NYC Zoning Resolution: Districts, Use Groups, and Bulk Rules

The New York City Zoning Resolution is the binding legal code that controls what can be built, and what activities can take place, on every lot in the five boroughs. It sorts each property into a Residential, Commercial, or Manufacturing district, sets the uses allowed there, and caps how large and what shape a building can be. The current code runs to 14 articles, 11 appendices, and 126 zoning maps, and it is amended regularly.¹ The most recent overhaul, City of Yes for Housing Opportunity, was adopted by the City Council on December 5, 2024, and reshaped parking rules, legalized accessory dwelling units in low-density areas, and added new affordability bonuses citywide.

The Three District Categories

Every lot sits in a Residential (R), Commercial (C), or Manufacturing (M) district. The letter signals the general purpose. The number after it signals density: R1 is reserved for detached single-family homes on large lots, while R10 permits high-rise apartment towers. The core rules for each category live in Article II (residential), Article III (commercial), and Article IV (manufacturing).¹

Suffixes add more detail. A district labeled R6A or R6B is a contextual variant of R6 with stricter height limits and street-wall rules, while a plain R6 allows more flexibility in building shape. Commercial districts work the same way: a C4-2 carries the residential-equivalent density of an R6, and a C6-4X mirrors the high-density allowances of an R10X.² Manufacturing districts run from M1 (light industrial, often sited next to commercial uses) to M3 (heavy industrial, with the fewest limits on noise, vibration, and emissions).

Commercial Overlays

Not every commercial area gets a standalone district. In many residential neighborhoods, the city maps a commercial overlay, a C1 or C2 designation layered on top of the underlying residential zoning, to allow small-scale retail and services along busy avenues without converting the whole block. Overlays typically permit local shops, restaurants, and personal services on the ground floor while residential uses continue above and on side streets. They appear on the zoning maps as narrow strips along specific street frontages, and they are easy to miss if you aren’t looking for them.

Use Groups: What Activities Are Allowed

Within each district, the resolution sorts every possible land use into Use Groups that share similar characteristics. The current system has 10 Use Groups, labeled with Roman numerals I through X.³ Use Group I covers agriculture and open uses, Use Group II covers residences, Use Group III covers community facilities such as schools and houses of worship, and Use Group IV covers public service facilities and infrastructure.⁴ As the numbers climb, the permitted activities move through retail and entertainment and into production and industrial operations at Use Group X.

Residential districts allow Use Groups I through VIII. Commercial and manufacturing districts allow all ten.³ A production facility that falls under Use Group X cannot operate in a residential R6 district, but a neighborhood grocery store assigned to a lower-numbered use group can serve customers across many commercial zones.

As-of-Right Development

When a project fits every use-group permission and every bulk rule for its district, it qualifies as “as-of-right.” The owner files plans with the Department of Buildings, pulls standard building permits, and proceeds without discretionary review or a public hearing. Most routine construction in the city, from renovations to small residential buildings to commercial fit-outs, happens this way. The predictability is the point: if your plans comply with the resolution, no one votes on whether to let you build.

Bulk Rules: How Big and What Shape

Bulk regulations govern size and placement. The most important number is the Floor Area Ratio, or FAR, which sets the total building space allowed as a multiple of the lot’s area. Multiply the lot by the district’s FAR and you get your maximum square footage. A 10,000-square-foot lot in a district with a FAR of 2.43 can hold up to 24,300 square feet of floor area. The same lot in an R6A contextual district gets a FAR of 3.0 on a wide street, which translates to 30,000 square feet but with a fixed height cap.²

FAR values span a wide range. Low-density R1 and R2 districts sit at 0.5, while high-density R8 districts on wide streets outside the Manhattan Core can reach 7.2.² The Department of City Planning has flagged that its district guide will be updated later in 2026 to reflect City of Yes changes, so some maximum FARs may shift. Always check the current resolution text for the live numbers.

Sky Exposure Plane and Setbacks

To keep streets from becoming dark canyons, the resolution uses the sky exposure plane, an imaginary sloped surface that begins at a set height above the street line and angles back over the lot. A building can rise straight up to that initial setback height, but above it the structure must step back so it does not pierce the plane. The slope varies by district and street width. In M1-1 manufacturing districts, the plane rises at a 1:1 ratio, one foot of height for each foot of horizontal setback, which is a steep constraint. In higher-density manufacturing districts like M1-3 or M2-2, the slope on wide streets jumps to 5.6:1, allowing much taller buildings before the setback bites.⁵

Contextual vs. Non-Contextual Districts

Contextual districts, identified by letter suffixes such as R6A, R6B, and R7A, impose fixed height limits and street-wall requirements meant to make new buildings match the scale of the surrounding block. Typically, 70 percent of a building’s street-facing wall must sit within a set distance of the street line and rise to at least a minimum base height before any setback. Non-contextual districts give architects more freedom to shape the building, but the sky exposure plane still limits the overall envelope. Contextual zoning has become the city’s default in recent rezonings because it gives neighbors more certainty about what will go up next door.

