file (data/assumptions.json) and every page updates on the next build.

Building efficiency

0.7 · 0.8 · 0.85

Net dwelling-unit area (HPD 'dwelling unit area', measured inside the unit's perimeter walls) divided by residential zoning floor area (ZR 'floor area'). It is a declared assumption: no City agency publishes this ratio.

  • 2025 HCR Design Guidelines, PDF p. 40, Sec. 3.4.1a 'Overall Building Efficiency', Table 3.4.1Residential common space must comply with the maximum percentages noted in Table 3.4.1. ... Allowable Residential Common Space 25% 35% N/A ... Projects located in New York City +5% +5% N/A
  • 2025 HCR Design Guidelines, PDF p. 40, Sec. 3.4.1Residential common space is defined as all common areas in the residential project funded by HCR that are not within or dedicated to dwelling units (i.e., corridors, lobbies, utility rooms, manager's office, laundry rooms, community rooms, shared mechanical rooms, etc.).
  • Market & Financial Study: NYC Mandatory Inclusionary Housing (BAE Urban Economics, BJH Advisors, James Lima Planning + Development), PDF p. 68 (printed p. 64), Appendix C, Table C-1 'Developer Interview Summary'Loss Factor 15% 20% 15% (2) 19-20% 15-20%
  • Market & Financial Study: NYC Mandatory Inclusionary Housing, PDF p. 41 (printed p. 37), 'Zoning and Floor Area Ratio'The gross square footage figures for each zoning classification were also inflated by 10 percent from ZFA in order to account for floor space exempted from the definition of FAR (this includes mechanical space and certain other exempt spaces). Architects interviewed by DCP suggested this 10 percent loss factor.
  • HPD Design Guidelines for New Construction 2026, PDF p. 28, 'Unit Area Calculation'Dwelling unit area is measured within the perimeter walls, from the finished face of all exterior walls and demising partitions.

Average home size (net)

514 · 553 · 599 sq ft

HPD's target net areas by bedroom count, weighted by HPD's own bedroom mix for 100% affordable new construction.

Practical lot screen

18 ft frontage · 40 ft depth · 2,000 sq ft

A lot below any of these is flagged as possibly too small for a practical building alone. A screen for practicality, not legality: ZR 23-10 exempts lots that existed on December 5, 2024. The depth threshold is a declared assumption.

  • Zoning Resolution 23-11 (R1-R5) Lot Area and Lot Width Regulations, ZR 23-11 table, last rowIn the districts indicated, no residence shall be permitted on a zoning lot with a total lot area or lot width less than as set forth in the following table: ... Other residences, where permitted | R1 - R5 | 1,700 | 18
  • Zoning Resolution 23-12 (R6-R12) Lot Area and Lot Width Regulations, ZR 23-12 tableSingle- or two-family detached or zero lot line | R6 - R12 | 2,375 | 25 ... Other residences | R6 - R12 | 1,700 | 18
  • Zoning Resolution 23-10, ZR 23-10However, such lot area and lot width regulations shall not apply to zoning lots in existence on December 5, 2024, where the lot area or lot width was less than the prescribed minimums of such Sections, and after December 5, 2024, such lot area or lot width has not decreased.
  • SoHo/NoHo Neighborhood Plan FEIS, Chapter 1, PDF p. 34 (printed p. 1-29), 'Potential Development Sites'Lots with slightly irregular shapes or challenging configurations (overly narrow, deep), small (generally between 1,700 sf and 2,000 sf in lot area), or encumbrances which would make development more difficult will be considered potential development sites in the EIS.
  • Zoning Resolution 23-342 Rear yard requirements, ZR 23-342, 'Shallow lots'For such shallow interior lots, or portions thereof, the depth of a required rear yard set forth for standard lots may be reduced by six inches for each foot by which the depth of a zoning lot, or portion thereof, is less than 95 feet. However, in no event shall the minimum depth of a required yard, or portion thereof, be reduced to less than 10 feet.
  • CEQR Technical Manual, Chapter 2: Establishing the Analysis Framework, PDF p. 6 (printed p. 2-5), 'Soft Site Criteria'A small lot is often defined for this purpose as 5,000 square feet or less, but the lot size criteria is dependent on neighborhood specific trends, and common development sizes in the study area should be examined prior to establishing this criteria.

