Individual condo units (residential). Class R is NYC's condominium stock — each individual unit has its own BBL (Borough-Block-Lot) number and separate tax assessment.
NYC DOF Class R · Residential · ~275,000 condo units citywide
Class R is an NYC Department of Finance building classification for individual condo units (residential). Class R is NYC's condominium stock — each individual unit has its own BBL (Borough-Block-Lot) number and separate tax assessment. The building itself often retains a Class D (elevator) or Class C (walk-up) designation while the individual units are Class R.
Class R is NYC's condominium stock — each individual unit has its own BBL (Borough-Block-Lot) number and separate tax assessment. The building itself often retains a Class D (elevator) or Class C (walk-up) designation while the individual units are Class R.
Family: Residential · Approximate NYC count: ~275,000 condo units citywide
Class R buildings are typically found in: R6A, R7A, R8, R8A, R10, C6-2
Zoning determines bulk, density, and use. Checking your building's zoning alongside its class reveals what's legally possible on the lot.
| Sub-code | Meaning |
|---|---|
| R0 | Condo — mixed-use elevator |
| R1 | Condo — 2-10 unit walk-up |
| R2 | Condo — walk-up (building with more than 10 units) |
| R3 | Condo — 1-3 story |
| R4 | Condo — residential unit in elevator building |
| R5 | Miscellaneous commercial (condo) |
| R6 | Condo — one-family dwelling in 2-3 story |
| R7 | Condo — commercial unit in 1-3 story |
| R8 | Condo — commercial unit in elevator building |
| R9 | Condo — co-op conversion from loft/warehouse |
Your building class is set by the NYC Department of Finance and published in PLUTO (Primary Land Use Tax Lot Output) maintained by the Department of City Planning. You can look it up by searching your address on RegWatch, or directly on the DCP ZoLa portal using the lot's BBL (Borough-Block-Lot).
Yes, but it requires a formal change. A Class R designation reflects the building's current use and configuration. Renovations that change the fundamental use (adding units, converting commercial to residential, or condo conversion) require a new Certificate of Occupancy from DOB — which may result in a new class code being assigned by DOF on the next assessment.
Individual unit owner handles interior compliance. Condo association handles building-wide compliance (FISP, LL97, boilers, elevators). Individual unit sales taxed via DOF. Full list above. Note that RegWatch property reports automatically calculate which obligations apply based on your building's specific characteristics (class, size, stories, construction year, occupancy).
Indirectly — classification drives which regulations apply, which affects operating costs, insurance rates, and buyer expectations. Commercial classes (O, K) have different financing and diligence norms than residential (A–D). Mixed-use (S) adds complexity. Condos (R) are valued per-unit rather than per-building. Buyers and lenders always verify classification during due diligence.
We use building class to determine which compliance obligations, deadlines, and violation patterns are relevant to each property. A Class D elevator building gets different risk flags than a Class B two-family home. This drives the per-property compliance calendar, risk scores, and vendor matching.
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