Lot Coverage and Open Space

FAR is not the only limit. The resolution also sets rules for how much of a lot a building can cover and how much must stay open, which vary by district and building type. Each district has a corresponding table in the resolution. Two buildings with identical FAR can look very different as a result: one may spread low across most of the lot, while the other rises taller on a smaller footprint to preserve more open ground.

Special Purpose Districts

Some neighborhoods have planning needs the standard rules can’t address, so the city creates Special Purpose Districts with supplemental or replacement regulations. These districts live in Articles VIII through XIV and cover dozens of areas across the five boroughs.⁶

The Special West Chelsea District, for example, was created to support the conversion of the High Line into public open space while preserving the surrounding gallery district.⁷ In the Theater Subdistrict of Midtown, special rules protect historic Broadway theaters by letting them transfer unused development rights to nearby receiving sites. A listed theater can sell its unused FAR to a developer building elsewhere in the subdistrict, with a contribution of $24.65 per square foot deposited into the Theater Subdistrict Fund.⁸ Developers in any special district have to follow both the special text and the underlying standard rules.

Non-Conforming Uses After a Rezoning

When the city rezones an area, some existing buildings and businesses stop complying with the new rules. A warehouse operating in a block rezoned to residential becomes a “non-conforming use.” The resolution does not force these uses to shut down, but it is designed to phase them out over time, and the restrictions tighten whenever something changes.⁹

A non-conforming use in a commercial or manufacturing district can expand, but only by up to 25 percent of the floor area it occupied when it first became non-conforming, and the expansion itself must meet current performance standards. The bigger trap is discontinuance: if a non-conforming use stops operating for a continuous two-year period, the right to resume it is permanently lost, and the property must switch to a conforming use. Intent to reopen does not matter. The clock runs regardless of the owner’s plans.⁹

Damage adds another layer. If a building substantially occupied by a non-conforming use is damaged to the extent of 50 percent or more of its floor area, the owner can repair the building and continue the non-conforming use, or reconstruct it. A reconstruction, though, must switch to a conforming use.⁹ Owners often learn this provision for the first time after a fire or severe storm.

Mandatory Inclusionary Housing

In areas the city has rezoned for greater residential density, Mandatory Inclusionary Housing (MIH) requires developers to set aside a share of units as permanently affordable. The requirement applies to any new building, enlargement, or conversion that exceeds 10 units or 12,500 square feet of residential floor area.¹⁰

Developers choose from several affordability options:

Option 1: 25 percent of floor area affordable to households at an average of 60 percent of Area Median Income (AMI), with 10 percent of that targeted at 40 percent of AMI.
Option 2: 30 percent of floor area affordable at an average of 80 percent of AMI.
Option 3: 20 percent of floor area affordable at an average of 40 percent of AMI.
Option 4, where designated: 30 percent of floor area affordable at an average of 115 percent of AMI, with portions at 90 percent and 70 percent of AMI.

For rental buildings, the affordable units must be spread across at least 65 percent of the building’s stories; concentrating them on lower floors is not allowed. At least half the MIH units must have two or more bedrooms.¹⁰ Smaller projects between 10 and 25 units can pay into an affordable housing fund instead of building the units on site.

City of Yes for Housing Opportunity

Adopted by the City Council on December 5, 2024, City of Yes for Housing Opportunity is the most significant citywide zoning text amendment in years. The city projects it will enable 82,000 new homes over 15 years.¹¹ The changes most likely to affect property owners and developers:

Accessory Dwelling Units. Owners of one- and two-family homes in low-density districts can now add one ADU of up to 800 square feet and two stories. The unit must sit at least five feet from lot lines and cannot cover more than 33 percent of the rear yard, 50 percent in some cases. Detached backyard ADUs are prohibited in the most restrictive contextual districts (R1A, R2A, R3A) unless the lot is in the Greater Transit Zone, and all ADUs in coastal flood zones must be elevated above the floodplain. You must live on the property to add one.¹²
Parking mandates. A three-zone system replaces the old uniform requirements. Zone 1 (Manhattan below Inwood, Long Island City, parts of western Queens and Brooklyn) eliminates residential parking mandates entirely. Zone 2 significantly reduces them. Zone 3 keeps most mandates but exempts ADUs, conversions, affordable housing, and transit-oriented development.¹²
Universal Affordability Preference. Buildings in medium- and high-density districts can add at least 20 percent more housing above their base FAR if the extra units are income-restricted at 60 percent of AMI.¹¹
Transit-Oriented Development. Modestly sized apartment buildings are again permitted in low-density R3 through R5 districts on qualifying sites: at least 5,000 square feet, on a wide street of 75 feet or more or the short end of the block, and within designated transit-eligible areas.¹¹
Town Center Zoning. Allows two- to four-story residential buildings above ground-floor commercial space in areas with commercial overlays. Projects of 50 or more units must make 20 percent of units affordable at 80 percent of AMI to take full advantage.¹²
Office and hotel conversions. The amendment expands eligibility for converting non-residential buildings to housing citywide and moves the eligibility cutoff date to buildings constructed by 1991.¹¹

Because these are text amendments to the resolution itself, most qualifying projects proceed as-of-right.