Orphan lot screen

under 1,700 sq ft · under 18 ft frontage · no frontage

No frontage means MapPLUTO lot type 6 (“Interior lot”) or 8 (“Alley lot”). Lot type 9 is submerged land, not an interior lot.

  • PLUTO Data Dictionary, August 2026 (26v2), PDF pp. 31-32, 'LOT TYPE (LotType)'6 Interior lot – a tax lot that has no street frontage ... 8 Alley lot – a tax lot that is too narrow to accommodate a building. The lot is usually 12 feet or less in width. 9 Submerged land lot – a tax lot that is totally or almost completely submerged
  • PLUTO Data Dictionary, August 2026 (26v2), PDF p. 31, 'LOT TYPE (LotType)'CAMA may contain multiple lot types for a tax lot. For instance, a lot may be both a corner lot and waterfront lot. DCP assigns LOT TYPE by taking the lowest CAMA lot type for the tax lot, with the exception of LOT TYPE 5, which is only assigned if the lot has no other lot types in CAMA.
  • NY General City Law Sec. 36, GCL 36No permit for the erection of any building shall be issued unless a street or highway giving access to such proposed structure has been duly placed on the official map or plan
  • Zoning Resolution 23-11 / 23-12, ZR 23-12 tableOther residences | R6 - R12 | 1,700 | 18
  • Audit Report on the Development of City-Owned Vacant Lots by HPD (FM14-112A), HPD response, PDF p. 6 (HPD response letter as quoted in the audit report; repeated on PDF p. 9)Approximately 310 have major development challenges – they are in flood/hurricane danger zones, for example, or have severe infrastructure deficiencies. . . . Over 150 of these properties are better suited for non-residential uses. . . . Approximately 670 of these properties are suitable and feasible for residential development.

Adjacency

≥ 5 ft shared boundary

Two tax lots are treated as adjacent when their Digital Tax Map polygons share at least 5 feet of boundary, measured with a 0.5-foot tolerance for digitizing noise. A shared corner point is not adjacency. Values are a declared assumption, chosen so a lot line shared along a typical 20-25 ft frontage or rear line counts and a touching corner does not.

What binds first

Each site names one binding constraint: the first of these that applies, in this order. Where a City document for the project sets a tighter limit (an urban renewal plan or a permit, for example), the site page names that instead and cites it, unless the site needs a rezoning.

  1. Needs a rezoning. Current zoning allows no homes anywhere on the site: a manufacturing district, or land mapped as a public park.
  2. Lot shape. A lot under the practical-lot screen above, or with no street frontage.
  3. Flood hazard. Part of the site in the 1% annual chance floodplain on FEMA's 2015 Preliminary FIRM (used by the NYC Building Code) or the effective 2007 FIRM. A floodplain overlap nowhere 5 feet wide, or under 1% of the site, is noted but does not bind. Stormwater flood scenarios are flagged but do not bind.
  4. Landmark review. An individual landmark on the site, or the site in an LPC historic district.
  5. Split zoning. The site lies in more than one zoning district, so where the line falls deserves a closer read.
  6. Shape of some parcels. On a site of separate parcels, some (not all) are under the practical-lot screen.
  7. Dwelling unit and building-type limits. The dwelling unit limit (ZR 23-52) or a limit on building types holds the count of homes below what the floor area could hold at the smaller home sizes. Floor area still limits the size of the building.
  8. Floor area. Otherwise, the maximum floor area is the limit.

Flags

Each site page lists what could change or qualify its figures. Hazards and cautions come first, notes last. Every flag names its sources.

