Zoning and land use
R, C and M zoning districts in New York City
Every NYC lot sits in a residential, commercial or manufacturing district, often with an overlay or a special district on top of it. Here is how to read yours.
What do R, C and M zoning districts mean in New York City?
Quick Answer
How the rules are read
Who does this land on?
Anyone reading a listing, a lease or a development pro forma. The district designation is the first fact that decides what the property may be, and it is the fact most often quoted second-hand and wrong.
What governs it?
- The New York City Zoning Resolution, which maps every lot in the five boroughs into a base district
- The zoning maps themselves, which the Department of City Planning publishes and the City Council amends parcel by parcel
- Commercial overlays (the C1 and C2 series) mapped inside residence districts along corridors
- Special purpose districts, which layer additional rules over the base district in defined areas
- The Department of Buildings, which applies all of the above when it reviews a job filing
How does the process run?
- Find the block and lot, then read the base district off the City Planning zoning map for that parcel
- Note the number after the letter: it scales density and bulk, so R6 and R8 permit very different buildings
- Check whether a commercial overlay is mapped over a residence district, which permits ground-floor retail the base district would not
- Check whether a special purpose district applies, because its rules displace the base district where they conflict
- Read the permitted use groups for that district, then the bulk rules: floor area, height, setback, yards and open space
- Confirm the reading against the certificate of occupancy, which records what the building lawfully is today rather than what the district would allow now
Where does it bite in a transaction?
- A buyer prices a lot on the district a broker quoted rather than the district the map shows
- A retail tenant signs a lease in a residence district with no commercial overlay reaching the space
- A development budget assumes base-district bulk in a special purpose district with stricter rules
- An appraisal treats a non-conforming building as if the current district permitted it
Does the district decide what the building may be used for?
It decides what is permitted going forward. It does not by itself decide what is lawful today, because a use established before the rule changed can survive as a non-conforming use. The district tells you what you could file for; the certificate of occupancy tells you what the City already recognizes.
What is a commercial overlay?
A commercial overlay is a C1 or C2 district mapped over a residence district, usually along an avenue, that permits local retail and service uses on the lower floors while the residence district continues to govern the rest of the building. Overlays are mapped narrowly, often only to a set depth from the street line.
What is a special purpose district?
A special purpose district is an area where the Zoning Resolution adds its own rules for use, bulk, street walls, ground-floor frontage or transfers of development rights. Where a special district rule conflicts with the base district, the special district controls, which is why the base district alone is never a complete answer.
Can a district change after you buy?
Yes. Zoning maps are amended through the public review process, and a rezoning can add or remove development capacity from a lot you already own. A use lawfully established before the change is generally protected as non-conforming, but unbuilt development capacity is not a vested right.
What else should you read before you file or sign?
In the glossary
- BBL (Borough-Block-Lot)The tax lot identifier for a parcel of New York City real property, written as borough, block and lot. Nearly every City record system keys on it r...
- Certificate of Occupancy (C of O)The Department of Buildings document that fixes a building's legal use and occupancy. Lenders and title companies read it to confirm the property c...
- Zoning lot certificateA recorded declaration combining tax lots into one zoning lot for development purposes. Waivers and consents from affected owners and lienholders a...
- SurveyA surveyor's drawing of the parcel, its improvements and any encroachments. Lenders on houses and townhouses generally require a current one or a s...
- Letter of No ObjectionA DOB letter confirming the lawful use of a building constructed before Certificates of Occupancy were required. It stands in for a C of O on many ...
Building types
- Mixed-use condo with commercial unitsA condominium holding both residential and commercial units, where the declaration allocates common charges, voting rights and use restrictions bet...
- Townhouse and 1-4 family condo declarationA small building divided into condominium units, where outdoor space, party walls, multiple-dwelling registration and the certificate of occupancy ...
Zoning and land use
- Zoning use groupsThe Zoning Resolution sorts every activity into a use group, and each district permits only some of them. Here is how to find the group that govern...
- Legal non-conforming use and grandfatheringA use lawful when it started can continue after the zoning changes, but the protection is narrow and it can be lost. Here is what it covers and how...
- Floor area ratio and how much you can buildFloor area ratio multiplied by lot area sets the buildable floor area. Here is how it is calculated, what is excluded, and why the zoning lot is th...
- Zoning due diligence before you signSix records answer almost every zoning question on a New York City property, and all six can be pulled before the contract rather than after the de...
- Rezonings and zoning text amendmentsA rezoning changes the map for specific lots. A text amendment changes the rulebook citywide or by district type. They follow different Charter paths.
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Legal Disclaimer: This page is general information about New York practice. It is not legal advice, it does not account for the terms of any particular contract, building or transaction, and reading it does not create an attorney-client relationship. This is attorney advertising. Prior results do not guarantee similar outcomes.