How to Look Up Your Lot’s Zoning

Start with ZoLa, the Department of City Planning’s Zoning and Land Use map. Search by address or Tax Block and Lot number and you’ll see the zoning district, any special districts or overlays, and the applicable map designation.¹³ The city’s 126 zoning maps are designated by numbers and letters, like Map 8c or Map 12a, and are updated regularly to reflect new amendments.

Once you have the district code, cross-reference it against the full searchable text of the resolution.¹ Match your district type to its article: Article II for residential, Article III for commercial, Article IV for manufacturing. Then work through the specific chapter for use regulations, bulk rules, or parking. Boundary lines on the maps generally follow the center of streets, so a property near a boundary needs careful reading to confirm which side it falls on.

When You Need Discretionary Approval

Two paths exist when a project cannot proceed as-of-right. Rezonings and special permits go through the Uniform Land Use Review Procedure. Variances from specific requirements go to the Board of Standards and Appeals.

ULURP

Required by the City Charter, the Uniform Land Use Review Procedure is a structured public review with strict deadlines at every stage.¹⁴ Applications move through five bodies in sequence:

The Community Board has 60 days to hold a public hearing and vote. Its recommendation is advisory.
The Borough President submits a recommendation within 30 days or waives the right to weigh in.¹⁵
The City Planning Commission holds its own public hearing and must vote within 60 days of the Borough President’s review.
The City Council holds a hearing and votes within 50 days. It can approve, modify, or deny.¹⁴

The total timeline from certification to final vote typically runs about seven months. Pre-certification work, including environmental review under CEQR, can add considerably to the front end: an Environmental Impact Statement for a large rezoning can take a year or more to prepare before the ULURP clock even starts.¹⁶

Variances and the Board of Standards and Appeals

A variance is permission to deviate from a specific zoning requirement because of a unique hardship on the property. The Board of Standards and Appeals is a quasi-judicial panel, and the standard is deliberately difficult. The board must make all five of these findings before granting relief:

The lot has unique physical conditions, such as irregular shape, unusual topography, or exceptional narrowness, that make strict compliance impractical and are not shared by the surrounding neighborhood.
Because of those conditions, there is no reasonable possibility that a fully compliant project would earn a reasonable financial return. Non-profit applicants are exempt from this finding.
The variance will not alter the essential character of the neighborhood, harm neighboring properties, or hurt the public welfare.
The hardship was not self-created by the current or a prior owner. Buying a lot that already carries the restriction does not count as a self-created hardship.
The variance is the minimum relief necessary. The BSA can grant less than what the applicant requests.¹⁷

Every finding must be satisfied. Failing one means denial. The BSA is not looking for persuasive arguments; it is looking for proof on each element. A case built on the shape or physical limits of the lot is far stronger than one built on what the owner would prefer to do with it.

1
NYC Planning. Zoning Resolution
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NYC Department of City Planning. Residence Districts
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NYC Zoning Resolution. NYC Zoning Resolution – Article III, Chapter 2 – Use Regulations
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NYC Zoning Resolution. NYC Zoning Resolution – Article II, Chapter 2 – Use Regulations
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NYC Zoning Resolution. NYC Zoning Resolution – 43-43
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NYC Zoning Resolution. NYC Zoning Resolution – Article IX
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NYC Department of City Planning. West Chelsea Zoning Proposal – Approved!
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NYC Zoning Resolution. NYC Zoning Resolution – 81-744
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NYC Zoning Resolution. Chapter 2 – Non-Conforming Uses – Zoning Resolution
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NYC Department of City Planning. Mandatory Inclusionary Housing
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NYC Department of City Planning. City of Yes for Housing Opportunity
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NYC City Council. Summary of NYC Council’s City for All Investments and Modifications
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NYC Planning. ZoLa – NYC’s Zoning and Land Use Map
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NYC Department of City Planning. Public Review
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NYC Department of City Planning. Uniform Land Use Review Procedure (ULURP)
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NYC Department of City Planning. Environmental Review
17
NYC Zoning Resolution. Chapter 2 – Interpretations and Variances – Zoning Resolution