Flood
The site's measured overlap with FEMA's 2015 Preliminary FIRM (the 1% and 0.2% annual chance floodplains), the effective 2007 FIRM, and DEP's Stormwater Flood Maps for a moderate storm in the 2050s and an extreme storm in the 2080s. An overlap nowhere 5 feet wide, or under 1% of the site, is a note, not a hazard.
Where the project is
Placed by the tracker's map point or address only, with the reason (see where each project is).
Buildings on the land
MapPLUTO records building floor area or homes on a listed lot. Zoning counts existing floor area toward the maximum, so the figures are the most the land could hold in total. A building completed in 2020 or later is flagged separately, since the tracker may already count its homes.
Ownership
A listed lot whose MapPLUTO owner type is not City (NYCHA, State or federal, mixed, fully tax-exempt, or private) and whose recorded owner is not a City agency, or a condominium billing lot, whose area and outline are the condominium's base lot. MapPLUTO's fully tax-exempt type covers City, other public and institutional owners alike, so it is reported as not recorded as City-owned, not as private.
Lot shape and size
A zoning lot under the practical lot screen (frontage, depth or area), or an interior lot with no street frontage.
Recorded and drawn lot area
MapPLUTO's recorded lot area, which the figures use, is compared with the drawn lot outlines, with and without mapped street beds. A gap over 20% is a caution that says which way the figures would move if the outlines are right. Outlines that agree only once street beds are taken out, and single lots whose recorded and drawn areas differ by more than a quarter, are noted. A lot whose area the site page sets under the lot area rules above is left out of this comparison, since the page's note on lot area already sets it against the drawn outline.
Split zoning
A lot divided between zoning districts that each cover at least a tenth of it. Floor area is computed portion by portion either way. Where MapPLUTO's district fields also name a district that the zoning map shows only as a strip under 5 feet wide, the flag says so.
Mapped parkland
At least 1% of the site is mapped as a public park, where no zoning district applies (ZR 11-13), so it adds no floor area. A new use of dedicated parkland needs State legislation.
Special districts, landmarks and (E) designations
The site's special purpose district and what it does to floor area; a limited height district; a designated landmark or historic district, which needs Landmarks Preservation Commission approval; and City Environmental Quality Review (E) designations for hazardous materials, air quality or noise.
Mandatory Inclusionary Housing
The site is in an MIH area, where new housing must include permanently affordable homes (ZR 27-131). Where DCP's MIH map covers only part of the site, the flag gives the share.
Community facilities in M1 districts
At least a tenth of the site is in an M1 district, where most community facilities need a special permit (ZR 42-133).
NYCHA land (HUD Section 18)
If selling or leasing NYCHA land needs HUD approval under Section 18, ZR 23-06 applies its own bulk rules; the flag says whether the existing building would make them lower the floor area. Public data do not say whether Section 18 governs.
Options the figures leave out
An optional building form or rule that could allow a little more floor area (sky exposure plane buildings in R6, ZR 23-73; predominantly built-up areas, ZR 23-71), or a higher figure open only to qualifying senior housing.
Rules state
A floor area limit that depends on a condition public data cannot settle (shown as a span), or a rule not yet verified against both the Zoning Resolution and MapPLUTO.
Rezoning
A recent or proposed rezoning of the site, with its City Planning project and status.

Community asks

What each community board formally asked for, from the Charter-mandated annual statements. No model reads, scores or ranks them.

Source: the FY2027 Register of Community Board Budget Requests (OMB, Adopted Budget, June 30, 2026), which carries each agency's written response, matched to the Section 7 entries of each board's FY2027 Statement of Community District Needs and Community Board Budget Requests (DCP). 3,809 requests across 59 boards; 297 fall in the categories below; the quotation of 296 was found verbatim on the cited page by script.

Each ask shows the board's own words (at most 25, a verbatim prefix of its explanation), the page, and the agency's response. Categories come from a declared table keyed on DCP's standardized request types. No request is matched to a building use from its type alone: on these sites' boards the type was a poor guide, with hospital and trauma-center requests filed as health facilities and program funding filed as senior centers or child care. A request is listed as one that could share a building with housing only when a person's review marks it as asking for new space a housing building could hold, and never when the agency reports it already completed. Such a mark is a physical possibility, not a recommendation. No person has reviewed the asks yet, and each ask says so. Reviews are recorded in data/manual/asks-review.json.

