NYC Residential Zoning Districts Explained: R1 to R10, What Each Lets You Build

Short answer: NYC's residential districts run from R1 to R10, and the number tells you the density. Low numbers (R1, R2) are for detached single-family homes on big lots; high numbers (R9, R10) allow tall, dense apartment buildings. The higher the number, generally the more you can build.

If you've looked up a property and seen a label like "R4" or "R7-2," that's your residential zoning district. It's the single biggest clue to what you can build. Here's how the R1-to-R10 system works, in plain English.

The basic idea: the number is a dial for density

NYC groups residential zoning into ten families, R1 through R10. Think of the number as a density dial. Turn it up and the city lets you build more: more floor area, taller buildings, and more housing units. Turn it down and you get lower, less dense development, usually houses instead of apartment buildings.

The lower districts prioritize open, suburban-style neighborhoods. The higher districts are where you find the mid-rise and high-rise apartment buildings of denser parts of the city. Most of NYC's residential land sits somewhere in the middle.

The low end: R1 and R2

R1 and R2 are the least dense residential districts. They're built around detached single-family houses on relatively large lots, with required front, side, and rear yards that give these neighborhoods their green, spread-out feel. If you're in an R1 or R2 area, expect the rules to point toward one house per lot with real yard space around it.

The middle: R3, R4, and R5

These are the "in-between" districts, and they cover huge swaths of the outer boroughs. Depending on the exact district, they allow a mix of detached, semi-detached, and attached houses, and in some cases small multi-family buildings. This is the range where many homeowners live and where questions about extensions, conversions, and adding a unit come up most often. The specific rules vary quite a bit within this group, so the exact sub-district (like R4-1 versus R4B) matters.

The higher end: R6 through R10

From R6 up, you're generally in apartment-building territory. These districts allow larger, taller multi-family buildings, and the allowable floor area and height climb as the number goes up. R10 is the densest residential district in the city, the kind that produces tall apartment towers. As density rises, so does the role of other rules, like how the building must step back and how much of the lot it can cover.

Why the letters and dashes matter (R6A, R7-2, R4B)

You'll rarely see a plain "R6." Most districts carry a suffix, like a letter (R6A, R6B) or a number (R7-1, R7-2). These suffixes fine-tune the rules within a family, often controlling the building form, height limits, and setbacks. Two lots that are both "R6" can behave very differently if one is R6A and the other is R6B. So when you look up your property, read the whole district label, not just the first digit.

How the City of Yes fits in

The City of Yes for Housing Opportunity changes, which took effect in December 2024, adjusted many residential rules across these districts, including things like accessory dwelling units and parking. So while the R1-to-R10 framework still describes the density ladder, some of the specific numbers behind each district were updated. If you're relying on an older chart, confirm your figures against the current Zoning Resolution.

How to find and read your district

Your district is mapped by location. You can find it on the city's free zoning map (ZoLa) by searching your address, then look up that exact district (suffix and all) in the Zoning Resolution to see what it allows. The label tells you the family; the full district code tells you the details.

Not sure what your district actually lets you do? Enter your address into Zohgo and it will identify your exact district and explain, in plain English, what you can build there and how it applies to your goals. Try Zohgo free at zohgo.ai.

This article is general information about how NYC zoning works, not legal or professional advice. Districts, suffixes, and their rules are detailed and change over time, so confirm the specifics for your property against the current Zoning Resolution or with a licensed professional before making decisions.

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