Priorities in FY2027 rank requests within each agency and request type, not across the board, so they are not presented as a board's top asks.

Standardized request typeCategory
Provide more housing for extremely low and low income householdsHousing
Provide more housing for seniorsHousing
Provide more housing for medium income householdsHousing
Provide more housing for special needs households, such as the formerly homelessHousing
Create more housing on NYCHA propertiesHousing
Provide, expand, or enhance programs for homeowners and first-time homebuyersHousing
Funding for a new senior center programOlder adults
Other senior center program requestsOlder adults
Renovate or upgrade a senior centerOlder adults
Create a new, or renovate or upgrade an existing public libraryLibraries
Extend library hours or expand and enhance library programsLibraries
Extend library hours, expand library programs, and enhance library collectionsLibraries
Provide, expand, or enhance funding for Child Care and Head Start programsChild care
Provide a new or expanded health care facilityHealth
Renovate or upgrade an existing health care facilityHealth
Provide, expand, or enhance Cornerstone and Beacon programs (all ages, including young adults)Community space
Renovate or upgrade NYCHA community facilities or open spaceCommunity space
Provide a new or expanded park or amenity (i.e. playground, outdoor athletic field)Open space

Leftovers

City-owned land too small or landlocked to build alone, and unused floor area on City-owned facilities.

Orphan lots are City-owned lots (MapPLUTO owner type C) under the orphan screen above, excluding parkland (a new use of dedicated parkland needs State legislation, per the State Parks handbook on parkland alienation), submerged or island lots, and lots with any record in the City's property list (COLP) of use as roads, rail, transit, bridges, tunnels, piers, substations, or pumping or treatment plants, or as open space (natural areas, playgrounds, fields, gardens). Those lots never count as a neighbor to combine with either. Adjacent lots are those sharing at least 5 feet of tax-lot boundary on the same block. A City + City assemblage joins the orphan with adjacent City-owned lots that MapPLUTO records as vacant or used for parking and that COLP shows as unused or used for parking only (a lease or any other recorded use rules a lot out), so the City could pursue it alone; City + private assemblages are shown for context and are never presented as available.

Unused floor area is (maximum FAR − built FAR) × lot area for City-owned COLP facilities (offices, schools, libraries, cultural, public safety, health and social service, maintenance). The low end uses the higher of the community facility and standard residential maximums; the high end, the higher of the community facility and affordability-linked residential maximums. Built FAR is DCP's estimate in MapPLUTO. Landmark sites are flagged with the Zoning Resolution's transfer provisions (§ 75-42), marked unverified until checked. The same infrastructure and open-space uses are left out. Neither list is summed: each row is a zoning figure for one lot, and a citywide total would not be an amount the City could build.

The ledger is shared by password.

Sites in depth

12 sites were chosen for closer attention and a printable handout in the packet. The checks below cover every site, not only these.

How they were chosen:

  • Still open: the City's tracker lists the site as Pre-RFP or RFP Active, so this analysis can still inform the request for proposals.
  • Every borough represented, with at least two sites each. Staten Island has only one open site whose lots a City document confirms, so its second site (Hillside Grove) is one already through public approval.
  • A range of situations: library co-location, landmark and historic-district review, flood hazard, split and special-district zoning, and sites whose current zoning does not allow the number of homes the tracker lists.
  • Each site's tax lots confirmed against a City document; sites whose lots no document identifies were replaced.

Checks

What has been verified, and how.

Open data issues

Known gaps and disagreements between sources, listed rather than hidden. 109 open.

Sites not placed on a tax lot

Reproduce it

The code and data are available on request.

pnpm data:fetch retrieves every input and archives it; pnpm data:compile compiles the site's data offline; pnpm test runs the worked-example tests; pnpm build builds the site.

Inputs fingerprint: 2fb540bd1cb3613f.

Public Ground is an independent project. It is not affiliated with the City of New York, and nothing here is a zoning determination. Corrections are welcome–write to ps4161@nyu.edu.